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 malfunctions in the ABS system first.

  NEXT 

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

Result 

B : REPAIR CIRCUITS INDICATED BY OUTPUT DTCS  (See DIAGNOSTIC TROUBLE CODE CHART )

A : Go to Next Step 

1. Check if a CAN communication system DTC is output (See HOW TO PROCEED WITH TROUBLESHOOTING ).

Result 

B : REPAIR CAN COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

A : Go to Next Step 

1. Check if the skid control ECU connector is properly installed.

OK: The skid control ECU connector is properly installed. 

NG : CONNECT CONNECTOR TO ECU SECURELY 

OK : Go to Next Step 

1. Disconnect the skid control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A19-1 (GND1) - Body ground	Always	Below 1 Ω
   A19-13 (GND2) - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value(s) in the table below.

Standard Voltage 

Fig 1: Identifying A19 Skid Control ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : Go to Next Step 

1. Using the Data List, check for proper functioning of the parking brake switch.

ABS/VSC/TRAC: 

OK: When the parking brake lever is operated, the display changes as shown above. 

NG : Go to step  10

OK : Go to Next Step 

1. Remove the reservoir tank cap and strainer.
2. Disconnect the brake fluid level warning 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 

HINT:

If there is no problem after the above check is finished, adjust the brake fluid level to the MAX level.

Fig 2: Inspecting Brake Fluid Level Warning Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY  (See DISASSEMBLY )

OK : Go to Next Step 

1. Disconnect the combination meter connector.
2. Disconnect the brake fluid level warning switch connector.
3. Measure the resistance according to the value(s) in the table below.

Standard Resistance 

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Identifying Combination Meter And Brake Fluid Level Warning Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : Go to Next Step 

1. Inspect the combination meter (See HOW TO PROCEED WITH TROUBLESHOOTING ).

NG : REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )

OK : REPLACE BRAKE ACTUATOR ASSEMBLY  (See REMOVAL )

1. Remove the parking brake switch (See ON-VEHICLE INSPECTION ).
2. Measure the resistance according to the value(s) in the table below.

Standard Resistance 

Fig 4: Inspecting Parking Brake Switch Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE PARKING BRAKE SWITCH ASSEMBLY  (See ON-VEHICLE INSPECTION )

OK : Go to Next Step 

1. Disconnect the junction block connector.
2. Disconnect the parking brake switch connector.
3. Measure the resistance according to the value(s) in the table below.

Standard Resistance 

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 5: Identifying Main Body ECU And Parking Brake Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE INSTRUMENT PANEL JUNCTION BLOCK