Diagnostic Aids
WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
- Performing the Fuel Injector Coil test may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis (w/CH47976) or Fuel Injector Diagnosis (w/J39021 or w/Tech 2) .
- For an intermittent condition, refer to Intermittent Conditions .
DTC P0201, P0202, P0203, P0204, or P0205
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views |
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| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
Go to Step 3 | Go to Diagnostic Aids |
| 3 |
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Go to Step 7 | Go to Step 4 |
| 4 | Does the test lamp remain illuminated at all times? | Go to Step 6 | Go to Step 5 |
| 5 | Test the control circuit of the fuel injector for a short to voltage or for an open between the multi-way connector and the PCM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 18 | Go to Step 14 |
| 6 | Test the control circuit of the fuel injector for a short to ground between the multi-way connector and the PCM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 18 | Go to Step 17 |
| 7 | Inspect the accessible fuel injector jumper harness between the multi-way connector and the intake manifold for the following:
Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? |
Go to Step 18 | Go to Step 8 |
| 8 | Probe the appropriate fuel injector control circuit, fuel injector side, at the multi-way connector, with a test lamp that is connected to battery voltage. Refer to Probing Electrical Connectors
. Does the test lamp illuminate? |
Go to Step 15 | Go to Step 9 |
| 9 | With a DMM, test for continuity between the ignition 1 voltage circuit terminal and the appropriate fuel injector control circuit terminal, at the multi-way connector. Refer to Testing for Continuity
. Does the DMM indicate OL? |
Go to Step 10 | Go to Step 12 |
| 10 | Test the control circuit of the fuel injector for an open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 18 | Go to Step 11 |
| 11 | Test the ignition 1 voltage circuit of the fuel injector for an open between the fuel injector and the splice. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 18 | Go to Step 13 |
| 12 | Test the control circuit of the fuel injector for a short to voltage or a short to another circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 18 | Go to Step 16 |
| 13 | Test for an intermittent and for a poor connection at the affected fuel injector. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 18 | Go to Step 16 |
| 14 | Test for an intermittent and for a poor connection at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 18 | Go to Step 17 |
| 15 | Repair the short to ground in the fuel injector control circuit. Refer to Wiring Repairs
. Did you complete the repair? |
Go to Step 18 | - |
| 16 | Replace the appropriate fuel injector. Refer to Fuel Injector Replacement
. Did you complete the replacement? |
Go to Step 18 | - |
| 17 | Replace the PCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 18 | - |
| 18 |
|
Go to Step 2 | Go to Step 19 |
| 19 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? |
Go to Diagnostic Trouble Code (DTC) List - Vehicle | System OK |