Fault-Tracing Information
Fault-tracing
Checking the power supply and ground terminal
- Ignition off.
Check the cable for voltage feed between Rain sensor module (RSM) and Central electronic module (CEM) for open circuit and short-circuiting to ground.
Check the ground lead between the Rain sensor module (RSM) and the ground connection for an open-circuit.
Check the signal cable. Check for an intermittent short-circuit to ground. Check for an intermittent open-circuit. Check for contact resistance and oxidation.
Remedy the cables as necessary.
Other information
- Connecting the breakout box For Connection Of Breakout Box To Central Electronic Module (CEM)
- Signal specification Signal Description Central Electronic Module (CEM)
- Rain sensor Service and Repair
- Checking interference in LIN-net Checking Interference In LIN-Net
- Checking wiring and terminals Checking Wiring And Terminals
Was a fault detected?
Yes - Verification
No - Checking communication
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Checking communication
- Ignition on.
Check that communications with the rain sensor module (RSM) are working by reading out the control module part number.
Click the symbol for VCT2000 to begin reading off.
Can the serial number be read off?
Yes - No Fault Found
No - Replacing the control module
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Replacing the control module
- Ignition off.
If no fault is discovered on the cables for the control module, the rain sensor module (RSM) will probably need to be replaced.
Note! Before the Rain Sensor Module (RSM) is replaced, check that no relevant diagnostic trouble codes (DTC) for the LIN network for the Interior movement sensor (IMS), Heartbeat sensor (HBS) and the Siren control module (SCM) have been generated.
Other information
- Rain sensor Service and Repair
Continue - Verification
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the power supply and ground terminal
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Verification
- Ignition off
- Reconnect cables and switches
- Ignition on.
Check rain sensor communication by reading out the control module part number.
Click the symbol for VCT2000 to begin reading off.
Can the control module ID be read out?
Yes - FAULT FOUND
No - Fault-tracing information
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