Retained Accessory Power System: Overview Pontiac Aztek I

Scheme 13

Test Description

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

1. 2 - Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
2. 4 - The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed

Scheme 14

Scheme 15

Scheme 16

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

1. 2 - Listen for an audible click when the RAP relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
2. 3 - Verifies that the BCM is providing voltage to the RAP relay.
3. 4 - Tests for an open in the ground circuit to the RAP relay.
4. 5 - Tests if voltage is constantly being applied to the RAP relay.

Scheme 17

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

1. 2 - Listen for an audible click when the RAP operates. Command both the ON and OFF states. Repeat the commands as necessary.
2. 3 - Verifies that the BCM is providing voltage to the RAP relay.
3. 4 - Tests for an open in the ground circuit to the RAP relay.
4. 5 - Tests if voltage is constantly being applied to the RAP relay.

Scheme 18

Scheme 19

Symptoms - Retained Accessory Power

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to RETAINED ACCESSORY POWER (RAP) DESCRIPTION AND OPERATION .