ATC Sensor Diagnosis

Condition

- On-Board Diagnostic DTC 03 (Warm Air Discharge at 65°F (18°C) or Cool Air Discharge at 85°F (29°C)

Possible Source(s):

- Automatic temperature control sensor open or shorted.

Action(s) to Take:

- Disconnect wire harness connector at automatic temperature control sensor. Measure resistance across automatic temperature control sensor terminals and compare with specifications in the Sensor Resistance Table. If resistance is out of specifications, replace automatic temperature control sensor. If automatic temperature control sensor is OK, proceed to "Wire harness open or shorted".

Possible Source(s):

- Wire harness open or shorted.

Action(s) to Take:

- Disconnect battery cables. Disconnect wire harness connector from automatic temperature control sensor and disconnect both connectors from EATC control assembly. Check for continuity and for possible shorting between the two wires (Pin 2 and Pin 17). Service as necessary. Reconnect wire harness and battery cables.