Inspection Procedure

1. Check that both of the following conditions are satisfied.
   • The brake fluid level in the brake master cylinder reservoir is correct.
   • The parking brake is released.

   HINT:

   • When the ABS warning light remains illuminated, repair the malfunction in the ABS system first.
   • When the VSC OFF indicator light is blinking, repair the malfunction in the VSC system first.

1. Check if any ABS DTCs are output (See DTC CHECK/CLEAR  ).

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

A: Go to Next Step 

1. Check if the CAN communication system DTC is output (See DIAGNOSIS SYSTEM ).

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B: GO TO CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go to Next Step 

1. Check if the skid control ECU connector is connected securely.

   OK: The connector is connected securely. 

NG: CONNECT CONNECTOR CORRECTLY 

OK: Go to Next Step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream ON.
4. Select Data List mode and check the parking brake switch using the Techstream.

   ABS/VSC/TRAC 

   DATA LIST REFERENCE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Parking Brake SW	Parking brake switch / ON or OFF	ON: Parking brake applied OFF: Parking brake released	-

5. Check that "ON" and "OFF" are properly indicated on the Techstream display when the parking brake lever is operated.

   OK: Techstream display changes in accordance with the parking brake lever operation. 

NG:  Go to step  9

OK: Go to Next Step 

Fig 1: Identifying Brake Master Cylinder Reservoir

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the reservoir tank cap and strainer.
2. Disconnect the A3 switch connector.
3. Measure the resistance according to the value(s) in the table below.

   HINT:

   A float is placed inside the reservoir. Its position can be changed by increasing or decreasing the brake fluid level.

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 (+) - 2 (E)	Float up (Switch OFF)	10 kΩ or higher
   1 (+) - 2 (E)	Float down (Switch ON)	Below 1 Ω

   HINT:

   If the result is as specified, adjust the brake fluid level to the MAX level after measuring the resistance.

NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY 

OK: Go to Next Step 

1. Disconnect the H37 meter connector.
2. Disconnect the A3 switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   A28-14 (SW) - A3-1(+)	Always	Below 1 Ω
   A28-14 (SW) - Body ground	Always	10 kΩ or higher
   A3-2 (E) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying H37 Meter Connector Terminal And A3 Switch Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream ON.
4. Select Active Test mode and operate the BRAKE warning light using the Techstream.

   ABS/VSC/TRAC 

   DATA LIST REFERENCE
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Brake Warning Light	Brake warning light	Warning light ON/OFF	Observe combination meter

5. Check that the BRAKE warning light turns on and off in the combination meter using the Techstream.

   OK: The BRAKE warning light turns ON and OFF in accordance with the Techstream operation. 

NG: GO TO METER / GAUGE SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

OK: REPLACE COMBINATION METER  (See REMOVAL )

1. Disconnect the A5 switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 - Body ground	Parking brake switch ON (Switch pin released)	Below 1 Ω
   1 - Body ground	Parking brake switch OFF (Switch pin pushed in)	10 kΩ or higher

NG: REPLACE PARKING BRAKE SWITCH ASSEMBLY  (See DISASSEMBLY )

Fig 3: Identifying Parking Brake Switch Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the A19 ECU connector.
2. Disconnect the A5 switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   A19-3 (PKB2) - A5-1	Always	Below 1 Ω
   A19-3 (PKB2) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 4: Identifying A19 ECU Connector And Connector Terminal A5 Switch Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE VSC ACTUATOR ASSEMBLY  (See REMOVAL  )