HVAC System

HVAC DTC Troubleshooting: 13

DTC indicator 13:

HVAC Control Unit Internal Error

NOTE: Check the battery condition Battery Test and the charging system 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.

3. Check for DTCs.

Is DTC 13 indicated?

YES -

The HVAC control unit is faulty, replace the HVAC control unit HVAC Control Unit Removal/Installation.

NO -

Intermittent failure, the HVAC control unit is OK at this time. Check for poor connections at the HVAC control unit and at G401; with premium audio, without premium audio.