Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information TCM-P171900

Condition
The engine control module (ECM) puts a signal about the present torque on the control area network (CAN). The transmission control module (TCM) uses the signal to determine shift points and to adjust system pressure in the transmission.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- There is no torque signal from the engine control module (ECM) or the signal is faulty.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition on and CAN network OK.





Substitute value
- Auxiliary program Emergency mode 3 in the transmission control module (TCM) has started.

Hint: Emergency mode in case of malfunction, B6304T4, TF-80SC AWD, B5254T5, TF-80SC Emergency Mode In Case of Malfunction

Possible source
- Locate the cause of the fault in the engine control module (ECM).
- Fault-trace the central electronic module (CEM).
- Intermittent open circuit or short-circuit on the CAN lead between the engine control module (ECM) and the transmission control module (TCM).

Fault symptom[s]
- Warning lights and chimes/Malfunction Indicator Light ("Check engine" light) indication/no indication
- Text window and warning symbol/Yellow symbol and text message
- Automatic transmission/No automatic gearshift
- Automatic transmission/No manual gear shift
- Automatic transmission/Lockup does not work
- Automatic transmission/Shifts rough or jerky/Unsure when/at all times
- Driving/Poor performance/lacks power