TERMINALS OF ECU
System information
| Combination Meter Assembly |
*2: w/ Navigation System
| Symbols (Terminal No.) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
| POWER GND (C8-1) - Body ground |
L-B - Body ground |
Ground (Power ground) |
Always |
Below 1 V |
| ILL- (C8-2) - Body ground |
L - Body ground |
Illumination signal |
Turn the ignition switch to the ON position, combination switch TAIL |
Below 1 V → 10 to 16 V |
| CHECK ENGINE (C8-4) - Body ground |
BR - Body ground |
Check engine signal |
Turn the ignition switch to the ON position, check engine warning light OFF → ON |
10 to 16 V → Below 1.5 V |
| MPX+ (C8-5) - Body ground |
Y - Body ground |
Communication line |
- |
- |
| SPEED SIGNAL (4P) (C8-6) - Body ground |
LG - Body ground |
Speed signal (Output) |
Turn the ignition switch to the ON position, turn the wheel slowly |
Pulse generation (See waveform 1) |
| IG2 (C8-8) - Body ground |
GR - Body ground |
Battery |
Ignition switch OFF → ON |
Below 1 V → 10 to 16 V |
| TURN R (C8-13) - Body ground |
P - Body ground |
Turn signal flasher |
Turn the ignition switch to the ON position, turn signal RH indicator light OFF → ON |
Below 1 V → 10 to 16 V |
| TURN L (C8-14) - Body ground |
B - Body ground |
Turn signal flasher |
Turn the ignition switch to the ON position, turn signal LH indicator light OFF → ON |
Below 1 V → 10 to 16 V |
| ECU +B (C8-15) - Body ground |
SB - Body ground |
Battery |
Always |
10 to 16 V |
| DOME +B (C8-16) - Body ground |
O - Body ground |
Battery |
Always |
10 to 16 V |
| SIGNAL GND (C9-1) - Body ground |
W-B - Body ground |
Ground (Signal ground) |
Always |
Below 1 V |
| FE (C9-2) - Body ground |
P - Body ground |
Ground (Fuel ground) |
Always |
Below 1 V |
| MPX- (C9-4) - Body ground |
B - Body ground |
Communication line |
- |
- |
| POWER METER (C9-8) - Body ground |
W - Body ground |
Power meter signal |
Turn the Ignition switch to the off → ON position |
Pulse generation (See waveform 2) |
| MULTI MODE SW (C9-9) - Body ground |
Y - Body ground |
Multi mode switch signal |
Turn the ignition switch to the ON position, multi mode switch OFF → ON |
4 to 6V → Below 1 V |
| H-LP LEVEL (C9-10) (*1) - Body ground |
B - Body ground |
Headlight beam level control signal |
Turn the ignition switch to the ON position, leveling indicator light OFF → ON |
10 to 16 V → Below 1 V |
| RE (C9-13) - Body ground |
W - Body ground |
Ground (Rheostat ground) |
Always |
Below 1 V |
| RV (C9-14) - Body ground |
O - Body ground |
Light control rheostat signal |
Turn the ignition switch to the ON position, rheostat knob position MIN → MAX |
Below 1 V → 4 to 6 V |
| RL (C9-15) - Body ground |
B - Body ground |
Light control rheostat signal |
Turn the ignition switch to the ON position |
4 to 6 V |
| TCAN SW (C9-16) - Body ground |
Y - Body ground |
Tail cancel switch signal |
Turn the ignition switch to the ON position, tail cancel switch OFF → ON |
4 to 6 V → Below 1 V |
| RSET (C9-17) - Body ground |
L - Body ground |
ODO/TRIP switch signal |
Turn the ignition switch to the ON position, ODO/TRIP switch OFF → ON |
4 to 6 V → Below 1 V |
| SPEED SIGNAL (C9-18) - Body ground |
BR - Body ground |
Speed signal (Input) |
Turn the ignition switch to the ON position, turn the wheel slowly |
Pulse generation (See waveform 2) |
| FUEL SENDER (C9-19) - Body ground |
V - Body ground |
Fuel level signal |
Turn the ignition switch to the ON position, fuel level MIN → MAX |
4 to 9 V → Below 2V |
| P-SEAT (C9-20) - Body ground |
GR - Body ground |
Passenger seat condition signal |
Sits on the passenger seat and turn the ignition switch to the off → ON position |
10 to 16 V → Below 1 V |
| OIL LEVEL (C9-21) - Body ground |
BR - Body ground |
Engine oil level signal |
Turn the ignition switch to the ON position, low engine oil level warning comes on. |
Below 1 V → 10 to 16 V |
| P SEAT BELT (C9-22) (*2) - Body ground |
P - Body ground |
Passenger side seat belt signal |
Turn the ignition switch to the ON position, passenger seat belt warning light OFF → blinks |
10 to 16 V → Below 1 V |
| WASHER LEVEL (C9-24) - Body ground |
LG - Body ground |
Washer level indicator light signal |
Turn the ignition switch to the ON position, washer level indicator light OFF → ON |
10 to 16 V → Below 1 V |
Waveform 1 (Reference): Using an oscilloscope:
OK Item
Condition
Tool setting
5 V/DIV., 20 ms/DIV.
Vehicle condition
Driving at approx. 20 km/h (12 mph)
- HINT:
- As vehicle speed increases, the cycle of the signal waveform narrows.
