ECD SYSTEM(for Swirl Control Valve) MIL Circuit

DTC Code DTC Name
MIL Circuit

DESCRIPTION

The MIL (Malfunction Indicator Lamp) is used to indicate vehicle malfunctions detected by the ECM.

When the ignition switch is turned to ON, power is supplied to the MIL circuit, and the ECM provides the circuit ground, which illuminates the MIL.

The MIL operation can be checked visually. When the ignition switch is first turned to ON, the MIL should be illuminated and should then turn off when the engine is started. If the MIL remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the GTS.

WIRING DIAGRAM

A311437E01

CAUTION / NOTICE / HINT

Note:

  • When replacing the ECM, the ECM needs Registration and Initialization (Click here).

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tip:

When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

PROCEDURE

  1. CHECK THAT MIL IS ILLUMINATED

    1. Perform troubleshooting in accordance with the table below.

      Table 1. Result

      Result

      Proceed to

      MIL remains on

      A

      MIL does not illuminate

      B

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)Click here

  2. CHECK WHETHER MIL TURNS OFF

    1. Connect the GTS to the DLC3.

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

    3. Check if DTCs have been stored (Click here). If DTCs are output, write them down.

    4. Clear DTCs (Click here).

    5. Check that the MIL turns off.

      OK

      MIL turns off.

    REPLACE CIRCUITS INDICATED BY OUTPUT DTCS

  3. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)

    1. U121924E02

      Disconnect the ECM connector.

    2. Turn the ignition switch to ON.

    3. Check that MIL is not illuminated.

      OK

      MIL is not illuminated.

      Table 2. Text in Illustration

      *a

      Front view of wire harness connector

      (to ECM)

    REPLACE ECM

    (Click here)

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

    1. Disconnect the ECM connector.

    2. Disconnect the combination meter assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H62-29 (EFI) or A76-59 (W) - Body ground

      Always

      10 kΩ or higher

    REPLACE COMBINATION METER ASSEMBLY

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

    1. Disconnect the ECM connector.

    2. Disconnect the combination meter assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H62-29 (EFI) - A76-59 (W)

      Always

      Below 1 Ω

    REPLACE COMBINATION METER ASSEMBLY

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR