DESCRIPTION
The main body ECU (multiplex network body ECU) controls the front fog lights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (FRONT FOG LIGHT RELAY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Main Body
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Front Fog Light Relay |
Front Fog Light |
ON/OFF |
- |
OK:
Front fog lights illuminate.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
INSPECT FOG FR RELAY |
(a) Remove the FOG FR relay from the engine room relay block. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
3 - 5 |
Battery voltage not applied to terminals 1 and 2 |
10 kΩ or higher |
3 - 5 |
Battery voltage applied to terminals 1 and 2 |
Below 1 Ω |
NG | ![]() |
REPLACE FOG FR RELAY |
|
3. |
CHECK HARNESS AND CONNECTOR (BATTERY - FOG FR RELAY) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Relay terminal 1 - Body ground |
Always |
11 to 14 V |
Relay terminal 3 - Body ground |
Always |
11 to 14 V |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK HARNESS AND CONNECTOR (FOG FR RELAY - DRIVER SIDE JUNCTION BLOCK) |
(a) Disconnect the 1F driver side junction block connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Relay terminal 2 - 1F-27 |
Always |
Below 1 Ω |
1F-27 - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
INSPECT DRIVER SIDE JUNCTION BLOCK |
(a) Remove the driver side junction block. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1F-27 - MB-7 (FFOG) |
Always |
Below 1 Ω |
1F-27 - Body ground |
Always |
10 kΩ or higher |
*a |
Component without harness connected (Driver Side Junction Block) |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPLACE DRIVER SIDE JUNCTION BLOCK |
Freeze Frame Data
FREEZE FRAME DATA
CHECK FREEZE FRAME DATA
HINT:
The ECU records vehicle and driving condition information as freeze frame data
the moment a DTC is stored.
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: P ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT TRANSMISSION WIRE
(a) Measure the resistance according to the value(s) in the table below.
Text in Illustration
*a
Component without harness connected
(Transmission Wire)
Standard Resistance: ...
Customizable features
Your vehicle includes a variety of electronic features that can be personalized
to your preferences. Programming these preferences requires specialized equipment
and may be performed by an authorized Toyota dealership.
Some function settings are changed simultaneously with other functions being ...