Terminals Of Ecu
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
WIRING SPECIFICATION
| Symbols (Terminals No.) | Wiring Color | Condition | STD Voltage (V) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| GND <--> Body ground (A11-1 <--> Body ground) | W-B <--> Body ground | Always | Below 1.0 Ω | ||||||||
| MPX+(A11-2) | GR-B | Multiplex communication circuit | - | ||||||||
| ACC <--> GND (A11-3 <--> A11-1) | GR <--> W-B | Turn ignition switch to ACC. | 10 - 14 V | ||||||||
| MPX- (A11-4)(3), (4) | GR-B | Multiplex communication circuit | - | ||||||||
| BLW <--> GND (A11-5 <--> A11-1) | LG-B <--> W-B | Blower fan speed OFF --> M2 --> HI | Pulse generation | ||||||||
| SOL+ <--> SOL- (A11-6 <--> A11-7) | P <--> Y-B | A/C magnetic clutch to ON. | Pulse generation | ||||||||
| RDFGR <--> GND (A11-8 <--> A11-1) | W <--> W-B | IG ON. Rear defogger switch to OFF. | 10 - 14 V | ||||||||
| IG ON. Rear defogger switch to ON. | Below 1.0 V | ||||||||||
| IG <--> GND (A11-9 <--> A11-1) | LG-R <--> W-B | IG ON. | 10 - 14 V | ||||||||
| IG OFF. | O V | ||||||||||
| TSDr <--> GND (A11-19 <--> A11-1) | L <--> W-B | IG ON. Solar sensor subjected to electric light. | 0.8 - 4.3 V | ||||||||
| IG ON. Solar sensor cover by a cloth. | Below 0.8 V | ||||||||||
| TSPa <--> GND (A11-20 <--> A11-1) | G-R <--> W-B | IG ON. Solar sensor subjected to electric light. | 0.8 - 4.3 V | ||||||||
| IG ON. Solar sensor cover by a cloth. | Below 0.8 V | ||||||||||
| +B <--> GND (A11-21 <--> A11-1) | W-R <--> W-B | Always | 10 - 14 V | ||||||||
| DGS <--> SG-1 (A11-29 <--> A13-8) | BR-R <--> Y | After 30 seconds from IG ON and the sensor is exposed to the exhaust gas. | 1.0 - 4.5 V | ||||||||
| DS1 <--> GND (A12-1 <--> A11-1) | V <--> W-B | IG ON. Blower motor: Operate Mode selector: BI-LEVEL Intelligent swing register: ON |
Pulse generation | ||||||||
| DS2 <--> GND (A12-2 <--> A11-1) | G <--> W-B | IG ON. Blower motor: Operate Mode selector: BI-LEVEL Intelligent swing register: ON |
Pulse generation | ||||||||
| PS1 <--> GND (A12-3 <--> A11-1) | R-B <--> W-B | IG ON. Blower motor: Operate Mode selector: BI-LEVEL Intelligent swing register: ON |
Pulse generation | ||||||||
| PS2 <--> GND (A12-4 <--> A11-1) | B <--> W-B | IG ON. Blower motor: Operate Mode selector: BI-LEVEL Intelligent swing register: ON |
Pulse generation | ||||||||
| PS3 <--> GND (A12-5 <--> A11-1) | P <--> W-B | IG ON. Blower motor: Operate Mode selector: BI-LEVEL Intelligent swing register: ON |
Pulse generation | ||||||||
| PS4 <--> GND (A12-6 <--> A11-1) | Y-R <--> W-B | IG ON. Blower motor: Operate Mode selector: BI-LEVEL Intelligent swing register: ON |
Pulse generation | ||||||||
| DUAL <--> DrGND (A12-7 <--> A12-11) | O <--> LG-R | IG ON. Dual switch ON. | Below 1.0 V | ||||||||
| IG ON. Dual switch OFF. | 10 - 14 V | ||||||||||
| DS3 <--> GND (A12-8 <--> A11-1) | B-R <--> W-B | IG ON. Blower motor: Operate Mode selector: BI-LEVEL Intelligent swing register: ON |
