JP4403959B2 - Vehicle fault diagnosis device - Google Patents

Description

  The present invention relates to a vehicle failure diagnosis device, and more particularly to a vehicle failure diagnosis device for diagnosing a failure due to an engine start failure.

  Vehicles are required to be equipped with an on-board diagnostic device (OBD) in response to exhaust gas regulations that are becoming more severe year by year. The on-vehicle failure diagnosis device is a device that detects and monitors the abnormality of the exhaust gas countermeasure device itself, displays an alarm to notify the driving vehicle when an abnormality occurs, and stores and stores the details of the failure. The vehicle-mounted failure diagnosis apparatus is generally provided in an ECU (Electrical Control Unit) that controls the entire vehicle.

  As such a vehicle-mounted failure diagnosis device, for example, Patent Document 1 provides a different failure code for each vehicle-mounted component so that a failed vehicle-mounted component can be identified, and outputs and stores a failure code when there is a vehicle-mounted component that has failed. A vehicle-mounted fault diagnosis device is disclosed. Specifically, the on-vehicle failure diagnosis device of Patent Document 1 measures the starting rotational speed and the elapsed time after the starter is turned on when the engine is started, and compares the measured value with a preset value to set When the condition is satisfied, a determination function for determining a start-up failure including an engine stall or engine start failure and a storage function for storing start-up data when the start-up failure is determined are provided.

  The engine start failure is generally considered to be caused by the failure of a great number of in-vehicle components. On the other hand, in the current in-vehicle type failure diagnosis device, the detected failure is limited to the failure of a specific component, and when the failed component cannot be identified, it cannot be determined as a failure. Therefore, even if the driver brings the vehicle to a repair shop when an engine start failure occurs, no fault code remains, and the repair shop has to revalidate the fault in order to grasp the situation.

  In addition, engine start failures occur only under special conditions, and in the case of failures with low reproducibility, there is a problem that it takes a great deal of man-hours for revalidation and analysis of the cause of the failure is very difficult. there were.

In view of this, the vehicle-mounted failure diagnosis device according to Patent Literature 1 uses, as means for starting, the starting rotational speed and the elapsed time after starter-on when it is determined that the engine has failed as a means for solving such a problem as starting data. save.
JP 2004-44407 A JP-A-3-249359 JP 2004-36506 A JP 2001-248494 A

  Here, the engine start failure occurs only under special conditions as described above. The generation conditions greatly depend on the use situation of the vehicle by the driver until the engine start failure.

  For example, the frequency at which the engine is started differs between when the driver runs the vehicle almost every day and when the driver runs only on weekends. Further, there is a difference in the state when the engine is started when the average travel distance in one run is relatively long and when it is relatively short.

  Further, the usage status of the vehicle is further different depending on the shift operation in the automatic transmission. That is, in the automatic transmission, the shift position (for example, the reverse travel position, the neutral position, and the forward travel position) is set based on the slide operation of the shift lever by the driver. And since the slide operation differs for every driver, a difference arises in the use condition of a vehicle as a result.

  Such differences in vehicle usage by the driver are combined in a complex manner, causing engine start failure.

  However, according to the conventional in-vehicle type failure diagnosis apparatus, only the starting rotational speed and the elapsed time after the start-on are stored as the starting data when the engine starting failure occurs. That is, the above-described vehicle usage status is information necessary for analyzing the cause of engine start failure, but none of them is stored as data. Therefore, the current situation is that the repairer can obtain the vehicle usage status only by listening to the driver.

  Further, in listening after the engine start failure has occurred, there is a problem that it is difficult to accurately reproduce the vehicle usage situation because the driver relies heavily on the memory of the driver himself. Therefore, in order to facilitate the analysis of a failure due to an engine start failure, it is desirable that the usage status of the vehicle is also stored as objective data.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vehicle failure diagnosis device that facilitates analysis of failure due to engine start failure.

  According to the present invention, there is provided a vehicle failure diagnosis apparatus comprising a start abnormality detecting means for detecting a start abnormality of an internal combustion engine and a data storing means for storing data necessary for analyzing a failure due to the start abnormality. The data includes data indicating the usage status of the driver's vehicle before and after the detection of the start abnormality.

  Preferably, the data stored in the data storage unit is read out of the vehicle by the data reading unit.

