DTC Troubleshooting: 8

DTC 8:  A Short in the Air Mix Control Motor Circuit

1.Disconnect the air mix control motor 7P connector.

2.Disconnect the heater control panel 30P connector.

3.Check for continuity between body ground and heater control panel 30P connector terminals No. 2, 7, 8, 25, and 26 individually.

 

Is there continuity?


YES - Repair any short to body ground in the wire(s) between the heater control panel and the air mix control motor.n


NO - Go to 4.

4.Turn the ignition switch ON (II), and check the same terminals for voltage.

 

Is there any voltage?


YES - Repair any short to power in the wire(s) between the heater control panel and the air mix control motor. This short also may damage the heater control panel. Repair the short to power before replacing the heater control panel.n


NO - Substitute a known-good heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel.n