SFI SYSTEM(w/ EGR System), Diagnostic DTC:P1276, P1277, P1278, P1279

DESCRIPTION

The D-4S system has two injection systems. One is the in-cylinder direct injection system that directly injects pressurized fuel into the combustion chamber. The other is the intake port injection system. The ECM determines the percentage of in-cylinder direct injection to intake port injection in accordance with the engine speed and load.

MONITOR DESCRIPTION

The ECM monitors the injection control of the fuel injector (for port injection). If a malfunction is detected in the fuel injector (for port injection) circuit, the ECM cancels the injection control for the corresponding cylinder and illuminates the MIL.

MONITOR STRATEGY

CONFIRMATION DRIVING PATTERN

1. Connect the GTS to the DLC3.

2. Turn the power switch on (IG) and turn the GTS on.

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

4. Turn the power switch off and wait for at least 30 seconds.

5. Turn the power switch on (IG) and turn the GTS on.

6. Put the engine in inspection mode (maintenance mode).

   Click here

7. Start the engine.

8. Idle the engine for 3 minutes or more.

9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

10. Read the DTCs.

    Tip:
    

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

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

11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

12. Input the DTC: P1276, P1277, P1278, P1279.

13. 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 memory limit

    Tip:
    

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

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

    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1276, P1277, P1278 OR P1279)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

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

   5. Read the DTCs.

      
      
      1. Powertrain > Engine and ECT > Trouble Codes
      2. 
         
      3. 
         

      Result
      Result Proceed to P1276, P1277, P1278 or P1279 is output A P1276, P1277, P1278 and P1279 are output B P1276, P1277, P1278 or P1279 and other DTCs are output C

      Tip:

      If any DTCs other than P1276, P1277, P1278 or P1279 are output, troubleshoot those DTCs first.

   
   
   • AClick here
   • BClick here

     GO TO STEP 5

   • C

     GO TO DTC CHARTClick here

2. Click here

   CHECK TERMINAL VOLTAGE (POWER SOURCE VOLTAGE)

   
   
   1. 

      *a	Front view of wire harness connector (to Fuel Injector Assembly (for Port Injection))

      Disconnect the fuel injector assembly (for port injection) connector.

   2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition J1-1 - Body ground Power switch on (IG) 11 to 14 V J2-1 - Body ground Power switch on (IG) 11 to 14 V J3-1 - Body ground Power switch on (IG) 11 to 14 V J4-1 - Body ground Power switch on (IG) 11 to 14 V

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (ECM - FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION))

   
   

   1. Disconnect the ECM connector.

   2. Disconnect the fuel injector assembly (for port injection) connector.

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

      Standard Resistance

      Tester Connection Condition Specified Condition F5-20 (#10) - J1-2 Always Below 1 Ω F5-17 (#20) - J2-2 Always Below 1 Ω F5-18 (#30) - J3-2 Always Below 1 Ω F5-19 (#40) - J4-2 Always Below 1 Ω F5-20 (#10) or J1-2 - Body ground Always 10 kΩ or higher F5-17 (#20) or J2-2 - Body ground Always 10 kΩ or higher F5-18 (#30) or J3-2 - Body ground Always 10 kΩ or higher F5-19 (#40) or J4-2 - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

4. Click here

   INSPECT FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION (RESISTANCE))

   
   

   1. Inspect the fuel injector assembly (for port injection).

      Click here

      Tip:

      Perform "Inspection After Repair" after replacing the fuel injector assembly (for port injection).

      Click here

      Result
      Proceed to OK NG

   
   
   • OK

     REPLACE ECMClick here

   • NG

     REPLACE FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION)Click here

5. Click here

   CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION))

   
   

   1. Disconnect the semiconductor pwr integration ECU connector.

   2. Disconnect the fuel injector assembly (for port injection) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 1G-3 - J1-1 Always Below 1 Ω 1G-3 - J2-1 Always Below 1 Ω 1G-3 - J3-1 Always Below 1 Ω 1G-3 - J4-1 Always Below 1 Ω 1G-3 or J1-1 - Body ground Always 10 kΩ or higher 1G-3 or J2-1 - Body ground Always 10 kΩ or higher 1G-3 or J3-1 - Body ground Always 10 kΩ or higher 1G-3 or J4-1 - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OK

     REPLACE SEMICONDUCTOR PWR INTEGRATION ECUClick here

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR