Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
- 2
Listen for an audible click when the inadvertent power relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
- 3
Tests for voltage at the battery positive voltage circuit, coil side, of the inadvertent power relay. The CTSY LP fuse supplies voltage to the coil side of the inadvertent power relay.
- 4
Verifies that the body control module is providing ground to the inadvertent power relay.
- 5
Tests if ground is constantly being applied to the inadvertent power relay.
- 6
Since this is a general circuit malfunction code, it is necessary to test for both a short to voltage as well as an open on this circuit.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Step 8 | Go to Step 3 |
| 3 |
|
Go to Step 4 | Go to Step 11 |
| 4 |
|
Go to Step 9 | Go to Step 5 |
| 5 | Does the test lamp remain illuminated with each command? | Go to Step 7 | Go to Step 6 |
| 6 | Test the courtesy lamp relay control circuit of the inadvertent power relay for a short to voltage or an open. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 10 |
| 7 | Test the courtesy lamp relay control circuit of the inadvertent power relay for a short to ground. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 10 |
| 8 | Test the courtesy lamps supply voltage circuit between the body control module and the inadvertent power relay for a high resistance or an open. Did you find and correct the condition? |
Go to Step 14 | Go to Step 13 |
| 9 | Inspect for poor connections at the inadvertent power relay. 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 14 | Go to Step 12 |
| 10 | Inspect for poor connections at the harness connector of the body control module. 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 14 | Go to Step 13 |
| 11 | Repair the battery positive voltage circuit of the inadvertent power relay. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 14 | - |
| 12 | Replace the inadvertent power relay. Did you complete the replacement? |
Go to Step 14 | - |
| 13 |
IMPORTANT:
Replace the body control module. Refer to Body Control Module Replacement
in Body Control System.Did you complete the replacement?Perform the setup procedure for the body control module. |
Go to Step 14 | - |
| 14 |
|
Go to Step 2 | System OK |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.