Signal Too High. Permanent Fault

Signal too high. Permanent fault

Checking the relay




- Ignition off.
Check that relay 2/29 is installed correctly. At the same time check the relay connections, in particular 2/29 #2, for a short circuit to voltage supply as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Additional information:
- To replace relay, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing.
- To connect the test box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM).













Is there a fault?

Yes - Verification

No - Replacing the component

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Replacing the component
Replace relay as described in Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing.


Continue - Verification

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Verification




Verification

Verification

Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Connect connectors, install components etc.
- Ignition on.
Activate the heater by clicking on the symbol for VCT 2000.

Additional information:
- For information on how the heater works in operation, see Engine coolant heater, test running Engine Coolant Heater, Test Running.
- For a description of the parameters, see Description of parameters Description of Parameters.
- For a description of activations, see Activating components/functions Activating Components/Functions.





Does it work?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Trouble-shooting information

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Trouble-shooting 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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking the relay

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