Inspection Procedure

HINT: Start the inspection from step 1 when using the hand-held tester, and start from step 2 when not using the hand-held tester.

PERFORM ACTIVE TEST BY HAND-HELD TESTER (BRAKE WARNING LAMP)

Connect the hand-held tester to the DLC3.
Start the engine.
Select "BRAKE WARN LIGHT" in the ACTIVE TEST and operate the brake warning lamp on the hand-held tester.
Check that "ON" and "OFF" of the brake warning lamp is shown on the combination meter by the hand-held tester.

VEHICLE CONDITION / TEST DETAILS REFERENCE

Item	Vehicle Condition / Test Details	Diagnostic Note
BRAKE WRN LIGHT	Turns brake warning lamp ON / OFF	Observe combination meter

NG : Go to step 7
OK : GO TO NEXT STEP.

CHECK DTC FOR ABS

Check if the DTCs are detected (see DTC CHECK/CLEAR ).

Result:

RESULT REFERENCE

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

B : Go to step 3
A : REPAIR CIRCUIT INDICATED BY OUTPUT CODE

INSPECT PARKING BRAKE SWITCH ASSY

Remove the parking brake switch.
Measure the resistance according to the table below.

Standard:

SWITCH CONDITION AND SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified condition
P4-1 - Ground part	Not pushed	10 kΩ or higher
P4-1 - Ground part	Pushed	Below 1 Ω

Fig 1: Inspecting Parking Brake Switch Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE PARKING BRAKE SWITCH ASSY
OK : GO TO NEXT STEP.

CHECK WIRE HARNESS (SKID CONTROL ECU - PARKING BRAKE SWITCH ASSY)

Disconnect the skid control ECU connector and the parking brake switch connector.
Measure the resistance according the table below.

Standard:

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
S1-28 (PKB) - P4-1 (PKB)	Below 1 Ω
S1-28 (PKB) - Body ground	10 kΩ or higher

Fig 2: Disconnecting Skid Control ECU Connector & Parking Brake Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR
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 table below.

Standard:

SWITCH CONDITION AND SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified condition
B2-1 - B2-2	Float UP	10 kΩ or higher
B2-1 - B2-2	Float DOWN	Below 1 Ω

Fig 3: Inspecting Brake Fluid Level Warning Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSY
OK : GO TO NEXT STEP.

CHECK WIRE HARNESS (BRAKE FLUID LEVEL WARNING SWITCH - COMBINATION METER)

Disconnect the combination meter connector and the brake fluid level warning switch connector.
Measure the resistance according to the table below.

Standard:

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
C11-15 - B2-1	Below 1 Ω
C11-15 - Body ground	10 kΩ or higher

Fig 4: Disconnecting Combination Meter Connector & Brake Fluid Level Warning Switch Connector

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR
OK : GO TO NEXT STEP.

CHECK WIRE HARNESS (SKID CONTROL ECU - COMBINATION METER)

Disconnect the combination meter connector and the skid control connector.
Measure the resistance according to the table below.

Standard:

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
S1-44 (BRL) - C11-14	Below 1 Ω
S1-44 (BRL) - Body ground	10 kΩ or higher

Fig 5: Checking Wire Harness (Skid Control ECU - Combination Meter)

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR
OK : REPLACE BRAKE ACTUATOR ASSY (See REPLACEMENT )

NOTE: When replacing the brake actuator assy, perform the zero point calibration (see CALIBRATION ).