Driver Cannot Select Reverse Gear When Vehicle Speed Is 9 MPH (15 km/h) or Less
M/T Reverse Lockout System Symptom Troubleshooting - Driver cannot select reverse gear when vehicle speed is 9 mph (15 km/h) or less
Driver cannot select reverse gear when vehicle speed is 9 mph (15 km/h) or less
NOTE:
- When checking if the transmission will shift to reverse while the wheels are being driven forward, raise the vehicle on a lift, make sure it is securely supported, and allow the front wheels to rotate freely.
- Do not release the clutch pedal if you can select reverse gear while the wheels are driven forward.
- When the vehicle is on a lift, and you make the wheels rotate, turn off the VSA system by the VSA OFF switch.
- Refer to How to Troubleshoot Circuits at the ECM connectors in the Fuel and Emissions Systems section before troubleshooting this circuit Initial Inspection and Diagnostic Overview.
1. Turn the ignition switch to LOCK (0).
2. Try to shift the transmission into reverse.
Can you shift the transmission into the reverse?
YES -
Go to step 4.
NO -
Go to step 3.
3. Do the reverse lockout solenoid test Testing and Inspection.
Is the reverse lockout solenoid OK?
YES -
Check the reverse idler gear shaft assembly M/T Reverse Idler Gear Shaft Assembly Disassembly/Reassembly, or inspect the internal transmission.�
NO -
Repair or replace the reverse lockout solenoid Service and Repair.�
4. Start the engine.
Can you shift the transmission into the reverse?
YES -
Intermittent failure, the system is OK at this time.�
NO -
Go to step 5.
5. Turn the ignition switch to LOCK (0).
6. Jump the SCS line with the HDS.
7. Disconnect ECM connector A (49P).
8. Disconnect the reverse lockout solenoid 2P connector.
9. Check for continuity between body ground and reverse lockout solenoid 2P connector terminal No. 1.
Is there continuity?
YES -
Repair a short to body ground in the wire between the reverse lockout solenoid and the ECM.�
NO -
Check for loose terminals or poor connections at the ECM. If necessary, update the ECM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM Initial Inspection and Diagnostic Overview, then recheck. If the symptom goes away with a known-good ECM, replace the original ECM Service and Repair.