DESCRIPTION
When the main body ECU receives a high beam turn on signal, the main body ECU activates the bi-function by controlling the BI-XENON relay. The bi-function increases the upper illumination area of the discharge bulb (low beam) by moving a shade using a solenoid built into the headlight unit.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. |
CHECK OPERATION (LOW BEAM HEADLIGHTS) |
(a) Check the operation of the low beam headlights.
OK:
Low beam headlights operate normally.
NG | ![]() |
GO TO PROBLEM SYMPTOMS TABLE |
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(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) Check that the high beam headlights illuminate.
Main Body
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Head Light Hi |
High beam headlight relay |
ON/OFF |
- |
OK:
High beam headlights illuminate.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
3. |
INSPECT BI-XENON RELAY (BI-XENON) |
(a) Remove the BI-XENON relay from the power distributor (engine room junction block assembly). |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
3 - 5 |
Battery voltage applied to terminals 1 and 2 |
Below 1 Ω |
3 - 5 |
Battery voltage not applied between terminals |
10 kΩ or higher |
NG | ![]() |
REPLACE BI-XENON RELAY |
|
4. |
CHECK HARNESS AND CONNECTOR (BATTERY - BI-XENON RELAY) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Relay terminal 2 - Body ground |
Always |
11 to 14 V |
Relay terminal 5 - Body ground |
Always |
11 to 14 V |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK HARNESS AND CONNECTOR (BI-XENON RELAY - HEADLIGHT ASSEMBLY) |
(a) Disconnect the A53 headlight assembly LH connector.
(b) Disconnect the A52 headlight assembly RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Relay terminal 3 - A53-4 |
Always |
Below 1 Ω |
Relay terminal 3 - A52-4 |
Always |
Below 1 Ω |
Relay terminal 3 - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. |
CHECK HARNESS AND CONNECTOR (BI-XENON RELAY - DRIVER SIDE JUNCTION BLOCK) |
(a) Disconnect the 2C main body ECU (driver side junction block assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Relay terminal 1 - 2C-23 |
Always |
Below 1 Ω |
2C-23 - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
ECM
Combination Meter ECU
CRUISE main indicator operation signal
SET indicator operation sig ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the engine immobiliser system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Installation
INSTALLATION
CAUTION / NOTICE / HINT
HINT:
Perform "Inspection After Repair" after replacing the camshaft, No. 2 camshaft,
camshaft timing gear assembly, camshaft timing exhaust gear assembly or cylinder
head sub-assembly (See page ).
PROCED ...