Open in One Side of CAN Sub Bus Line (TO 12/2010): Procedure

1. Disconnect the connector with terminals CANH and CANL of the ECU.
   Fig 1: Identifying ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Select "CAN Bus Check" on the Techstream.

   HINT: 

   • This step should be repeated for each ECU (sensor) until only one (the disconnected ECU (sensor)) is missing from the CAN bus check.
   • It can then be determined that this ECU has an open circuit in one of its CANH or CANL wires.

   Standard

   A	B
   Only disconnected ECU is not displayed on the Techstream.	Several ECUs and sensors are not displayed on the Techstream.

B → RECONNECT CONNECTOR. REPEAT THIS INSPECTION FOR OTHER ECUS (SENSORS) UNTIL ONLY ONE IS NOT DISPLAYED 

A: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   ECUs (sensors)	Specified Condition
   ECM	108 to 132 Ω
   Skid control ECU	108 to 132 Ω
   Other ECUs (sensors)	54 to 69 Ω

   HINT: 

   • This is an example inspection.
   • Perform this inspection for the ECU that was not displayed in the previous inspection.

NG → REPAIR OR REPLACE ECU BUS LINE OR CONNECTOR 

OK → REPLACE ECU