Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Turn the ignition switch off before measuring the resistance of the CAN main wires and CAN branch wires.
After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

HINT:

Operating the ignition switch, any other switches, or any doors triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
Perform the following inspections for the ECUs (sensors) that are not displayed on the intelligent tester first. If a malfunction is still not able to be identified, perform the following inspections for all other ECUs (sensors) connected to the CAN communication system.
The basic inspection procedures that can be used for all related ECUs in common are shown below. "ECU A" represents the following: ECM, steering sensor, yaw rate sensor, skid control ECU, combination meter ECU.

CHECK FOR AN OPEN IN ONE SIDE OF THE CAN SUB BUS LINE

Disconnect the connector with terminals CANH and CANL from ECU A.

Select "Check the ECU connected to CAN BUS "on the intelligent tester.

Result

FOR AN OPEN IN ONE SIDE OF THE CAN SUB BUS LINE

Result	Proceed to
ECUs only are not displayed on the intelligent tester.	A
Several ECUs and sensors are not displayed on the intelligent tester.	B

Fig 1: Identifying Connector Terminals CANH And CANL

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

B: CONNECT THE ECU A CONNECTOR TO THE ECU (SENSOR) AND INSPECT OTHER ECUS (SENSORS) TO MEET "RESULT A"

A: Go to next step

CHECK FOR AN OPEN IN ONE SIDE OF THE CAN SUB BUS LINE

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

Standard resistance

FOR AN OPEN IN ONE SIDE OF THE CAN SUB BUS LINE

Component	Condition	Specified Value
ECM	Disconnect the negative battery cable	108 to 132 Ω
Combination Meter	Disconnect the negative battery cable	108 to 132 Ω
Others	Disconnect the negative battery cable	54 to 69 Ω

Fig 2: Identifying Connector Terminals CANH And CANL

NG: REPAIR OR REPLACE ECU A SUB BUS LINE OR CONNECTOR

OK: REPLACE ECU A