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 TABLE
   
   

   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 a CAN communication system DTC is output (See DIAGNOSTIC TROUBLE CODE TABLE ).

   Result 

   RESULT TABLE
   
   

   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 

   DIAGNOSTIC NOTE TABLE
   
   

   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 

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 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

   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.

   Fig 1: Identifying Brake Fluid Level Warning Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY 

OK: Go To Next Step 

1. Disconnect the J28 meter connector.
2. Disconnect the A3 switch connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

   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

   Fig 2: Identifying J28 Meter And A3 Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go To Next Step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and the Techstream on.
3. Perform the Active Test of the combination meter (meter CPU) using the Techstream (See DATA LIST/ACTIVE TEST ).

   Combination Meter 

   DIAGNOSTIC NOTE TABLE
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Indicat. Lamp Brake	Brake warning light	ON or OFF	Perform the test with the vehicle stopped and engine idling

4. Check that the BRAKE warning light turns on and off in the combination meter using 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 VSC ACTUATOR ASSEMBLY  (See REMOVAL  )

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

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Switch Condition	Specified Condition
   A5-1 - Body ground	Parking brake switch ON (Switch pin released)	Below 1 Ω
   A5-1 - Body ground	Parking brake switch OFF (Switch pin pushed in)	10 kΩ or higher

   Fig 3: Identifying A5 Parking Brake Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE PARKING BRAKE SWITCH ASSEMBLY  (See DISASSEMBLY )

OK: Go To Next Step 

1. Disconnect the A17 ECU connector.
2. Disconnect the A5 switch connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Condition	Specified Condition
   A17-3 (PKB2) - A5-1	Always	Below 1 Ω
   A17-3 (PKB2) - Body ground	Always	10 kΩ or higher

   Fig 4: Identifying A17 ECU Connector And A5 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE VSC ACTUATOR ASSEMBLY  (See REMOVAL  )