Pulse generation | ||||||||
| DS4 <--> GND (A12-9 <--> A11-1) | G-B <--> W-B | IG ON. Blower motor: Operate Mode selector: BI-LEVEL Intelligent swing register: ON |
Pulse generation | ||||||||
| DUIND+ <--> DUIND- (A12-10 <--> A12-13) | G-R <--> B-W | Driver temperature and passenger temperature are different. | 5 - 14 V | ||||||||
| Driver temperature and passenger temperature are the same. | Below 1.0 V | ||||||||||
| S5-2 <--> SG-5 (A12-15 <--> A13-12) | V-R <--> LG | IG ON. | 4.5 - 5.5 V | ||||||||
| S5-4(1) <--> TSRr(1) (A12-16 <--> A11-30) | GR <--> W-L | IG ON. Rear solar sensor subjected to electric light. | 0.8 - 4.3 V | ||||||||
| IG ON. Rear solar sensor cover by a cloth. | Below 1.0 V | ||||||||||
| PRS <--> SG-5 (A12-17 <--> A13-12) | L-O <--> LG | Refrigerant pressure 0 Mpa (0 kgf.cm, 0 psi). | 0.5 V | ||||||||
| Refrigerant pressure 2.9 Mpa (30 kgf.cm, 427 psi). | 4.5 V | ||||||||||
| TAMOUT (4) <--> GND (A12-18 <--> A11-1) | L <--> W-B | IG ON. | Pulse generation | ||||||||
| PaDN <--> PaGND (A12-19 <--> A12-12) | R-W <--> GR-L | Push passenger temperature switch OFF. | 10 - 14 V | ||||||||
| Push passenger temperature switch ON. | Below 1.0 V | ||||||||||
| PaUP <--> PaGND (A12-20 <--> A12-12) | W <--> GR-L | Push passenger temperature switch OFF. | 10 - 14 V | ||||||||
| Push passenger temperature switch ON. | Below 1.0 V | ||||||||||
| DrDN <--> DrGND (A12-21 <--> A12-11) | P-L <--> LG-R | Push driver temperature switch OFF. | 10 - 14 V | ||||||||
| Push driver temperature switch ON. | Below 1.0 V | ||||||||||
| DrUP <--> DrGND (A12-22 <--> A12-11) | V-W <--> LG-R | Push driver temperature switch OFF. | 10 - 14 V | ||||||||
| Push driver temperature switch ON. | Below 1.0 V | ||||||||||
| PS+B <--> GND (A12-24 <--> A11-1) | R-G <--> W-B | Always | 10 - 14 V | ||||||||
| VX (A13-1)(2) | W | Communication circuit (Between A/C ECU and combination meter) | - | ||||||||
| VY (A13-2)(2) | R | Communication circuit (Between A/C ECU and combination meter) | - | ||||||||
| C-GND (A13-3)(2) | B | Communication circuit (Between A/C ECU and combination meter) | - | ||||||||
| D-SIG (A13-4)(2) | Y | Communication circuit (Between A/C ECU and combination meter) | - | ||||||||
| SHIELD (A13-5)(2) | Shielded | Communication circuit (Between A/C ECU and combination meter) | - | ||||||||
| VMID (A13-7)(2) | G | Communication circuit (Between A/C ECU and combination meter) | - | ||||||||
| TFACEPa <--> SG-4 (A13-14 <--> A13-11) | GR-L <--> Y-G | IG ON. Passenger side duct sensor temperature 25 °C (77 °F). | 1.8 - 2.2 V | ||||||||
| IG ON. Passenger side duct sensor temperature 50 °C(122 °F). | 0.8 - 1.2 V | ||||||||||
| TFACEDr <--> SG-3 (A13-15 <--> A13-10) | GR-R <--> R-W | IG ON. Passenger side duct sensor temperature 25 °C (77 °F). | 1.8 - 2.2 V | ||||||||
| IG ON. Passenger side duct sensor temperature 50 °C (122 °F). | 0.8 - 1.2 V | ||||||||||
