DE102017110624A1 - DIAGNOSTIC DEVICE AND MANUFACTURING PROCESS - Google Patents

Abstract

The present invention discloses a diagnostic device (100, 200) for diagnosing switching elements (101, 102, 201, 202, 220, 221) in a vehicle, comprising a pluggable resistance module (104, 105, 204, 205, 222, 223) for each of the switching elements (101, 102, 201, 202, 220, 221), a diagnostic device (115, 215), which is formed, a current (117, 118, 217, 218) through the resistance modules (104, 105, 204, 205, 222, 223) and to diagnose the function of the respective switching element (101, 102, 201, 202, 220, 221) based on the respectively detected current (117, 118, 217, 218), and a module carrier (103 ) which is designed to receive the resistor modules (104, 105, 204, 205, 222, 223) and an input terminal (106, 107) of the respective resistor module (104, 105, 204, 205, 222, 223) with the corresponding switching element ( 101, 102, 201, 202, 220, 221) and an output terminal (108, 109) of the respective resistor module (104, 105, 204 , 205, 222, 223) to be coupled to the diagnostic device (115, 215). Furthermore, the present invention discloses a corresponding manufacturing method.

Description

Technical area

The present invention relates to a diagnostic device for diagnosing switching elements in a vehicle. Furthermore, the invention relates to a corresponding manufacturing method.

State of the art

The present invention will be described below mainly in connection with motor vehicles. It is understood, however, that the present invention can be used in any application in which switched electrical supply lines must be diagnosed.

In modern vehicles, a variety of electrical consumers is used. The consumers can be permanently connected to the vehicle battery or supplied via switched supply lines, so-called terminals, with electrical energy. The names of the terminals may be used in automotive electrical equipment e.g. An auxiliary number or a letter to simplify the connection of lines and the fault diagnosis using a wiring diagram in motor vehicles. For example, the clamp 30 is usually permanently connected to the positive pole of the vehicle battery, while the clamp 30g is e.g. can be a switched positive line.

The switched terminals are usually switched via vehicle relays, e.g. can be arranged in a fuse and relay holder. The control of the relays may be e.g. via a arranged on a power distributor or fuse carrier control module. This solution is not very flexible.

Description of the invention

An object of the invention is therefore to diagnose a switched current distribution in a vehicle using structurally simple means possible.

The object is solved by the subject matters of the independent claims. Advantageous developments of the invention are specified in the dependent claims, the description and the accompanying figures. In particular, the independent claims of a claim category can also be developed analogously to the dependent claims of another claim category.

A diagnostic device according to the invention for the diagnosis of switching elements in a vehicle has a pluggable resistance module for each of the switching elements. Furthermore, the diagnostic device has a diagnostic device, which is designed to detect a current through the resistor modules and to diagnose the function of the respective switching element based on the respectively detected current. Finally, the diagnostic device has a module carrier, which is designed to receive the resistor modules and to couple input terminals of the resistor modules with the corresponding switching elements and to couple output terminals of the resistance modules with the diagnostic device.

An inventive manufacturing method for a diagnostic device for the diagnosis of switching elements in a vehicle comprises the following steps: providing a pluggable resistor module for each of the switching elements, providing a diagnostic device which is designed to detect a current through the resistor modules and based on the respectively detected current diagnosing the function of the respective switching element, arranging the resistance modules in a module carrier adapted to receive the resistance modules, coupling input terminals of the resistance modules to the corresponding switching elements, and coupling output terminals of the resistance modules to the diagnostic device.

As already explained above, the activation of relays for switched terminals in vehicles, e.g. be realized on a power distribution. Usually, the diagnosis of such relay is also realized on the power distribution with permanently soldered components.

The present invention is now based on the recognition that firmly soldered components allow only a few flexible arrangements. Therefore, the present invention provides that the individual units for diagnosing the switching elements, e.g. of vehicle relay, to be arranged separately.

The resistance modules can couple an output of the respective switching element via a predetermined resistance with the diagnostic device. If a switching element is switched on, that is, controlled, then a current flows through the resistance module to the diagnostic device, which can be evaluated.

The module carrier may e.g. be a backup and / or relay carrier in a vehicle. Such module carriers may be located at different locations in the vehicle, e.g. be arranged in the engine compartment, in the interior and / or in the trunk. The resistance modules can consequently be arranged very flexibly on one of the module carriers present in the vehicle.

