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 

   BRAKE PEDAL CONDITION 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.
2. Measure the voltage.

   Standard Voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   S1-7 (STP) - Body ground	Stop light switch ON (Brake pedal depressed)	8 to 14 V
   S1-7 (STP) - Body ground	Stop light switch OFF (Brake pedal released)	Below 1.5 V

3. Reconnect the skid control ECU connector.
   Fig 1: Identifying Skid Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   RESULT REFERENCE
   
   

   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 DTCs (See DTC CHECK/CLEAR  ).
2. Check if the same DTCs are detected.
   DTC OUTPUT REFERENCE
   
   

   Result	Proceed To
   DTC output	A
   DTC not output	B

B: END 

A: REPLACE MASTER CYLINDER SOLENOID 

1. Disconnect the stop light switch connector.
2. Measure the resistance.

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

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

3. Reconnect the stop light switch connector.

NG: REPLACE STOP LIGHT SWITCH ASSEMBLY 

Fig 2: Inspecting Stop Light Switch Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go To Next Step 

1. Remove the STOP LP CTRL relay from the engine room R/B and J/B.
2. Measure the resistance.

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   3 - 4	Below 1 Ω
   3 - 5	10 kΩ or higher

3. Apply the battery voltage between terminals 1 (+) and 2 (-).
4. Measure the resistance.

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   3 - 4	10 kΩ or higher
   3 - 5	Below 1 Ω

5. Reinstall the STOP LP CTRL relay.

NG: REPLACE STOP LIGHT CONTROL RELAY 

OK: Go To Next Step 

1. Disconnect the skid control ECU connector.
2. Disconnect the stop light switch connector.
3. Measure the resistance.

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   S1-45 (STP2) - S10-1 (STP)	Below 1 Ω

4. Reconnect the stop light switch connector.
5. Reconnect the skid control ECU connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Identifying Skid Control ECU & Stop Light Switch Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go To Next Step 

1. Clear the DTCs (See DTC CHECK/CLEAR  ).
2. Check if the same DTCs are detected.
   DTC OUTPUT REFERENCE
   
   

   Result	Proceed To
   DTC output	A
   DTC not output	B

B: END 

A: REPLACE MASTER CYLINDER SOLENOID