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

S 3 SHIFT LOCK CONTROL COMPUTER
1-GROUND: Approx. 12 Volts with the ignition SW at ACC or ON position
3-GROUND: Approx. 12 Volts with the ignition SW at ON position
6-GROUND: 0 Volts with ignition SW at ACC position and shift lever position in P position
6-12 Volts with shift lever position in except P position
7-GROUND: Always continuity
8-GROUND: Approx. 12 Volts with the brake pedal depressed