GM Service Manual Online
For 1990-2009 cars only

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Action

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Schematic Reference: Retained Accessory Power (RAP) Schematics

Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Install a scan tool.
  2. Turn OFF the ignition.
  3. Observe the remote control door lock receiver (RCDLR) Accessory 1 status.

Does the Accessory 1 status indicate Off?

Go to Step 4

Go to Step 3

3

Test the RCDLR accessory voltage signal for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 12

4

  1. Observe the following parameters in driver door module (DDM) data list:
  2. • Driver Door Ajar Sw.
    • Passenger Door Ajar Sw.
    • Left Rear Door Ajar Sw.
    • Right Rear Door Ajar Sw.
  3. Open and close each door while observing the respective parameter.

Does the scan tool display change from On to Off?

Go to Step 5

Go to Symptoms - Lighting Systems in Lighting Systems

5

  1. Install a scan tool. Select diagnostic circuit check and then class 2 power mode.
  2. Close all the doors.
  3. Turn ON the ignition, with the engine OFF.
  4. Wait 5 seconds then turn the ignition OFF.
  5. Wait the time-out for retained accessory power (RAP).

Did the scan tool display the RAP power mode, then time-out and display Off-Awake power mode?

Go to Step 6

Go to Step 14

6

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the RAP relay.

Do the sunroof and radio operate?

Go to Step 7

Go to Step 8

7

Repair the short to voltage in the RAP relay switch supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

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8

  1. Open any door.
  2. Connect a test lamp across the relay coil circuits of the RAP relay.

Does the test lamp illuminate?

Go to Step 9

Go to Step 10

9

Test the RAP relay control circuit for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 12

10

Inspect for poor connections at the RAP relay. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 11

11

Replace the RAP relay.

Did you complete the replacement?

Go to Step 16

--

12

Inspect for poor connections at the harness connector of the RCDLR. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 13

13

Replace the RCDLR. Refer to Control Module References for replacement, setup, and programming.

Did you complete the procedure?

Go to Step 16

--

14

Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 15

15

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the procedure?

Go to Step 16

--

16

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2