  Preferably, the start abnormality detecting means outputs a detection result signal instructing that the start abnormality is detected to the data storing means. The data storage means is a storage means for acquiring and storing data every predetermined unit time, and when receiving the detection result signal, the storage means stores the data after elapse of at least one predetermined unit time from the detection of the start abnormality. And control means for stopping the acquisition.

  Preferably, the data indicating the usage status of the vehicle includes the number of times the starter is turned on from the start of the vehicle system to the detection of the start abnormality, and the internal combustion engine when the starter is turned off when the start abnormality is detected. It includes at least one of the rotational speed and the travel distance of the trip just before the vehicle system is activated.

  Preferably, the data indicating the usage status of the vehicle further includes a period during which the starter is kept on per one starter-on operation.

  Preferably, the start abnormality detecting means detects the start abnormality when the rotational speed of the internal combustion engine is equal to or lower than the predetermined rotational speed even though the starter is kept on for a predetermined period.

  Preferably, the start abnormality detecting means is set so that the predetermined period becomes longer as the engine temperature of the internal combustion engine becomes lower.

  Preferably, the starting abnormality detecting means includes a timer means for counting a period in which the starter is kept on and the rotational speed of the internal combustion engine is equal to or lower than a predetermined rotational speed, and the timed period exceeds a predetermined period. A start abnormality determining means for determining a start abnormality and outputting a detection result signal, and a counter means for counting the number of times the starter is turned on from the start of the vehicle system to the detection of the start abnormality. .

  Preferably, the timer means outputs to the data storage means a period in which the measured starter is turned on and the rotation speed of the internal combustion engine is equal to or less than a predetermined rotation speed. The counter means outputs the counted number of times the starter is turned on to the data storage means.

  According to the present invention, failure analysis of engine start failure in accordance with the use situation of the vehicle can be performed, so that the number of man-hours required for analysis can be greatly reduced and repair can be performed quickly.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

  FIG. 1 is a schematic block diagram of a vehicle failure diagnosis apparatus according to an embodiment of the present invention.

  Referring to FIG. 1, vehicle failure diagnosis apparatus 100 includes an engine start abnormality detection unit 10 and a freeze frame data storage unit 20.

  The vehicle failure diagnosis apparatus 100 is provided inside an ECU (not shown) mounted on the vehicle 1000. The vehicle 1000 is further equipped with an engine speed sensor 30 and various sensors 40 for detecting the throttle opening, the vehicle speed, the coolant temperature, and the like.

  The engine speed sensor 30 detects the engine speed MRNE when engine cranking starts and the engine starts rotating. The engine speed sensor 30 then outputs the detected engine speed MRNE to the engine start abnormality detection unit 10 and the freeze frame data storage unit 20. Various sensors 40 detect the throttle opening, the vehicle speed, the coolant temperature, and the like, and output the detection results to the freeze frame data storage unit 20.

  When the engine start abnormality detecting unit 10 receives the engine speed MRNE from the engine speed sensor 30, the engine start speed MRNE detects that the detected engine speed MRNE has a predetermined engine speed (for example, in the vicinity of the idle speed) in a predetermined period. ), It is detected that an engine start abnormality has occurred. Then, the engine start abnormality detection unit 10 outputs the detection result to the freeze frame data storage unit 20.

  More specifically, the engine start abnormality detection unit 10 includes an engine start abnormality determination unit 12 that determines whether there is an engine start abnormality, a timer 14, and a counter 16.

  The engine start abnormality determination unit 12 is rotated from an on (ON) position where the ignition key energizes the ignition system of the engine to an engine start (ST) position where the starter is energized, and in response to the starter being turned on. Then, the operation for determining whether there is an abnormality in the engine start is executed. Note that the ignition key is configured to return to the on position when the driver does not apply force to maintain this position at the engine start position. That is, the starter is kept on as long as the driving vehicle keeps the ignition key at the engine start position. And a starter performs cranking from an engine stop state, and starts an engine.

  The determination of whether or not there is an engine start abnormality is made based on the engine speed MRNE detected by the engine speed sensor 30 and the time information from the timer 14 as described below.

