DESCRIPTION
The main body ECU LH receives rear fog light switch information from the combination switch, and turns on the rear fog lights.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
PERFORM ACTIVE TEST USING INTELLIGENT TESTER
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester on.
Enter the following menus: Body / Body No. 3/ Active Test.
Check the operation.
Tester Display | Test Part | Control Range | Diagnostic Note |
---|---|---|---|
Rear Fog Light | Rear fog lights | ON/OFF | - |
OK |
---|
Rear fog lights illuminate. |
NG |
INSPECT FUSE (RR FOG) Click here |
OK |
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here
INSPECT FUSE (RR FOG)
Remove the RR FOG fuse from the No. 1 junction block.
Measure the resistance of the fuse.
Standard Resistance |
---|
Below 1 Ω |
NG |
REPLACE FUSE |
OK |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - BATTERY)
Disconnect the LM junction block connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
OK |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - BODY GROUND)
Connect the LM junction block connector.
Disconnect the LJ junction block connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH) |
OK |
REPAIR OR REPLACE HARNESS OR CONNECTOR