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 page shown in the brackets (See PROBLEM SYMPTOMS TABLE ).

1. READ VALUE OF TECHSTREAM (STOP LIGHT SWITCH) 
   1. Connect Techstream to the DLC3.
   2. Turn the power switch on (IG).
   3. Check the DATA LIST for proper functioning of the stop light switch.

   Main Body: 

   DATA LIST AND MAIN BODY
   
   

   Tester Display	Measurement Item / Range	Normal Condition	Diagnostic Note
   Stop Light SW	Stop light switch/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:  Go to step  4

   OK: Go to Next Step 

2. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) 
   1. Delete the DTCs (See DTC CHECK / CLEAR ).
   2. Check for CAN communication system DTCs (See HOW TO PROCEED WITH TROUBLESHOOTING ).

      HINT:

      If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first (See DIAGNOSIS SYSTEM ).

   OK: 

   No DTC is output. 

   NG:  Go to CAN COMMUNICATION SYSTEM 1

   OK: Go to Next Step 

3. CHECK DTC OUTPUT (HYBRID CONTROL SYSTEM) 
   1. Delete the DTCs (See DTC CHECK / CLEAR ).
   2. Check for hybrid control system DTCs (See DIAGNOSTIC TROUBLE CODE CHART ).

   OK: 

   No DTC is output. 

   NG:  Go to HYBRID CONTROL SYSTEM

   OK: REPLACE MAIN BODY ECU 

4. INSPECT FUSE (STOP) 
   1. Remove the STOP fuse from the instrument panel J/B.
   2. Measure the resistance of the fuse.

   Standard resistance: 

   Below 1 Ω 

   NG: REPLACE FUSE 

   OK: Go to Next Step 

5. CHECK WIRE HARNESS (BATTERY - MAIN BODY ECU) 
   1. Disconnect the IL ECU connector.
   2. Measure the voltage according to the value (s) in the table below.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   IL-7 - Body ground	Brake pedal released	Below 1 V
   IL-7 - Body ground	Brake pedal depressed	10 to 14 V

   Fig 1: Identifying Wire Harness (Battery - Main Body ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   NG: Go to Next Step 

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

   Standard resistance 

   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 2: View Of Stop Light Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE STOP LIGHT SWITCH 

   OK: REPLACE MAIN BODY ECU