The individual resistance modules can be coupled to the diagnostic device, for example via a cable harness or wiring harness connected to the module carrier. Cable strands or harnesses are custom made for a vehicle or even for each variant of a vehicle. Consequently, consideration can be given to the position of the diagnostic device in the manufacture of such a cable harness.

The diagnostic device can therefore be arranged very flexibly at any suitable location in the vehicle. In particular, the position of the diagnostic device is independent of the position of the module carrier or the resistor modules.

If the module carrier is also designed as a relay carrier, it also houses the switching elements, the individual resistance modules can furthermore be arranged very close to the respective switching elements.

In one embodiment, the diagnostic device may be configured to detect, for diagnosing one of the switching elements, whether a current is flowing through the respective switching element when the respective switching element is turned on or turned on.

As already explained, the resistance modules couple an output of the respective switching element via a predetermined resistance with the diagnostic device. If the diagnostic device has information about the state of the switching elements, the diagnostic device can thus use the current flow to determine whether the respective switching element is functioning properly. If the diagnostic device does not have this information, the diagnostic device can provide information about the current flow through the respective switching elements, e.g. to a controller in the vehicle, which has the necessary information.

In one embodiment, the resistor modules may each comprise a resistor and a diode arranged in series with the resistor.

The resistors limit the flow of current from the vehicle battery or the alternator via the switching elements in the diagnostic device. With the help of the diode, a flow of current back to the respective switching element or supplied by this electrical consumers can be prevented.

The resistor and the diode may each be implemented as discrete leaded components, e.g. soldered directly to each other and placed in a housing. Alternatively, the resistor and the diode may be e.g. be designed as THT (Through-Hole Technology) or SMD (Surface Mounted Devices) components. A carrier board can receive the resistor and the diode and also make contact with the respective input and output terminals.

In one embodiment, the module carrier may include electrical connections configured to electrically couple at least two of the resistor modules in parallel with a single diagnostic input of the diagnostic device.

If a plurality of the resistance modules are electrically coupled in parallel with a single diagnostic input of the diagnostic device, the diagnostic device can simultaneously diagnose a plurality of the switching elements via this individual diagnostic input. The parallel connection can be e.g. via a cable harness or via the module carrier. For example, the module carrier may have a stamped grid, which is enclosed by an injection molding. The lead frame can provide corresponding parallel connection.

In one embodiment, the resistances of the respective resistance modules connected electrically in parallel may have different resistance values.

In order to be able to distinguish which of the switching elements are turned on in the case of a simultaneous diagnosis of a plurality of switching elements via a single diagnostic input, the diagnostic device can be used, for example detect the total current through the resistor modules.

In a parallel connection of the resistor modules, the currents add through the individual resistor modules at the diagnostic input. If each of the resistance modules connected in parallel has a different resistance value, the individual resistance modules contribute different proportions to the total current at the diagnostic input.

For example, one of the resistor modules may contribute 1/7, a second 2/7 and a third 4/7 of the total current. So detects the diagnostic device only 1/7 of the total current, the first switching element is turned on. If the diagnostic device detects 2/7 of the total current, the second switching element is switched through. Detects the diagnostic device 4/7 of the total current, the third switching element is turned on. If the diagnostic device detects 3/7 of the total current, the first and the second switching element are switched through. Detects the diagnostic device 5/7 of the total current, are the first and the third switching element connected through. Detects the diagnostic device 6/7 of the total current, the second and the third switching element are turned on. Finally, when the diagnostic device detects 7/7 of the total current, all three switching elements are turned on.

The individual resistors in the resistance modules can consequently be dimensioned in such a way that unambiguous current values are set in the diagnostic device in all drive combinations. In doing so, usually all switching elements are taken from a common source, e.g. the vehicle battery or the alternator supplied.

In one embodiment, the resistance modules can be designed mechanically externally as plug-in fuses, in particular as flat fuses.

The resistance modules thus have housings which are externally identical to housings of plug-in fuses. Such plug fuses, especially standard fuses, are commonly used e.g. used in motor vehicles and may e.g. as a low mini-fuse (low-profile mini-fuse), as mini-fuse (mini fuse), as a standard fuse (regular ATO fuse) or as a maxi-fuse (maxi fuse) be formed. Possible housing variants are also shown in the standard ISO 8820-3: 2010 or ISO 8820-3: 2015. It is understood that the resistance modules may have a housing analogous to each of the above-mentioned types of backup. Instead of e.g. of a fusible wire can be in the respective housing so e.g. a resistor and a diode are arranged.

