DTC 021

DTC 021

CIRCUIT DESCRIPTION
The vehicle speed sensor (VSS) provides vehicle speed input voltage to the instrument cluster and in turn to the cruise control module.

DIAGNOSTIC AIDS
Check for the following:
Short to ground or an open condition in the PPL/WHT wires between the instrument cluster assembly, the left instrument panel (I/P) junction block, and the cruise control module.

Inspect the wiring harness and components for any of the following conditions:
- Backed out terminals
- Improper mating of terminals
- Broken electrical connectors locks
- Improperly formed or damaged terminals
- Faulty terminal to wire connections
- Physical damage to the wiring harness
- A broken wire inside the insulation
- Corrosion of electrical connections, splices, or terminals

Repair any electrical circuit faults that were found.

TEST DESCRIPTION

Steps 1 - 5:

The numbers below refer to the step numbers on the diagnostic table.
2. This step tests for a short to ground or an open condition in the PPL/WHT wire which supplies VSS signal voltage to the cruise control module.
3. This step tests for a short to ground in the PPL/WHT wire which supplies VSS signal voltage from the instrument cluster assembly to junction block 3