Faulty Signal

Faulty signal

Checking the status




- Start the engine to perform the diagnostic.
Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed".
The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".









Continue - Checking the components and wiring

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Checking the components and wiring
Check the signal cable (+) between engine control module (ECM) terminal #A62 (#B2) and engine speed (RPM) sensor connector terminal #1. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check for an open-circuit.
Check the signal cable (+) between control module terminal #A21 (#21) and engine speed (RPM) sensor connector terminal #2. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check for an open-circuit.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- Crankshaft position sensor (CKP) 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.

- Ignition off
- Reinstall the connectors, components etc.
- The engine must be at idle speed to perform the diagnostic.
Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC).
Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".





Is the fault status "No fault detected"?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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Fault-tracing information

FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the status

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