SFI SYSTEM, Diagnostic DTC:P062D, P1261, P1262, P1263, P1264

DESCRIPTION

The D-4S system has two fuel injection methods. One is the in-cylinder direct injection method that directly injects pressurized fuel into the combustion chamber. The other is the intake port injection method. The ECM determines which fuel injection method to use in accordance with the engine conditions. For the in-cylinder direction injection method, the injector driver (EDU) in the engine room operates the fuel injectors (for direction injection) at high speeds. The EDU receives fuel injection request signals from the ECM and converts the signals to high voltage / high current injector operation signals to operate the fuel injectors (for direction injection).

The fuel injection sequence occurs in numerical order from No. 1 to No. 4.

The ECM monitors the EDU at all times. If drivers or fuel injectors are malfunctioning, the EDU sends fuel injector operation condition signals (fail signals IJF1 to IJF2) to the ECM. When the ECM receives the signals, the ECM stops the fuel injection control of the appropriate cylinders, cuts voltage to the appropriate injector relay, and illuminates the MIL.

CONFIRMATION DRIVING PATTERN

1. Connect the GTS to the DLC3.

2. Turn the ignition switch to ON and turn the GTS on.

3. Record the Freeze Frame Data.

4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) Click here.

5. Turn the ignition switch off and wait for at least 30 seconds.

6. Turn the ignition switch to ON and turn the GTS on.

7. Based on engine speed, engine load and other freeze frame data stored in the ECM, reproduce the conditions present when the DTC was stored.

8. Enter the following menus: Powertrain / Engine / Trouble Codes.

9. Read the DTC.

   Tech Tips

   
   

   • If a DTC is output, the system is malfunctioning.

   • If a DTC is not output, perform the following procedure.

10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

11. Input the DTC: P062D, P1261, P1262, P1263 or P1264.

12. Check the DTC judgment result.

    GTS Display	Description
    NORMAL	DTC judgment completed System normal
    ABNORMAL	DTC judgment completed System abnormal
    INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
    N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

    Tech Tips

    
    

    • If the judgment result shown ABNORMAL, the system has a malfunction.

    • If the judgment result shows NORMAL, the system is normal.

13. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips

    
    

    • If a permanent DTC is output, the system is malfunctioning.

    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK DTC OUTPUT

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

   4. Enter the following menus: Powertrain / Engine / Trouble Codes.

   5. Read the DTCs.

      Result
      Result Proceed to P1261, P1262, P1263 and/or P1264 are output A DTC P062D is output B

   
   

   B

   CHECK HARNESS OR CONNECTOR (ECM - INJECTOR DRIVER (EDU)) Click here

   A

2. CHECK HARNESS AND CONNECTOR

   
   

   1. Disconnect the injector driver (EDU) connectors.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition C3-2 (IJ1-) - C3-5 (IJ1+) 20°C (68°F) 1.74 to 2.04 Ω C4-1 (IJ2-) - C4-4 (IJ2+) 20°C (68°F) 1.74 to 2.04 Ω C3-1 (IJ3-) - C3-4 (IJ3+) 20°C (68°F) 1.74 to 2.04 Ω C4-3 (IJ4-) - C4-6 (IJ4+) 20°C (68°F) 1.74 to 2.04 Ω

      Tech Tips

      The standard values shown are fuel injector assembly resistance values.

      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition C3-2 (IJ1-) or C3-5 (IJ1+) - Body ground 20°C (68°F) 1 MΩ or higher C4-1 (IJ2-) or C4-4 (IJ2+) - Body ground 20°C (68°F) 1 MΩ or higher C3-1 (IJ3-) or C3-4 (IJ3+) - Body ground 20°C (68°F) 1 MΩ or higher C4-3 (IJ4-) or C4-6 (IJ4+) - Body ground 20°C (68°F) 1 MΩ or higher

   
   

   NG

   INSPECT FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Click here

   OK

3. CHECK HARNESS AND CONNECTOR (ECM - INJECTOR DRIVER (EDU))

   
   

   1. Disconnect the ECM connectors.

   2. Disconnect the injector driver (EDU) connector.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition A36-14 (#1) - C1-3 (IJT1) Always Below 1 Ω A36-25 (#2) - C1-12 (IJT2) Always Below 1 Ω A36-24 (#3) - C1-11 (IJT3) Always Below 1 Ω A36-23 (#4) - C1-2 (IJT4) Always Below 1 Ω

      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition A36-14 (#1) or C1-3 (IJT1) - Body ground Always 10 kΩ or higher A36-25 (#2) or C1-12 (IJT2) - Body ground Always 10 kΩ or higher A36-24 (#3) or C1-11 (IJT3) - Body ground Always 10 kΩ or higher A36-23 (#4) or C1-2 (IJT4) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CLEAR DTC

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

   4. Clear the DTCs Click here.

   5. Turn the ignition switch off and wait for at least 30 seconds.

   
   

   NEXT

5. CHECK ECM (ECM OUTPUT VOLTAGE)

   
   

   1. Disconnect the injector driver (EDU) connector.

   2. 

      Text in Illustration

      *a	Component with harness connected (ECM)

      Inspect the ECM using an oscilloscope.

      
      

      1. While cranking the engine, check waveform the terminals of the ECM connector.

         Standard
         Signal waveform appears as shown in the illustration.

         ECM Terminal Name	A36-14 (#1) or A36-23 (#4) - Body ground A36-25 (#2) or A36-24 (#3) - Body ground
         Tester Range	2 V/DIV., 4 ms./DIV.
         Condition	Cranking

   
   

   OK

   REPLACE INJECTOR DRIVER (EDU) Click here

   NG

   REPLACE ECM Click here

6. CHECK HARNESS OR CONNECTOR (ECM - INJECTOR DRIVER (EDU))

   
   

   1. Disconnect the ECM connector.

   2. Disconnect the injector driver (EDU) connector.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition A34-11 (IJF1) - C1-6 (IJF1) Always Below 1 Ω A34-31 (IJF2) - C1-5 (IJF2) Always Below 1 Ω

      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition A34-11 (IJF1) or C1-6 (IJF1) - Body ground Always 10 kΩ or higher A34-31 (IJF2) or C1-5 (IJF2) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. CHECK TERMINAL VOLTAGE (ECM OUTPUT VOLTAGE)

   
   

   1. Disconnect the injector driver (EDU) connector.

   2. 

      Text in Illustration

      *a	Component with harness connected (ECM)

      Inspect the ECM using an oscilloscope.

      
      

      1. While start the engine, check waveform the terminals of the ECM connector.

         Standard
         Signal waveform appears as shown in the illustration.

         ECM Terminal Name	A34-11 (IJF1) - Body ground A34-31 (IJF2) - Body ground
         Tester Range	2 V/DIV., 4 ms./DIV.
         Condition	Idling

   
   

   OK

   REPLACE INJECTOR DRIVER (EDU) Click here

   NG

   REPLACE ECM Click here

8. INSPECT FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION)

   
   

   1. Inspect the resistance of the fuel injector (for direct injection) Click here.

   
   

   OK

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   NG

   REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Click here