Signal Too Low

Signal too low

Checking components and wiring
Check the cable between engine control module (ECM) terminal #B45 (#B55) and fuel pump (FP) relay base terminal #4. Check for a short-circuit to ground.
Remedy as necessary.

Other information:
- To connect the breakout box / access the control module, see Connecting the breakout box, B5234T9, B5244T7 Connecting The Breakout Box
- To access or replace the fuel pump (FP) relay, see
- For information about signals, see Signal specification Signal Specifications
- Checking wiring and terminals Checking Wiring and Terminals.









Continue - Verification

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Verification




Verification

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








- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
Activate the fuel pump (FP) relay and check that the fuel pump (FP) starts.









Does the fuel pump (FP) start?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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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 components and wiring

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