A/T Interlock System - Key Interlock System Circuit Troubleshooting

1.Disconnect the steering lock assembly connector.

2.Check if the ignition key can be turned to LOCK (0) position, and removed from the key cylinder.

Is the ignition key able to turn to LOCK (0) position, and remove from key cylinder?


YES - Go to 3.


NO - Replace the ignition key cylinder/steering lock assembly.n


3.Disconnect the O/D switchshift lock solenoid/park pin switch connector.

4.Check for continuity between the No. 1 and No. 2 terminals of the O/D switch/shift lock solenoid/park pin switch connector while the shift lever is in [P] position, and when shift lever out of [P].

 

Is there continuity while the shift lever is in [P] position, and no continuity when the shift lever out of [P]?


YES - Go to 5.


NO - Faulty the park switch, replace it.n


5.Connect the steering lock assembly connector.

6.Turn the ignition switch to ACC (I).

7.Measure the voltage between the No. 1 terminal of the O/D switch/shift lock solenoid/park pin switch connector and body ground.

 

Is there voltage?


YES - Repair open in the wire between the park pin switch and ground (G401), or repair poor ground ( G401).n


NO - Except KS model: Check for an open in the wire between the park pin switch connector and the under-dash fuse/relay box via the key interlock relay. If the wire is OK, replace the key interlock relay, and recheck.nKS model: Check for an open in the wire between the park pin switch connector and the interlock control unit. If the wire is OK, check for loose terminal fit in the interlock control unit connector. If necessary, substitute a known-good interlock control unit and recheck.n