Sporadic Signal. Permanent Fault

Sporadic signal. Permanent fault

Checking the connectors








Check the engine speed (RPM) sensor and engine control module (ECM) connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault. Remedy if necessary.
Check in particular for damage or loose terminal pins.
Reconnect the connectors.
Start the engine.
Read off the status of the diagnostic trouble code (DTC).





Is the status intermittent?

Yes - FAULT FOUNDVerification

No - Checking components and wiring

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Checking components and wiring
Check the flywheel and carrier plate for damage.
Check the signal cables between engine control module (ECM) terminals #24 and #54 and engine speed (RPM) sensor terminals #1 and #2. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault. Check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault. Check for a short-circuit to each other and for open-circuits according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault. Remedy if necessary.

Hint: With the ignition on, the voltage between engine speed (RPM) sensor connector terminals #1 and #2 must be approximately 1.8 V with the reading taken at the ground terminal.

Try a new engine speed (RPM) sensor if no faults are found in the above fault-tracing.

Other information:
- To connect the breakout box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000
- To replace the engine speed (RPM) sensor, see Replacing engine speed (RPM) sensor Service and Repair.





Select Continue.

Continue - Verification

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Verification




Start the engine.
Allow the engine to idle for approximately 2 minutes.
Read off the status of the diagnostic trouble code (DTC).





Is the status intermittent?

Yes - FAULT FOUND

No - No Fault FoundFault-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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the connectors

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