METER / GAUGE SYSTEM, Diagnostic DTC:B1504

DTC Code DTC Name
B1504 Lost Communication with Steering SW

DESCRIPTION

The combination meter assembly (No. 3 meter circuit plate) communicates with the multi-information switch (steering pad switch assembly) via a direct line . If the combination meter assembly (No. 3 meter circuit plate) detects a communication malfunction, it stores this DTC.

DTC No. DTC Detection Condition Trouble Area
B1504

When the IG voltage is 9.5 V or more and power switch on (IG) and the following condition is detected:


  1. Multi-information switch (steering pad switch assembly) communication error has been detected for more than 3 seconds.

  • Wire Harness or Connector

  • Spiral Cable

  • Steering pad switch RH

  • Steering pad switch LH

  • Combination Meter Assembly

WIRING DIAGRAM

A01J9MWE02

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (MULTI DISPLAY SELECT SWITCH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Combination Meter / Data List.

    5. Check the values by referring to the table below.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Multi Display Select Switch DISP switch in the steering pad switch assembly/OFF or ON OFF: DISP switch in the multi-information switch (steering pad switch assembly) not pressed -
      ON: DISP switch in the multi-information switch (steering pad switch assembly) pressed -
      Drive Monitor Reset SW TRIP switch in the steering pad switch assembly/OFF or ON OFF: TRIP switch in the steering pad switch assembly not pressed -
      ON: TRIP switch in the steering pad switch assembly pressed more than 1 second -
      OK
      Multi-information switch (steering pad switch assembly) condition displayed on the intelligent tester changes with the actual switch operation.

    NG

    CHECK SPIRAL CABLE Click here

    OK

    REPLACE COMBINATION METER ASSEMBLY (NO. 3 METER CIRCUIT PLATE) Click here

  2. CHECK SPIRAL CABLE


    1. Check the spiral cable Click here.


    NG

    REPLACE SPIRAL CABLE Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 3 METER CIRCUIT PLATE - STEERING PAD SWITCH RH)


    1. Disconnect the L27 and z9 connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      z9-2 (IG) - Body ground Power switch off Below 1 V
      z9-2 (IG) - Body ground Power switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z9-7 (DISP) - L27-29 (STRG) Always Below 1 Ω
      L27-29 (STRG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE STEERING PAD SWITCH RH


    1. Replace the steering pad switch RH with a new or a known good one Click here.

      OK
      The operation of the combination meter assembly (No. 3 meter circuit plate) returns to normal.

    NG

    REPLACE STEERING PAD SWITCH LH Click here

    OK

    END

  5. REPLACE STEERING PAD SWITCH LH


    1. Replace the steering pad switch LH with a new or a known good one Click here.

      OK
      The operation of the combination meter assembly (No. 3 meter circuit plate) returns to normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY (NO. 3 METER CIRCUIT PLATE) Click here

    OK

    END