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.
In order to avoid a misdiagnosis, perform the following:
- Inspect for proper operation of the stop lamps. Refer to Exterior Lighting Systems Description and Operation in Lighting Systems.
- Inspect for proper adjustment of the stop lamps. Refer to Stop Lamp Switch Adjustment in Lighting Systems.
- Inspect for proper adjustment of the cruise control release switch. Refer to Cruise Release Switch Adjustment .
- For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
DTC P1574
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference : Cruise Control Schematics (3.0L) or Cruise Control Schematics (2.2L) Connector End View Reference: Cruise Control Connector End Views or Lighting Systems Connector End Views in Lighting Systems |
|||
| 1 | Did you perform the Cruise Control Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Cruise Control |
| 2 |
|
Go to Step 3 | Go to Diagnostic Aids |
| 3 | Do the stop lamps operate properly? | Go to Step 4 | Go to Stop Lamps Inoperative in Lighting Systems |
| 4 | Test the stop lamp switch signal circuit for an open or for a high resistance. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 7 | Go to Step 5 |
| 5 | Inspect for poor connections at the harness connector of the ECM. 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 7 | Go to Step 6 |
| 6 |
IMPORTANT:
Program the replacement ECM. Replace the ECM. Refer to ENGINE CONTROL MODULE
.Did you complete the replacement? |
Go to Step 7 | - |
| 7 |
|
Go to Step 2 | System OK |