LIGHTING SYSTEM Door Courtesy Switch Circuit

DTC Code DTC Name
Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU receives a door open/closed signal from each door courtesy light switch.

WIRING DIAGRAM

E190149E08
E190149E09

PROCEDURE

  1. READ VALUE USING INTELLIGENT TESTER (DOOR COURTESY LIGHT SWITCH)

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Data List.

    5. According to the display on the intelligent tester, read the Data List.

      Table 1. Main Body

      Tester Display

      Measurement Item/Range

      Normal Condition

      Diagnostic Note

      D Door Courtesy SW

      Driver side door courtesy light switch signal / ON or OFF

      ON: Driver side door courtesy light switch on

      OFF: Driver side door courtesy light switch off

      -

      P Door Courtesy SW

      Front passenger side door courtesy light switch signal / ON or OFF

      ON: Front passenger side door courtesy light switch on

      OFF: Front passenger side door courtesy light switch off

      -

      RL Door Courtesy SW

      Rear door courtesy light switch LH signal / ON or OFF

      ON: Rear door courtesy light switch LH on

      OFF: Rear door courtesy light switch LH off

      -

      RR Door Courtesy SW

      Rear door courtesy light switch RH signal / ON or OFF

      ON: Rear door courtesy light switch RH on

      OFF: Rear door courtesy light switch RH off

      -
      Table 2. Result

      Result

      Proceed to

      OK

      A

      NG (Front door courtesy light switch LH does not operate)

      B

      NG (Front door courtesy light switch RH does not operate)

      C

      NG (Rear door courtesy light switch LH does not operate)

      D

      NG (Rear door courtesy light switch RH does not operate)

      E

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RHClick here

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LHClick here

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RHClick here

  2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

    1. E179464E17

      Remove the front door courtesy light switch LH (Click here).

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      1 - Switch body

      Not pushed

      Below 1 Ω

      Pushed

      10 kΩ or higher

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

    (Click here)

  3. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH LH - MAIN BODY ECU)

    1. U123718E02

      Disconnect the N30 front door courtesy light switch LH connector.

    2. Disconnect the DA main body ECU connector.

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

      Standard Resistance

      for LHD

      Tester Connection

      Condition

      Specified Condition

      N30-1 - DA-21 (DCTY)

      Always

      Below 1 Ω

      N30-1 - Body ground

      Always

      10 kΩ or higher

      for RHD

      Tester Connection

      Condition

      Specified Condition

      N30-1 - DA-24 (PCTY)

      Always

      Below 1 Ω

      N30-1 - Body ground

      Always

      10 kΩ or higher
      Table 3. Text in Illustration

      *1

      Front view of wire harness connector

      (to Front Door Courtesy Light Switch LH)

      *2

      Front view of wire harness connector

      (to Main Body ECU)

      *3

      for LHD

      *4

      for RHD

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

    1. E179464E18

      Remove the front door courtesy light switch RH (Click here).

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      1 - Switch body

      Not pushed

      Below 1 Ω

      Pushed

      10 kΩ or higher

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

    (Click here)

  5. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH RH - MAIN BODY ECU)

    1. U123776E02

      Disconnect the O20 front door courtesy light switch RH connector.

    2. Disconnect the DE*1 or DC*2 main body ECU connector.

      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance

      for LHD

      Tester Connection

      Condition

      Specified Condition

      O20-1 - DE-20 (PCTY)

      Always

      Below 1 Ω

      O20-1 - Body ground

      Always

      10 kΩ or higher

      for RHD

      Tester Connection

      Condition

      Specified Condition

      O20-1 - DC-6 (DCTY)

      Always

      Below 1 Ω

      O20-1 - Body ground

      Always

      10 kΩ or higher
      Table 4. Text in Illustration

      *1

      for LHD

      *2

      for RHD

      *3

      Front view of wire harness connector

      (to Front Door Courtesy Light Switch RH)

      *4

      Front view of wire harness connector

      (to Main Body ECU)

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

    1. E179464E19

      Remove the rear door courtesy light switch LH (Click here).

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      1 - Switch body

      Not pushed

      Below 1 Ω

      Pushed

      10 kΩ or higher

    REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

    (Click here)

  7. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH LH - MAIN BODY ECU)

    1. U123720E02

      Disconnect the N31 rear door courtesy light switch LH connector.

    2. Disconnect the H79 main body ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      N31-1 - H79-8 (LCTY)

      Always

      Below 1 Ω

      N31-1 - Body ground

      Always

      10 kΩ or higher
      Table 5. Text in Illustration

      *1

      Front view of wire harness connector

      (to Rear Door Courtesy Light Switch LH)

      *2

      Front view of wire harness connector

      (to Main Body ECU)

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

    1. E179464E20

      Remove the rear door courtesy light switch RH (Click here).

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      1 - Switch body

      Not pushed

      Below 1 Ω

      Pushed

      10 kΩ or higher

    REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

    (Click here)

  9. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH RH - MAIN BODY ECU)

    1. U123722E02

      Disconnect the O21 rear door courtesy light switch RH connector.

    2. Disconnect the DE main body ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      O21-1 - DE-19 (RCTY)

      Always

      Below 1 Ω

      O21-1 - Body ground

      Always

      10 kΩ or higher
      Table 6. Text in Illustration

      *1

      Front view of wire harness connector

      (to Rear Door Courtesy Light Switch RH)

      *2

      Front view of wire harness connector

      (to Main Body ECU)

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPAIR OR REPLACE HARNESS OR CONNECTOR