Onvehicle Inspection

1. INSPECT TURN SIGNAL FLASHER CIRCUIT

(a) Check the power source circuit and ground circuit.

(1) Remove the turn signal flasher relay from the main body ECU.

(2) Measure the voltage and check the results in accordance with the value(s) in the table below. Standard Voltage

Tester Connection

Condition

Specified Condition

1 - Body ground

Ignition switch OFF

0 V

1 - Body ground

Ignition switch ON

11 to 14 V

4 - Body ground

Always

11 to 14 V

(3) Measure the resistance and check the result in accordance with the value(s) in the table below. Standard Resistance

Tester Connection

Condition

Specified Condition

7 - Body ground

Always

Below 1 Q

(b) Check the output operation signal.

(1) Install the turn signal flasher relay onto the main body ECU.

Main Body ECU

(Front Side) Wire Harness View:

4A-27\r

4A-27\r

Toyota Yaris Turn Indicator Flasher

(Rear Side) Wire Harness View:

4S-17

4S-17

(2) Measure the voltage and check the results in accordance with the values in the table below.

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