SFI SYSTEM, Diagnostic DTC:P1642 and P263B

DTC Code DTC Name
P1642 Open Circuit on the MIL Signal
P263B MIL Control Circuit High

DESCRIPTION

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

The MIL operation can be checked visually. When the ignition switch is turned to ON, the MIL should be illuminated and should then turn off after the engine is started.

When there is a communication malfunction between the ECM and combination meter assembly, the ECM stores this DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P1642

Open Circuit on the MIL Signal

Open in MIL circuit.

  • Combination meter

  • Wire harness or connector

  • ECM

Does not Come on

DTC stored

P263B

MIL Control Circuit High

Short to +B in MIL circuit.

  • Combination meter

  • Wire harness or connector

  • ECM

Does not Come on

DTC stored

WIRING DIAGRAM

A331046E01

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1642 OR P263B)

    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. Check for DTCs.

      Powertrain > Engine > Trouble Codes

      Result

      Result

      Proceed to

      DTC P1642 or P263B is output

      A

      DTC P1642 or P263B and other DTCs are output

      B
      Tip:

      If any DTCs other than P1642 or P263B are output, troubleshoot those DTCs first.

    B

    GO TO DTC CHART

    Click here

    A

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

    1. Disconnect the combination meter assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E12-23 - A35-10 (W)

      Always

      Below 1 Ω

      E12-23 or A35-10 (W) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE COMBINATION METER ASSEMBLY

    1. Replace the combination meter assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P1642 OR P263B)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for a few minutes.

    6. Perform the drive test.

    7. Turn the ignition switch to ON.

    8. Turn the GTS on.

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

    10. Check for DTCs.

      Powertrain > Engine > Trouble Codes

    Result

    Result

    Proceed to

    DTC P1642 or P263B are output

    A

    DTCs are not output

    B
    A

    REPLACE ECM

    Click here

    B

    END