Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

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 (VSC MOTOR RELAY OPERATION)
1. Connect the hand-held tester to the DLC3.
2. Start the engine.
3. Select the ACTIVE TEST mode on the hand-held tester.
4. Check the operation sound of the VSC motor individually when operating it with the hand-held tester.
Fig 1: VSC Motor Relay Operation Specifications Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard:

The operation sound of the ABS motor should be heard.

NOTE: When replacing the Brake Actuator assy, perform zero point calibration (see PRE-CHECK ).

NG: Go to step 2

OK: REPLACE BRAKE ACTUATOR ASSY
INSPECT FUSE (ABS FUSE)
1. Remove the ABS fuse from the engine room R/B.
  
  Fig 2: Removing ABS Fuse
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in Fig 3 .
  Standard
  
  Fig 3: Removing ABS Fuse From Engine Room R/B
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: CHECK FOR SHORT IN ALL HARNESS AND CONNECTOR CONNECTED TO FUSE AND REPLACE FUSE

OK: Go to next step.
CHECK TERMINAL VOLTAGE (VSC CUT RELAY 5 TERMINAL OF ABS R/B)
1. Remove the VSC cut relay from the ABS R/B.
  
  Fig 4: Removing VSC Cut Relay
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value(s) in Fig 5 .
  Standard
  
  Fig 5: Measuring Voltage Between Terminal 5 & Body Ground
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step.
INSPECT VSC CUT RELAY
1. Measure the resistance according to the value(s) in Fig 6 .
  Standard
  
  Fig 6: Measuring VSC Cut Relay Specifications Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery voltage between terminals 1 and 2.
3. Measure the resistance according to the value(s) in Fig 7 .
  Standard
  
  Fig 7: Measuring Resistance Between Terminals 3 & 5
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 8: Inspecting VSC Cut Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE VSC CUT RELAY

OK: Go to next step.
INSPECT VSC MOTOR RELAY
1. Measure the resistance according to the value(s) in Fig 9 .
  Standard
  
  Fig 9: Measuring Resistance Between Terminals 1 & 2 And 3 & 5
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery voltage between terminals 1 and 2.
3. Measure the resistance according to the value(s) in Fig 10 .
  Standard
  
  Fig 10: Measuring Resistance Between Terminals 3 & 5
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 11: Inspecting VSC Motor Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE VSC MOTOR RELAY

OK: Go to next step.
CHECK HARNESS AND CONNECTOR (VSC MOTOR RELAY - SKID CONTROL ECU ASSY)
1. Disconnect the skid control ECU connector.
2. Measure the resistance according to the value(s) in Fig 12 .
  Standard
  
  Fig 12: Measuring Resistance Between BM & ABS R/B
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in Fig 13 .
  Standard
  
  Fig 13: Measuring Resistance Between BM & Body Ground
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 14: Identifying Skid Control ECU & ABS R/B
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.
RECONFIRM DTC
1. Clear the DTCs. (see PRE-CHECK 52x)
2. Turn the ignition switch to the ON position.
3. Are the same DTCs recorded? (see PRE-CHECK )
NOTE: When replacing the Brake Actuator assy, perform zero point calibration (see PRE-CHECK ).

NO: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE PROBLEM SYMPTOMS TABLE )

YES: REPLACE BRAKE ACTUATOR ASSY (SEE REPLACEMENT )