Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information TCM-P072100

Condition
The transmission's output speed sensor sends the transmission control module (TCM) a signal on the speed of the output drive shaft. Using this signal, the control module calculates the outgoing speed of the transmission. The signal is compared to the input speed signal from the transmission speed sensor and is used to calculation the transmission's gear ratio and for diagnostics.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The speed signal from the brake control module (BCM) does not match the signal from the output speed sensor.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Speed higher than 30 km/h (20 mph) and engine speed over 400 rpm.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.





Substitute value
- Adaptation function is blocked.
- The lock-up function is blocked.
- Slip lock-up function is blocked.
- Neutral check function is blocked.
- The transmission control module (TCM) uses the speed signal that the brake control module (BCM) puts on the CAN network.
- If the speed signal from the brake control module (BCM) is also missing, the auxiliary program Emergency mode 1 in the transmission control module (TCM) will become active.

Hint: Emergency mode in the event of a fault, B6324S5, TF-80SC, B6324S5, TF-80SC AWD Emergency Mode In The Event Of A Fault

Possible source
- Contact resistance in the terminals.
- Transmission output speed sensor not fitted correctly.
- Transmission output speed sensor not working.
- The wheel radius does not agree with the wheel radius programmed in the vehicle's configuration file.

Fault symptom[s]
- Malfunction indicator light (MIL), on
- General warning lamp lit
- No lock-up
- Rough gear shift
- No gear shift