DTC 42

NOTE: The source of code 42 can be from either the Air Inlet Damper Position Sensor circuit or the Air Inlet Servomotor circuit. It may be necessary to complete both inspection procedures below to find the source of the trouble code.

Air Inlet Damper Position Sensor Circuit

This sensor detects the position of the air inlet damper and sends the appropriate signals to the air conditioning control assembly. The position sensor is built into the air mix servomotor assembly.

Diagnostic Chart:

Wiring Diagram:

Inspection Procedure - Step 1:

Step 2:

Step 3:

Air Inlet Servomotor Circuit

The air inlet control servomotor is controlled by the A/C control assembly and moves the air inlet damper to the desired position.