Inspection Procedure

INSPECT STOP LAMP
1. Check that the stop lamp comes on when the brake pedal is depressed and goes off when the brake pedal is released.
1. NG: Go to step 3
2. OK: GO TO NEXT STEP.
INSPECT SUSPENSION CONTROL ECU
1. Remove the suspension control ECU with connectors being connected.
2. Measure voltage between terminal S19-12 (STP) and S20-1 (GND) of the suspension control ECU when stop lamp switch assy switch is ON and OFF.
  Standard:
  
  Fig 1: Voltage Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Measuring Voltage Between Terminal S19-12 (STP) And S20-1 (GND) Of Suspension Control ECU
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:

NG:

Repair or replace the harness or the connector between the stop lamp switch assy and the suspension control ECU.
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: GO TO NEXT STEP.
  CHECK AND REPLACE SUSPENSION CONTROL ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )
INSPECT STOP LAMP SWITCH ASSY
1. Disconnect the stop lamp switch assy connector.
2. Check continuity between terminal 1 and 2 of the stop lamp switch assy.
  Standard:
  
  Fig 3: Switch Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Checking Continuity Between Terminal 1 And 2 Of Stop Lamp Switch Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE STOP LAMP SWITCH ASSY
2. OK: GO TO NEXT STEP.
INSPECT SUSPENSION CONTROL ECU
1. Remove the suspension control ECU with connectors being connected.
2. Measure voltage between terminal S19-12 (STP) and S20-1 (GND) of the suspension control ECU when stop lamp switch assy switch pin is free and pushed in.
  Standard:
  
  Fig 5: Voltage Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 6: Measuring Voltage Between Terminal S19-12 (STP) And S20-1 (GND) Of Suspension Control ECU
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:

NG:

Repair or replace the harness or the connector between the STOP fuse and the suspension control ECU.
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: GO TO NEXT STEP.
  CHECK AND REPLACE SUSPENSION CONTROL ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )