LEMON Manuals: Even more car manuals for everyone
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 >> Circuit Description

Circuit Description

WARNING: This page is about a different variant/trim than selected.

Vehicle operation is disabled if incorrect key or starting procedure is used. Vehicle Theft Deterrent (VTD) module enables crank circuit to starter and sends a signal to PCM if correct key is being used. If proper signal does not reach PCM fuel enable signal circuit, PCM will not pulse injectors on, disabling vehicle, even if crank circuit is by-passed. Signal should be between 40-60 Hz and is measured using DC scale on DVOM.

Conditions required to set DTC are: