SFI SYSTEM, Diagnostic DTC:P1276, P1277, P1278, P1279, P127A, P127B, P127C, P127D

DTC Code DTC Name
P1276 Port Injector Circuit No. 1
P1277 Port Injector Circuit No. 2
P1278 Port Injector Circuit No. 3
P1279 Port Injector Circuit No. 4
P127A Port Injector Circuit No. 5
P127B Port Injector Circuit No. 6
P127C Port Injector Circuit #7
P127D Port Injector Circuit #8

DESCRIPTION

The D-4S (Direct injection 4-stroke gasoline engine Superior) has two fuel injection systems. One is the port fuel injection system. The other is the direct fuel injection system.

The port fuel injector is supplied with battery voltage (12 V). When the internal transistor of the engine control module (ECM) turns on, the port fuel injector sprays fuel.

DTC No. DTC Detection Condition Trouble Area

P1276

P1277

P1278

P1279

P127A

P127B

P127C

P127D

 Current is not applied to the fuel injector (for Port Injection) more than 10 times with the engine running.

  • Open or short in fuel injector (for Port Injection) circuit

  • Fuel Injector (for Port Injection)

  • ECM

MONITOR DESCRIPTION

To monitor the port injector circuit, the ECM counts the number of times the injection fails. If the count reaches 10 times, the ECM interprets this as a malfunction. The ECM illuminates the malfunction indicator lamp (MIL) and sets the diagnosis trouble code (DTC) immediately.

WIRING DIAGRAM

A000WBIE01
A000UZLE01

CAUTION / NOTICE / HINT

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1276, P1277, P1278, P1279, P127A, P127B, P127C OR P127D)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the tester ON.

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

    5. Read DTCs.

      Result
      Display (DTC Output) Proceed to
      P1276, P1277, P1278, P1279, P127A, P127B, P127C or P127D A
      P1276, P1277, P1278, P1279, P127A, P127B, P127C or P127D and other DTCs B

    B

    GO TO DTC CHART Click here

    A

  2. CHECK FUEL INJECTOR (for Port Injection) (POWER SOURCE VOLTAGE)


    1. Disconnect the fuel injector (for Port Injection) connector.

      A000UHNE02

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      z48-2 - Body ground Power switch on (IG) 11 to 14 V
      z44-2 - Body ground Power switch on (IG) 11 to 14 V
      z49-2 - Body ground Power switch on (IG) 11 to 14 V
      z45-2 - Body ground Power switch on (IG) 11 to 14 V
      z50-2 - Body ground Power switch on (IG) 11 to 14 V
      z46-2 - Body ground Power switch on (IG) 11 to 14 V
      z51-2 - Body ground Power switch on (IG) 11 to 14 V
      z47-2 - Body ground Power switch on (IG) 11 to 14 V

    NG

    CHECK AND REPAIR HARNESS OR CONNECTOR (INJ FUSE - FUEL INJECTOR (for Port Injection))

    OK

  3. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR (for Port Injection) - ECM)


    1. Disconnect the E2 and E4 ECM connectors.

    2. Disconnect the fuel injector (for Port Injection) connector.

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

      Standard resistance (Check for open)
      Tester Connection Condition Specified Condition
      z48-1 - E4-17 (#10) Always Below 1 Ω
      z44-1 - E2-11 (#20) Always Below 1 Ω
      z49-1 - E4-16 (#30) Always Below 1 Ω
      z45-1 - E2-10 (#40) Always Below 1 Ω
      z50-1 - E4-15 (#50) Always Below 1 Ω
      z46-1 - E2-9 (#60) Always Below 1 Ω
      z51-1 - E4-14 (#70) Always Below 1 Ω
      z47-1 - E2-8 (#80) Always Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Condition Specified Condition
      z48-1 or E4-17 (#10) - Body ground Always 10 kΩ or higher
      z44-1 or E2-11 (#20) - Body ground Always 10 kΩ or higher
      z49-1 or E4-16 (#30) - Body ground Always 10 kΩ or higher
      z45-1 or E2-10 (#40) - Body ground Always 10 kΩ or higher
      z50-1 or E4-15 (#50) - Body ground Always 10 kΩ or higher
      z46-1 or E2-9 (#60) - Body ground Always 10 kΩ or higher
      z51-1 or E4-14 (#70) - Body ground Always 10 kΩ or higher
      z47-1 or E2-8 (#80) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK FUEL INJECTOR (for Port Injection) (RESISTANCE)


    1. Check the fuel injector (for Port Injection) resistance Click here.


    OK

    REPLACE ECM Click here

    NG

    REPLACE FUEL INJECTOR (for Port Injection) Click here