Seat Belt Control ECU Communication Stop Mode: Procedure

1. Turn the engine switch off.
2. Disconnect the seat belt control ECU connector (Q38).
3. Measure the resistance according to the value(s) in the table below.
   Fig 1: Identifying Seat Belt Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Value
   Q58-1 (CANH) - Q58-2 (CANL)	Engine switch off	54 to 69 Ω

NG → REPAIR OR REPLACE SEAT BELT CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying Terminals Of Seat Belt Control ECU Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Value
   Q57-7 (PGND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Value
   Q58-8 (IG1) - Body ground	Engine switch on (IG)	10 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   3