DTC 023

DTC 023

CIRCUIT DESCRIPTION
This DTC checks for an abnormal VSS input to the cruise control module or a malfunction within the cruise control module.

DIAGNOSTIC AIDS
Check for the following:
- DTCs in the powertrain control module
- If the speedometer operates normally, the VSS is OK
- Open or high resistance in the PPL/WHT wire between the left instrument panel junction block C 3 and the cruise control module
- Faulty cruise control module

An intermittent may be caused by a poor connection, rubbed through wire insulation or a wire broken inside the insulation. Inspect the following harness connectors for backed out terminals, improper mating, broken lock, improperly formed or damaged terminals or for poor terminal-to-wire connection before replacing the suspect component:
- Cruise control module connector
- Left instrument panel junction block C 3

TEST DESCRIPTION

Steps 1 - 2:

Steps 3 - 6:

The number below refers to the step number on the diagnostic table.
2. This step tests the resistance of the cruise control servo magnetic clutch circuit.