Diagnostic trouble code (DTC) information
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 a combination of grounding signals A, B, C and PA inside the gear position sensor. Diagnostic trouble code (DTC) TCM-0039 is stored if the transmission control module (TCM) registers an unacceptable combination of A, B, C and PA for a period of 10 seconds as shown below.
| A | B | C | PA | |
|---|---|---|---|---|
| • | • | o | o | DTC |
| • | • | • | • | DTC |
| • | • | • | o | DTC |
| o | • | • | • | DTC |
| • | • | o | • | DTC |
| o | o | o | • | DTC |
• = 0-2 V below battery voltage
o = ground
Substitute Value
- The control module "Limp Home" program initiated.
Possible Source
- Contact resistance in terminals.
- 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.
Fault symptom[s]
- General orange warning lamp lit.
- Malfunction indicator lamp (MIL) lit.
- No lock-up function.
- Harsh gear shifting.
- No shifting.
The gear-shift position sensor will malfunction if there is a short-circuit to supply voltage.
HINT: Harsh shifting - due to disabled line pressure solenoid STH control. This results in constant maximum line pressure and leads to harsher shifting and gear engagement.
HINT: No shifting - because the transmission control module (TCM) prevents activation of the solenoids. This stops gear-shifting. The transmission only operates in 3rd gear in positions 1 and 2, 4th gear in positions D and 3, and reverse gear in position R. Shifting can only be carried out manually between 3rd, 4th and reverse gears.