GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 2000 🢒 S/T Isuzu - 4WD 🢒 Body and Accessories 🢒 Retained Accessory Power 🢒 Retained Accessory Power (RAP) Inoperative

Step

Action

Value(s)

Yes

No

1

Did you perform the RAP Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Retained Accessory Power

2

Verify that the RAP is inoperative.

Does the RAP system operate normally?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Test the RAP fuse in the underhood fuse block for an open.

Was the RAP fuse open?

--

Go to Step 10

Go to Step 4

4
  1. Use the scan tool in order to monitor the driver and passenger door handle and jamb switches.
  2. Open and close each door.

Do the inputs change between ACTIVE and INACTIVE?

--

Go to Step 5

Go to Diagnostic System Check - Lighting Systems

5
  1. Close all of the doors.
  2. Turn the ignition and start switch to the ON position, then to the OFF position.
  3. Using the scan tool, monitor the RAP timer.

Does the RAP timer count down?

--

Go to Step 6

Go to Diagnostic System Check - Body Control System in Body Control System

6
  1. Turn the ignition and start switch to the OFF position.
  2. Open and close the drivers door to deactivate the RAP countdown timer.
  3. Disconnect the RAP relay.
  4. Disconnect the body control module connector C1
  5. Test for an open between the RAP relay connector terminal 86 to the body control module connector C1 terminal A7.

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 11

Go to Step 7

7
  1. Reconnect the body control module connector C1
  2. Test for an open between the RAP relay connector terminals 85 and 87 to the RAP fuse located in the underhood fuse block.

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 11

Go to Step 8

8

Test for an open from the RAP relay connector terminal 30 to the following components:

    • Power window circuit breaker
    • RDO IGN fuse 24

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 11

Go to Step 9

9

Replace the RAP relay.

Is the repair complete?

--

Go to Step 11

--

10

Locate and repair the short to ground in CKT 542 (RED).

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 11

--

11

Operate the system in order to verify the repair.

Did you correct the condition?

--

Sysem OK

Go to Step 3