Steering Control ECU Communication Stop Mode: Wiring Diagram
- CHECK CAN BUS LINE FOR DISCONNECTION (STEERING CONTROL ECU SUB BUS LINE)
- Turn the engine switch off.
- Disconnect the steering control ECU (K70).
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED VALUE CHARTTester Connection Condition Specified Value K70-9 (CANH) - K70-20 (CANL) Engine switch off 54 to 69 Ω Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG : REPAIR OR REPLACE STEERING CONTROL ECU SUB BUS LINE OR CONNECTOR (CANH, CAN-L)
OK : GO TO NEXT STEP
- CHECK WIRE HARNESS (IG, PGND)
- Reconnect the steering control ECU connector (K70).
- Disconnect the steering control ECU connector (A40).
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED VALUE CHARTTester Connection Condition Specified Value A40-7 (PGND) - Body ground Always Below 1 Ω - Measure the voltage according to the value(s) in the table below.
Standard voltage
TESTER CONNECTION SPECIFIED VALUE CHARTTester Connection Condition Specified Value A40-3 (IG) - Body ground Engine switch on (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR
OK : GO TO NEXT STEP
REPLACE STEERING CONTROL ECU