Test B: Vehicle Does Not Move Forward
WARNING: This page is about a different variant/trim than selected.
NOTE:
If vehicle does not move forward when shifted from "N" to "D", "3", "2" or "L" positions with engine idling, likely cause is abnormal line pressure, faulty underdrive clutch, underdrive solenoid valve, valve body or PCM.
- Using scan tool, attempt to actuate underdrive solenoid valve. If solenoid operation can be heard, go to next step. If solenoid operation cannot be heard, replace solenoid. See SOLENOID VALVES under REMOVAL & INSTALLATION.
- Measure hydraulic pressure for each element with gearshift lever in "L" position. See HYDRAULIC PRESSURE TESTS under PERFORMANCE TESTS. If pressure is within specification, go to next step. If pressure is not within specification, go to step 4 .
- Remove valve body assembly. See REMOVAL & INSTALLATION in appropriate SERVICING article in AUTOMATIC TRANSMISSIONS. Air check underdrive clutch. See Fig 1 . If clutch air checks okay, go to next step. If clutch does not air check okay, go to step 5 .
- Disassemble valve body and inspect. See appropriate OVERHAUL article. Check for loose bolts, damaged "O" rings, valves and valve bodies. Repair or replace as necessary.
- Remove transaxle assembly. See appropriate REMOVAL & INSTALLATION article in AUTOMATIC TRANSMISSIONS. Disassemble transaxle and inspect underdrive clutch. See appropriate OVERHAUL article. Check for burned clutch components, defective seals, and retainer interference. Repair as necessary. If symptom is eliminated, diagnosis is complete. If symptom is not eliminated, replace PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE.