Lexus IS250 IS220d GSE20 ALE20 - METER
METER / GAUGE SYSTEM - TERMINALS OF ECU
| Combination Meter Assembly |
*: for 2AD-FHV
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| E2 (J34-1) - Body Ground | W-B - Body ground | Ground | Always | Below 1 V |
| FE (J34-2) - Body ground | BR - Body ground | Ground (Fuel ground) | Always | Below 1 V |
| FSLH (J34-3) (*) - Body ground | BR - Body ground | Ground (Fuel ground) | Always | Below 1 V |
| +S (J34-5) - Body ground | P - Body ground | Speed signal (Output) | Turn the wheel slowly | Pulse generation (See waveform 1) |
| MPX+ (J34-6) - Body ground | BR - Body ground | Multiplex communication signal | - | - |
| FSRH (J34-7) - Body ground | SB - Body ground | Fuel signal | Engine switch on (IG), fuel level is FULL | Below 1 V |
| Engine switch on (IG), fuel level is EMPTY | 4 to 7 V | |||
| TC (J34-8) - Body ground | P - Body ground | Light control rheostat signal | Engine switch on (IG), the light control rheostat knob is in the MAX. position (turned fully clockwise) | 4 to 6 V |
| Engine switch on (IG), the light control rheostat knob is in the MIN. position (turned fully counterclockwise) | Below 1 V | |||
| ILL+ (J34-9) - Body ground | V - Body ground | Light control rheostat signal | Engine switch on (IG), combination switch is not OFF | 4 to 6 V |
| B (J34-11) - Body ground | G - Body ground | Turn indicator light signal | Engine switch on (IG), turn signal LH indicator light OFF | Below 1 V |
| Engine switch on (IG), turn signal LH indicator light ON | 10 to 14 V | |||
| EFI (J34-12) - Body ground | O - Body ground | Ignition switch signal | Engine switch off | Below 1 V |
| Engine switch on (IG) | 10 to 14 V | |||
| ES (J34-13) - Body ground | W-B - Body ground | Ground (Signal ground) | Always | Below 1 V |
| ET (J34-14) - Body ground | Y - Body ground | Ground (Rheostat ground) | Always | Below 1 V |
| S (J34-16) - Body ground | W - Body ground | Tachometer signal | Engine switch on (IG), engine idle speed | Pulse generation (See waveform 2) |
| SI (J34-17) - Body ground | V - Body ground | Speed signal (Input) | Engine switch on (IG), turn the wheel slowly | Pulse generation (See waveform 1) |
| MPX- (J34-18) - Body ground | BR - Body ground | Multiplex communication signal | - | - |
| FR (J34-19) - Body ground | SB - Body ground | Fuel signal | Engine switch on (IG), fuel level is FULL | Below 1 V |
| Engine switch on (IG), fuel level is EMPTY | 4 to 7 V | |||
| MSSL (J34-20) - Body ground | V - Body ground | Steering pad switch signal | Engine switch on (IG), DISP switch off | 4 to 6 V |
| Engine switch on (IG), DISP switch ON | Below 1 V | |||
| TR (J34-21) - Body ground | B - Body ground | Light control rheostat signal | Engine switch on (IG), the light control rheostat knob is in the MIN. position (turned fully counterclockwise). | Below 1 V |
| Engine switch on (IG), the light control rheostat knob is in the MAX. position (turned fully clockwise). | 4 to 6 V | |||
| B (J34-23) - Body ground | L - Body ground | Battery | Always | 10 to 14 V |
| B (J34-24) - Body ground | LG - Body ground | Battery | Always | 10 to 14 V |
| PBLT (J35-3) - Body ground | P - Body ground | Passenger seat belt warning light signal | Sit in the passenger seat, engine switch on (IG), passenger seat belt fastened | 10 to 14 V |
| Sit in the passenger seat, engine switch on (IG), p- belt warning light blinks | Pulse generation (See waveform 3) | |||
| P/SB (J35-4) - Body ground | L - Body ground | Passenger seat inner belt signal | Engine switch on (IG), passenger seat belt unfastened | 10 to 14 V |
| Engine switch on (IG), passenger seat belt fastened | Below 1 V | |||
| RSEL (J35-5) - Body ground | GR - Body ground | Satellite switch RH signal | Engine switch on (IG), satellite switch RH off | 4 to 6 V |
