Front Fog Light Circuit: Procedure
- PERFORM ACTIVE TEST USING TECHSTREAM (FRONT FOG LIGHT RELAY)
- Using the Techstream, perform the Active Test. Refer to DATA LIST / ACTIVE TEST
.MAIN BODY
Tester Display Test Part Control Range Diagnostic Note Front Fog Light Relay Front fog light relay ON/OFF - OK
Front fog light relay operates (front fog lights come on).
NG → See step 2
OK → See step 4
- Using the Techstream, perform the Active Test. Refer to DATA LIST / ACTIVE TEST
.
- 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)
- Measure the voltage according to the value(s) in the table below.
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL