Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking engine cooling fan (FC) relay








- Ignition off
- Disconnect engine cooling fan (FC) relay 2/10.
Connect an ohmmeter between the engine cooling fan (FC) relay terminals 1 and 2 (relay side).













The ohmmeter should read approximately 105 ohms at +20°C.

OK - Checking the signal cable

Not OK - Defective engine cooling fan (FC) relay

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Checking the signal cable




- Ignition on.
Check the cable between the engine cooling fan (FC) relay base terminal 2 and the engine control module (ECM) connector terminal 38 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Remedy as necessary.













Select Continue.

Continue - Verification

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Defective engine cooling fan (FC) relay
Try a new engine cooling fan (FC) relay.

Select Continue.

Continue - Verification

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Verification








- Reconnect the connectors, reinstall components etc.
- Connect VCT 2000
- Ignition on.
Activate the engine cooling fan (FC) low-speed using VCT 2000 according to Description of activations Description Of Activations.





Does the engine cooling fan (FC) start?

Yes - FAULT FOUND

No - No Fault FoundFault-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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FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking engine cooling fan (FC) relay

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