Signal Missing
Signal missing
Checking the function
Check the fuse for power supply to the Driver Information Module (DIM).
For information about fuses, see the wiring diagram.
Check the power supply for the driver information module (DIM) by switching on the ignition.
The lighting in the instrument panel must light up.
Is the function OK?
Yes - Checking communication
No - Checking the power supply and ground
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Checking the power supply and ground
Check fuse F18 in the fusebox in the engine compartment.
Check the fuse in the central electronic module (CEM) for the supply relay (same relay as for the interior lighting) to the driver information module (DIM).
Note! If the fuse has blown, check the circuit after the fuse before replacing the fuse. Check for a short-circuit to ground. Then replace the fuse. For further information about the circuit after the fuse, refer to the appropriate wiring diagram.
Check the cable between the fusebox and the power supply relay for the driver information module (DIM). Check for an open-circuit.
Check the cable between the power supply relay and the driver information module (DIM). Check for an open-circuit.
Check the ground lead between the driver information module (DIM) and the ground terminal. Check for an open-circuit. Also check the ground terminal. Check for contact resistance and oxidation.
Check the connector and the cable harness behind the dashboard. Check for damage.
Remedy as necessary.
Other information
- For connecting breakout box to Central Electronic Module (CEM): Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- To connect the breakout box to the driver information module (DIM), see: Connecting the breakout box Connecting the Breakout Box, Driver Information Module (DIM)
Connecting the breakout box Connecting the Breakout Box, Driver Information Module (DIM)
- For a signal description for the central electronic module (CEM),
- Signal specification Signal Specification, Driver Information Module (DIM)
- Checking wiring and terminals Checking Wiring and Terminals
Was a fault detected?
Yes - Verification
No - Checking status and activating the interior lighting relay
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Checking communication
Hint: The CAN communication with the control module is probably OK if the control module ID can be read off. In that case the fault is probably intermittent and will then be more difficult to trace.
Try to communicate with the driver information module (DIM) by reading off the control module ID.
Click the symbol for VCT2000 to begin reading off.
Continue - Signal missing
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Signal missing
No Fault Found - No Fault Found
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Check the power supply for the driver information module (DIM) by switching on the ignition.
The lighting in the instrument panel must light up.
If the above works, start the engine and check that the indicator lamps go out correctly and that the tachometer reacts to changes in engine speed.
Is function OK?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Attempt New Test - Checking the function
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Checking status and activating the interior lighting relay
Hint: If the power supply to the driver information module (DIM) does not function, this can be due to the interior lighting relay in the central electronic module (CEM) not functioning. The relay powers a number of nodes in the car.
- Ignition on.
Start the smart tool to check the status and activation of the interior lighting relay by clicking on the VCT2000 symbol.
There is an internal fault in the central electronic module (CEM) if the relay is not activated and cannot be activated. In this case, the central electronic module (CEM) must be replaced.
Other information
Was a fault detected?
Yes - Verification
No - Signal missing
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