Taillight Relay Circuit [09/2013 - ]: Procedure

PERFORM ACTIVE TEST USING TECHSTREAM (TAILLIGHT RELAY)

Using the Techstream, perform the Active Test. Refer to DATA LIST / ACTIVE TEST [09/2013 - ] .

MAIN BODY

Tester Display	Test Part	Control Range	Diagnostic Note
Taillight Relay	Taillight relay	ON/OFF	-

Taillights come on.

NG → See step 2

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY)

Disconnect the main body ECU connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Voltage

Tester Connection	Condition	Specified Condition
IG-1 - Body ground	Always	11 to 14 V

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Main Body ECU [Instrument Panel Junction Block Assembly])

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 3

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [09/2013 - ]