Waveform 2 (Reference): Using an oscilloscope:
OK Item
Condition
Tool setting
1 V/DIV., 2 μsec/DIV.
Vehicle condition
Turn the ignition switch to the ON position.
| Integration Control & Panel Assembly (w/o Navigation System) |
| Symbols (Terminal No.) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
| +B (C4-1) - Body ground |
O - Body ground |
Battery |
Always |
10 to 14 V |
| ACC (C4-2) - Body ground |
GR - Body ground |
Ignition Switch Signal |
Turn the ignition switch to the off → ON position |
Below 1 V → 10 to 14 V |
| LP (C4-4) - Body ground |
P - Body ground |
Security Indicator Signal |
Turn the ignition switch to the ON position, security indicator light ON → OFF |
Below 1 V → 10 to 14 V |
| MPX- (C4-5) |
L - Body ground |
Multiplex Communication Signal |
- |
- |
| P-AB (C4-6) - Body ground |
BR - Body ground |
Passenger Airbag Off Indicator Light Signal |
Turn the ignition switch to the ON position, passenger airbag off indicator light OFF → ON |
Below 1 V → 10 to 14 V |
| GND (C4-7) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
| ILL+ (C4-8) - Body ground |
G - Body ground |
Illumination Signal |
Combination switch OFF → Head |
Below 1 V → 10 to 14 V |
| IG+ (C4-9) - Body ground |
LG - Body ground |
Ignition Switch Signal |
Ignition switch signal |
Below 1 V → 10 to 14 V |
| F (C4-11) - Body ground |
V - Body ground |
Turn Light Signal |
Turn indicator light OFF → ON |
Below 1 V → 10 to 14 V |
| MPX - (C4-12) |
R - Body ground |
Multiplex Communication Signal |
- |
- |
| PAON (C4-13) - Body ground |
Y - Body ground |
Passenger Airbag On Indicator Light Signal |
Turn the ignition switch to the ON position, passenger airbag on indicator light OFF → ON |
Below 1 V → 10 to 14 V |
| ILL- (C4-14) - Body ground |
W - Body ground |
Illumination Signal |
Turn the ignition switch to the ON position, combination switch Head, and light control rheostat position MIN. → MAX. |
Pulse generation (See waveform) |
Waveform (Reference): Using an oscilloscope:
OK: Item
Condition
Tool setting
5 V/DIV., 2 ms/DIV.
Vehicle condition
Turn the ignition switch to the ON position, light control rheostat is in the MID position.
| Multi-Display Assembly (w/ Navigation System) |
| Symbols (Terminal No.) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
| GND (M5-3) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
| IG (M5-10) - Body ground |
LG - Body ground |
Ignition Switch Signal |
Turn the ignition switch to the off → ON position |
Below 1 V → 10 to 16 V |
| ACC (M5-11) - Body ground |
GR - Body ground |
Ignition Switch Signal |
Turn the ignition switch to the off → ON position |
Below 1 V → 10 to 16 V |
| +B (M5-12) - Body ground |
G - Body ground |
Battery |
Always |
10 to 16 V |
| PBEW (M5-21) - Body ground |
O - Body ground |
Passenger Seat Belt Indicator Light Signal |
Turn the ignition switch to the ON position, passenger seat belt indicator light OFF → ON |
Pulse generation (See waveform) |
Waveform (Reference): Using an oscilloscope:
OK: Item
Condition
Tool setting
5 V/DIV., 200 ms/DIV.
Vehicle condition
Turn the ignition switch to the ON position, p-belt indicator light blinks.
| COMBINATION METER INNER CIRCUIT |
*2: w/o AFS
*3: w/ Navigation System
| Terminal No. |
Wire harness side |
|
| C8 |
1 |
Ground (Power Ground) |
| 2 |
Each part that uses illumination signal (Audio Controller, Integration Control & Panel Assembly, Console Box, Multi-display) |
|
| 3 |
- |
|
| 4 |
Hybrid Vehicle Control ECU (Check Engine) |
|
| 5 |
Multiplex Communication Line, Integration Control & Panel Assembly (*1) |
|
| 6 |
Each part that uses speed signal |
|
| 7 |
- |
|
| 8 |
Gauge Fuse |
|
| 9 |
- |
|
| 10 |
- |
|
| 11 |
- |
|
| 12 |
- |
|
| 13 |
Turn Signal Flasher R |
|
| 14 |
Turn Signal Flasher L |
|
| 15 |
ECU-B Fuse |
|
| 16 |
DOME Fuse |
|
| C9 |
1 |
Ground (Signal Ground) |
| 2 |
Ground (Fuel Ground) |
|
| 3 |
- |
|
| 4 |
Multiplex Communication Line |
|
| 5 |
- |
|
| 6 |
- |
|
| 7 |
- |
|
| 8 |
Hybrid Vehicle Control ECU (Power Meter) |
|
| 9 |
Steering Pad Switch (DISP) |
|
| 10 |
Headlight Beam Level Control ECU (*2) |
|
| 11 |
- |
|
| 12 |
- |
|
| 13 |
Light Control Rheostat |
|
| 14 |
Light Control Rheostat |
|
| 15 |
Light Control Rheostat |
|
| 16 |
Light Control Rheostat (Tail Cancel Switch) |
|
| 17 |
Light Control Rheostat (ODO/TRIP Switch) |
|
| 18 |
ABS & Traction Actuator Assembly |
|
| 19 |
Fuel Sender Gauge Assembly |
|
| 20 |
Occupant Classification Sensor |
|
| 21 |
Engine Oil Level Sensor |
|
| 22 |
Multi-display (*3) |
|
| 23 |
- |
|
| 24 |
Washer Level Warning Switch |
|