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Home >> Cadillac >> 2002 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (Engine Control System Self-Diagnostics - 3.8L) >> Diagnostic Tests >> DTC P0502: Vehicle Speed Sensor Circuit - Low Output >> Test Description
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Test Description

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 Pontiac Grand Prix, 2002 Pontiac Bonneville, 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, and 2002 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedures.

  1. 3

    This step test the ability of the VSS to produce an AC voltage. This step also verifies the integrity of the wiring to the PCM.

  2. 4

    This step test the VSS circuit for correct resistance.
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