Diagnostic Trouble Code (DTC) Information

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 information is transmitted by grounding a combination of signals A, B, C and PA inside the gear-shift position sensor. Diagnostic trouble code (DTC) AT-313 is posted if the transmission control module (TCM) registers an unacceptable combination of A, B, C and PA for a period of 5 seconds as shown below.





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

Substitute value
The transmission control module (TCM) limp-home program has been initiated.

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

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

Caution! The gear-shift position sensor cannot be short-circuited to supply voltage.

Note! The Motronic 4.4 engine control module (ECM) posts a diagnostic trouble code (DTC) when the transmission sends a malfunction indicator lamp (MIL) request. Erase this diagnostic trouble code (DTC) in the Motronic engine control module (ECM) when the transmission fault has been repaired.