Without A/C

HVAC DTC Troubleshooting: 5

DTC indicator 5:

A Problem in the Mode Control Linkage, Doors, or Motor

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

2. Do the Self-Diagnostic Function with the heater control panel How To Troubleshoot The Heating System (Without A/C).

3. Check for DTCs.

Is DTC 5 indicated?

YES -

Go to step 4.

NO -

Intermittent failure. Check for damaged wires or poor connections in the air mix control motor circuit.�

4. Turn the ignition switch to LOCK (0).

5. Test the mode control motor Mode Control Motor Test.

Is the mode control motor OK?

YES -

With the mode control motor disconnected, go to step 6.

NO -

Replace the mode control motor Mode Control Motor Replacement, or repair the mode control linkage or doors.�

6. Check for continuity between following terminals of the heater control panel 24P connector and the mode control motor 7P connector.









Is there continuity?

YES -

Go to step 7.

NO -

Repair an open in the wire(s) between the heater control panel and the mode control motor.�

7. Check for continuity between body ground and heater control panel 24P connector terminals No. 14 and No. 15 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the heater control panel and the mode control motor.�

NO -

Substitute a known-good heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel Heater Control Panel Removal/Installation (Without A/C).