Manufacturer Code Charts: 7

HVAC DTC Troubleshooting: 7

DTC indicator 7:

HVAC Control Unit Internal Error

NOTE: Check the battery condition Testing and Inspection and the charging system, K24Z6 engine Charging System Indicator Circuit Troubleshooting.

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

2. Do the self-diagnostic function with the HVAC control unit How To Troubleshoot The Heating And A/C Systems (Without Climate Control).

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 (Without Climate Control).�

NO -

Intermittent failure, the HVAC control unit is OK at this time. Check for poor connections at the HVAC control unit and at G503.