Signal Missing. Permanent Fault

Signal missing. Permanent fault

Checking components and wiring
Check the engine cooling fan (FC) relay connector. Check for contact resistance and oxidation.
Check the power supply cable. Check for an open-circuit. Also check that the fuse is intact.
Check the cable between engine control module (ECM) terminal #A7 and engine cooling fan (FC) relay terminal #IN1. Check for an open-circuit.
Remedy as necessary

Other information:
- To connect the breakout box, see Connecting the breakout box, B5234T9, B5244T7 Connecting The Breakout Box
- For information about signals, see Signal specification Signal Specifications
- Checking wiring and terminals Checking Wiring and Terminals
- The engine cooling fan (FC) relay is supplied with power via fuse 11A/1.














Continue - Verification

-------------------------------------------------

Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
- Activate engine cooling fan (FC).





Does the engine cooling fan (FC) start?

Yes - VERIFIED

No - VERIFICATION FAILED

------------------------

VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

-------------------------------------------------

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

------------------------

Attempt New Test - Checking components and wiring

-------------------------------------------------