Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information
981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 998 8686 Replaced by 9511532 998 8686 Replaced By 9511532
Condition




The gear-shift position sensor signals provide the transmission control module (TCM) with data on the gear selector position. This is done by grounding a combination of signals A, B, C and PA inside the gear position sensor. Diagnostic trouble code (DTC) AT-313 is stored if the transmission control module (TCM) registers an unacceptable combination of A, B, C and PA for a period of approximately 5 seconds as shown below.





• = 0-2 V below battery voltage
O = ground

Substitute value
The control module "Limp Home" program has been initiated.

Possible source
- Short-circuit to supply voltage or ground in the signal cable.
- Open-circuit in the signal cable.
- Incorrectly adjusted gear-shift position sensor.
- Defective gear-shift position sensor.
- Contact resistance in the terminals.

Fault symptom[s]
- The warning lamp in the combined instrument panel flashes.
- Deterioration in performance because the transmission control module (TCM) prevents activation of the solenoids, this stops gear-shifting. The transmission only operates in 3rd gear in positions 3 and L, 4th gear in position D and back-up (reverse) gear in position R. Shifting can only be carried out manually between 3rd, 4th, and back-up (reverse) gear.
- No line pressure solenoid STH control, resulting in constant maximum line pressure. This leads to harsher shifting and gear meshing.
- No lock-up function.

Caution! The gear-shift position sensor will malfunction if there is a short-circuit to supply voltage.