| TR <--> SG-2 (A13-16 <--> A13-9) | W-L <--> Y-B | IG ON. Room temperature 25 °C (77 °F). | 1.8 - 2.2 V | ||||||||
| IG ON. Room temperature 40 °C (104 °F). | 0.8 - 1.2 V | ||||||||||
| NOX <--> SG-1 (A13-17 <--> A13-8) | L-B <--> Y | After 120 seconds from IG ON and the sensor is exposed to the exhaust gas. | 1.0 - 4.5 V | ||||||||
| AMDr1 <--> GND (1 <--> A11-1) | BR <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AMDr2 <--> GND (2 <--> A11-1) | BR-B <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AMDr3 <--> GND (3 <--> A11-1) | BR-W <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AMDr4 <--> GND (4 <--> A11-1) | BR-Y <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AODr1 <--> GND (5 <--> A11-1) | L <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AODr2 <--> GND (6 <--> A11-1) | L-B <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| WVS <--> GND (7 <--> A11-1) | G-W <--> W-B | IG ON. Set temperature control MAX. COOL | Below 1.0 V | ||||||||
| IG ON. Set temperature control MAX. HOT | 10 - 14 V | ||||||||||
| ABOPa <--> GND (8 <--> A11-1) | G-B <--> W-B | During actuator check mode. Display code 0. |
10 - 14 V | ||||||||
| Display code 9. | Below 1.0 V | ||||||||||
| ABSPa <--> GND (9 <--> A11-1) | G-O <--> W-B | During actuator check mode. Display code 0. |
Below 1.0 V | ||||||||
| Display code 9. | 10 - 14 V | ||||||||||
| AMDB <--> GND (10 <--> A11-1) | R-B <--> W-B | Always | 10 - 14 V | ||||||||
| AODr3 <--> GND (12 <--> A11-1) | L-W <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AODr4 <--> GND (13 <--> A11-1) | L-R <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| WVIG <--> GND (14 <--> A11-1) | O <--> W-B | IG ON. | 10 - 14 V | ||||||||
| IG OFF. | 0 V | ||||||||||
| WVO <--> GND (15 <--> A11-1) | G <--> W-B | IG ON. Set temperature control MAX. COOL. | 10 - 14 V | ||||||||
| IG ON. Set temperature control MAX. HOT. | Below 1.0 V | ||||||||||
| ABODr <--> GND (16 <--> A11-1) | GR <--> W-B | During actuator check mode. Display code 0. |
10 - 14 V | ||||||||
| Display code 9. | Below 1.0 V | ||||||||||
| ABSDr <--> GND (17 <--> A11-1) | GR-R <--> W-B | During actuator check mode. Display code 0. |
Below 1.0 V | ||||||||
| Display code 9. | 10 - 14 V | ||||||||||
| S5-3 <--> SG (18 <--> 19) | R-W <--> W-B | IG ON. | 4.5 - 5.5 V | ||||||||
| TPI <--> SG (20 <--> 19) | B-Y <--> W-B | IG ON. Push REC switch. | 4.0 V | ||||||||
| IG ON. Push FRESH switch. | 1.0 V | ||||||||||
| TPBPa <--> SG-7 (21 <--> 37) | B-L <--> W-L | Change display code 9 to display code 0. | 3.5 - 4.5 V | ||||||||
| Change display code 2 to display code 3. | 0.5 - 1.8 V | ||||||||||
| AODB <--> GND (22 <--> A11-1) | R-Y <--> W-B | Always | 10 - 14 V | ||||||||
