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 LHD) - Skid Control ECU Communication Stop Mode
DESCRIPTION
| Detection Item | Symptom | Trouble 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
|
- "ABS/VSC/TRAC" refers to the circuit that includes the skid control ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
- Result:
| Result | Proceed to |
| with VDIM System | A |
| without VDIM System | B |
| 2.CHECK CAN BUS LINE FOR OPEN (SKID CONTROL ECU BRANCH LINE) |
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 Connection | Condition | Specified Value |
| J77-8 (CANH) - J77-16 (CANL) | Engine switch off | 54 to 69 Ω |
| | REPAIR OR REPLACE SKID CONTROL ECU BRANCH LINE OR CONNECTOR (CAN-H, CAN-L) |
|
|
| 3.CHECK WIRE HARNESS (IG1, GND1) |
Disconnect the skid control ECU connectors (J78) and (J77).
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester Connection | Condition | Specified Value |
| J78-26 (GND1) - Body ground | Always | Below 1 Ω |
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
| Tester Connection | Condition | Specified Value |
| J77-1 (IG1) - Body ground | Engine switch on (IG) | 10 to 14 V |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 4.CHECK CAN BUS LINE FOR OPEN (SKID CONTROL ECU BRANCH LINE) |
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 Connection | Condition | Specified Value |
| A14-11 (CANH) - A14-25 (CANL) | Engine switch off | 54 to 69 Ω |
| | REPAIR OR REPLACE SKID CONTROL ECU BRANCH LINE OR CONNECTOR (CAN-H, CAN-L) |
|
|
| 5.CHECK WIRE HARNESS (IG1, GND1) |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester Connection | Condition | Specified Value |
| A14-32 (GND1) - Body ground | Always | Below 1 Ω |
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
| Tester Connection | Condition | Specified Value |
| A14-46 (IG1) - Body ground | Engine switch on (IG) | 10 to 14 V |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE SKID CONTROL ECU (BRAKE ACTUATOR) |
|
LEXUS IS250, IS220d / GSE20 ALE20
