Fault-Tracing

Troubleshooting ECM-P062900

Checking the status




- Ignition on, wait for at least 15 seconds to perform the diagnosis.
Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list.
Check if the malfunction is permanent or intermittent by reading off the diagnostic trouble code's status when the diagnostic status is "Implemented".
If the trouble status is "Malfunction found", this indicates that the malfunction is permanent. If the trouble status is "No malfunction found", this indicates that the malfunction is intermittent and not active right now.

Note! Trouble status cannot go from "Malfunction found" to "No malfunction found" in the same operating cycle.





Continue - Checking the diagnostic trouble codes (DTCs)

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Checking the diagnostic trouble codes (DTCs)

Hint: This diagnostic trouble code may be generated for malfunctions detected by the central electronic module (CEM).

Note! If there are diagnostic trouble codes stored in the central electronic module (CEM) for fuel pump or relay for fuel pump, then troubleshoot and remedy these first.





Continue - Checking components and wiring

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Checking components and wiring




- Start and warm up the engine.
Read off the fuel pump's load (signal from engine control module (ECM) to fuel pump module).
Check that the signal is approx. 50 % (±10 %) for idling, warm engine.
Check the cable between engine control module (ECM) #B20 (#C20) and fuel pump module #1 for short-circuit to voltage.
Remedy as necessary.

Other information
- Connecting the breakout box, B8444S Connecting the Breakout Box
- Signal specification, engine control module (ECM), B8444S Signal Specification
- Control module fuel pump (FP), replacing, B8444S, B6324S Service and Repair
- 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.








- Reinstall the connectors, components etc.
- Start and warm up the engine.
Read off the fuel pump's load (signal from engine control module (ECM) to fuel pump module).
Check that the signal is approx. 50 % (±10 %) for idling, warm engine.





Is the signal reasonable?

Yes - Troubleshooting procedure complete

No - 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 the diagnostic trouble codes (DTCs)

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