HVAC - With A/C

HVAC DTC Troubleshooting: 7

DTC indicator 7: HVAC Control Unit Internal Error

NOTE: Check the battery condition Testing and Inspection and the charging system;R18A1 engine, Charging System Indicator Circuit Troubleshooting K20Z3 engine. Charging System Indicator Circuit Troubleshooting

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

2. Do the Self-diagnostic Function with the HVAC control unit. Reading and Clearing Diagnostic Trouble Codes

3. Check for DTCs.

Is DTC 7 indicated?
YES - The HVAC control unit is faulty, replace the HVAC control unit. HVAC Control Unit Removal/Installation (With A/C)

NO - Intermittent failure, the HVAC control unit is OK at this time.