ECD SYSTEM, Diagnostic DTC:P0263, P0266, P0269, P0272

DTC Code DTC Name
P0263 Cylinder 1 Contribution / Balance
P0266 Cylinder 2 Contribution / Balance
P0269 Cylinder 3 Contribution / Balance
P0272 Cylinder 4 Contribution / Balance

DESCRIPTION

The ECM controls the fuel injection compensation volume when the engine is idling.

If excessive deposits are present in an injector assembly, it may lower the fuel injection volume, resulting in an engine that stalls or has an unstable idle. Therefore, the ECM increases the fuel injection compensation volume to ensure the fuel injection volume necessary for idling.

The ECM stores this DTC if the fuel injection compensation volume exceeds the specified value.

DTC No. DTC Detection Condition Trouble Area

P0263

P0266

P0269

P0272

Conditions (a) and (b) are met more than 200 times with engine speed 500 to 1000 rpm (1 trip detection logic):

(a) Engine coolant temperature: 60°C (140°F) or more

(b) Difference of compensation value between cylinders: 15 mm3/sec. or more

  • Open or short in EDU circuit

  • Injector

  • EDU

  • ECM

  • Compression

Tech Tips

These DTCs indicate a malfunction related to the primary circuit.


  • If DTC P0263 is displayed, check the injector No. 1 circuit.

  • If DTC P0266 is displayed, check the injector No. 2 circuit.

  • If DTC P0269 is displayed, check the injector No. 3 circuit.

  • If DTC P0272 is displayed, check the injector No. 4 circuit.

WIRING DIAGRAM

Refer to DTC P0200 on Click here.

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION DTC P0263, P0266, P0269 AND P272)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON, and turn the tester on.

    3. Enter the following menus: Powertrain / Engine and ECT / DTC.

    4. Read the DTCs.

      Result
      Result Proceed to
      DTC P0263, P0266, P0269 and/or P0272 are output A
      DTC P0263, P0266, P0269 and/or P0272 and any other DTCs are output B

    B

    GO TO DTC CHART

    A

  2. CHANGE TO KNOWN GOOD INJECTOR ASSEMBLY


    1. Change the installed injector assembly to a known good injector assembly.

    2. Input the injector compensation code Click here.


    NEXT

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0263, P0266, P0269 AND P0272)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON, and turn the tester on.

    3. Clear the DTCs Click here.

    4. Warm up the engine.

    5. Enter the following menus: Powertrain / Engine and ECT / DTC.

    6. Read the DTCs.

      Result
      Result Proceed to
      Same DTCs are output (same as DTCs that were cleared) A
      Other DTCs are output B

      Tech Tips


      • If a DTC for a different cylinder is stored when the injector assembly has been switched with a known good one from a different cylinder, the injector assembly may be malfunctioning.

      • If no DTC is stored after the injector assembly has been replaced, the injector assembly may be malfunctioning.

      • If the same DTC is stored again even after replacing the injector assembly with a known good injector assembly, the ECM, injector driver assembly, engine or wire harness may be malfunctioning.


    B

    CHECK MALFUNCTIONING CYLINDER'S INJECTOR ASSEMBLY FOR DEPOSITS Click here

    A

  4. CHECK EDU (INJECTOR RESISTANCE)


    1. A01CJG0E01

      Disconnect the EDU connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      E26-4 (INJ#1) - E26-5 (COM1) 20°C (68°F) 0.35 to 0.55 Ω
      E26-2 (INJ#2) - E26-6 (COM2) 20°C (68°F) 0.35 to 0.55 Ω
      E26-1 (INJ#3) - E26-6 (COM2) 20°C (68°F) 0.35 to 0.55 Ω
      E26-3 (INJ#4) - E26-5 (COM1) 20°C (68°F) 0.35 to 0.55 Ω

    3. Reconnect the EDU connector.


    NG

    INSPECT INJECTOR ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (EDU - ECM)


    1. A01CILAE01

      Disconnect the EDU connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Check for open
      Tester Connection Condition Specified Condition
      E27-6 (IJT#1) - E22-24 (#1) Always Below 1 Ω
      E27-3 (IJT#2) - E22-23 (#2) Always Below 1 Ω
      E27-2 (IJT#3) - E22-22 (#3) Always Below 1 Ω
      E27-5 (IJT#4) - E22-21 (#4) Always Below 1 Ω
      E27-7 (IJF) - E22-25 (INJF) Always Below 1 Ω
      Check for short
      Tester Connection Condition Specified Condition
      E27-6 (IJT#1) or E22-24 (#1) - Body ground Always 10 kΩ or higher
      E27-3 (IJT#2) or E22-23 (#2) - Body ground Always 10 kΩ or higher
      E27-2 (IJT#3) or E22-22 (#3) - Body ground Always 10 kΩ or higher
      E27-5 (IJT#4) or E22-21 (#4) - Body ground Always 10 kΩ or higher
      E27-7 (IJF) or E22-25 (INJF) - Body ground Always 10 kΩ or higher

    4. Reconnect the EDU connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK ECM (OUTPUT VOLTAGE)


    1. A01CJ17E04

      While idling the engine, check the waveform of the ECM connectors using an oscilloscope.

      Standard
      Tester Connection Specified Condition
      E22-24 (#1) - E23-7 (E1) Correct waveform appears as shown
      E22-23 (#2) - E23-7 (E1) Correct waveform appears as shown
      E22-22 (#3) - E23-7 (E1) Correct waveform appears as shown
      E22-21 (#4) - E23-7 (E1) Correct waveform appears as shown
      E22-25 (INJF) - E23-7 (E1) Correct waveform appears as shown
      Result
      Result Proceed to
      #1 to #4 is normal INJF is abnormal A
      #1 to #4 is abnormal INJF is normal B
      #1 to #4 and INJF are normal C

    B

    REPLACE ECM

    C

    CHECK CYLINDER COMPRESSION PRESSURE Click here

    A

    REPLACE EDU

  7. CHECK CYLINDER COMPRESSION PRESSURE


    1. Measure the cylinder compression pressure of the misfiring cylinder Click here.


    NG

    CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

    OK

    CHECK FOR INTERMITTENT PROBLEMS

  8. CHECK MALFUNCTIONING CYLINDER'S INJECTOR ASSEMBLY FOR DEPOSITS


    1. Remove the injector assembly of malfunction cylinder.

    2. Check the injector assembly for any deposits.

      Injector Assembly Condition Proceed to
      Deposits A
      No deposits B

      Tech Tips

      If excessive deposits are present on the head of the injector assembly, a malfunction of something other than the injector assembly has resulted in an increase of the fuel injection compensation volume. First perform the troubleshooting procedure for black smoke.


    B

    REPLACE INJECTOR ASSEMBLY

    A

    GO TO BLACK SMOKE EMITTED

  9. INSPECT INJECTOR ASSEMBLY


    1. A01CHWBE25

      Disconnect the injector assembly connectors.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 0.35 to 0.55 Ω

    3. Reconnect the injector assembly connector.


    NG

    REPLACE INJECTOR ASSEMBLY

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR