Lighting System Stop Light Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE OF INTELLIGENT TESTER

INSPECT FUSE (STOP SW)

INSPECT STOP LIGHT SWITCH

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

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

INSPECT FUSE (STOP LP L, STOP LP R)

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

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

REPLACE REAR COMBINATION LIGHT (STOP LH OR STOP RH)

REPLACE NOISE FILTER

REPLACE CENTER STOP LIGHT

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

CHECK WIRE HARNESS (NOISE FILTER - CENTER STOP LIGHT)

CHECK WIRE HARNESS (CENTER STOP LIGHT - BODY GROUND)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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.
   

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

2. Measure the resistance of the fuse.
   

   Standard resistance:

   Below 1 Ω
   

OK:

Stop light switch is normal.

1. Disconnect the LC junction block connector.
   

2. 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

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

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

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

3. Measure the resistance of the fuses.
   

   Standard resistance:

   Below 1 Ω
   

1. Disconnect the LB junction block connector.
   

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

   Standard voltage:

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

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

2. 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

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

2. Check that the light illuminates.
   

   OK:

   Light illuminates.
   

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

2. Check that the light illuminates.
   

   OK:

   Light illuminates.
   

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

2. Check that the light illuminates.
   

   OK:

   Light illuminates.
   

1. Disconnect the LA junction block connector.
   

2. Disconnect the W17 noise filter connector.
   

3. 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

1. Disconnect the W17 noise filter connector.
   

2. Disconnect the W23 light connector.
   

3. 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

1. Disconnect the W23 light connector.
   

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

   Standard resistance:

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