Inspection Procedure

NOTE:

Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
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 switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

CHECK CAN BUS LINE FOR DISCONNECTION (YAW RATE SENSOR BRANCH WIRE)

Measure the resistance according to the value in the table below.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
F34-3 (CANH) - F34-2 (CANL)	Ignition Switch off	54 to 69 Ω

NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO YAW RATE SENSOR (CAN-H, CAN-L)

Fig 1: Identifying Yaw Rate Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (IGSW, E1)

Measure the resistance according to the value in the table below.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
F34-1 (GND) - Body ground	Always	Below 1Ω

Measure the voltage according to the value in the table below.

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
F34-4 (IG) - Body ground	Ignition switch on	11 to 14V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying Yaw Rate Sensor Connector Terminals

OK : REPLACE YAW RATE SENSOR (See REMOVAL )