M/T Reverse Lockout System Circuit Troubleshooting
NOTE:
  • Refer to the How to Troubleshoot Circuits at the ECM connectors in the Fuel and Emission Systems before troubleshoot this circuit: R20A3 engine model, K24Z3 engine model.
  • When you inspect whether it is possible or not the transmission shift into reverse gear during the vehicles runs forward, raise the vehicle on the 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 the transmission into reverse gear during the wheels are driven to forward.
  • When the vehicle on the lift, and you make the wheels drive, turn off the VSA system by the VSA OFF switch.
Driver can select the reverse gear when vehicle speed at 20 km/h (12 mph) or more
  1. Turn the ignition switch to LOCK (0).
  1. Check the No. 7 (15 A) fuse in the driver's under-dash fuse/relay box.
Is the fuse OK?
YES -
Reinstall the fuse, then go to Step 3 .
NO -
Install the new No. 7 (15 A) fuse, and recheck. If the fuse continues to blow, check for short to body ground in the wire between the No. 7 (15 A) fuse in the driver's under-dash fuse/relay box and the reverse lockout solenoid or other component.■
  1. Test-drive the vehicle.
  1. Check the fuel and emissions system's DTC with the HDS.
Is any DTC in the ECM indicated?
YES -
Go to the indicated ECM DTC's troubleshooting: R20A3 engine model, K24Z3 engine model. ■
NO -
Go to Step 5 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the reverse lockout solenoid 2P connector.
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between the reverse lockout solenoid 2P connector terminal No. 2 and body ground.
Is there battery voltage?
YES -
NO -
Repair open in the wire between the reverse lockout solenoid and the No. 7 (15 A) fuse in the driver's under-dash fuse/relay box.■
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM connector A (44P).
  1. Check for continuity between the reverse lockout solenoid 2P connector terminal No. 1 and ECM connector A (44P) terminal No. 27.
Is the continuity?
YES -
Go to Step 13 .
NO -
Repair open in the wire between the reverse lockout solenoid and the ECM.■
Is the reverse lockout solenoid OK?
YES -
Check for loose terminals or poor connections at ECM. If necessary, update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the trouble goes away with a known-good ECM, replace the original ECM. ■
NO -
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM connector C (49P).
  1. Check for continuity between the reverse lockout solenoid 2P connector terminal No. 1 and ECM connector C (49P) terminal No. 27.
Is there continuity?
YES -
Go to Step 18 .
NO -
Repair open in the wire between the reverse lockout solenoid and the ECM.■
Is the reverse lockout solenoid OK?
YES -
Check for loose terminals or poor connections at ECM. If necessary, update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the trouble goes away with a known-good ECM, replace the original ECM. ■
NO -
Driver cannot select the reverse gear when vehicle speed at 15 km/h (9 mph) or less
  1. Turn the ignition switch to LOCK (0).
  1. 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 .
Is the reverse lockout solenoid OK?
YES -
Check the change lever assembly, if necessary inspect the internal transmission.■
NO -
  1. 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 .
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. R20A3 engine model: Disconnect ECM connector A (44P).
  1. K24Z3 engine model: Disconnect ECM connector C (49P).
  1. Disconnect the reverse lockout solenoid 2P connector.
  1. Check for continuity between body ground and reverse lockout solenoid 2P connector terminal No. 1.
Is there continuity?
YES -
Repair short to body ground in the wire between the reverse lockout solenoid and the ECM.■
NO -