Inspection Procedure

HINT:

Before performing the inspection, depress the brake pedal and check that the stop lights come on. If the stop lights do not come on when the brake pedal is depressed, refer to the article shown in the brackets (See PROBLEM SYMPTOMS TABLE ).

1. CHECK DTC OUTPUT (MULTIPLEX NETWORK COMMUNICATION SYSTEM) 
   1. Delete the DTC (See DIAGNOSIS SYSTEM  ).
   2. Check for the multiplex network communication system DTCs B1210, B1214 and B1215.

      HINT:

      If the DTCs for the multiplex network communication system malfunction are output, inspect those DTCs first (See DTC CHECK/CLEAR ).

      OK: 

      No DTC is output. 

   NG:  GO TO MULTIPLEX COMMUNICATION SYSTEM

   OK: Go to Next Step 

2. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) 
   1. Delete the DTC (See DIAGNOSIS SYSTEM  ).
   2. Check for the CAN communication system DTC U0146.

      HINT:

      If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first (See HOW TO PROCEED WITH TROUBLESHOOTING ).

      OK: 

      No DTC is output. 

   NG:  GO TO CAN COMMUNICATION SYSTEM

   OK: Go to Next Step 

3. INSPECT FUSE (STOP SW) 
   1. Remove the STOP SW fuse from the cowl side J/B RH.
   2. Measure the resistance of the fuse.

      Standard resistance: 

      Below 1 Ω 

   NG: REPLACE FUSE 

   OK: Go to Next Step 

4. CHECK CONNECTORS 
   1. Check that the connectors are securely connected and the terminals are not deformed or loose.

      OK: 

      The connectors are securely connected and the terminals are not deformed or loose. 

   NG: REPAIR OR REPLACE CONNECTORS 

   OK: Go to Next Step 

5. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BODY GROUND) 
   1. Disconnect the ECU connector.
   2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION
      
      

      Tester Connection (Symbols)	Condition	Specified Condition
      J55-6 (GND2) - Body ground	Always	Below 1 Ω

   Fig 1: Identifying Terminal GND2 Of J55 Power Source Control ECU Connector
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

6. CHECK WIRE HARNESS (BATTERY - POWER SOURCE CONTROL ECU) 
   1. Measure the volage according to the value (s) in the table below.

      Standard voltage 

      STANDARD VOLTAGE SPECIFICATION
      
      

      Tester Connection (Symbols)	Condition	Specified Condition
      J55-1 (STP) - Body ground	Brake pedal released	Below 1 V
      J55-1 (STP) - Body ground	Brake pedal depressed	10 to 14 V

   Fig 2: Identifying Terminal STP Of J55 Power Source Control ECU Connector
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK:  Go to step  8

   NG: Go to Next Step 

7. INSPECT STOP LIGHT SWITCH 
   1. Remove the switch.
   2. Measure the resistance of the switch.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      1 - 2	Switch pin free	Below 1 Ω
      3 - 4	Switch pin free	10 kΩ or higher
      1 - 2	Switch pin pushed in	10 kΩ or higher
      3 - 4	Switch pin pushed in	Below 1 Ω

   Fig 3: Inspecting Stop Light Switch
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE STOP LIGHT SWITCH 

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

8. READ VALUE OF TECHSTREAM (STOP LIGHT SWITCH) 
   1. Reconnect the connectors.
   2. Check the DATA LIST for proper functioning of the stop light switch.

      Body: 

      TESTER DISPLAY REFERENCE
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Stop Light SW	Stop light switch 1/ ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

      OK: 

      ON (brake pedal depressed) and OFF (brake pedal released) appear on the screen. 

   NG: REPLACE POWER SOURCE CONTROL ECU 

   OK: REPLACE ECM