Inspection Procedure

CHECK DTC

Check if the ABS DTC is output (See DTC CHECK / CLEAR ).

Result

RESULT CHART

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

B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

A: Go to next step

INSPECT SKID CONTROL ECU CONNECTOR SECURELY CONNECTED
1. Check the skid control ECU connector's connecting condition.
  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.
  Standard voltage:
  
  10 to 14 V
NG: INSPECT CHARGING SYSTEM

OK: Go to next step

INSPECT SKID CONTROL ECU (IG1 TERMINAL VOLTAGE)

Disconnect the skid control ECU connector.
Turn the ignition switch to the on position.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
S3-3 (IG1) - Body ground	Ignition switch ON (IG)	10 to 14 V

Fig 1: Identifying Skid Control ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

OK: Go to next step

INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY)

Disconnect the skid control ECU connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
S3-1 (GND1) - Body ground	Below 1 Ω
S3-23 (GND2) - Body ground	Below 1 Ω

Fig 2: Identifying Skid Control ECU Connector Terminals

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.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
P6-1 - Body ground	Parking brake switch ON (Switch pin free)	Below 1 Ω
P6-1 - 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

Disconnect the skid control ECU connector and parking brake switch.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
S3-12 (PKB) - P6-1	Below 1 Ω
S3-12 (PKB) - Body ground	10 kΩ or higher

Fig 4: Identifying Skid Control ECU 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.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
B1-1 - B1-2	Float up (Switch OFF)	1.9 to 2.1 kΩ
B1-1 - B1-2	Float down (Switch ON)	Below 1 Ω

HINT:

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

Fig 5: Checking Brake Fluid Level Warning Switch

NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY

OK: Go to next step

INSPECT HARNESS AND CONNECTOR (BETWEEN BRAKE FLUID LEVEL WARNING SW AND COMBINATION METER)

Disconnect the combination meter connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
C10-13 - B1-1	Below 1 Ω
C10-13 - Body ground	10 kΩ or higher
B1-2 - Body ground	Below 1 Ω

Fig 6: Identifying Brake Fluid Level Warning Switch Connector Terminals

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

OK: Go to next step

CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND COMBINATION METER ASSEMBLY)

Turn the ignition switch off.
Disconnect the combination meter connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
S3-19 (BRL) - C10-14	Below 1 Ω
S3-19 (BRL) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 7: Identifying Skid Control ECU Connector Terminals And Combination Meter Assembly Connector Terminals

OK: Go to next step

INSPECT COMBINATION METER ASSEMBLY
1. Check the combination meter assembly (See HOW TO PROCEED WITH TROUBLESHOOTING ).
  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.
NG: REPLACE COMBINATION METER ASSEMBLY

OK: REPLACE BRAKE ACTUATOR ASSEMBLY