NO.30 DOES NOT DOWNSHIFT IN M RANGE [AW6AX-EL]

id0503j6803500

30
Does not downshift in M range
DESCRIPTION
•  Gear position indicator light in instrument cluster illuminates, but the vehicle does not downshift when the selector lever is pushed to “–” side.
POSSIBLE CAUSE
•  Down switch or related wiring harness malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
Inspect the voltage at the TCM terminal A4.
(See TCM INSPECTION [AW6AX-EL].)
Is the voltage normal?
Yes
Inspect the instrument cluster.
No
Inspect the down switch.
•  If the down switch is normal, inspect for continuity between the down switch and TCM terminal A4.
2
•  Verify test results.
―  If normal, return to the diagnostic index to service any additional symptoms.
―  If the 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.