Vehicle Stability Control System (W/O Vdim) - Tc And Cg Terminal Circuit

Lexus IS250 IS220d GSE20 ALE20 - BRAKE CONTROL

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

INSPECT DLC3

CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)

CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND)

CHECK ECM (TC of DLC3 INPUT)

VEHICLE STABILITY CONTROL SYSTEM (w/o VDIM) - TC and CG Terminal Circuit

DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the ECU to display the DTC by blinking the ABS warning light.


WIRING DIAGRAM

Vehicle Stability Control System (W/O Vdim) - Tc And Cg Terminal Circuit. 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
Go to step 5
NG
3.CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)
Vehicle Stability Control System (W/O Vdim) - Tc And Cg Terminal Circuit. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Turn the engine switch off.

Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

  • Standard resistance:
  • Tester ConnectionConditionSpecified Condition
    J21-13 (TC) - A6-3 (TC)AlwaysBelow 1 Ω
    J21-13 (TC) - Body groundAlways10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
4.CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND)
Vehicle Stability Control System (W/O Vdim) - Tc And Cg Terminal Circuit. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Measure the resistance according to the value(s) in the table below.

  • Standard resistance:
  • Tester ConnectionConditionSpecified Condition
    J21-4 (CG) - Body groundAlwaysBelow 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
5.CHECK ECM (TC of DLC3 INPUT)
Vehicle Stability Control System (W/O Vdim) - Tc And Cg Terminal Circuit. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

Reconnect the ECM connector.

Using SST, connect terminals TC and CG of the DLC3.

Turn the engine switch on (IG).

Check that the engine warning light is blinking.

  • Result:
  • ConditionProceed to
    Engine warning light is blinkingA
    Engine warning light is not blinkingB
  • 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 .
B
REPAIR OR REPLACE WIRE HARNESS OR ECM (TC of ECM CIRCUIT)
A
REPLACE BRAKE ACTUATOR ASSEMBLY