Signal Too High

Signal too high

Checking the transmission input speed sensor signal




- Gear selector in position P
- Start the engine and let it run at idle speed
- Read off the transmission input speed.
Depress the accelerator pedal (AP) and check that engine speed (RPM) is updated.





Is the speed updated?

Yes - Intermittent fault

No - Checking wiring and sensors

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Checking wiring and sensors




- Ignition off.
Check the wiring between transmission control module (TCM) terminals #11 and #12 and terminals #1 and #2 on the white 2-pin transmission connector. Check for a short-circuit to each other.
Check the power supply cable between control module terminal #11 and terminal #2 on the white 2-pin transmission connector. Check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the signal cable between control module terminal #12 and terminal #1 on the black 2-pin transmission connector (control module side). Check for an open-circuit and a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the breakout box, AW55-50/51SN Connecting The Breakout Box
- To disconnect the control module, see Replacing the transmission control module (TCM), AW55-50/51SN Service and Repair
- To disconnect the transmission connector, see Transmission connectors, AW55-50/51SN Transmission Connectors
- To check or replace the transmission speed sensor, see Replacing the engine speed (RPM) sensor, AW55-50/51SN Service and Repair
- For information about signals, see Signal description. Transmission control module (TCM), AW55-50/51SN Signal Description.













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.
- Start the engine and let it run at idle speed
- Gear selector in position P
- Read off the transmission input speed.
Depress the accelerator pedal (AP) and check that engine speed (RPM) is updated.
Compare with the engine speed (RPM).





Is the speed updated?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - 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 transmission input speed sensor signal

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Intermittent fault




- Ignition off.
Check the transmission control module (TCM) and transmission connectors. Check for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check the power supply cable between control module terminal #11 and terminal #2 on the white 2-pin transmission connector. Check for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check the signal cable between control module terminal #12 and the terminal #1 on the black 2-pin transmission connector. Check for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the breakout box, AW55-50/51SN Connecting The Breakout Box
- To disconnect the control module, see Replacing the transmission control module (TCM), AW55-50/51SN Service and Repair
- To disconnect the transmission connectors, see Transmission connectors, AW55-50/51SN Transmission Connectors
- To check or replace the transmission speed sensor, see Replacing the engine speed (RPM) sensor, AW55-50/51SN Service and Repair
- For information about signals, see Signal description. Transmission control module (TCM), AW55-50/51SN Signal Description.













Continue - Diagnostic trouble code (DTC) information

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Diagnostic trouble code (DTC) information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Checking the transmission input speed sensor signal

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