Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information TCM-P071500

Condition
The signal for input speed comes from a sensor within the transmission control system.
The transmission control module (TCM) uses the signal to determine the input shaft speed after the torque converter.
This signal is used to compare transmission speed and vehicle speed.
The transmission control module (TCM) uses this comparison to calculate the gear-shift timing.
The rpm and road speed data are also utilized in modulating the system pressure and in reducing engine torque when shifting gear. The result is smooth gear-shifting.
The information is also used to control the lock-up function.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Voltage in the circuit to the transmission input speed sensor is too high.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Normal driving.

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 1 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
- Power supply to input speed sensor is short circuited to supply voltage.
- Transmission input speed sensor not working.
- Internal fault in the transmission control module (TCM).

Fault symptom[s]
- Malfunction indicator light (MIL), on
- No lock-up
- Rough gear shift
- No gear shift
- Text window and warning symbol/Yellow symbol and text message