Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

When using the intelligent tester, start from *1. When not using the intelligent tester, start from *2.

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (ABS MOTOR RELAY)*1

Select the ACTIVE TEST, generate a control command, and then check that the ABS motor relay operates.

Skid control ECU:

ACTIVE TEST REFERENCE

Item	Vehicle Condition / Test Details	Diagnostics Note
ABS MOT RELAY	Turn ABS motor relay ON / OFF	Operation sound of motor can be heard

OK: Operation sound of ABS motor is heard.

NG: GO TO step 3

OK: GO TO Next Step

CHECK WIRE HARNESS (SKID CONTROL ECU ASSEMBLY - BRAKE ACTUATOR)*2
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE SKID CONTROL ECU ASSEMBLY
CHECK ENGINE ROOM RELAY BLOCK (ABS MTR 1 RELAY AND ABS MTR 2 RELAY)*2
1. Remove the ABS MTR 1 relay and ABS MTR 2 relay from the engine room relay block.
2. Measure the voltage between terminal 1 of the engine room relay block (for ABS MTR 1 relay and ABS MTR 2 relay) and body ground.
OK:

Standard voltage:

10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 1: Identifying ABS MTR 1 Relay & ABS MTR 2 Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO Next Step

INSPECT RELAY (Marking: ABS MTR 1, ABS MTR 2)

Remove the ABS MTR 1 relay and ABS MTR 2 relay from the engine room relay block.
Measure the resistance of the relay.

Standard resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Specified Condition
1 - 2	10 kΩ or higher
1 - 2	Below 1 Ω (When battery voltage is applied to terminals 3 and 4)

NG: REPLACE RELAY

Fig 2: Identifying Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO Next Step

INSPECT BRAKE ACTUATOR

Disconnect the A37 and A38 actuator connectors.
Measure the resistance of the actuator.

Standard resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Specified Condition
A37-2 (BM1) - A38-7 (MTT)	30 to 36 Ω
A38-3 (BM2) - A38-7 (MTT)	30 to 36 Ω

NG: REPLACE BRAKE ACTUATOR

Fig 3: Inspecting Brake Actuator

OK: GO TO Next Step

CHECK WIRE HARNESS (BRAKE ACTUATOR - SKID CONTROL ECU ASSEMBLY AND ABS MTR 1 AND ABS MTR 2 RELAY)
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE SKID CONTROL ECU ASSEMBLY