DESCRIPTION
The main body ECU (multiplex network body ECU) receives headlight dimmer switch information signals, and illuminates the high beam headlight.
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 (DAYTIME RUNNING LIGHT) |
(a) Using the Techstream, perform the Active Test (See page
).
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Daytime Running Light |
Running light relay |
ON/OFF |
- |
Head Light Hi |
Running light relay |
ON/OFF |
- |
OK:
Running light relay operates (high beam headlights illuminate).
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
CHECK HARNESS AND CONNECTOR (BATTERY - RUNNING LIGHT RELAY) |
(a) Remove the running light relay from the engine room relay block, junction block.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Running light relay terminal 6 (+B) - Body ground |
Always |
11 to 14 V |
*a |
Front view of wire harness connector (to Running Light Relay) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
(a) Remove the running light relay from the engine room relay block, junction block.
(b) Disconnect the 2C and 2D driver side junction block assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Running light relay terminal 4 (H) - 2D-24 |
Always |
Below 1 Ω |
Running light relay terminal 2 (DRLS) - 2C-37 |
Always |
Below 1 Ω |
Running light relay terminal 3 (E) - Body ground |
Always |
Below 1 Ω |
Standard Resistance (Check for Short):
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Running light relay terminal 4 (H) or 2D-24 - Body ground |
Always |
10 kΩ or higher |
Running light relay terminal 2 (DRLS) or 2C-37 - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY |
(a) Remove the driver side junction block assembly (See page
).
(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
2D-24 - A-22 (DIM) |
Always |
Below 1 Ω |
2C-37 - A-25 (DRL) |
Always |
Below 1 Ω |
*a |
Component without harness connected (Driver Side Junction Block Assembly) |
- |
- |
NG | ![]() |
REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY |
|
5. |
REPLACE RUNNING LIGHT RELAY |
(a) Replace the running light relay.
(b) Check that the daytime running lights operate normally (See page
).
OK:
The daytime running lights operate normally.
OK | ![]() |
END (RUNNING LIGHT RELAY WAS DEFECTIVE) |
NG | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE
1. REMOVE ROCKER PANEL MOULDING (w/ Intuitive Parking Assist System)
(See page )
2. REMOVE ...
Passenger Airbag ON/OFF Indicator Circuit Malfunction (B1660/43)
DESCRIPTION
The passenger airbag ON/OFF indicator circuit consists of the airbag sensor assembly
and passenger airbag ON/OFF indicator.
The passenger airbag ON/OFF indicator indicates the operation condition of the
instrument panel passenger airbag, lowe ...