Driver Cannot Select Reverse Gear When Vehicle Speed Is 9 Mph (15 Km/h) Or Less (M/T)

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.

1. Press the engine start/stop button to select the OFF mode.

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. Press the engine start/stop button to select the OFF mode.

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, then recheck. If the symptom goes away with a known-good ECM, replace the original ECM Service and Repair.