  Specifically, when the starter is turned on to rotate and cranking of the engine is started by the rotation of the starter, the engine start abnormality determination unit 12 receives the engine speed MRNE from the engine speed sensor 30. Then, the engine start abnormality determination unit 12 performs a coincidence comparison operation between the engine rotational speed MRNE and a predetermined rotational speed, and determines whether or not the engine is in a complete explosion state based on the comparison result. At this time, if engine speed MRNE is equal to or higher than a predetermined speed, engine start abnormality determination unit 12 determines that engine start is normal.

  On the other hand, the engine start abnormality determination unit 12 starts the timer 14 when the engine speed MRNE falls below a predetermined speed.

  The timer 14 is activated in response to an instruction from the engine start abnormality determination unit 12, and measures a period in which the starter is in an on state and the engine rotational speed MRNE is lower than a predetermined rotational speed. Then, the timing information is output to the engine start abnormality determination unit 12. In addition, the timer 14 outputs the timing information to the freeze frame data storage unit 20 as will be described later.

  Then, the engine start abnormality determination unit 12 determines whether the timed period (= the period in which the starter is on and the engine rotational speed MRNE is lower than the predetermined rotational speed) is longer than a predetermined predetermined period. Determine whether or not.

  At this time, if the measured time period is longer than the predetermined period, the engine start abnormality determining unit 12 determines that the engine has not reached the complete explosion state even though the driver has kept the starter on for the predetermined period. It is determined that the engine start is abnormal. On the other hand, if the measured period is equal to or shorter than the predetermined period, the engine start abnormality determination unit 12 does not satisfy the period necessary for the engine to completely explode when the driver continues to turn on the starter. Judgment is made, that is, it is judged that there is a cause in the key operation of the driver, and it is judged that the engine start is normal.

  Note that the predetermined period is set, for example, to a lower limit value of an on period of the starter necessary for starting the engine. Further, the predetermined period is set to become relatively longer as the engine temperature of the engine becomes lower.

  When the engine start abnormality determination unit 12 determines normality / abnormality of the engine start, the engine start abnormality determination unit 12 outputs a determination result signal to a display unit (not shown) and to the freeze frame data storage unit 20.

  When the vehicle system is activated in response to the ignition key being turned to the on position, the counter 16 is rotated to the engine start position after the vehicle system is activated until the engine is completely started. Count the number of times the is turned on. Then, the counter 16 outputs the count result to the freeze frame data storage unit 20. Note that the counter 16 resets the count result when the engine start abnormality determination unit 12 determines that the engine start is normal.

  The freeze frame data storage unit 20 includes an input interface unit 22, a bus 23, a CPU 24, a clock circuit 26, and a nonvolatile memory 28.

  The input interface unit 22 receives the engine speed MRNE from the engine speed sensor 30, and receives the vehicle speed, throttle opening, cooling water temperature, and the like from the various sensors 40. Further, the input interface unit 22 receives a determination result signal that informs the presence or absence of an engine start abnormality from the engine start abnormality determination unit 12.

  The input interface unit 22 further receives timing information from the timer 14 and receives count information from the counter 16. Specifically, the timer 14 receives a result of measuring a period in which the starter is on and the engine speed MRNE is lower than a predetermined speed. Further, the counter 16 receives the result of counting the number of times the starter is turned on after the vehicle system is started and the engine is completely started.

  The input interface unit 22 transmits the input information to the CPU 24, the clock circuit 26, and the nonvolatile memory 28 via the bus 23.

  The CPU 24 controls the entire freeze frame data storage unit 20. Specifically, the CPU 24 synchronizes with the clock signal output from the clock circuit 26, and detects information from the sensors 30, 40, time information from the engine start abnormality detector 10 and The count information is stored in the nonvolatile memory 28 as freeze frame data (hereinafter also referred to as FFD).

  FIG. 2 is a timing chart for explaining freeze frame data stored in the nonvolatile memory 28 of FIG.

  Referring to FIG. 2, the nonvolatile memory 28 receives from each of the sensors 30 and 40 and the engine start abnormality detection unit 10 every predetermined unit time Δt from the start of the vehicle system (time t = 0). Input information is stored as a set of freeze frame data FFD. The predetermined unit time Δt is set based on the clock signal from the clock circuit 26.

  Specifically, the freeze frame data FFD is arranged in the order of FFD (0), FFD (1), FFD (2),... According to the time series from the start of the vehicle system (t = 0). For example, five sets (FFD (0) to FFD (4)) of the arranged freeze frame data FFD are configured as one set of data groups and temporarily stored in the nonvolatile memory 28. Further, when new input information is written every predetermined unit time Δt, the nonvolatile memory 28 updates data contents included in one set of data groups as needed. For example, at a certain time, a data group including one set of FFD (0) to FFD (4) sets FFD (1) to FFD (5) to one set after the next predetermined unit time Δt has elapsed. Updated to data group.

  Here, as shown in FIG. 2, when the CPU 24 receives a determination result signal instructing that the engine start is abnormal from the engine start abnormality determination unit 12 described above at time t = T, a set of data groups Is updated twice, and writing to the nonvolatile memory 28 is stopped. As a result, the final set of data groups includes three sets of freeze frame data FFD (i-2), FFD (i-1), and FFD (i) before the time of engine start abnormality detection (t = T). And two sets of FFD (i + 1) and FFD (i + 2) after detection of an abnormality in engine start, for a total of five sets of freeze frame data FFD. After the detection of the engine start abnormality, this set of data is stored in the nonvolatile memory 28 as data for instructing the use state of the vehicle before and after the engine start abnormality is detected, as will be described later. become.

  Referring to FIG. 1 again, the nonvolatile memory 28 can be connected to a diagnostic tool 120 outside the vehicle 1000 via a connector 110 provided on the vehicle 1000. The non-volatile memory 28 is connected to the diagnostic tool 120 when a repairer performs a vehicle fault diagnosis, and is a set of data groups (freeze frame data FFD (i−2) to FFD (i + 2)). ) Is read. Then, the repair company analyzes the cause of the failure based on the data content of the read data group.

  Here, as described above, a failure due to an abnormal engine start greatly depends on the use situation of the vehicle of the driver. With regard to the usage status of the vehicle, conventionally, a repair shop usually listens to the driver about the usage status and re-verifies the content that has been heard. However, there are cases where accurate information on the usage status of the vehicle cannot be obtained only by listening. This makes it difficult and inefficient to identify the cause of the failure.

  On the other hand, the freeze frame data FFD according to the present invention includes data necessary for analyzing a failure due to an abnormal engine start. In particular, the phrase frame data FFD includes data indicating the usage status of the vehicle by the driver that has been difficult to reproduce. Thereby, failure analysis can be made extremely easy.

  FIG. 3 is a diagram for explaining the details of the freeze frame data FFD in FIG.

  Referring to FIG. 3, freeze frame data FFD (i) per set is composed of a plurality of data. As described above, the plurality of data are respectively input from the engine start abnormality detection unit 10 (timer 14 and counter 16), the engine speed sensor 30 and the various sensors 40 shown in FIG. The data is written into the non-volatile memory 28 by the CPU 24 every predetermined unit time Δt.

  The freeze frame data FFD (i) includes the following four data (data 1 to data 4) as data necessary for analyzing a failure due to an abnormal engine start.

  Specifically, data 1 corresponds to the engine speed MRNE. The engine speed MRNE is detected by an engine speed sensor 30 shown in FIG.

  Next, the data 2 corresponds to a period in which the starter is on and the engine speed MRNE is lower than a predetermined speed. This period is counted by the timer 14 of the engine start abnormality detector 10 in FIG. The timer 14 counts this period each time the driver turns the ignition key to the engine start position and turns on the starter.

  Further, data 3 corresponds to the number of times the starter is turned on from the time when the vehicle system is activated until the time when the engine start abnormality is detected. This is counted by the counter 16 of the engine start abnormality detection unit 10 of FIG.

  Finally, the data 4 corresponds to the travel distance in one trip immediately before the current vehicle system activation. One trip refers to a period from when the ignition key is turned to the on position until the ignition key is returned to the off position.

  The travel distance is obtained by the CPU 24 integrating the vehicle speed included in the signals from the various sensors 40 by a predetermined unit time Δt to convert the travel speed per unit time Δt, and integrating the converted travel distance. The travel distance obtained by the integration is worth the travel distance of one trip at the end of the period corresponding to one trip. When the next vehicle system is activated (corresponding to the start of the next one trip), this travel distance becomes the travel distance of the previous trip.

