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PRE-RELEASE

DTC P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270, or P0271 (LLU)

DTC P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270, or P0271 (LLU)

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 00

Cylinder 1 Injector Control Circuit

DTC P0202 00

Cylinder 2 Injector Control Circuit

DTC P0203 00

Cylinder 3 Injector Control Circuit

DTC P0204 00

Cylinder 4 Injector Control Circuit

DTC P0261 00

Cylinder 1 Injector Control Circuit Low Voltage

DTC P0262 00

Cylinder 1 Injector Control Circuit High Voltage

DTC P0264 00

Cylinder 2 Injector Control Circuit Low Voltage

DTC P0265 00

Cylinder 2 Injector Control Circuit High Voltage

DTC P0267 00

Cylinder 3 Injector Control Circuit Low Voltage

DTC P0268 00

Cylinder 3 Injector Control Circuit High Voltage

DTC P0270 00

Cylinder 4 Injector Control Circuit Low Voltage

DTC P0271 00

Cylinder 4 Injector Control Circuit High Voltage

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Ignition Voltage - Fuse to Splice

1

2

-

-

Ignition Voltage - Splice to Injector

1

P0201 00, P0202 00, P0203 00, P0204 00

-

-

Control Injector 1

P0261 00

P0201 00

P0262 00

-

Control Injector 2

P0264 00

P0202 00

P0265 00

-

Control Injector 3

P0267 00

P0203 00

P0268 00

-

Control Injector 4

P0270 00

P0204 00

P0271 00

-

1. Open fuse, cranks no start

2. Cranks no start



Circuit/System Description

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.

Conditions for Running the DTC


• DTCs P0628 00 or P0629 00 are not set.

• The battery voltage is greater than 9 V.

• The engine speed is greater that 40 RPM.

• All fuel injectors are active.

• These DTCs run continuously when the above conditions are met


Conditions for Setting the DTC


• The control module detects an incorrect voltage on the fuel injector control circuit.

• The above condition is met for 0.5 s.


Action Taken When the DTC Sets

DTCs P0201 00, P0202 00, P0203 00, P0204 00, P0261 00, P0262 00, P0264 00, P0265 00, P0267 00, P0268 00, P0270 00, and P0271 00 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0201 00, P0202 00, P0203 00, P0204 00, P0261 00, P0262 00, P0264 00, P0265 00, P0267 00, P0268 00, P0270 00, and P0271 00 are Type B DTCs.

Diagnostic Aids

Performing the fuel injector diagnosis may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis .

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

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 Testing


1. Ignition OFF, disconnect the harness connector at the appropriate Q17A Fuel Injector 1, Q17B Fuel Injector 2, Q17C Fuel Injector 3, or Q17D Fuel Injector 4.

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.

3. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test or replace the appropriate Q17 Fuel Injector.

4. Ignition OFF, connect a test lamp between the control circuit terminal 2 and the ignition circuit terminal 1 of Q17A Fuel Injector 1, Q17B Fuel Injector 2, Q17C Fuel Injector 3, or Q17D Fuel Injector 4.

5. Engine cranking, the test lamp should flash.

6. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.

7. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

8. If all circuits test normal, test or replace the Q17A Fuel Injector 1, Q17B Fuel Injector 2, Q17C Fuel Injector 3, or Q17D Fuel Injector 4.


Component Testing


Static Test

1. Ignition OFF, disconnect the harness connector at the appropriate Q17A Fuel Injector 1, Q17B Fuel Injector 2, Q17C Fuel Injector 3, or Q17D Fuel Injector 4.

2.
Note

The engine coolant temperature (ECT) sensor must be between 10-32°C (50-90°F) in order for an accurate measurement.


Test for 11-14 Ω between the ignition voltage terminal A and the control terminal B.

3. If not within the specified range, replace the Q17A Fuel Injector 1, Q17B Fuel Injector 2, Q17C Fuel Injector 3, or Q17D Fuel Injector 4.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Fuel Injector Replacement

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


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