Diagnostic Aids
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for proper adjustment of the stop lamp switch and cruise/brake switch. Refer to Cruise Release Switch Adjustment in Cruise Control and Stop Lamp Switch Adjustment .
- Check for internments and poor connections. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
DTC P0504
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics and Cruise Control Schematics (3.0L)
or Cruise Control Schematics (2.2L)
in Cruise Control Connector End View Reference: Master Electrical Component List in Wiring Systems |
|||
| 1 | Did you perform the Diagnostic System Check - Lighting Systems? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Diagnostic Aids | Go to Step 3 |
| 3 |
|
Go to Step 6 | Go to Step 4 |
| 4 |
|
Go to Step 5 | Go to Step 12 |
| 5 |
|
Go to Step 16 | Go to Step 8 |
| 6 |
|
Go to Step 7 | Go to Step 10 |
| 7 |
|
Go to Step 15 | Go to Step 11 |
| 8 | Test the ignition positive voltage circuit of the cruise/brake switch for an open, high resistance, or short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 20 | Go to Step 9 |
| 9 | Test for an open, high resistance, or short to ground in the cruise control release signal circuit of the cruise/brake switch. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 20 | Go to Step 14 |
| 10 | Test the stop lamp switch signal circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 20 | Go to Step 14 |
| 11 | Test the battery positive voltage circuit of the stop lamp switch for an open or short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 20 | Go to Step 13 |
| 12 | Test the cruise control release signal circuit of the cruise/brake switch for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 20 | Go to Step 17 |
| 13 | Test the stop lamp switch signal circuit for an open, high resistance, or short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 20 | Go to Step 14 |
| 14 | Inspect for poor connections at the harness connector of the engine control module (ECM). 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 20 | Go to Step 17 |
| 15 | Inspect for poor connections at the harness connector of the cruise/brake switch. 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 20 | Go to Step 18 |
| 16 | Inspect for poor connections at the harness connector of the stop lamp switch. 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 20 | Go to Step 19 |
| 17 |
IMPORTANT:
Program the replacement ECM. Replace the ECM. Refer to ENGINE CONTROL MODULE
.Did you complete the replacement? |
Go to Step 20 | - |
| 18 | Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement . Did you complete the replacement? |
Go to Step 20 | - |
| 19 | Replace the cruise/brake switch. Refer to Cruise Release Switch Replacement
in Cruise Control. Did you complete the replacement? |
Go to Step 20 | - |
| 20 |
|
Go to Step 2 | System OK |