Dual Automatic Temperature Control (DATC) Module Diagnostic Trouble Codes (DTCs)

Using a scan tool or front panel diagnostics to check for DATC DTCs:

1. Check continuous DTCs.
2. Run DATC self-test. Refer to FRONT PANEL DATC SELF -TEST (ON-DEMAND DIAGNOSTIC TROUBLE CODES - DTCS) .

General information:

• If the DTC is continuous only and does not appear in the self-test, this indicates an intermittent fault condition, such as a poor wiring connection or a loose terminal. If the DTC does not appear after running the self-test it may also indicate that the DTC may no longer exist.
• If the DTC is continuous and appears in the self-test, this indicates a hard fault. A hard fault suggests a permanent wiring failure, disconnected connector or component failure.