  As described with reference to FIG. 2, freeze frame data FFD (i−2) to FFD (i + 2) including these data 1 to 4 before and after the abnormality detection of engine start (t = T) A set of data groups is configured. That is, from the engine speed MRNE of data 1, the engine speed MRNE before and after the engine start abnormality is detected. Further, from the period in which the starter of data 2 is in the ON state and the engine speed MRNE is lower than the predetermined speed, it can be understood how long the starter has been turned on in one engine start operation. The number of times the starter is turned on from the time of starting the vehicle system in the data 3 to the time of detecting the engine start abnormality is the number of times the driver turns on the starter from the time of starting the vehicle system to the time of detecting the engine start abnormality. I understand.

  Finally, the travel distance of the previous trip in data 4 shows how the driver was traveling immediately before the engine start abnormality occurred. That is, it becomes a clue to know the state of the engine when the engine is started.

  These are all data representing the usage status of the driver and are necessary for analyzing the cause of the failure. Therefore, according to the present invention, since the usage status of the vehicle can be acquired as objective data, it is possible to easily and efficiently analyze a failure due to an engine start failure.

  The freeze frame data FFD in FIG. 3 further includes vehicle speed, throttle opening degree, water temperature, and the like as data 5 and later. These indicate vehicle conditions when other abnormal events such as engine misfire and water temperature abnormality occur, and are effective data for failure analysis.

  FIG. 4 is a flowchart for explaining an engine start abnormality detecting operation and a data storing operation performed by the vehicle failure diagnosis apparatus according to the present invention.

  Referring to FIG. 4, first, when the ignition key is turned to the on position and the vehicle system is activated (step S01), engine start abnormality determination unit 12 determines whether or not the starter is on ( Step S02). At this time, when determining that the starter is turned on, the engine start abnormality determination unit 12 determines whether or not the previous starter is turned off (step S03). Then, the engine start abnormality determination unit 12 determines that the starter is newly turned on this time when the previous starter is turned off, and increments the count value of the counter 16 that counts the number of times the starter is turned on ( Step S04). The counter 16 outputs the count result to the freeze frame data storage unit 20. On the other hand, in step S03, when the previous starter is not turned off, engine start abnormality determination unit 12 determines that the starter-on operation performed last time is still continued, and maintains the count value of counter 16. To do.

  Next, when the starter is turned on to rotate and cranking of the engine is started by the rotation of the starter, the engine start abnormality determination unit 12 receives the engine speed MRNE from the engine speed sensor 30. Then, the engine start abnormality determination unit 12 performs a coincidence comparison operation between the engine rotational speed MRNE and a predetermined rotational speed, and determines whether or not the engine is in a complete explosion state based on the comparison result (step S05). . At this time, if the engine speed MRNE is equal to or higher than the predetermined speed, the engine start abnormality determining unit 12 determines that the engine start is normal (step S11).

  On the other hand, if the engine speed MRNE falls below a predetermined speed, the engine start abnormality determination unit 12 starts the timer 14 (step S06).

  The timer 14 is activated in response to an instruction from the engine start abnormality determination unit 12, and measures a period in which the starter is in an on state and the engine rotational speed MRNE is lower than a predetermined rotational speed. Then, the timing information is output to the engine start abnormality determination unit 12 and also output to the freeze frame data storage unit 20.

  Next, the engine start abnormality determination unit 12 has a timed period (= a period in which the starter is on and the engine speed MRNE is lower than a predetermined speed) longer than a predetermined period. Whether or not (step S07).

  At this time, if the measured time period is longer than the predetermined period, the engine start abnormality determining unit 12 determines that the engine has not reached the complete explosion state even though the driver has kept the starter on for the predetermined period. It is determined that the engine start is abnormal. When the engine start abnormality determination unit 12 determines the engine start abnormality, the engine start abnormality determination unit 12 outputs the determination result signal to the display unit and also outputs it to the freeze frame data storage unit 20 (step S08).

  In the freeze frame data storage unit 20, a group of freeze frame data FFD stored in the nonvolatile memory 28 is continuously updated every predetermined unit time Δt from the start of the vehicle system. When the CPU 24 receives a determination result signal instructing that the engine start is abnormal from the engine start abnormality determination unit 12, the CPU 24 stops writing to the nonvolatile memory 28 after updating one set of data groups twice. (Step S09).

