No Power Supply. Permanent Fault

No power supply. Permanent fault

Checking connectors








- Ignition off.

Note! This diagnostic trouble code (DTC) may have been stored during transportation between the factory and dealership. Check that the transit safety catch in the integrated relay/fusebox in the engine compartment is correctly connected.

- Check the climate control module connector A (30-pin) and the integrated relay/fusebox in the engine compartment. Check for contact resistance and oxidation. Remedy if necessary.
Check for damage carefully
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Wait at least 20 seconds for the control module to carry out its diagnostics
- Read off diagnostic trouble codes (DTCs).
The fault was caused by loose connections in the connector if the status of the diagnostic trouble code (DTC) has changed to intermittent.

Other information:
- To remove the control module, see Comfort module Removal and Replacement
- To access the temperature damper motor, see Temperature damper motor Temperature
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault





Has the status of the diagnostic trouble code (DTC) changed to intermittent?

Yes - FAULT FOUND

No - Checking cables

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Checking cables
Check that battery voltage is normal and that the charging system functions. When the generator (GEN) is charging the voltage should be 12-15V.
Check fuse number 8 (10 A) in the engine compartment integrated relay / fusebox.
Check the cable between climate control module terminal #A1 and fuse number 8 (10 A) in the integrated relay/fusebox in the engine compartment. Check for an open-circuit. Check for a short-circuit to ground.

Hint: For further information about the circuit after the fuse, see the Wiring Diagram Service Manual.

Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the breakout box, climate control module Connecting The Breakout Box
- The cable should have battery voltage regardless of the position of the ignition switch. For other values, see Climate control signal specifications Signal Specification
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault














Continue - Verification

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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
- Wait at least three minutes so that the control module has time to carry out its diagnostic
- Read off diagnostic trouble codes (DTCs).
The fault has been remedied if the status of the diagnostic trouble code (DTC) has changed to intermittent.





Has the status of the diagnostic trouble code (DTC) changed to intermittent?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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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 connectors

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