Inspection Procedure

1. Disconnect brake master stroke simulator cylinder connector,
2. Measure the resistance of the cylinder.

   Standard resistance 

   STANDARD RESISTANCE REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   B17-1 (BSR) - B17-2(BCSS)	22.3 to 38 Ω

NG: REPLACE BRAKE MASTER STROKE SIMULATOR CYLINDER ASSEMBLY 

Fig 1: Inspecting Brake Master Stroke Simulator Cylinder Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Connect the brake master stroke simulator cylinder connector.
2. Measure the voltage of the connector.

   HINT:

   Measure the voltage from the behind the connector with the connector connected.

   Standard voltage 

   STANDARD VOLTAGE CHART
   
   

   Tester Connection	Condition	Specified Condition
   B17-1 (BSR) - Body ground	Power switch ON (READY)	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 2: Identifying Brake Master Stroke Simulator Cylinder Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Select the ACTIVE TEST mode on the intelligent tester.

   Skid control ECU 

   SKID CONTROL ECU SPECIFICATION
   
   

   Item	Test Details	Diagnostic Note
   SCC PATTERN	Stroke simulator cut valve pattern activation ON/OFF	Operation of solenoid (clicking sound) can be heard

2. Use the ACTIVE TEST commands shown below to turn the stroke simulator cylinder ON or OFF, and measure the voltage of the SCSS terminal.

   Standard voltage 

   STANDARD VOLTAGE CHART
   
   

   Tester Connection	Condition	Specified Condition
   S7-13 (SCSS) - Body ground	Brake master stroke simulator cylinder ON	Below 1.5 V
   S7-13 (SCSS) - Body ground	Brake master stroke simulator cylinder OFF	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 3: Checking Skid Control ECU (SCSS Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE SKID CONTROL ECU