LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1403 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> DTC P1633: Ignition 0 Switch Circuit >> Circuit Description

Circuit Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The powertrain control module (PCM) receives the following ignition inputs from the ignition switch:

The PCM uses a class 2 Ignition mode message and the voltage input from 2 separate systems to test the ignition 0 circuit. If the PCM detects an improper ignition 0 signal, DTC P1633 will set.

scientia non olet · About LEMON Manuals