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DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277

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

DTC P0201

Cylinder 1 Injector Control Circuit

DTC P0202

Cylinder 2 Injector Control Circuit

DTC P0203

Cylinder 3 Injector Control Circuit

DTC P0204

Cylinder 4 Injector Control Circuit

DTC P0205

Cylinder 5 Injector Control Circuit

DTC P0206

Cylinder 6 Injector Control Circuit

DTC P0261

Cylinder 1 Injector Control Circuit Low Voltage

DTC P0262

Cylinder 1 Injector Control Circuit High Voltage

DTC P0264

Cylinder 2 Injector Control Circuit Low Voltage

DTC P0265

Cylinder 2 Injector Control Circuit High Voltage

DTC P0267

Cylinder 3 Injector Control Circuit Low Voltage

DTC P0268

Cylinder 3 Injector Control Circuit High Voltage

DTC P0270

Cylinder 4 Injector Control Circuit Low Voltage

DTC P0271

Cylinder 4 Injector Control Circuit High Voltage

DTC P0273

Cylinder 5 Injector Control Circuit Low Voltage

DTC P0274

Cylinder 5 Injector Control Circuit High Voltage

DTC P0276

Cylinder 6 Injector Control Circuit Low Voltage

DTC P0277

Cylinder 6 Injector Control Circuit High Voltage

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

The control module enables the appropriate fuel injector on the intake stroke for each cylinder. The ignition voltage is supplied directly to the fuel injectors. The control module controls each fuel injector by grounding the control circuit with a solid state device called a driver. The control module monitors the status of each driver. Each driver has a feedback voltage circuit which the Engine Control Module (ECM) monitors. The injector control circuits are pulled-up to voltage within the ECM. The ECM can determine if a control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

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

P0201, P0202, P0203, P0204, P0205, or P0206

The ECM detects the injector control circuit is open for greater than 4 s or for a cumulative of 50 s.

P0261, P0264, P0267, P0270, P0273, or P0276

The ECM detects the injector control circuit is shorted to ground for greater than 4 s or for a cumulative of 50 s.

P0262, P0265, P0268, P0271, P0274, or P0277

The ECM detects the injector control circuit is shorted to voltage for greater than 4 s or for a cumulative of 50 s.

Action Taken When the DTC Sets

DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277 are Type B DTCs.

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

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Fuel System Description

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

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.
Note

Testing for steps 2 through 4 is performed on the ECM side of the multi-way harness connector.


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.
Note

Testing for steps 5 and 6 is performed on the fuel injector side of the multi-way harness connector. It may be necessary to remove the intake manifold to isolate the condition.


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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Fuel Injector Replacement

• Control Module References for Engine Control Module replacement, setup, and programming