Key Interlock System Circuit Troubleshooting
- Disconnect the key switch connector (7P) from the steering lock assembly.
- Connect the battery positive terminal key switch connector terminal No. 7, and connect the battery negative terminal to the terminal No. 5.
- Turn the ignition switch to ACC (I), then push the ignition key.
- Check the key interlock solenoid operation. A clicking sound should be heard while pushing the ignition key, and you should not be able to turn it to the OFF position.
Does the key interlock solenoid operate properly?
YES - Go to step 5.
NO - Faulty key interlock solenoid/switch. Replace the ignition key cylinder/steering lock assembly.
- Measure the voltage between the terminal No. 7 and body ground.
Is there battery voltage?
YES - Go to step 6.
NO - Check for a blown No. 47 (20A) fuse in the under hood fuse/relay box. If the fuse is OK, repair open or short in the wire between key switch connector terminal No. 7 and under-hood fuse/ relay box.
- Disconnect the park pin switch connector on the shift lever.
- With the shift lever in P and pulled back toward the driver, check for continuity between park pin switch connector terminals No. 1 and No. 3.
Is there continuity?
YES - Go to step 8.
NO - Repair open in the wires between the park pin switch and the connector. If the wires are OK, replace the park pin switch.
- Check for continuity between park pin switch connector terminal No. 3 and key switch connector terminal No. 5.
Is there continuity?
YES - Go to step 9.
NO - Repair open in the wire between park pin switch connector terminal No. 3 and the key switch connector terminal No. 5.
- Check for continuity between park pin switch connector terminal No. 1 and body ground.
Is there continuity?
YES - Check for a loose key switch connector and park pin switch connector. If necessary, substitute a known-good steering lock assembly.
NO - Repair open in the wire between park pin switch connector terminal No. 1 and ground (G401), or repair poor ground (G401).