  As a result, the non-volatile memory 28 stores freeze frame data FFD (i−2) to FFD (i + 2) before and after the engine start abnormality is detected as data indicating the vehicle status before and after the engine start abnormality is detected. (Step S10).

  On the other hand, in step S07, the engine start abnormality determination unit 12 determines that the period during which the driver keeps turning on the starter is the period necessary to complete the engine explosion if the timed period is equal to or shorter than the predetermined period. It is determined that the engine is not satisfied, that is, it is determined that there is a cause in the driver's key operation, and it is determined that the engine start is normal. When the engine start abnormality determination unit 12 determines normality / abnormality of engine start, it outputs the determination result signal to the freeze frame data storage unit 20 (step S11). The counter 16 and the timer 14 reset the count result and the time measurement result, respectively, when the engine start abnormality determination unit 12 determines that the engine start is normal (steps S12 and S13).

  As described above, according to the embodiment of the present invention, failure analysis of engine start failure according to the use state of the vehicle is possible, so that the number of man-hours required for analysis is greatly reduced and repairs can be performed quickly. Can do.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is applicable to a vehicle failure diagnosis apparatus and a vehicle equipped with the same.

1 is a schematic block diagram of a vehicle failure diagnosis apparatus according to an embodiment of the present invention. 3 is a timing chart for explaining freeze frame data stored in the nonvolatile memory of FIG. 1. It is a figure for demonstrating the detail of the freeze frame data FFD in FIG. 5 is a flowchart for explaining an engine start abnormality detection operation and a data storage operation performed by the vehicle failure diagnosis apparatus according to the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Engine start abnormality detection part, 12 Engine start abnormality determination part, 14 Timer, 16 counter, 20 Freeze frame data storage part, 22 Input interface part, 23 Bus, 24 CPU, 26 Timer, 28 Non-volatile memory, 30 Engine speed Sensors, 40 Various sensors, 110 connectors, 120 diagnostic tools, 1000 vehicles.

Claims (7)

A starting abnormality detecting means for detecting a starting abnormality of the internal combustion engine;
Data storage means for storing data necessary for analysis of failure due to the start abnormality,
The start abnormality detection means outputs a detection result signal indicating that the start abnormality is detected to the data storage means ,
The data storage means includes
Storage means for acquiring and storing the data every predetermined unit time ;
Receiving the detection result signal, including control means for stopping the storage means from acquiring the data after elapse of at least one predetermined unit time from the detection of the start abnormality ,
The data includes data indicating the usage status of the driver's vehicle before and after the detection of the start abnormality ,
The data indicating the usage status of the vehicle is
The number of times the starter is turned on from the time of starting the vehicle system to the time of detecting the start abnormality ,
When the start abnormality is detected, the rotational speed of the internal combustion engine when the starter is turned off ,
A vehicle fault diagnosis device including at least one of a travel distance of a trip immediately before starting the vehicle system .   The vehicle failure diagnosis apparatus according to claim 1, wherein the data stored in the data storage unit is read out of the vehicle by a data reading unit. The data indicating the usage status of the vehicle is
Further comprising a period in which the starter is continued to be turned on per-on operation of one of the starter, vehicle fault diagnostic apparatus according to claim 1 or 2. The start abnormality detecting means detects the start abnormality when the rotational speed of the internal combustion engine is equal to or lower than a predetermined rotational speed even though the starter is kept on for a predetermined period. Item 4. The vehicle failure diagnosis device according to Item 3 . The vehicle failure diagnosis device according to claim 4 , wherein the start abnormality detection unit is set so that the predetermined period becomes longer as the engine temperature of the internal combustion engine becomes lower. The starting abnormality detecting means is
Timer means for counting a period during which the starter is kept on and the rotational speed of the internal combustion engine is equal to or lower than the predetermined rotational speed;
A start abnormality determining means for determining that the start abnormality is based on the timed period exceeding the predetermined period and outputting the detection result signal;
The vehicle fault diagnosis apparatus according to claim 5 , further comprising a counter unit that counts the number of times the starter is turned on from when the vehicle system is activated until when the start abnormality is detected. The timer means outputs to the data storage means a period during which the measured starter is turned on and the speed of the internal combustion engine is equal to or less than a predetermined speed.
The vehicle failure diagnosis apparatus according to claim 6 , wherein the counter unit outputs the counted number of times the starter is turned on to the data storage unit.

Images