| AMPa1 <--> GND (23 <--> A11-1) | LG <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AMPa2 <--> GND (24 <--> A11-1) | LG-B <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AMPa3 <--> GND (25 <--> A11-1) | LG-W <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AMPa4 <--> GND (26 <--> A11-1) | LG-R <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AOPa1 <--> GND (27 <--> A11-1) | P <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AOPa2 <--> GND (28 <--> A11-1) | P-B <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AOPa3 <--> GND (29 <--> A11-1) | P-G <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| AOPa4 <--> GND (31 <--> A11-1) | P-L <--> W-B | During actuator check mode. Change display code 0 to display code 9. |
Pulse generation | ||||||||
| S5-5 <--> SG-7 (33 <--> 37) | R <--> W-L | IG ON. | 4.5 - 5.5 V | ||||||||
| AMPB <--> GND (35 <--> A11-1) | Y <--> W-B | Always | 10 - 14 V | ||||||||
| AIF <--> GND (38 <--> A11-1) | G-R <--> W-B | IG ON. Push REC switch. | Below 1.0 V | ||||||||
| IG ON. Push FRESH switch. | 10 - 14 V | ||||||||||
| AIR <--> GND (39 <--> A11-1) | G-Y <--> W-B | IG ON. Push FRESH switch. | Below 1.0 V | ||||||||
| IG ON. Push REC switch. | 10 - 14 V | ||||||||||
| TE <--> SG-7 (42 <--> 37) | L-Y <--> W-L | IG ON. Evaporator temperature 0 °C (32 °F). | 2.0 - 2.4 V | ||||||||
| IG ON. Evaporator temperature 15 °C (59 °F). | 1.4 - 1.8 V | ||||||||||
| TPBDr <--> SG (46<-->19) | B-R <--> W-B | Change display code 9 to display code 0. | 3.5 - 4.5 V | ||||||||
| Change display code 2 to display code 3. | 0.5 - 1.8 V | ||||||||||
| AOPB <--> GND (48 <--> A11-1) | Y-R <--> W-B | Always | 10 - 14 V | ||||||||
|
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WIRING SPECIFICATION
| Symbols (Terminals No.) | Wiring Color | Condition | STD Voltage (V) | ||||
|---|---|---|---|---|---|---|---|
| RLO <--> GND (1 <--> 6) | Y <--> W-B | IG ON. Rear A/C blower switch manual OFF. | Below 1.0 V | ||||
| IG ON. Rear A/C blower switch manual LO. | 10 - 14 V | ||||||
| RSO <--> GND (2 <--> 6) | W-Y <--> W-B | IG ON. Rear A/C switch OFF. | Below 1.0 V | ||||
| IG ON. Rear A/C switch AUTO. | 10 - 14 V | ||||||
| R-B <--> GND (3 <--> 6) | L-W <--> W-B | Always. | 10 - 14 V | ||||
| SFRS <--> GND (4 <--> 6) | V <--> W-B | IG ON. Front A/C blower motor operates. Push "REC" switch. |
10 - 14 V | ||||
| IG ON. Front A/C blower motor operates. Push "FRS" switch. Ambient temperature Below-1 °C |
Below 1.0 V | ||||||
| RMGV <--> GND (5 <--> 6) | G-Y <--> W-B | IG ON. Rear A/C switch OFF. | 10 - 14 V | ||||
| IG ON. Rear A/C AUTO mode. Rear A/C switch ON. | Below 1.0 V | ||||||
| RHI <--> GND (8 <--> 6) | L-R <--> W-B | IG ON. Rear A/C blower switch OFF. | Below 1.0 V | ||||
| IG ON. Rear A/C manual mode. Blower switch HI. | 10 - 14 V | ||||||
| RAUTO <--> GND (9 <--> 6) | W-L <-->W-B | IG ON. Rear A/C manual mode | 10 - 14 V | ||||
| IG ON. Rear A/C AUTO mode | Below 1.0 V | ||||||
| IG <--> GND (10 <--> 6) | B-R <--> W-B | IG ON. | 10 - 14 V | ||||
| RFR2 <--> GND (2) (11 <--> 6) | G-B <--> W-B | IG ON. Rear A/C blower motor speed except to HI. | 10 - 14 V | ||||
