2Ad-Fhv Can Communication System (For Rhd) - Skid Control Ecu Communication Stop Mode

Lexus IS250 IS220d GSE20 ALE20 - CAN COMMUNICATION

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CONFIRM MODEL

CHECK CAN BUS LINE FOR OPEN (SKID CONTROL ECU BRANCH LINE)

CHECK WIRE HARNESS (IG1, GND1)

CHECK CAN BUS LINE FOR OPEN (SKID CONTROL ECU BRANCH LINE)

CHECK WIRE HARNESS (IG1, GND1)

2AD-FHV CAN COMMUNICATION SYSTEM (for RHD) - Skid Control ECU Communication Stop Mode

DESCRIPTION

Detection ItemSymptomTrouble Area
Skid Control ECU Communication Stop Mode
"ABS/VSC/TRAC" is not displayed on the "BUS CHECK" screen of the intelligent tester
Applies to "Skid Control ECU Communication Stop Mode" in the "DTC COMBINATION TABLE"
Power source circuit of the skid control ECU
Skid control ECU branch line or connector
Skid control ECU
  • HINT:
  • "ABS/VSC/TRAC" refers to the circuit that includes the skid control ECU.

WIRING DIAGRAM

2Ad-Fhv Can Communication System (For Rhd) - Skid Control Ecu Communication Stop Mode. CAN COMMUNICATION. Lexus IS250 IS220d GSE20 ALE20

2Ad-Fhv Can Communication System (For Rhd) - Skid Control Ecu Communication Stop Mode. CAN COMMUNICATION. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.CONFIRM MODEL
  • Result:
  • ResultProceed to
    with VDIM SystemA
    without VDIM SystemB
B
Go to step 4
A
2.CHECK CAN BUS LINE FOR OPEN (SKID CONTROL ECU BRANCH LINE)
2Ad-Fhv Can Communication System (For Rhd) - Skid Control Ecu Communication Stop Mode. CAN COMMUNICATION. Lexus IS250 IS220d GSE20 ALE20

Turn the engine switch off.

Disconnect the skid control ECU connector (J77).

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

  • Standard resistance:
  • Tester ConnectionConditionSpecified Value
    J77-8 (CANH) - J77-16 (CANL)Engine switch off54 to 69 Ω
NG
REPAIR OR REPLACE SKID CONTROL ECU BRANCH LINE OR CONNECTOR (CAN-H, CAN-L)
OK
3.CHECK WIRE HARNESS (IG1, GND1)
2Ad-Fhv Can Communication System (For Rhd) - Skid Control Ecu Communication Stop Mode. CAN COMMUNICATION. Lexus IS250 IS220d GSE20 ALE20

Disconnect the skid control ECU connectors (J78) and (J77).

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

  • Standard resistance:
  • Tester ConnectionConditionSpecified Value
    J78-26 (GND1) - Body ground AlwaysBelow 1 Ω

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

  • Standard voltage:
  • Tester ConnectionConditionSpecified Value
    J77-1 (IG1) - Body groundEngine switch on (IG)10 to 14 V
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE SKID CONTROL ECU
4.CHECK CAN BUS LINE FOR OPEN (SKID CONTROL ECU BRANCH LINE)
2Ad-Fhv Can Communication System (For Rhd) - Skid Control Ecu Communication Stop Mode. CAN COMMUNICATION. Lexus IS250 IS220d GSE20 ALE20

Turn the engine switch off.

Disconnect the skid control ECU connector (A14).

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

  • Standard resistance:
  • Tester ConnectionConditionSpecified Value
    A14-11 (CANH) - A14-25 (CANL)Engine switch off54 to 69 Ω
NG
REPAIR OR REPLACE SKID CONTROL ECU BRANCH LINE OR CONNECTOR (CAN-H, CAN-L)
OK
5.CHECK WIRE HARNESS (IG1, GND1)
2Ad-Fhv Can Communication System (For Rhd) - Skid Control Ecu Communication Stop Mode. CAN COMMUNICATION. Lexus IS250 IS220d GSE20 ALE20

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

  • Standard resistance:
  • Tester ConnectionConditionSpecified Value
    A14-32 (GND1) - Body ground AlwaysBelow 1 Ω

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

  • Standard voltage:
  • Tester ConnectionConditionSpecified Value
    A14-46 (IG1) - Body groundEngine switch on (IG)10 to 14 V
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR)