Test Description

NOTE: To identify circuits referenced in testing, see Figure.

The numbers below refer to the step numbers on the diagnostic table.

3. This step tests the ignition 1 voltage circuit for proper voltage.
4. This step tests the ground circuit for an open.
5. This step tests the axle actuator control circuit duty cycle.
6. This step tests the axle actuator control circuit for an open or short.

Fig 1: All-Wheel Drive (AWD) Indicator Always On (1 of 2)
Courtesy of GENERAL MOTORS CORP.

Fig 2: All-Wheel Drive (AWD) Indicator Always On (2 of 2)
Courtesy of GENERAL MOTORS CORP.
10. If PCM requires replacement, see POWERTRAIN CONTROL MODULE in REMOVAL & INSTALLATION article in ENGINE PERFORMANCE.