Lexus IS250 IS220d GSE20 ALE20 - BRAKE CONTROL

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

CHECK MULTIPLEX COMMUNICATION SYSTEM

CHECK ABS WARNING LIGHT

INSPECT COMBINATION METER ASSEMBLY

VEHICLE STABILITY CONTROL SYSTEM (w/o VDIM) - ABS Warning Light does not Come ON

DESCRIPTION

The skid control ECU is connected to the combination meter via CAN and multiplex communications.


WIRING DIAGRAM

Vehicle Stability Control System (W/O Vdim) - Abs Warning Light Does Not Come On. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

  • NOTICE:
  • When replacing the brake actuator assembly, perform zero point calibration .
1.CHECK CAN COMMUNICATION SYSTEM

Check if the CAN communication system DTC is output ( for LHD, or for RHD).

  • Result:
  • ConditionProceed to
    DTC is not outputA
    DTC is outputB
B
INSPECT CAN COMMUNICATION SYSTEM
A
2.CHECK MULTIPLEX COMMUNICATION SYSTEM

Check if the multiplex communication system DTC is output .

  • Result:
  • ConditionProceed to
    DTC is not outputA
    DTC is outputB
B
INSPECT MULTIPLEX COMMUNICATION SYSTEM
A
3.CHECK ABS WARNING LIGHT

Disconnect the skid control ECU connector.

Turn the engine switch on (IG).

Check that the ABS warning light comes on.

  • OK:
  • ABS warning light comes on.
  • HINT:
  • If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part .
OK
REPLACE BRAKE ACTUATOR ASSEMBLY
NG
4.INSPECT COMBINATION METER ASSEMBLY

Turn the engine switch off.

Reconnect the skid control ECU connector.

Perform Active Test of the combination meter (meter CPU) using the intelligent tester .

  • OK:
  • The ABS warning light turns on or off in accordance with the intelligent tester.
  • HINT:
  • If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step .
NG
REPLACE COMBINATION METER ASSEMBLY
OK
REPLACE BRAKE ACTUATOR ASSEMBLY