DESCRIPTION
The main body ECU (multiplex network body ECU) receives the following switch information:
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
If the main body ECU (multiplex network body ECU) is replaced, refer to Registration
(See page ).*1
PROCEDURE
1. |
READ VALUE 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 / Data List.
(e) According to the display on the Techstream, read the Data List.
Main Body
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Dimmer SW |
Dimmer switch high position signal/ON or OFF |
ON: Dimmer switch in high or high flash (pass) position OFF: Dimmer switch in low position |
- |
Passing Light SW |
Dimmer switch high flash (pass) position signal/ON or OFF |
ON: Dimmer switch in high flash (pass) position OFF: Dimmer switch not in high flash (pass) position |
- |
Front Fog Light SW |
Front fog light switch signal/ON or OFF |
ON: Front fog light switch ON OFF: Front fog light switch off |
w/ Fog Light |
Auto Light SW |
Light control switch AUTO position signal/ON or OFF |
ON: Light control switch in AUTO position OFF: Light control switch not in AUTO position |
w/ Automatic High Beam System |
Head Light SW |
Light control switch head position signal/ON or OFF |
ON: Light control switch in head position OFF: Light control switch not in head position |
- |
Tail Light SW |
Light control switch tail position signal/ON or OFF |
ON: Light control switch in tail or head position OFF: Light control switch in neither tail nor head position |
- |
OK:
Normal conditions listed above are displayed.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY |
HINT:
Inspect the items that did not change as a result of monitoring the Data List.
(a) Remove the headlight dimmer switch assembly (See page
).
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance: Light Control Switch
OK: Headlight dimmer switch assembly is normal Text in Illustration
|
|
NG | ![]() |
REPLACE HEADLIGHT DIMMER SWITCH |
|
3. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - HEADLIGHT DIMMER SWITCH ASSEMBLY |
(a) Disconnect the C11 headlight dimmer switch assembly 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 |
---|---|---|
C11-9 (BFG) - M6-26 (FFOG) |
Always |
Below 1 Ω |
C11-14 (HU) - M6-24 (HU) |
Always |
Below 1 Ω |
C11-17 (HF) - M6-10 (HF) |
Always |
Below 1 Ω |
C11-18 (T) - M6-22 (TAIL) |
Always |
Below 1 Ω |
C11-19 (H) - M6-12 (HEAD) |
Always |
Below 1 Ω |
C11-20 (A) - M6-8 (A) |
Always |
Below 1 Ω |
C11-9 (BFG) - Body ground |
Always |
10 kΩ or higher |
C11-14 (HU) - Body ground |
Always |
10 kΩ or higher |
C11-17 (HF) - Body ground |
Always |
10 kΩ or higher |
C11-18 (T) - Body ground |
Always |
10 kΩ or higher |
C11-19 (H) - Body ground |
Always |
10 kΩ or higher |
C11-20 (A) - Body ground |
Always |
10 kΩ or higher |
C11-15 (EL) - Body ground |
Always |
Below 1 Ω |
C11-8 (LFG) - Body ground |
Always |
Below 1 Ω |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
System Diagram
SYSTEM DIAGRAM
Transmitting ECU (Transmitter)
Receiving ECU
Signals
Communication Method
ECM
Skid control ECU
Throttle position signal
Engine speed signal
Accelerator pedal position ...
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 ...
Removal
REMOVAL
PROCEDURE
1. REMOVE STEERING PAD
(See page )
2. REMOVE STEERING WHEEL ASSEMBLY
3. REMOVE LOWER STEERING COLUMN COVER
4. REMOVE UPPER STEERING COLUMN COVER
5. REMOVE SPIRAL CABLE SUB-ASSEMBLY WITH SENSOR
(a) Slide the slider and disconnect the airbag connector ...