Test Description
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 2: Test the ignition voltage supply circuit to the fuel injectors for a short to ground if the fuse is open.
- 4: This step tests for a voltage on the ignition voltage supply circuit of the fuel injectors.
Fuel Injector Circuit Diagnosis
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Connector End Views or Powertrain Control Module (PCM) Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check-Engine Controls? | - | Go to Step 2 | Go to Diagnostic System Check - Engine Controls |
| 2 | Inspect the fuel injector fuse. Is the fuel injector fuse open? |
- | Go to Step 5 | Go to Step 3 |
| 3 | Are any fuel injector DTCs set? | - | Go to DTC P0201-P0206 | Go to Step 4 |
| 4 |
|
- | Go to Step 7 | Go to Step 6 |
| 5 |
|
- | Go to Step 8 | - |
| 6 | Repair the open in the ignition voltage supply circuit, between the fuel injector fuse and the splice to the individual fuel injectors. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 8 | - |
| 7 | Inspect for poor connections at the harness connectors of the fuel injectors. 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 8 | Go to Diagnostic Aids |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? |
- | System OK | Go to Step 2 |