DESCRIPTION
The main body ECU (multiplex network body ECU) controls the automatic high beam system based on signals received from the forward recognition camera.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. |
CHECK AUTOMATIC HIGH BEAM INDICATOR LIGHT |
(a) Check the operation of the automatic high beam indicator light.
OK:
Automatic high beam indicator light illuminates.
NG | ![]() |
GO TO STEP 4 |
|
2. |
READ VALUE USING TECHSTREAM |
(a) Using the Techstream, read the Data List.
Click here
(1) Shine a light on the automatic high beam sensor*. HINT: *: If troubleshooting is being performed in a bright area, such as outside on a sunny day, it will not be necessary to perform this step. Main Body
OK: The Data List value displays "Daytime". |
|
NG | ![]() |
REPLACE FORWARD RECOGNITION CAMERA |
|
3. |
READ VALUE USING TECHSTREAM |
(a) Using the Techstream, read the Data List.
Click here
(1) Cover the automatic high beam sensor with an opaque object, such as cardboard. NOTICE:
OK: The Data List value displays "Speed". |
|
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
NG | ![]() |
REPLACE FORWARD RECOGNITION CAMERA |
4. |
READ VALUE USING TECHSTREAM |
(a) Using the Techstream, read the Data List.
Click here
Tester Display |
Measurement Item / Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Auto High Beam Main Switch |
Auto high beam switch signal / OFF or ON |
OFF: Auto high beam switch off ON: Auto high beam switch on |
- |
OK:
Normal condition listed above is displayed.
NG | ![]() |
GO TO STEP 7 |
|
5. |
READ VALUE USING TECHSTREAM |
(a) Using the Techstream, read the Data List.
Click here
Tester Display |
Measurement Item / Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Auto H Beam STS0 |
Automatic high beam sensor state past 0 / Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err |
Condition can be displayed |
- |
OK:
The Data List value displays "Daytime" or "Speed".
NG | ![]() |
REPLACE FORWARD RECOGNITION CAMERA |
|
6. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Using the Techstream, perform the Active Test.
Click here
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Automatic High Beam Indicator |
Automatic high beam indicator light |
OFF or ON |
Operate with IG ON and the vehicle is stopped. |
OK:
Automatic high beam indicator light illuminates.
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPLACE COMBINATION METER ASSEMBLY |
7. |
INSPECT AUTO HIGH BEAM SWITCH |
(a) Remove the auto high beam switch.
Click here
(b) Inspect the auto high beam switch.
Click here
NG | ![]() |
REPLACE AUTO HIGH BEAM SWITCH |
|
8. |
CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] AND BODY GROUND) |
(a) Disconnect the A41 auto high beam switch connector.
(b) Disconnect the M6 main body ECU (multiplex network body ECU) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A41-4 (+B) - M6-17 (AHBI) |
Always |
Below 1 Ω |
A41-1 (E) - Body ground |
Always |
Below 1 Ω |
A41-4 (+B) or M6-17 (AHBI) - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
Customize Parameters
CUSTOMIZE PARAMETERS
1. CUSTOMIZE POWER DOOR LOCK CONTROL SYSTEM
HINT:
The following items can be customized.
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Be sure to make a note of the current settings before cus ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL HAZARD WARNING SIGNAL SWITCH ASSEMBLY (AIR CONDITIONING CONTROL ASSEMBLY)
(for Automatic Air Conditioning System)
(a) Connect the connectors.
(b) Engage the 8 clips to hazard warning signal switch assembly (air conditioning
control assembly).
2. INSTALL HAZ ...