Inspection Procedure

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

HINT:

When releasing the parking brake, set the chocks to hold the vehicle for safety.

CHECK BRAKE FLUID
Check that the brake fluid level is proper.

NG: ADD BRAKE FLUID

OK: Go to next step.
INSPECT SKID CONTROL ECU CONNECTOR
1. Check the ECU connector's connecting condition.
OK: The connector should be securely connected.

NG: CONNECT CONNECTOR TO ECU

OK: Go to next step.
CHECK DTC FOR ABS
Are the DTCs recorded? (see DTC CHECK/CLEAR )

NO: Go to step 4

YES: REPAIR CIRCUIT INDICATED BY OUTPUT CODE (SEE DIAGNOSTIC TROUBLE CODE CHART )

INSPECT BRAKE WARNING LIGHT

WHEN USING HAND-HELD TESTER:

Connect the hand-held tester to the DLC3.
Start the engine.

Select the "BRAKE WARN LIGHT" in the ACTIVE TEST and operate the brake warning light by the hand-held tester.

CONDITION REFERENCE

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

Check that "ON" and "OFF" of the brake warning light are indicated on the combination meter when using the hand-held tester.

OK: The brake warning light turns on or off in accordance with the hand-held tester.

WHEN NOT USING HAND-HELD TESTER:

Turn the ignition switch off.
Disconnect the skid control ECU connector.
Turn the ignition switch to the ON position.
Check that the brake warning light.

OK: The brake warning light comes on.

NG: Go to step 5

OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT )

INSPECT PARKING BRAKE SWITCH ASSY

Remove the parking brake switch assy connector.
Measure the resistance according to the value (s) in the table below.

Standard:

RESISTANCE CONDITION (1 OF 8)

Tester Connection	Switch Condition	Specified Condition
P4-1 - Ground part	Released	Below 1 Ω
P4-1 - Ground part	Pushed in	10 kΩ or higher

Fig 1: Measuring Resistance

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE PARKING BRAKE SWITCH ASSY

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH - DAYTIME RUNNING LIGHT RELAY)

Disconnect the daytime running light relay connector and parking brake switch assy connector.
Measure the resistance according to the value (s) in the table below.

Standard:

RESISTANCE CONDITION (2 OF 8)

Tester Connection	Specified Condition
D2-11 (PKB) - P4-1 (PKB)	Below 1 Ω
P4-1 (PKB) - Body ground	10 kΩ or higher

Fig 2: Identifying Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

INSPECT DAYTIME RUNNING LIGHT RELAY (SEE ON-VEHICLE INSPECTION )
1. Check the daytime running light relay.
NG: REPLACE DAYTIME RUNNING LIGHT RELAY

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (DAYTIME RUNNING LIGHT RELAY - SKID CONTROL ECU)

Disconnect the skid control ECU connector and daytime running light relay connector.
Measure the resistance according to the value (s) in the table below.

Standard:

RESISTANCE CONDITION (3 OF 8)

Tester Connection	Specified Condition
D2-10 (BRK) - S1 -28 (PKB)	Below 1 Ω
S1-28 (PKB) - Body ground	10 kΩ or higher

Fig 3: Identifying Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR 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 value (s) in the table below.

Standard:

RESISTANCE CONDITION (4 OF 8)

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 4: 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 HARNESS AND CONNECTOR (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 value (s) in the table below.

Standard:

RESISTANCE CONDITION (5 OF 8)

Tester Connection	Specified Condition
(C11-12)- (B2-1)	Below 1 Ω

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

Standard:

RESISTANCE CONDITION (6 OF 8)

Tester Connection	Specified Condition
(C11-12) - Body ground	10 kΩ or higher

Fig 5: Checking Harness And Connector (Brake Fluid Level Warning Switch -Combination Meter)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER)

Disconnect the skid control ECU connector and combination meter connector.

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

Standard:

RESISTANCE CONDITION (7 OF 8)

Tester Connection	Specified Condition
S1-44 (BRL)- (C11-9)	Below 1 Ω

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

Standard:

RESISTANCE CONDITION (8 OF 8)

Tester Connection	Specified Condition
S1-44 (BRL) - Body ground	10 kΩ or higher

Fig 6: Checking Harness And Connector (Skid Control ECU - Combination Meter)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

INSPECT COMBINATION METER ASSY
1. Check combination meter assy (see COMBINATION METER ).
NG: CHECK COMBINATION METER ASSY (SEE HOW TO PROCEED WITH TROUBLESHOOTING )

OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT )