Front Fog Light Circuit [08/2014 - ]: Procedure

PERFORM ACTIVE TEST USING TECHSTREAM (FRONT FOG LIGHT RELAY)

Using the Techstream, perform the Active Test. Refer to DATA LIST / ACTIVE TEST [08/2014 - ] .

MAIN BODY

Tester Display	Test Part	Control Range	Diagnostic Note
Front Fog Light Relay	Front fog light relay	ON/OFF	-

Front fog light relay operates (front fog lights come on).

NG → See step 2

OK → See step 4

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
2D-9 - Body ground	Headlight dimmer switch in tail and front fog light switch on	11 to 14 V

TEXT IN ILLUSTRATION

*a	Component with harness connected (Driver Side Junction Block Assembly)

NG → See step 3

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - FOG LIGHT ASSEMBLY)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [08/2014 - ]
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [08/2014 - ]