Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
- Performing the Fuel Injector Coil Test may help isolate an intermittent condition. Refer to Fuel Injector Coil Test .
- For an intermittent condition, refer to Intermittent Conditions .
Fuel Injector Circuit Diagnosis
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to DIAGNOSTIC SYSTEM CHECK - VEHICLE |
| 2 | Is DTC P0201, P0202, P0203, or P0204 set? | - | Go to DTC P0201-P0204 | Go to Step 3 |
| 3 |
|
- | Go to Step 4 | Go to Step 10 |
| 4 |
|
5 ohm | Go to Step 11 | Go to Step 5 |
| 5 |
|
- | Go to Fuel Injector Coil Test | Go to Step 6 |
| 6 | Does the test lamp remain illuminated at all times for any injector circuit? | - | Go to Step 8 | Go to Step 7 |
| 7 | Test the control circuits of the fuel injectors for an open and for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 13 | Go to Step 9 |
| 8 | Test the control circuits of the fuel injectors for a short to ground. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 13 | Go to Step 12 |
| 9 | Test for an intermittent and for a poor connection at the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 13 | Go to Step 12 |
| 10 | Repair the open in the ignition 1 voltage circuit of the fuel injectors. Refer to Wiring Repairs
. Did you complete the repair? |
- | Go to Step 13 | - |
| 11 | Repair the high resistance in the ignition 1 voltage circuit of the fuel injectors. Refer to Wiring Repairs
. Did you complete the repair? |
- | Go to Step 13 | - |
| 12 | Replace the PCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 13 | - |
| 13 | Operate the system in order to verify the repair. Did you correct the condition? |
- | System OK | Go to Step 2 |