The resistance modules thus correspond mechanically, ie from their external shape, conventional automotive fuses and can be used in conventional fuse holders, which consequently serves as a module carrier. The connection of the individual resistor modules to the diagnostic device can be as already explained above, e.g. via a wiring harness of the respective vehicle. The parallel connection of individual resistance modules can also take place in the cable harness via corresponding line connectors.

In one embodiment, two resistor modules may each be arranged in a fuse box with three electrical contacts.

For example, so-called "Micro3" fuses have three electrical contacts, of which the middle contact is a common contact. Such a construction can therefore be e.g. be used to connect two resistor modules in parallel and to arrange in a single fuse box. Each of the outer contacts is in each case electrically coupled to one of the switching elements and the middle contact is fed to the diagnostic input of the diagnostic device. Thus, two switching elements can be coupled to the diagnostic device very space-saving two resistor modules with only one plug housing.

In one embodiment, the diagnostic device for each of the switching elements having a control output, which is coupled to a control input of the respective switching element.

The diagnostic device can therefore be used not only for diagnosis but also for driving the switching elements. In the diagnosis of the individual switching elements of the set state of the switching elements of the diagnostic device is therefore known. The diagnostic device can therefore not only detect the current through the resistor modules but also evaluate whether the individual switching elements are correctly controlled.

list of figures

• 1 ein Blockschaltbild eines Ausführungsbeispiels einer Diagnosevorrichtung gemäß der vorliegenden Erfindung;
• 2 ein Blockschaltbild eines weiteren Ausführungsbeispiels einer Diagnosevorrichtung gemäß der vorliegenden Erfindung; und
• 3 ein Ablaufdiagramm eines Ausführungsbeispiels eines Herstellverfahrens gemäß der vorliegenden Erfindung.

Hereinafter, advantageous embodiments of the invention will be explained with reference to the accompanying drawings. Show it:

• 1 a block diagram of an embodiment of a diagnostic device according to the present invention;
• 2 a block diagram of another embodiment of a diagnostic device according to the present invention; and
• 3 a flow chart of an embodiment of a manufacturing method according to the present invention.

The figures are merely schematic representations and serve only to illustrate the invention. Identical or equivalent elements are consistently provided with the same reference numerals.

Detailed description

1 shows a block diagram of a diagnostic device 100 for the diagnosis of switching elements 101 . 102 , It is understood that the two switching elements 101 . 102 merely by way of example, and any number of switching elements with the diagnostic device 100 can be diagnosed. The diagnostic device 100 points for each of the switching elements 101 . 102 a resistance module 104 . 105 on. The resistance modules 104 . 105 the diagnostic device 100 have housing, which resemble those of flat fuses for vehicles. The resistance modules 104 . 105 are in a module carrier 103 arranged, which may be formed as a vehicle fuse carrier in a vehicle, for example. It is understood that other types of housing are possible. For example, a plurality of resistance modules, for example, can also be arranged in a relay housing. Such housings may have a plurality of terminals, eg 3 - 8, and therefore accommodate 2-7 resistor modules in parallel.

One input connection each 106 . 107 the resistance modules 104 . 105 is with an output of the corresponding switching element 101 . 102 coupled. In the resistor modules 104 . 105 are between the respective input terminal 106 . 107 and the corresponding output port 108 . 109 one resistance each 110 . 111 and a diode 112 . 113 electrically connected in series. The diodes 112 . 113 lie between the respective input terminal 106 . 107 and the corresponding output port 108 . 109 in the forward direction. The output connections 108 . 109 are with a diagnostic input 116 a diagnostic device 115 coupled. The resistors 110 . 111 and the diodes 112 . 113 For example, as SMD components can each be arranged on a carrier board, which with the corresponding input terminal 106 . 107 and the corresponding output port 108 . 109 is soldered. A discrete structure is also possible.

Will be one of the switching elements 101 . 102 on or through, the supply voltage is 150 over the resistances 110 . 111 and diodes 112 . 113 the resistance modules 104 . 105 at. Consequently, a current flows 117 . 118 over the respective switching element 101 . 102 into the diagnostic input 116 , The diagnostic device 115 can by the current 117 . 118 Diagnose if the respective switching element 101 . 102 is turned on or not. For current measurement can in the diagnostic device 115 For example, be provided a shunt resistor. The resistors 110 . 111 can depending on the desired current 117 . 118 and the input voltage 150 be dimensioned. At a usual vehicle input voltage 150 from 12V can the resistors 110 . 111 eg as 10 kQ resistors are dimensioned. This leads to a current 117 . 118 of 1.2 mA. In relation to 2 explains why the resistors 110 . 111 also have different sizes.

