Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Start the inspection from step 1, in case of using the hand-held tester and start from step 3, in case of not using hand-held tester.

Check ABS motor 1 and ABS motor 2 relay operation.
PREPARATION:
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON and push the hand-held tester main switch ON.
3. Select the ACTIVE TEST mode on the hand-held tester.
  CHECK:
  
  Check the operation sound of the ABS motor relays individually when operating it with the hand-held tester.
  
  OK:
  
  The operation sound of the ABS motor 1 relay and ABS motor 2 relay should be heard.
1. NG: Go to step 3 .
2. OK: Go to next step.
Check for short circuit (to B+) in harness and connector between MT of hydraulic brake booster and skid control ECU (See HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION ).
1. NG: Repair or replace harness or connector.
2. OK: Check and replace skid control ECU.
Check voltage between terminal 1 of engine room J/B (for ABS motor 1 relay and ABS motor 2 relay) and body ground.
PREPARATION:

Remove the ABS motor 1 relay and ABS motor 2 relay from the engine room J/B.

CHECK:

Measure voltage between terminal 1 of the engine room J/B (for ABS motor 1 relay and ABS motor 2 relay) and body ground.

OK:

Voltage: 10 to 14V

Fig 1: Measuring Voltage Between Terminal 1 Of Engine Room J/B & Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Check and repair harness or connector.
2. OK: Go to next step.

Check ABS motor 1 relay and ABS motor 2 relay.

PREPARATION:

Remove the ABS motor 1 relay and ABS motor 2 relay from the engine room J/B.

CHECK:

Check continuity between the motor relay terminals listed in TERMINALS NO AND CONTINUITY .

OK:

TERMINALS NO AND CONTINUITY

Terminals 3 and 4

Continuity (Reference value ⁽¹⁾)

Terminals 1 and 2

Open

⁽¹⁾	ABS motor 1 relay: 54 Ω, ABS motor 2 relay: 62 Ω

CHECK:

Apply battery positive voltage between terminals 3 and 4.
Check continuity between terminals.
OK:
TERMINALS NO AND CONTINUITY

Terminals 1 and 2 Continuity

Fig 2: Checking Continuity Between Motor Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Replace ABS motor 1 relay or ABS motor 2 relay.
OK: Go to next step.

Check continuity between terminal MT of the ABS & BA & TRAC & VSC ECU and terminals BM1 and BM2, respectively.
PREPARATION:

Disconnect the 2 connectors from the hydraulic brake booster.

CHECK:
1. Check continuity between terminal BM1 of the ABS motor 2 relay and terminal MT of the ABS & BA & TRAC & VSC ECU.
2. Check continuity between terminal BM2 of the ABS motor 1 relay and terminal MT of the ABS & BA & TRAC & VSC ECU.
  OK:
  
  Continuity
  
  HINT:
  
  There is resistance of 33 +/- 3 Ω between terminal BM1 or BM2 and MT of the hydraulic brake booster.
  
  Fig 3: Checking Continuity Between Terminals Of ABS Motor 1 Relay & Terminal Of ABS & BA & TRAC & VSC ECU
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Repair or replace harness, connector or hydraulic brake booster.
2. OK: Go to next step.
Check for open and short circuit in harness and connector between ABS motor1 and ABS motor2 relay and ABS & BA & TRAC & VSC ECU (See HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION ).
1. NG: Repair or replace harness or connector.
2. OK: Check and replace ABS & BA & TRAC & VSC ECU.