Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Shift Interlock: Testing and Inspection






SHIFTER WILL NOT RELEASE FROM PARK WITH IGNITION IN OFF OR RUN POSITIONS
1. Knob not fully seated.
2. Interlock cable assembly kinked.

SHIFTER RELEASES FROM PARK WITH IGNITION KEY IN LOCK OR ACC POSITIONS
1. Interlock wire not attached to shifter bellcrank.
2. Interlock cable bracket not seated on bellcrank pivot pin.
2. Interlock wire broken.

IGNITION KEY WILL NOT TURN TO LOCK POSITION
1. Interlock cable assembly kinked.
2. Shifter bellcrank binds, bent guide pin.

SHIFTER RELEASES FROM PARK WITH IGNITION KEY IN RUN & BRAKE PEDAL NOT DEPRESSED
1. Solenoid electrical connector disconnected.
2. Interlock cable and solenoid damaged.