Although not shown, it is understood that parallel to the resistor modules 104 . 105 the actual loads on the switching elements 101 . 102 can be connected. Such loads may be, for example, electrical consumers in a vehicle.

The diagnostic device 115 For example, it may be a controller in a vehicle. The diagnostic device 115 can also be coupled via a bus interface with other vehicle systems. Possible bus interfaces are, for example, LIN bus, CAN bus, Flexray bus, Ethernet or the like. The diagnostic device 115 can from these systems, for example, the information about the current drive state of the individual switching elements 101 . 102 get and measured with the current 117 . 118 compare. For example, a current flows, although the respective switching element 101 . 102 is not controlled, there is an error. Likewise, there is an error when no power 117 . 118 flows, although the respective switching element is turned on.

Alternatively, the diagnostic device 115 For example, have a control output (not shown separately), via which the diagnostic device 115 the individual switching elements 101 . 102 can drive. The diagnostic device 115 can also receive control statements via a bus interface, for example, which the diagnostic device 115 instruct certain switching elements 101 . 102 by heading. The diagnostic device 115 can therefore perform both control and diagnostic functions.

2 shows a block diagram of another diagnostic device 200 , The diagnostic device 200 has a diagnostic device 215 on, which has two diagnostic inputs 216 . 228 features. In contrast to 1 is each of the diagnostic inputs 216 . 228 with two resistor modules 204 . 205 . 222 . 223 coupled, the electrically parallel to the respective diagnostic input 216 . 228 are connected. Each of the resistor modules 204 . 205 . 222 . 223 is at the output of a relay 201 . 202 . 220 . 221 connected to the respective output or the respective relay 201 . 202 . 220 . 221 in the diagnostic facility 215 to be able to diagnose. Furthermore, as already mentioned above, further electrical consumers can be connected in parallel with the resistance modules 204 . 205 . 222 . 223 be arranged (not shown).

Will one of the relays 201 . 202 . 220 . 221 via his control input 230 . 231 . 232 . 233 activated, ie closed, is the supply voltage 250 at the respective resistance module 204 . 205 . 222 . 223 at. Consequently, a current flows through the respective resistance module 204 . 205 . 222 . 223 , Because two of the resistor modules 204 . 205 . 222 . 223 parallel to one of the diagnostic inputs 216 . 228 are connected, add the currents through the resistor modules 204 . 205 . 222 . 223 flow at the respective diagnostic input 216 . 228 to that in the diagnostic facility 215 current to be measured 217 . 218 ,

To be in the diagnostic device 215 to be able to distinguish which of the parallel switched relays 201 . 202 . 220 . 221 is controlled by each, the parallel resistors 210 . 211 . 224 . 225 each have different resistance values. This allows the diagnostic device 215 the individual resistor modules 204 . 205 . 222 . 223 based on the measured current 217 . 218 to distinguish, as already explained above.

Although in 2 only two resistor modules each 204 . 205 . 222 . 223 parallel to one of the diagnostic inputs 216 . 228 are connected, it goes without saying that any number of resistor modules 204 . 205 . 222 . 223 to a diagnostic input 216 . 228 can be connected. The number of possible parallel resistor modules 204 . 205 . 222 . 223 is only due to the maximum current absorption capacity of the respective diagnostic input 216 . 228 and the resolution of the current measurement in the diagnostic device 215 limited.

For a better understanding, in the following the description of the device related 1 and 2 used reference numerals for the description of the process-related 3 maintained.

3 shows a flowchart of a manufacturing method for a diagnostic device 100 . 200 for the diagnosis of switching elements 101 . 102 . 201 . 202 . 220 . 221 in a vehicle.

The manufacturing process sees in a first step S1 providing a pluggable resistance module 104 . 105 . 204 . 205 . 222 . 223 for each of the switching elements 101 . 102 . 201 . 202 . 220 . 221 in front. In a second step S2 the provision of a diagnostic device 115 . 215 provided, which is formed, a current 117 . 118 . 217 . 218 over the resistor modules 104 . 105 . 204 . 205 . 222 . 223 to capture and based on the current detected 117 . 118 . 217 . 218 the function of the respective switching element 101 . 102 . 201 . 202 . 220 . 221 to diagnose. In a third step S3 of arranging become the resistor modules 104 . 105 . 204 . 205 . 222 . 223 in a module carrier 103 arranged, which is formed, the resistance modules 104 . 105 . 204 . 205 . 222 . 223 take. In a fourth step S4 the coupling becomes the input terminals 106 . 107 the resistance modules 104 . 105 . 204 . 205 . 222 . 223 with the corresponding switching element 101 . 102 . 201 . 202 . 220 . 221 coupled. Finally, in a fifth step S5 coupling the output terminals 108 . 109 the resistance modules 104 . 105 . 204 . 205 . 222 . 223 with the diagnostic device 115 . 215 coupled.

