M/T Reverse Lockout System Circuit Troubleshooting
  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.■
  1. Do the reverse lockout solenoid test.
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 -
Repair or replace the reverse lockout solenoid. ■