DESCRIPTION
The main body ECU receives headlight dimmer switch information signals, and illuminates the front fog light.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (FRONT FOG LIGHT RELAY) |
(a) Using the Techstream, perform the Active Test (See page
).
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).
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
2. |
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
OK | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - FOG LIGHT ASSEMBLY) |
NG | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK FRONT POWER SEAT SWITCH LH
(a) Disconnect the b18 and b19 connectors from the front power seat switch LH.
(b) Measure the voltage and resistance according to the value(s) in the table
below.
Terminal No. (Symbol)
...
System Diagram
SYSTEM DIAGRAM
Communication Table
Transmitter
Receiver
Signal
Communication Line
Air conditioning amplifier assembly
ECM
A/C idle up request signal
CAN
...