The manufacturing method may further include arranging a current measuring device in the diagnostic device 115 . 215 which is configured to diagnose one of the switching elements 101 . 102 . 201 . 202 . 220 . 221 to capture if a stream 117 . 118 . 217 . 218 through the respective switching element 101 . 102 . 201 . 202 . 220 . 221 flows when the respective switching element 101 . 102 . 201 . 202 . 220 . 221 is turned on.

Furthermore, in the resistor modules 104 . 105 . 204 . 205 . 222 . 223 one resistance each 110 . 111 . 210 . 211 . 224 . 225 electrically in series with a diode 112 . 113 . 212 . 213 . 226 . 227 to be ordered.

There may also be at least two of the resistor modules 104 . 105 . 204 . 205 . 222 . 223 with electrical parallel with a single diagnostic input 116 . 216 . 228 the diagnostic device 115 . 215 get connected. When coupling one resistor at a time 110 . 111 . 210 . 211 . 224 . 225 with a diode 112 . 113 . 212 . 213 . 226 . 227 can the resistors of each electrically connected in parallel resistor modules 104 . 105 . 204 . 205 . 222 . 223 be provided with different resistance values.

The resistance modules 104 . 105 . 204 . 205 . 222 . 223 can be mechanically outwardly formed as plug-in fuses, especially as flat fuses. In each case, two of the resistor modules 104 . 105 . 204 . 205 . 222 . 223 are each arranged in a plug fuse housing with three electrical contacts.

In the diagnostic device 115 . 215 can be used to control the switching elements 101 . 102 . 201 . 202 . 220 . 221 for each of the switching elements 101 . 102 . 201 . 202 . 220 . 221 In addition, a control output can be provided, which with a control input 230 . 231 . 232 . 233 of the respective switching element 101 . 102 . 201 . 202 . 220 . 221 can be coupled.

As the devices and methods described in detail above are exemplary embodiments, they may be readily modified by one skilled in the art to a wide extent without departing from the scope of the invention. In particular, the mechanical arrangements and the size ratios of the individual elements to each other are merely exemplary

LIST OF REFERENCE NUMBERS

100, 200

diagnostic device

101, 102, 201, 202, 220, 221

switching element

103

module carrier

104, 105, 204, 205, 222, 223

modulus

106, 107

input port

108, 109

output port

110, 111, 210, 211, 224, 225

resistance

112, 113, 212, 213, 226, 227

diode

115, 215

diagnostic device

116, 216, 228

diagnostic input

117,118,217,218

electricity

230, 231, 232, 233

control input

150, 250

supply voltage

S1 - S5

steps

Claims (15)

Diagnostic device (100, 200) for diagnosing shift elements (101, 102, 201, 202, 220, 221) in a vehicle, comprising: a pluggable resistance module (104, 105, 204, 205, 222, 223) for each of the switching elements (101, 102, 201, 202, 220, 221), a diagnostic device (115, 215) which is designed to detect a current (117, 118, 217, 218) through the resistance modules (104, 105, 204, 205, 222, 223) and based on the respectively detected current (117 , 118, 217, 218) to diagnose the function of the respective switching element (101, 102, 201, 202, 220, 221), and a module carrier (103) which is adapted to receive the resistor modules (104, 105, 204, 205, 222, 223) and input terminals (106, 107) of the resistor modules (104, 105, 204, 205, 222, 223) with the corresponding Coupling switching element (101, 102, 201, 202, 220, 221) and the output terminals (108, 109) of the resistance modules (104, 105, 204, 205, 222, 223) to the diagnostic device (115, 215) to couple. Diagnostic device (100, 200) after Claim 1 in that the diagnostic device (115, 215) is designed to detect, for diagnosing one of the switching elements (101, 102, 201, 202, 220, 221), whether a current (117, 118, 217, 218) is generated by the respective switching element ( 101, 102, 201, 202, 220, 221) flows when the respective switching element (101, 102, 201, 202, 220, 221) is turned on. The diagnostic device (100, 200) of any of the preceding claims, wherein the resistor modules (104, 105, 204, 205, 222, 223) each include a resistor (110, 111, 210, 211, 224, 225) and one in series with the Resistor (110, 111, 210, 211, 224, 225) arranged diode (112, 113, 212, 213, 226, 227). Diagnostic device (100, 200) according to one of the preceding claims, wherein the module carrier (103) comprises electrical connections, which are formed, at least two of the resistor modules (104, 105, 204, 205, 222, 223) electrically in parallel with a single diagnostic input ( 116, 216, 228) of the diagnostic device (115, 215). Diagnostic device (100, 200) according to Claims 3 and 4 , Wherein the resistors of the respectively electrically parallel connected resistor modules (104, 105, 204, 205, 222, 223) have different resistance values. Diagnostic device (100, 200) according to one of the preceding claims, wherein the resistance modules (104, 105, 204, 205, 222, 223) are mechanically outwardly formed as plug-in fuses, in particular as flat fuses. Diagnostic device (100, 200) after Claim 6 , wherein two resistance modules (104, 105, 204, 205, 222, 223) are each arranged in a plug fuse housing with three electrical contacts. Diagnostic device (100, 200) according to one of the preceding claims, wherein the diagnostic device (115, 215) for each of the switching elements (101, 102, 201, 202, 220, 221) has a control output which is connected to a control input (230, 231, 232, 233) of the respective switching element (101, 102, 201, 202, 220, 221) is coupled. A manufacturing method for a diagnostic device (100, 200) for diagnosing shift elements (101, 102, 201, 202, 220, 221) in a vehicle, comprising the steps of: Providing (S1) a pluggable resistance module (104, 105, 204, 205, 222, 223) for each of the switching elements (101, 102, 201, 202, 220, 221), Providing (S2) a diagnostic device (115, 215) configured to detect a current (117, 118, 217, 218) across the resistor modules (104, 105, 204, 205, 222, 223) and based on the respective one detected current (117, 118, 217, 218) to diagnose the function of the respective switching element (101, 102, 201, 202, 220, 221), Arranging (S3) the resistance modules (104, 105, 204, 205, 222, 223) in a module carrier (103) which is designed to accommodate the resistance modules (104, 105, 204, 205, 222, 223), Coupling (S4) input terminals (106, 107) of the resistor modules (104, 105, 204, 205, 222, 223) to the respective switching elements (101, 102, 201, 202, 220, 221), and Coupling (S5) output terminals (108, 109) of the resistor modules (104, 105, 204, 205, 222, 223) to the diagnostic device (115, 215). Production method according to Claim 9 comprising arranging a current measuring device in the diagnostic device (115, 215), which is designed to detect, for diagnosing one of the switching elements (101, 102, 201, 202, 220, 221), whether a current (117, 118, 217, 218) flows through the respective switching element (101, 102, 201, 202, 220, 221) when the respective switching element (101, 102, 201, 202, 220, 221) is turned on. Production method according to one of the previous Claims 9 and 10 comprising coupling each of a resistor (110, 111, 210, 211, 224, 225) and a diode (112, 113, 212, 213, 226, 227) electrically in series in the resistor modules (104, 105, 204, 205 , 222, 223). Production method according to one of the previous Claims 9 to 11 comprising electrically connecting at least two of the resistor modules (104, 105, 204, 205, 222, 223) to a single diagnostic input (116, 216, 228) of the diagnostic device (115, 215). Manufacturing method according to the Claims 11 and 12 in which, when coupling in each case one resistor (110, 111, 210, 211, 224, 225) and one diode (112, 113, 212, 213, 226, 227), the resistances of the resistance modules (104, 105, 204 , 205, 222, 223) with different resistance values. Production method according to one of the previous Claims 9 to 13 , wherein the resistance modules (104, 105, 204, 205, 222, 223) are mechanically externally formed as plug-in fuses, in particular as flat fuses, in particular wherein two of the resistor modules (104, 105, 204, 205, 222, 223) each in one Plug fuse housing can be arranged with three electrical contacts. Production method according to one of the previous Claims 9 to 14 in which a control output is provided in the diagnostic device (115, 215) for each of the switching elements (101, 102, 201, 202, 220, 221) which is connected to a control input (230, 231, 232, 233) of the respective switching element (101 , 102, 201, 202, 220, 221).

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