LIGHTING SYSTEM > Stop Light Circuit

for Preparation Click here


DESCRIPTION

The multiplex network rear ECU receives stop light switch information from the stop light switch and turns on the stop light.

WIRING DIAGRAM


E109554E02


E109555E02


INSPECTION PROCEDURE

1.READ VALUE OF INTELLIGENT TESTER

  1. Select the Data List, use the intelligent tester to generate a control command, and then check that the stop light illuminates.

    Multiplex network rear ECU:

    Item
    		Measurement Item / Display (Range)
    		Normal Condition
    		Diagnostic Note
    Stop Light Switch
    		Stop light switch / ON or OFF
    		ON: Brake pedal depressed
    OFF: Brake pedal released
    		-

    OK:
    Each light illuminates.



OK
Go to step 5
NG


2.INSPECT FUSE (STOP SW)

  1. Remove the STOP SW fuse from the cowl side junction block RH.

  1. Measure the resistance of the fuse.

    Standard resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


3.INSPECT STOP LIGHT SWITCH
Inspection (Click here)

OK:
Stop light switch is normal.



NG
REPLACE STOP LIGHT SWITCH
OK


4.CHECK WIRE HARNESS (NO. 1 JUNCTON BLOCK - BATTERY)


    E108569E03

  1. Disconnect the LC junction block connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    LC-32 (STP1) - Body ground
    		Brake pedal is depressed
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the stop light illuminates.

    Multiplex network rear ECU:

    Item
    		Test Details
    		Diagnostic Note
    Stop Light
    		Stop light ON / OFF
    		-
    High mount stop light
    		High mount stop light ON / OFF
    		-


    Result:

    Result
    		Proceed to
    OK
    		A
    Both do not illuminate
    		B
    Combination light (stop LH or stop RH) does not illuminate
    		C
    High mount stop light does not illuminate
    		D



B
Go to step 6

C
Go to step 8

D
Go to step 10
A

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

6.INSPECT FUSE (STOP LP L, STOP LP R)

  1. Remove the STOP LP L fuse from the No. 1 junction block.

  1. Remove the STOP LP R fuse from the No. 1 junction block.

  1. Measure the resistance of the fuses.

    Standard resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


7.CHECK WIRE HARNESS (NO. 1 JUNCTION BLOCK - BATTERY)


    E108484E09

  1. Disconnect the LB junction block connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    LB-1 - Body ground
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

8.CHECK WIRE HARNESS (NO. 1 JUNCTION BLOCK - LIGHT (STOP LH OR STOP RH) - BODY GROUND)


    E108482E14

  1. Check the wire harness between the rear combination light (stop LH) and No. 1 junction block, and the rear combination light (stop LH) and body ground.

    1. Disconnect the LG junction block connector.

    2. Disconnect the Z1 light connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance:
      Tester Connection
      		Specified Condition
      LG-7 (STP2) - Z1-7 (STP)
      		Below 1 Ω
      LG-7 (STP2) or Z1-7 (STP) - Body ground
      		10 kΩ or higher

    4. Connect the LG junction block connector.

    5. Measure the resistance of the wire harness side connector.

      Standard resistance:
      Tester Connection
      		Specified Condition
      Z1-6 (E) - Body ground
      		Below 1 Ω



    E108482E15

  1. Check the wire harness between the rear combination light (stop RH) and No. 1 junction block, and the rear combination light (stop RH) and body ground.

    1. Disconnect the LG junction block connector.

    2. Disconnect the Z3 light connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance:
      Tester Connection
      		Specified Condition
      LG-2 (STP3) - Z3-2 (STP)
      		Below 1 Ω
      LG-2 (STP3) or Z3-2 (STP) - Body ground
      		10 kΩ or higher

    4. Connect the LG junction block connector.

    5. Measure the resistance of the wire harness side connector.

      Standard resistance:
      Tester Connection
      		Specified Condition
      Z3-6 (E) - Body ground
      		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


9.REPLACE REAR COMBINATION LIGHT (STOP LH OR STOP RH)

  1. Temporarily replace the rear combination light (stop LH or stop RH) with a new or normally functioning one.

  1. Check that the light illuminates.

    OK:
    Light illuminates.



OK
END
NG

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

10.REPLACE NOISE FILTER

  1. Temporarily replace the noise filter with a new or normally functioning one.

  1. Check that the light illuminates.

    OK:
    Light illuminates.



OK
END
NG


11.REPLACE CENTER STOP LIGHT

  1. Temporarily replace the center stop light with a new or normally functioning one.

  1. Check that the light illuminates.

    OK:
    Light illuminates.



OK
END
NG


12.CHECK WIRE HARNESS (NO. 1 JUNCTION BLOCK - NOISE FILTER)


    E109843E01

  1. Disconnect the LA junction block connector.

  1. Disconnect the W17 noise filter connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    LA-4 (STP1) - W17-2
    		Below 1 Ω
    LA-4 (STP1) or W17-2 - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


13.CHECK WIRE HARNESS (NOISE FILTER - CENTER STOP LIGHT)


    E109844E03

  1. Disconnect the W17 noise filter connector.

  1. Disconnect the W23 light connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    W17-1 - W23-1
    		Below 1 Ω
    W17-1 or W23-1 - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


14.CHECK WIRE HARNESS (CENTER STOP LIGHT - BODY GROUND)


    E109845E04

  1. Disconnect the W23 light connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    W23-2 - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE