The shift motor is controlled by the TCCM as needed for 4H, 4L, and AUTO operation. The shift motor uses a 4-switch Position Encoder that provides motor position data to the TCCM.
Position Encorder is installed on shift motor and consists of 4 switches. Whenever switching Mdoe switch, shift motor is operating, making that position encoder point changes ON and OFF. Finallly, with this ON and OFF signal goes to TCCM, TCCM check shift motor operation.
TCCM sets DTC P1737 if TCCM detects Shift Motor control circuit is open or short to ground.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Voltage Check |
•
Poor Connection
•
Faulty Shift Motor
•
Faulty TCCM |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
Shift motor is open or short to ground for 2 sec. | |
MIL ON Condition |
•
Lamp ON |
