Inspection Procedure

NOTICE:

• 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 (AIR CONDITIONING AMPLIFIER BRANCH WIRE)

Wire Harness Side:

Air Conditioning Amplifier Connector

TX+

(a) Turn the ignition switch OFF.

(b) Disconnect the E8 air conditioning amplifier connector.

(c) Measure the resistance. Standard resistance

Tester Connection

Condition

Specified Condition

E8-2 (TX+) - E8-3 (TX-)

Ignition switch OFF

54 to 69 Q

NG REPAIR OR REPLACE CAN BRANCH WIRE

-^^ CONNECTED TO AIR CONDITIONING

AMPLIFIER (CAN-H, CAN-L)

CHECK HARNESS AND CONNECTOR (IG+, GND)

Wire Harness Side:

Air Conditioning Amplifier Connector

Can Can Toyota Yaris

(a) Disconnect the E8 air conditioning amplifier connector.

(b) Measure the resistance. Standard resistance

REPAIR OR REPLACE HARNESS OR CONNECTOR

Tester Connection

Condition

Specified Condition

E8-12 (GND) - Body ground

Always

Below 1 Q

(c) Measure the voltage. Standard voltage

Tester Connection

Condition

Specified Condition

E8-8 (IG+) - Body ground

Ignition switch ON

11 to 14 V

REPLACE AIR CONDITIONING AMPLIFIER

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