Troubleshooting

Troubleshooting ECM-P062800

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 ground, as well as open circuit.
Remedy as necessary.

Other information
- Connecting the breakout box, B8444S Connecting The Breakout Box, Engine Control Module (ECM)
- Control module fuel pump (FP), replacing, B8444S, B6324S5 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 - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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Fault-tracing information

Attempt New Test - Checking the diagnostic trouble codes (DTCs)

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