DTC P0201-P0204, P0261, P0264, P0267, P0270, or P2146-P2157 LDK with Turbocharger

Diagnostic Instructions

DTC Descriptors

DTC P0201: Injector 1 Control Circuit

DTC P0202: Injector 2 Control Circuit

DTC P0203: Injector 3 Control Circuit

DTC P0204: Injector 4 Control Circuit

DTC P0261: Injector 1 Control Circuit Low Voltage

DTC P0264: Injector 2 Control Circuit Low Voltage

DTC P0267: Injector 3 Control Circuit Low Voltage

DTC P0270: Injector 4 Control Circuit Low Voltage

DTC P2146: Injector Positive Voltage Control Circuit Group 1

DTC P2147: Injector Positive Voltage Control Circuit Group 1 Low Voltage

DTC P2148: Injector Positive Voltage Control Circuit Group 1 High Voltage

DTC P2149: Injector Positive Voltage Control Circuit Group 2

DTC P2150: Injector Positive Voltage Control Circuit Group 2 Low Voltage

DTC P2151: Injector Positive Voltage Control Circuit Group 2 High Voltage

DTC P2152: Injector Positive Voltage Control Circuit Group 3

DTC P2153: Injector Positive Voltage Control Circuit Group 3 Low Voltage

DTC P2154: Injector Positive Voltage Control Circuit Group 3 High Voltage

DTC P2155: Injector Positive Voltage Control Circuit Group 4

DTC P2156: Injector Positive Voltage Control Circuit Group 4 Low Voltage

DTC P2157: Injector Positive Voltage Control Circuit Group 4 High Voltage

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Direct Fuel Injector High Voltage Supply Cylinder 1	P0300, P0301, P0304, P2146, P2155	P0201, P0300, P0301, P0304	P0300, P0301, P0304, P2146, P2155
Direct Fuel Injector High Voltage Supply Cylinder 2	P0300, P0302, P0303, P2149, P2152	P0202, P0300, P0302, P0303	P0300, P0302, P0303, P2149, P2152
Direct Fuel Injector High Voltage Supply Cylinder 3	P0300, P0302, P0303, P2149, P2152	P0203, P0300, P0302, P0303	P0300, P0302, P0303, P2149, P2152
Direct Fuel Injector High Voltage Supply Cylinder 4	P0300, P0301, P0304, P2146, P2155	P0204, P0300, P0301, P0304	P0300, P0301, P0304, P2146, P2155
Direct Fuel Injector High Voltage Control Cylinder 1	P0261, P0300, P0301	P0201, P0300, P0301	P0300, P0301
Direct Fuel Injector High Voltage Control Cylinder 2	P0264, P0300, P0302	P0202, P0300, P0302	P0300, P0302
Direct Fuel Injector High Voltage Control Cylinder 3	P0267, P0300, P0303	P0203, P0300, P0303	P0300, P0303
Direct Fuel Injector High Voltage Control Cylinder 4	P0270, P0300, P0304	P0204, P0300, P0304	P0300, P0304

Circuit/System Description

The engine control module (ECM) supplies voltage to each fuel injector on the injector high voltage supply circuits. The ECM energizes each fuel injector by grounding the high voltage control circuit of that fuel injector. The ECM monitors the status of the injector high voltage supply circuits and the fuel injector high voltage control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector will be disabled.

Conditions for Running the DTC

Conditions for Setting the DTC

The control module detects an incorrect voltage on the high voltage supply circuit or the high voltage control circuit for greater than 1 second.

Action Taken When the DTC Sets

DTCs P0201, P0202, P0203, P0204, P0261, P0264, P0267, P0270, P2146, P2147, P2148, P2149, P2150, P2151, P2152, P2153, P2154, P2155, P2156, and P2157 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0201, P0202, P0203, P0204, P0261, P0264, P0267, P0270, P2146, P2147, P2148, P2149, P2150, P2151, P2152, P2153, P2154, P2155, P2156, and P2157 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Description and Operation

Fuel System Description

Electrical Information Reference

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 Misfire Current Counters with a scan tool. The Misfire Current Counters should not be incrementing.
2. Engine operating, observe the DTC information with a scan tool. DTCs P0201, P0202, P0203, P0204, P0261, P0264, P0267, P0270, P2146, P2147, P2148, P2149, P2150, P2151, P2152, P2153, P2154, P2155, P2156, and P2157 should not set.
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 you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the X145 fuel injector multi-way harness connector.
2. Inspect the X145 fuel injector multi-way harness connector for proper connection, proper terminal contact, and proper terminal retention force.

⇒	If a condition is found, repair the poor connection at the X145 connector.

3. Engine cranking, verify that a test lamp flashes brightly between ground and the high voltage supply circuit terminal, ECM side of the connector, of the appropriate fuel injector listed below.

•	Q17A injector 1 terminal 7

•	Q17B injector 2 terminal 8

•	Q17C injector 3 terminal 9

•	Q17D injector 4 terminal 10

⇒	If the test lamp is always ON, test the appropriate fuel injector high voltage supply circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

⇒	If the test lamp is always OFF, test the appropriate fuel injector high voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.

4. Engine cranking, verify that a test lamp flashes dimly between B+ and the high voltage control circuit terminal, ECM side of the connector, of the appropriate fuel injector listed below.

•	Q17A injector 1 terminal 1

•	Q17B injector 2 terminal 2

•	Q17C injector 3 terminal 3

•	Q17D injector 4 terminal 4

⇒	If the test lamp is always ON, test the appropriate fuel injector high voltage control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.

⇒	If the test lamp is always OFF, test the appropriate fuel injector high voltage control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.

5. Ignition OFF, test for continuity between the suspected high voltage supply circuit and the remaining high voltage supply circuits, engine side of the connector. The DMM should display OL.

•	Q17A injector 1 terminal 7

•	Q17B injector 2 terminal 8

•	Q17C injector 3 terminal 9

•	Q17D injector 4 terminal 10

⇒	If less than the specified value, repair the high voltage supply circuit for a short to the high voltage supply circuit.

6. Ignition OFF, verify that a test lamp does not illuminate between the appropriate high voltage supply circuit terminal listed below, engine side of the connector, and B+.

•	Q17A injector 1 terminal 7

•	Q17B injector 2 terminal 8

•	Q17C injector 3 terminal 9

•	Q17D injector 4 terminal 10

⇒	If the test lamp illuminates, repair the high voltage supply circuit for a short to ground.

7. Ignition OFF, test for continuity between the suspected high voltage control circuit and the high voltage supply circuits listed below, engine side of the connector. The DMM should display OL.

•	Q17A injector 1 terminal 7

•	Q17B injector 2 terminal 8

•	Q17C injector 3 terminal 9

•	Q17D injector 4 terminal 10

⇒	If less than the specified value, repair the high voltage control circuit for a short to the high voltage supply circuit.

8. Ignition OFF, verify that a test lamp does not illuminate between the appropriate high voltage control circuit terminal listed below, engine side of the connector, and B+.

•	Q17A injector 1 terminal 1

•	Q17B injector 2 terminal 2

•	Q17C injector 3 terminal 3

•	Q17D injector 4 terminal 4

⇒	If the test lamp illuminates, repair the high voltage control circuit for a short to ground.

9. Ignition OFF, test for 1.5-4Ω between the appropriate fuel injector high voltage supply circuit terminal and the fuel injector high voltage control circuit terminal, engine side of the connector, of the appropriate fuel injector listed below.

•	Q17A injector 1 terminals 1 and 7

•	Q17B injector 2 terminals 2 and 8

•	Q17C injector 3 terminals 3 and 9

•	Q17D injector 4 terminals 4 and 10

⇒	If the resistance is not within the specified range, test for an open/high resistance between X145 and the appropriate fuel injector harness connector. If the circuits test normal, test or replace the fuel injector.

Component Testing

Verify the resistance of each fuel injector with one of the following methods:

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

DTC P0201-P0204, P0261, P0264, P0267, P0270, or P2146-P2157 LTD without Turbocharger

Diagnostic Instructions

DTC Descriptors

DTC P0201: Injector 1 Control Circuit

DTC P0202: Injector 2 Control Circuit

DTC P0203: Injector 3 Control Circuit

DTC P0204: Injector 4 Control Circuit

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ignition 1 Voltage - Fuse to Splice	¹	²	--	--
Ignition 1 Voltage - Splice to Injector	¹	P0201, P0202, P0203, or P0204	--	--
Fuel Injector 1 Control	P0201, P0300	P0201, P0300	P0201	--
Fuel Injector 2 Control	P0202, P0300	P0202, P0300	P0202	--
Fuel Injector 3 Control	P0203, P0300	P0203, P0300	P0203	--
Fuel Injector 4 Control	P0204, P0300	P0204, P0300	P0204	--
¹Open fuse, cranks no start ²Cranks 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

Conditions for Setting the DTC

Action Taken When the DTC Sets

Conditions for Clearing the DTC

DTCs P0201, P0202, P0203, P0204 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

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 44603 Injector Test Lamp

For equivalent regional tools, refer to Special Tools.

Circuit/System Verification

1. Engine idling, observe the following control circuit status parameters for each fuel injector:

•	INJ Ckt Short Gnd Test Status

•	INJ Ckt Open Test Status

•	INJ Ckt Short Volts Test Status

Each parameter should display OK or Not Run.

2. Engine running, observe the DTC information with a scan tool. DTCs P0201, P0202, P0203, or P0204 should not set.
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 you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate fuel injector.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal A and ground.

⇒	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 fuel injector.

3. Ignition OFF, connect a J 44603 Test Lamp between the control circuit terminal B and the ignition circuit terminal A of the appropriate fuel injector.
4. Engine cranking, the test lamp should flash.

⇒	If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the engine control module (ECM).

⇒	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 ECM.

5. If all circuits test normal, test or replace the fuel injector.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.