• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage |
---|---|---|---|
Ignition 1 Voltage - Odd Coils Fuse to Splice | P0201, P0203, P0205, P0207¹ | P0201, P0203, P0205, P0207¹ | -- |
Ignition 1 Voltage - Even Coils Fuse to Splice | P0202, P0204, P0206, P0208¹ | P0202, P0204, P0206, P0208¹ | -- |
Ignition 1 Voltage - Splice to Injectors | ¹ ² | ² | -- |
Fuel Injector 1 Control | P0201 | P0201 | P0201 |
Fuel Injector 2 Control | P0202 | P0202 | P0202 |
Fuel Injector 3 Control | P0203 | P0203 | P0203 |
Fuel Injector 4 Control | P0204 | P0204 | P0204 |
Fuel Injector 5 Control | P0205 | P0205 | P0205 |
Fuel Injector 6 Control | P0206 | P0206 | P0206 |
Fuel Injector 7 Control | P0207 | P0207 | P0207 |
Fuel Injector 8 Control | P0208 | P0208 | P0208 |
¹Open fuse ²Sets individual injector DTC |
The control module enables the appropriate fuel injector pulse for each cylinder. Ignition voltage is supplied to the fuel injectors. The control module controls each fuel injector by grounding the control circuit via a solid state device called a driver. The control module monitors the status of each driver. If the control module detects an incorrect voltage for the commanded state of the driver, a fuel injector control circuit DTC sets.
• | The engine is running. |
• | The ignition voltage is more than 11 volts for 5 seconds. |
• | DTCs P0201-P0208 run continuously when the above conditions are met. |
• | The control module detects an incorrect voltage on the fuel injector control circuit. |
• | The above condition is met for 1 second. |
DTCs P0201-P0208 are Type B DTCs.
DTCs P0201-P0208 are Type B DTCs.
Performing the Fuel Injector Diagnosis may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis.
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
J 34730-405 Injector Test Lamp
With the engine running, observe the scan tool cylinder injector circuit status parameters in Misfire Data. The parameters should display OK.
⇒ | If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance. |
⇒ | If the test lamp flashes, replace the fuel injector. |
⇒ | If the test lamp does not flash, test for an open, high resistance, or a short to voltage in the control circuit of the fuel injector. If the circuit tests normal, replace the ECM. |
⇒ | If the test lamp remains illuminated at all times, test for a short to ground in the control circuit of the fuel injector. If the circuit tests normal, replace the ECM. |
Note: The engine coolant temperature (ECT) sensor must be between 10-32°C (50-90°F) for an accurate measurement.
Measure for 11-14 ohms between the terminals of the injector.
⇒ | If the resistance is not within the specified range, replace the injector. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming |