Inspection Procedure

NOTE: When replacing the ABS and TRACTION actuator assembly, perform zero point calibration (see CALIBRATION ).

CHECK DTC

Check if the ABS and/or VSC DTC is output (see DTC CHECK / CLEAR ).

Result

RESULT CHART

Display (DTC Output)	Proceed To
DTC is not output	A
DTC is output	B (see DIAGNOSTIC TROUBLE CODE CHART )

B: REPAIR CIRCUIT INDICATED BY OUTPUT CODE

A: Go to next step

INSPECT CAN COMMUNICATION SYSTEM

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

Result

RESULT CHART

Display (DTC Output)	Proceed To
DTC is not output	A
DTC is output	B

B: REPAIR CAN COMMUNICATION SYSTEM

A: Go to next step

INSPECT MULTIPLEX COMMUNICATION SYSTEM

Check if the multiplex communication system DTC is output (see DTC CHECK / CLEAR ).

Result

RESULT CHART

Display (DTC Output)	Proceed To
DTC is not output	A
DTC is output	B

B: REPAIR MULTIPLEX COMMUNICATION SYSTEM

A: Go to next step

INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED
1. Check if the skid control ECU connector is securely connected.
  OK:
  
  The connector should be securely connected.
NG: CONNECT CONNECTOR TO ECU CORRECTLY

OK: Go to next step
INSPECT BATTERY
1. Check the battery voltage.
  Voltage:
  
  11 to 14 V
NG: INSPECT CHARGING SYSTEM

OK: Go to next step

INSPECT SKID CONTROL ECU (IG1 TERMINAL)

Disconnect the skid control ECU connector.
Turn the engine switch on (IG).

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

Voltage

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Condition	Specified Condition
A44-46 (IG1) - Body ground	Engine switch on (IG)	10 to 14 V

Fig 1: Identifying Skid Control ECU (IG1 Terminal) Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)

OK: Go to next step

INSPECT SKID CONTROL ECU (GND TERMINAL)

Disconnect the skid control ECU connector.

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

Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Specified Condition
A44-1 (GND2) - Body ground	Below 1 Ω
A44-32 (GND1) - Body ground	Below 1 Ω

Fig 2: Identifying Skid Control ECU (GND Terminal) Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

OK: Go to next step

INSPECT PARKING BRAKE SWITCH

Disconnect the parking brake switch connector.

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

Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Condition	Specified Condition
A31-1 - Body ground	Parking brake switch ON (Switch pin free)	Below 1 Ω
A31-1 - Body ground	Parking brake switch OFF (Switch pin pushed in)	10 kΩ or higher

Fig 3: Inspecting Parking Brake Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE PARKING BRAKE SWITCH

OK: Go to next step

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU TO PARKING BRAKE SWITCH)

Disconnect the skid control ECU connector and parking brake switch.

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

Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Specified Condition
A44-28 (PKB) - A31-1	Below 1 Ω
A44-28 (PKB) - Body ground	10 kΩ higher

Fig 4: Identifying Skid Control ECU And Parking Brake Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (PKB CIRCUIT)

OK: Go to next step

INSPECT BRAKE FLUID LEVEL WARNING SWITCH

Remove the reservoir tank cap and strainer.
Disconnect the brake fluid level warning switch connector.

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/decreasing the level of brake fluid.

Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Condition	Specified Condition
A22-1 - A22-2	Float up (Switch OFF)	1.9 to 2.1 kΩ
A22-1 - A22-2	Float down (Switch ON)	Below 1 Ω

Fig 5: Inspecting Brake Fluid Level Warning Switch

HINT:

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

NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY

OK: Go to next step

INSPECT HARNESS AND CONNECTOR (BRAKE FLUID LEVEL WARNING SWITCH TO COMBINATION METER)

Disconnect the combination meter connector.

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

Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Specified Condition
K31-28 - A22-1	Below 1 Ω
K31-28 - Body ground	10 kΩ or higher
A22-2 - Body ground	Below 1 Ω

Fig 6: Inspecting Harness And Connector (Brake Fluid Level Warning Switch To Combination Meter)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (BRAKE FLUID LEVEL WARNING SWITCH CIRCUIT)

OK: Go to next step

INSPECT COMBINATION METER ASSEMBLY
1. Check the combination meter assembly (see INITIALIZATION ).
  HINT:
  
  If troubleshooting has been carried out according to the problem symptoms table, refer back to the table and proceed to the next step before replacing the part (see PROBLEM SYMPTOMS TABLE ).
NG: REPLACE COMBINATION METER ASSEMBLY

OK: REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY