Manufacturer Code Charts: 5

Control System DTCs

HVAC DTC Troubleshooting: 5

DTC indicator 5 : A Short in the Mode Control Motor Circuit

1. Problem verification:

-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.

-3. Check for DTCs.

Is DTC 5 indicated?
-YES- Go to step 2.
-NO- Intermittent failure. Check for loose wires or poor connections on the mode control motor circuit.

2. DTC check:

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.






-3. Turn the ignition switch to ON (II).

-4. Do the Self-Diagnostic Function with the HVAC control unit How To Troubleshoot The Heating and A/C Systems.

-5. Check for DTCs.

Is DTC 5 indicated?
-YES- Go to step 3.
-NO- Replace the mode control motor Mode Control Motor Removal And Installation.

3. Mode control motor S5V line check:

-1. Measure the voltage between test points 1 and 2.










Is there about 5 V?
-YES- Go to step 4.
-NO- Go to step 5.

4. Shorted wire check (MODE-P line):

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.






-3. Check for continuity between test points 1 and 2.










Is there continuity?
-YES- Repair a short in the wire between the HVAC control unit and the mode control motor.
-NO- The MODE-P wire is OK. Replace the HVAC control unit HVAC Control Unit Removal And Installation.

5. Shorted wire check (SENSOR 5V line):

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.






-3. Check for continuity between test points 1 and 2.










Is there continuity?
-YES- Repair a short in the wire between the HVAC control unit and the mode control motor.
-NO- The SENSOR 5V wire is OK. Replace the HVAC control unit HVAC Control Unit Removal And Installation.