DTC 023

Diagnostics Trouble Code Chart:

Wiring Schematic:

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 junction block 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.
^ Junction block 3 C1.
^ C210.

TEST DESCRIPTION
Number(s) below refer to the step number(s) on the Diagnostic Table.
2. This step tests the VSS circuit input to the cruise control module for an open or high resistance or for a faulty cruise control module.