FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Shift Interlock Control Module: Testing and Inspection




Key Interlock System:




Shift Lock System:




1. Disconnect the 8P connector from the interlock control unit.
2. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.

- If the terminals look OK, make the input tests shown in the table at the connector.
- If a test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, substitute a known-good control unit, and recheck the system. If the check is OK, the control unit must be faulty; replace it.

NOTE: If the shift lock solenoid clicks when the ignition switch is turned ON (II) and you step on the brake pedal (with the shift lever in [P]), the shift lock system is electronically normal; if the shift lever cannot be shifted from [P], test the A/T gear position switch, park pin switch.

Reconnect the 8P connector to the interlock control unit.