METER / GAUGE SYSTEM, Diagnostic DTC:B1504

DTC Code DTC Name
B1504 Lost Communication with Steering SW

DESCRIPTION

The combination meter sub-assembly communicates with the steering pad switch RH via a direct line. If the combination meter assembly 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. Steering pad switch RH communication error has been detected for more than 3 seconds.

  • Wire harness or connector

  • Spiral cable with sensor sub-assembly

  • Steering pad switch RH

  • Combination meter sub-assembly (Meter circuit plate)

WIRING DIAGRAM

A005A6DE03
*a to IG2 Relay
*b Steering Pad Switch RH
*c Spiral Cable with Sensor Sub-assembly
*d Combination Meter Sub-assembly (Meter Circuit Plate)

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. READ VALUE USING GTS (MULTI DISPLAY SELECT SWITCH, DRIVE MONITOR RESET SW)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / 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 (Steering pad switch assembly) / OFF or ON OFF: DISP switch not pressed -
      ON: DISP switch pressed
      Drive Monitor Reset SW TRIP switch (Steering pad switch assembly) / OFF or ON OFF: TRIP switch not pressed -
      ON: TRIP switch pressed
      OK
      Steering pad switch RH condition displayed on the GTS changes with the actual switch operation.

    OK

    REPLACE METER CIRCUIT PLATE Click here

    NG

  2. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


    1. Disconnect the L52 and z9 spiral cable with sensor sub-assembly connectors.

      A005BWBE03

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L52-3 (TX1) - z9-7 Always Below 1 Ω
      L52-9 (IG) - z9-2 Always Below 1 Ω
      Text in Illustration
      *a

      Component without harness connected

      (Spiral Cable with Sensor Sub-assembly)

    NG

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - IG2 RELAY)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L52-9 (IG) - Body ground Power switch off Below 1 V
      L52-9 (IG) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER SUB-ASSEMBLY - STEERING PAD SWITCH RH)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L27-10 (STRG) - L52-3 (TX1) Always Below 1 Ω
      L27-10 (STRG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. 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 sub-assembly returns to normal.

    OK

    END

    NG

    REPLACE METER CIRCUIT PLATE Click here