Inspection Procedure

1. Check that the stop lights come on when the brake pedal is depressed and go off when the brake pedal is released.

   OK 

   STOP LIGHT SWITCH OPERATION CHART
   
   

   Pedal condition	Illumination Condition
   Brake pedal depressed	ON
   Brake pedal released	OFF

   HINT:

   Check the stop light bulbs as they may have burnt out.

NG:  Go to step  4

OK: Go to next step 

1. Disconnect the skid control ECU connector.
Fig 1: Identifying Skid Control ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A4-7 (STP) - Body ground	Stop light switch ON (Brake pedal depressed)	8 to 14 V
   A4-7 (STP) - Body ground	Stop light switch OFF (Brake pedal released)	Below 1.5 V

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   OK (When troubleshooting in accordance with DTC CHART)	A
   OK (When troubleshooting in accordance with PROBLEM SYMPTOMS TABLE)	B
   NG	C

B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

A: Go to next step 

1. Clear the DTC (See DTC CHECK/CLEAR  ).
2. Check if the same DTC is detected (See DTC CHECK/CLEAR  ).

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   DTC output	A
   DTC not output	B

B: END 

A: REPLACE MASTER CYLINDER SOLENOID  (See DISASSEMBLY )

1. Disconnect the stop light switch connector.
Fig 2: Identifying Stop Light Switch Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

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

NG: REPLACE STOP LIGHT SWITCH ASSEMBLY  (See REMOVAL )

OK: Go to next step 

1. Disconnect the skid control ECU connector.
Fig 3: Identifying Skid Control ECU Connector And Stop Light Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the stop light switch connector.
3. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A4-45 (STP2) - A3-1	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Clear the DTC (See DTC CHECK/CLEAR  ).
2. Check if the same DTC is detected (See DTC CHECK/CLEAR  ).

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   DTC output	A
   DTC not output	B

B: END 

A: REPLACE MASTER CYLINDER SOLENOID DISASSEMBLY (See )