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.
DTC P1738 is set if shift motor doesn’t work at all, even although TCCM sends signal to control Shift Motor operation
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Voltage Check |
•
Poor Connection
•
Faulty Shift Motor
•
Mechanical Problem inside of Shift Motor
•
Faulty TCCM |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
Shift motor doesn’t reach the target within 10sec. although TCCM sends control signal to Shift Motor | |
MIL ON Condition |
•
Lamp ON |
