| DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277 |
| Diagnostic Instructions |
| • |
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. | |
| • |
Review Strategy Based Diagnosis for an overview of the diagnostic approach. | |
| • |
Diagnostic Procedure Instructions provides an overview of each diagnostic category. | |
| DTC Descriptors |
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|
Ignition 1 Voltage |
P0201, P0202, P0203, P0204, P0205, P0206 |
P0201, P0202, P0203, P0204, P0205, P0206 |
- |
- |
|
Injector 1 Control Circuit |
P0261 |
P0201 |
P0262 |
- |
|
Injector 2 Control Circuit |
P0264 |
P0202 |
P0265 |
- |
|
Injector 3 Control Circuit |
P0267 |
P0203 |
P0268 |
- |
|
Injector 4 Control Circuit |
P0270 |
P0204 |
P0271 |
- |
|
Injector 5 Control Circuit |
P0273 |
P0205 |
P0274 |
- |
|
Injector 6 Control Circuit |
P0276 |
P0206 |
P0277 |
- |
| Circuit/System Description |
| Conditions for Running the DTC |
| • |
The engine speed is more than 80 RPM. | |
| • |
The ignition voltage is between 10-18 V. | |
| • |
The fuel injector has been commanded ON and OFF at least once. | |
| • |
The DTCs run continuously when the above conditions are met. | |
| Conditions for Setting the DTC |
| Action Taken When the DTC Sets |
| Conditions for Clearing the DTC |
| Diagnostic Aids |
| • |
Performing the fuel injector coil test may help isolate an intermittent condition. Refer to Fuel Injector Solenoid Coil Test. | |
| • |
If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the circuit status for the component with a scan tool. The circuit status parameter changes from OK or Not Ran to Fault if there is a condition with the circuit or a connection. | |
| Reference Information |
| • |
Circuit Testing
| |
| • |
Connector Repairs
| |
| • |
Testing for Intermittent Conditions and Poor Connections
| |
| • |
Wiring Repairs
| |
| Circuit/System Verification |
| 1. |
Observe the scan tool Cylinder 1-6 Current Misfire Counter. The Cylinder 1-6 Current Misfire Counters should not increment. | |
| 2. |
Allow the engine to run and note the diagnostic tool's diagnostic trouble code information. DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276 and P0277 must not be activated. | |
| 3. |
Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List. | |
| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the fuel injector multi-way harness connector X145. | |
| 2. |
Ignition ON, connect a test lamp between each ignition circuit terminal 1/2 and ground. The test lamp should illuminate at each ignition circuit. | |||||||
| 3. |
If the test lamp does not illuminate, test the ignition circuits for a short to ground, or an open/high resistance. If the circuits test normal and the ignition circuit fuse is open, test or replace the appropriate Q17 fuel injector. | |
| 4. |
Test for 2.6-4.6 V between the appropriate fuel injector control circuit listed below and ground. | |
| • |
Injector 1 terminal 3 |
| • |
Injector 2 terminal 6 |
| • |
Injector 3 terminal 4 |
| • |
Injector 4 terminal 7 |
| • |
Injector 5 terminal 5 |
| • |
Injector 6 terminal 8 |
| 5. |
If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module. | |
| 6. |
If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module. | |
| 7. |
Probe the appropriate fuel injector control circuit listed below with a test lamp connected to B+. Engine cranking, verify the test lamp flashes. | |
| • |
Injector 1 terminal 3 |
| • |
Injector 2 terminal 6 |
| • |
Injector 3 terminal 4 |
| • |
Injector 4 terminal 7 |
| • |
Injector 5 terminal 5 |
| • |
Injector 6 terminal 8 |
| 8. |
If the test lamp remains OFF, test the control circuit for a high resistance. If the circuit/connections test normal, replace the K20 Engine Control Module. | |
| 9. |
Ignition OFF, test for infinite resistance between the ignition voltage circuit terminal listed below and ground. | |||||||
| • |
Injector 1 terminal 3 |
| • |
Injector 2 terminal 6 |
| • |
Injector 3 terminal 4 |
| • |
Injector 4 terminal 7 |
| • |
Injector 5 terminal 5 |
| • |
Injector 6 terminal 8 |
| 10. |
If not the specified value, repair the ignition voltage, or control circuit, for a short to ground. If the circuits/connections test normal, test or replace the appropriate Q17 fuel injector. | |
| 11. |
Test for 12-16 Ω between the appropriate ignition voltage circuit terminal 1 or 2 and each fuel injector control circuit listed below. | |
| • |
Injector 1 terminal 3 |
| • |
Injector 2 terminal 6 |
| • |
Injector 3 terminal 4 |
| • |
Injector 4 terminal 7 |
| • |
Injector 5 terminal 5 |
| • |
Injector 6 terminal 8 |
| 12. |
If less than the specified range, test for a short between the control circuit and the ignition voltage circuit. If the circuits/connections test normal, test or replace the appropriate Q17 fuel injector. | |
| 13. |
If greater than the specified range, test the ignition voltage, and fuel injector control circuit, for an open/high resistance. If the circuits/connections test normal, test or replace the appropriate Q17 fuel injector. | |
| Repair Instructions |
| • |
Fuel Injector Replacement
| |
| • |
Control Module References for Engine Control Module replacement, setup, and programming | |