Conditions for Clearing the DTC
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- A current DTC clears when the malfunction is no longer present.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.
DTC B1477 Diagnostic Test
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Retained Accessory Power (RAP) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems |
|||
| 1 | Did you perform the retained accessory power (RAP) Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Retained Accessory Power |
| 2 |
|
Go to Step 3 | Go to Step 4 |
| 3 | Test the RAP supply voltage 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 8 | Go to Step 5 |
| 4 | Inspect for poor connections at the first device powered by RAP supply voltage circuit - RAP relay or sunroof/power roof module. 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 8 | Go to Step 6 |
| 5 | Inspect for poor connections at the harness connector of the BCM. Refer toTesting for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 8 | Go to Step 7 |
| 6 | Replace the first device powered by RAP supply voltage circuit - RAP relay or sunroof/power roof module. Did you complete the replacement? |
Go to Step 8 | - |
| 7 |
IMPORTANT:
Perform the module setup procedure, if required.
|
Go to Step 8 | - |
| 8 |
|
Go to Step 2 | System OK |