A

HVAC DTC Troubleshooting: Indicator A

DTC indicator A: Climate Control Unit Internal Error

NOTE: Check the battery condition Testing and Inspection and the charging system. Charging System Indicator Circuit Troubleshooting

1. Turn the ignition switch to LOCK (0), and then to ON (II).

2. Do the self-diagnostic function with the climate control unit. How to Troubleshoot the Climate Control System

3. Check for DTCs.

Is DTC A indicated?
YES - The climate control unit is faulty; replace the climate control unit. Service and Repair

NO - Intermittent failure, the climate control unit is OK at this time. Check for poor connections at the climate control unit and at G401.