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

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CAN BUS WIRE

Disconnect the connector with terminals CANH and CANL of the ECU.

Fig 1: Identifying Connector With Terminals CANH and CANL of the ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION

*a Example ECU

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

CHECK CAN BUS WIRE

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

Fig 2: Identifying Connector With Terminals CANH and CANL of the ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEXT IN ILLUSTRATION

*a	Example ECU

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