| Engine switch on (IG), satellite switch RH ON | Below 1 V | |||
| LSEL (J35-6) - Body ground | O - Body ground | Satellite switch LH signal | Engine switch on (IG), satellite switch LH off | 4 to 6 V |
| Engine switch on (IG), satellite switch LH ON | Below 1 V | |||
| SET (J35-7) - Body ground | V - Body ground | Satellite switch ON/OFF signal | Engine switch on (IG), satellite switch ON/OFF off | 4 to 6 V |
| Engine switch on (IG), satellite switch ON/OFF ON | Below 1 V | |||
| ILL- (J35-9) - Body ground | W - Body ground | Illumination signal | Engine switch on (IG) | 10 to 14 V |
| B (J35-10) - Body ground | R - Body ground | Turn indicator light signal | Engine switch on (IG), turn signal RH indicator light OFF | Below 1 V |
| Engine switch on (IG), turn signal RH indicator light ON | 10 to 14 V | |||
| EFI (J35-11) - Body ground | LG - Body ground | Check engine indicator light signal | Engine switch on (IG), CHECK ENGINE warning light ON | Below 1 V |
| Engine switch on (IG), CHECK ENGINE warning light OFF | 10 to 14 V | |||
| J35-13 (OIL) (*) - Body ground | BR - Body ground | Engine oil level signal | Engine switch on (IG), engine oil level is full | Below 1 V |
| Engine switch on (IG), engine oil level is low | 10 to 14 V | |||
| J35-14 (S) (*) - Body ground | O - Body ground | Engine oil pressure signal | Engine switch on (IG), engine oil pressure is high | Below 1 V |
| Engine switch on (IG), engine oil pressure is low | 10 to 14 V | |||
| SW (J35-15) - Body ground | LG - Body ground | Brake fluid level warning light signal | Engine switch on (IG), BRAKE warning light OFF | 10 to 14 V |
| Engine switch on (IG), BRAKE warning light ON | Below 1.5 V | |||
| J35-16 (*) - Body ground | BR - Body ground | Fuel sedimenter warning switch signal | Engine switch on (IG), SEDIMENT warning light ON | 10 to 14 V |
| Engine switch on (IG), SEDIMENT warning light OFF | Below 1 V |
Waveform 1 (Reference) : Using an oscilloscope:
| 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:
| Item | Condition |
| Tool setting | 5 V/DIV., 10 ms./DIV. |
| Vehicle condition | Engine idle speed |
Waveform 3 (Reference) : Using an oscilloscope:
| Item | Condition |
| Tool setting | 5 V/DIV., 200 ms./DIV. |
| Vehicle condition | Engine switch on (IG), p-belt warning light blinks |
| COMBINATION METER INNER CIRCUIT |
*1: for 2AD-FHV
*2: without Navigation System
*3: with Navigation System
| Terminals No. | Wire harness side | |
| J34 | 1 | Ground |
| 2 | Ground (FE) | |
| 3 | Ground (FSLH) (*1) | |
| 4 | - | |
| 5 | Each part that uses speed signal | |
| 6 | Multiplex Communication Line (MPX+) | |
| 7 | Fuel Sender Gauge Assembly (FSRH) (*1) | |
| 8 | Light Control Rheostat (TC) | |
| 9 | Light Control Rheostat (ILL+) | |
| 10 | - | |
| 11 | Turn Signal Flasher (B) | |
| 12 | MET Fuse | |
| 13 | Ground (Signal Ground) | |
| 14 | Light Control Rheostat (ET) | |
| 15 | - | |
| 16 | ECM (S) | |
| 17 | ABS & Traction Actuator Assembly | |
| 18 | Multiplex Communication Line (MPX-) | |
| 19 | Fuel Sender Gauge Assembly (FR) | |
| 20 | Steering Pad Switch (DISP) | |
| 21 | Light Control Rheostat (TR) | |
| 22 | - | |
| 23 | DOME Fuse | |
| 24 | MPX-B Fuse | |
| J35 | 1 | - |
| 2 | - | |
| 3 | Integration Control & Panel Assembly (*2)/Multi-display (*3) | |
| 4 | Passenger Side Front Seat Inner Belt Assembly | |
| 5 | Satellite Switch (RSEL) | |
| 6 | Satellite Switch (LSEL) | |
| 7 | Satellite Switch (SET) | |
| 8 | - | |
| 9 | Illumination Parts | |
| 10 | Turn Signal Flasher (B) | |
| 11 | - | |
| 12 | ECM (EFI) | |
| 13 | Engine Oil Level Sensor (*1) | |
| 14 | Engine Oil Pressure Switch (*1) | |
| 15 | Brake Fluid Level Warning Switch | |
| 16 | Fuel Sedimenter Warning Switch (*1) | |