Faulty Signal

Faulty signal

Checking the components and wiring
- Check the connector for the transmission control module (TCM). Check for contact resistance. Check for oxidation.
Check that the transmission output speed sensor is correctly installed and that there is no damage to the speed sensor.
Check the power supply cable between transmission control module (TCM) terminal #B2 (#A52) and the transmission output speed sensor. Check for a short-circuit to supply voltage. Check for a short-circuit to ground. Check for an open-circuit
Check the signal cable between transmission control module (TCM) terminal #B1 (#A51) and the transmission output speed sensor. Check for a short-circuit to supply voltage. Check for a short-circuit to ground. Check for an open-circuit

Hint: This diagnostic trouble code (DTC) can be caused by a fault in the transmission output speed sensor.

Other information
- Connecting the breakout box, AW55-50/51SN Connecting Breakout Box, Transmission Control Module (TCM)
- Transmission control module (TCM) Service and Repair
- Signal specification, AW55-50/51SN Signal Specification, Transmission Control Module (TCM)
- Checking wiring and terminals Checking Wiring and Terminals

Transmission Output Speed Sensor:

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.
- Raise the car so that the drive wheels are clear of the ground
- Start the engine. Allow the engine to idle
- Shift gear selector to position D so that the drive wheels begin to rotate
- Read off the transmission speed.
Check that the speed is updated.

Note! Diagnostic trouble codes (DTCs) may be stored in the brake control module (BCM) when the rear wheels are stationary and the front wheels rotate. Erase any diagnostic trouble codes (DTCs) after fault-tracing.

Note! Ensure that the wheels are not rotating when the gear selector is moved.





Was the speed updated?

Yes - VERIFIED

No - VERIFICATION FAILEDPAPER

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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 components and wiring

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