Short-Circuit To Ground

Short-circuit to ground

Checking resistance












- Ignition off
- Disconnect the connector from the blower fan power unit
- ECC control module connected.
Connect an ohmmeter between ground (0 V) and terminal 3 on the connector for the blower fan power unit.









The ohmmeter should read infinity.

OK - Replacing the component

Not OK - Checking for a short-circuit

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Replacing the component
- Replace the blower fan power unit.

Select "Continue" when the component has been replaced.

Continue - Verification

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Checking for a short-circuit
Check the cable between ECC control module connector terminal 28 and terminal 3 on the connector for the blower fan motor power unit for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.









Select Continue when the fault has been remedied.

Continue - Verification

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Verification




Verification

Hint: Check after repair that the fault has been rectified.












- Ignition off.
- Connect the connectors, reinstall components etc.
- ECC control module connected.
- Engine running.
- VCT 2000 connected to the data link connector (DLC).
Establish communication with the ECC system.





Select Continue.

Continue - Verification, continued

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Verification, continued
Check that the blower fan reacts correctly by setting the blower fan switch to positions 0 to 4 (including AUTO).





Select Continue.

Continue - Verification, continued

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Verification, continued
Read off diagnostic trouble codes (DTCs).





Select Continue.

Continue - Verification, continued

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Verification, continued
Erase the diagnostic trouble codes (DTCs).





Select Continue.

Continue - Verification, continued

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Verification, continued
Check that diagnostic trouble codes (DTCs) do not recur.





Do the diagnostic trouble codes (DTCs) recur?

Yes - VERIFICATION FAILED

No - VERIFIED

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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 - FAULT-TRACING FAILED

No - Attempt New Test

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Attempt New Test - Checking resistance

FAULT-TRACING FAILED - FAULT-TRACING FAILED

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