Improper Gear

Symptom:
IMPROPER GEAR

Test 1:

Test 2-4:

When Monitored:
Engine RPM greater than 450 and output speed (ABS) greater than 180 RPM. No Input Speed sensor N2 N3, Shift lever, and/or ABS wheel speed DTCs present.

Set Condition:
The TCM compares the calculated gear with the gear the transmission has actually engaged. If the actual gear differs from the gear calculated by the TCM, the TCM value is adjusted to the engaged gear and a counter is increased by 2. If after a shift the engaged gear and the calculated gear still match, the counter is decreased by 1 point. A DTC is detected as soon as the counter exceeds a threshold. If the fault is detected 3 consecutive ignition cycles the transmission will be placed in Limp in and the MIL activated.

POSSIBLE CAUSES
- ABS DTCS PRESENT
- SOLENOID DTCS PRESENT
- INTERNAL TRANSMISSION
- TCM - IMPROPER GEAR