Inspection Procedure

NOTICE:

• Turn the ignition switch off before measuring the resistance of the CAN main wire 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 triggers related ECU and sensor communication on the CAN, which would cause resistance reading variations.

CHECK CAN BUS LINE FOR DISCONNECTION (ECU MAIN BUS LINE)

ECM Connector (Front View):

1=

1—

CANH

CANL

(a) Reconnect the CAN main bus line connector (A40) to the No. 2 CAN J/C (front side of the vehicle).

(b) Disconnect the ECM connector.

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

Standard resistance: 2AZ-FE

Tester Connection

Condition

Specified Value

A24-38 (CANH) - A24-46 (CANL)

Ignition switch off

108 to 132 Q

2GR-FE

Tester Connection

Condition

Specified Value

A55-38 (CANH) - A55-46 (CANL)

Ignition switch off

108 to 132 Q

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR

CHECK ECM POWER SOURCE CIRCUIT

(a) Check the ECM power source circuit (2AZ-FE: See page ES-380 or 2GR-FE: See page ES-432)

REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT

REPLACE ECM

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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