Inspection Procedure

WARNING: This page is about a different car, the 2006 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)

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

Skid control ECU:

DATA LIST

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)
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)
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

TESTER CONNECTION AND SPECIFIED CONDITION

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)

Fig 2: Identifying Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY

OK: GO TO NEXT STEP

INSPECT BRAKE ACTUATOR

Disconnect the A37 and A38 actuator connectors.

Measure the resistance of the actuator.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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