NO.29 DOES NOT UPSHIFT IN M RANGE [SJ6A-EL]

id050307803400

29
Does not upshift in M range
DESCRIPTION
•  Gear position indicator light in instrument cluster illuminates, but the vehicle does not upshift when the selector lever is pushed to “+” side or steering shift switch “UP” is pulled.
POSSIBLE CAUSE
•  Up switch or related wiring harness malfunction
•  Steering shift switch (UP) or related circuit malfunction.

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Inspect the UP SW PID value using the M-MDS when the selector lever is pushed to “+” side.
•  Is the UP SW PID value normal?
Yes
Go to the next step.
No
Inspect the up switch.
(See SELECTOR LEVER COMPONENT INSPECTION.)
If the up switch has a malfunction:
•  Replace the selector lever component.
If the up switch is normal:
•  Inspect for continuity between selector lever component terminal D and TCM terminal 2J.
•  Repair or replace the suspected wiring harness.
2
•  Inspect the UP SW PID value using the M-MDS when the steering shift switch “UP” is pulled.
•  Is the UP SW PID value normal?
Yes
Inspect the instrument cluster.
(See INSTRUMENT CLUSTER INSPECTION.)
Replace the instrument cluster, if necessary.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No
Inspect the steering shift switch.
(See STEERING SHIFT SWITCH INSPECTION.)
If the steering shift switch has a malfunction:
•  Replace the steering shift switch.
If the steering shift switch is normal:
•  Inspect for continuity between steering shift switch and TCM terminal 2AF.
•  Repair or replace the suspected wiring harness.
3
•  Verify test results.
―  If normal, return to the diagnostic index to service any additional symptoms.
―  If malfunction remains, inspect the related Service Information and perform repair or diagnosis.
•  If the vehicle is repaired, troubleshooting completed.
•  If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM. (See TCM REMOVAL/INSTALLATION [SJ6A-EL].)