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Home >> Pontiac >> 2001 >> Aztek Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 106 (Engine Controls Self-Diagnostics - 6.5L) >> Diagnostic Tests >> DTC P1643: Wait To Start Indicator Control Circuit >> Test Description
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Test Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step numbers in the diagnostic procedures.

  1. 2

    Tests the ON and the OFF states. Repeat the command as many times as necessary. When the glow plugs are commanded ON by the scan tool, an internal PCM timer protects the glow plugs from damage by cycling the plugs ON for 3 seconds and OFF for 12 seconds. After the 12 seconds has elapsed, the glow plugs can be commanded ON again.
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