SFI SYSTEM (w/o Electronic Throttle Control System), Diagnostic DTC:P0261, P0262, P0264, P0265, P0267, P0268

DTC Code DTC Name
P0261 Cylinder 1 Injector Circuit Low
P0262 Cylinder 1 Injector Circuit High
P0264 Cylinder 2 Injector Circuit Low
P0265 Cylinder 2 Injector Circuit High
P0267 Cylinder 3 Injector Circuit Low
P0268 Cylinder 3 Injector Circuit High

DESCRIPTION

The injectors are installed in the intake manifold, and inject fuel into the cylinders based on the signals from the ECM.

DTC No. DTC Detection Condition Trouble Area

P0261

P0264

P0267

 Open or short to GND in injector circuit (3 trip detection logic)

  • Open or short to GND in injector circuit

  • Injector

  • ECM

P0262

P0265

P0268

 Short in power source circuit (3 trip detection logic)

  • Short in injector power source circuit

  • Injector

  • ECM

Tech Tips


  • These DTCs are detected when the engine idles for approximately 15 seconds.

  • If DTC P0261 or P0262 is displayed, check No. 1 injector circuit.

  • If DTC P0264 or P0265 is displayed, check No. 2 injector circuit.

  • If DTC P0267 or P0268 is displayed, check No. 3 injector circuit.

WIRING DIAGRAM

A0136A1E01

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following 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 help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ECM - INJECTOR)


    1. A01365PE01

      Disconnect the injector connectors.

    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
      B25-47 (#1) - B7-1 (Injector) Always Below 1 Ω
      B25-48 (#2) - B8-1 (Injector) Always Below 1 Ω
      B25-67 (#3) - B9-1 (Injector) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B25-47 (#1) or B7-1 (Injector) - Body ground Always 10 kΩ or higher
      B25-48 (#2) or B8-1 (Injector) - Body ground Always 10 kΩ or higher
      B25-67 (#3) or B9-1 (Injector) - Body ground Always 10 kΩ or higher

    4. Reconnect the injector connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT FUEL INJECTOR (RESISTANCE)


    1. Inspect the injector resistance.


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

        Standard resistance
        11.6 to 12.4 Ω at 20°C (68°F)

    NG

    REPLACE FUEL INJECTOR Click here

    OK

    REPLACE ECM Click here