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Symptom: VEHICLE SPEED FAILURE (ACTIVE) When Monitored and Set Condition: VEHICLE SPEED FAILURE (ACTIVE) When Monitored: Every 8 seconds with the ignition on. Set Condition: This condition is set if the AZC does not receive the vehicle speed response message within 8 seconds. POSSIBLE CAUSES CHECK THE PCM FOR ANY DTCS OBSERVE THE VEHICLE SPEED DISPLAY IN THE INSTRUMENT CLUSTER AUTOMATIC ZONE CONTROL MODULE TEST ACTION APPLICABILITY 1 Turn the ignition on. All Yes → Refer to the Powertrain Diagnostic Information. No → 2 Raise the drive wheels off the ground. All Yes → No → Replace and program the Powertrain Control Module in accor- 3 With the DRB, erase the AZC DTC’s. All Yes → Replace the AZC Module. No → Test Complete. 331 HEATING & A/C |