METER / GAUGE SYSTEM, Diagnostic DTC:B2660

DTC Code DTC Name
B2660 Steering Wheel Switch Malfunction

DESCRIPTION

This code is output when any steering pad switch is continuously on for a period of 60 seconds.

DTC Code DTC Detection Condition Trouble Area
B2660 The driving support switch control ECU detects a malfunction in the steering pad switch.

  • Harness or connector

  • Driving support switch control ECU

  • Spiral cable sub-assembly

  • Steering pad switch assembly

WIRING DIAGRAM

A01DLWZE01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Operate the intelligent tester according to the display and select the Data List Click here.

      D-SEAT SW
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Steering Wheel Menu Switch MENU switch/OFF or ON OFF: MENU switch off -
      ON: MENU switch on
      Steering Wheel Enter Switch ENTER switch/OFF or ON OFF: ENTER switch off -
      ON: ENTER switch on
      Steering Wheel Up Switch UP/DOWN UP switch/OFF or ON OFF: UP/DOWN UP switch off -
      ON: UP/DOWN UP switch on
      Steering Wheel Down Switch UP/DOWN DOWN switch/OFF or ON OFF: UP/DOWN DOWN switch off -
      ON: UP/DOWN DOWN switch on
      OK
      The value displayed on the intelligent tester changes with the actual steering pad switch operation.

    NG

    INSPECT STEERING PAD SWITCH ASSEMBLY Click here

    OK

    REPLACE DRIVING SUPPORT SWITCH CONTROL ECU Click here

  2. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly Click here.

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

      A01DQG2E01
      Standard Resistance
      Tester Connection Condition Specified Condition
      z8-2 (DISP) - z8-3 (GND1) MENU switch pushed Below 2.5 Ω
      ENTER switch pushed 313 to 346 Ω
      UP/DOWN UP switch pushed 3049 to 3370 Ω
      UP/DOWN DOWN switch pushed 959 to 1060 Ω
      switch off 95 to 105 kΩ
      Text in Illustration
      *a Front view of wire harness connector (to spiral cable sub-assembly)
      *b MENU switch
      *c ENTER switch
      *d UP/DOWN UP switch
      *e UP/DOWN DOWN switch

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  3. INSPECT HARNESS AND CONNECTOR (SPIRAL CABLE - DRIVING SUPPORT SWITCH CONTROL ECU)


    1. Disconnect the G76 driving support switch control ECU connector.

    2. Disconnect the G40 spiral cable connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G40-9 (DISP) - G76-3 (SWI1) Always Below 1 Ω
      G40-10 (GND1) - G76-4 (SWI2) Always Below 1 Ω
      G40-9 (DISP) - G40-2 (ECC) Always 10 kΩ or higher
      G40-9 (DISP) - G40-4 (EAU) Always 10 kΩ or higher
      G40-9 (DISP) -G40-10 (GND1) Always 10 kΩ or higher
      G40-9 (DISP) - Body ground Always 10 kΩ or higher
      G40-10 (GND1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. A01DUF0E01
      Text in Illustration
      *a Connector A
      *b Connector B

      Set the spiral cable to the center position Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-2 - B-9 Always Below 1 Ω
      A-3 - B-10 Always Below 1 Ω
      A-2 - A-3 Always 10 kΩ or higher
      A-2 - A-6 Always 10 kΩ or higher
      A-2 - A-8 Always 10 kΩ or higher
      A-2 - Body ground Always 10 kΩ or higher
      A-3 - Body ground Always 10 kΩ or higher

    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

    REPLACE DRIVING SUPPORT SWITCH CONTROL ECU Click here