Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information TCM-P072900

Condition
The transmission control module (TCM) receives a signal about input and output speed from the transmission's two speed sensors. There is a determined ratio for each gear and the signals help calculate the transmission control module (TCM) gear ratio.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Gear ratio differs by more than 10%.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Fluid temperature over +20 °C (68 °F).
- 6th gear is engaged, engine speed is greater than or equal to 250 rpm, engine torque is greater than or equal to 80 Nm and there is no acceleration.

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
- Auxiliary program Emergency mode 2 in the transmission control module (TCM) has started.

Hint: Emergency mode in the event of a fault Emergency Mode In Case Of Malfunction

Possible source
- Contact resistance or one of the solenoids controlling in an incorrect manner.
- Circuit for the solenoid. SLT, SLC3
- Mechanical fault in the transmission. Worn components in the transmission causing slippage or too low line pressure.

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