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Home >> Chevrolet >> 1998 >> Monte Carlo LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Controls - Tests W/Codes - 3.8L) >> Diagnostic Trouble Codes >> DTC P1629 - Theft Deterrent Crank Signal Malfunction >> Diagnostic Aids

Diagnostic Aids

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Check for faulty connections or damaged harness. Disconnect TDS module connector. Turn ignition on. Connect a DVOM between engine ground and TDS module harness connector fuel enable circuit. Observe DVOM while moving all related harness and connectors. A change in voltage display indicates fault location.

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