| IG ON. Rear A/C blower motor speed to HI. | Below 1.0 V | ||||||
| During actuator check mode. Display code 0. |
10 - 14 V | ||||||
| Display code 2. | Below 1.0 V | ||||||
| DIO <--> GND (12 <--> 6) | Y-B <--> W-B | IG ON. Front A/C blower motor operates. Rear A/C blower motor speed to HI. Rear A/C switch ON. |
10 - 14 V | ||||
| IG ON. Front A/C blower motor operates. Rear A/C blower motor speed to HI. Rear A/C switch OFF. |
Below 1.0 V | ||||||
| EXO <--> GND (13 <--> 6) | G-W <--> W-B | IG ON. Front A/C blower motor operates. Push "FRESH" switch. Rear AUTO mode. Rear A/C switch ON. |
10 - 14 V | ||||
| IG ON. Front A/C blower motor operates. Push "FRESH" switch. Rear AUTO mode. Rear A/C switch OFF. Ambient temperature Below -1 °C |
Below 1.0 V | ||||||
| ROO <--> GND(1) (14 <--> 6) | L-B <--> W-B | IG ON. Front A/C blower motor operates. Rear A/C blower motor speed to HI. Rear A/C switch OFF. |
10 - 14 V | ||||
| IG ON. Front A/C blower motor operates. Rear A/C blower motor speed to HI. Rear A/C switch ON. |
Below 1.0 V | ||||||
| RFR1 <--> GND(1) (15 <--> 6) | G-B <--> W-B | IG ON. Rear A/C blower motor speed except to HI. | 10 - 14 V | ||||
| IG ON. Rear A/C blower motor speed to HI. | Below 1.0 V | ||||||
| During actuator check mode. Display code 0. |
10 - 14 V | ||||||
| Display code 2. | Below 1.0 V | ||||||
| RHR <--> GND (16 <--> 6) | G-O <--> W-B | IG ON. Rear A/C manual mode. Rear A/C blower motor does not operate. |
10 - 14 V | ||||
| IG ON. Rear A/C manual mode. Rear A/C blower motor speed LO or HI. |
Below 1.0 V | ||||||
| During actuator check mode. Display code 0. |
10 - 14 V | ||||||
| Display code 2. | Below 1.0 V | ||||||
|
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WIRING SPECIFICATION
| Symbols (Terminals No.) | Wiring Color | Condition | STD Voltage (V) | ||
|---|---|---|---|---|---|
| RMGV <--> Body ground (1) (L14-11 <--> Body ground) | G-Y <--> Body ground | IG ON. Rear A/C switch to ON. | Below 1.0 V | ||
| IG ON. Rear A/C switch to OFF. | 10 - 14 V | ||||
| SMOK <--> Body ground (L14-16 <--> Body ground) | P-G <--> Body ground | IG ON. Rear A/C switch to AUTO. By using cigarette smoke. |
Above 4.0 V | ||
| IG ON. Rear A/C switch to AUTO. By not using cigarette smoke. |
Below 1.0 V | ||||
| AUTO <--> Body ground (L14-17 <--> Body ground) | W-L <--> Body ground | IG ON. Rear A/C rear seat AUTO indicator light up. | Below 1.0 V | ||
| IG ON. Rear A/C rear seat AUTO indicator does not light up. | 10 - 14 V | ||||
| RHR <--> Body ground (L14-18 <--> Body ground) | G-O <--> Body ground | IG ON. Rear A/C manual mode. Rear A/C blower motor does not operate. |
10 - 14 V | ||
| IG ON. Rear A/C manual mode. Rear A/C blower motor speed LO or HI. |
Below 1.0 V | ||||
| During actuator check mode. Display code 0. |
10 - 14 V | ||||
| Display code 2. | Below 1.0 V | ||||
| RFR <--> Body ground (L14-19 <--> Body ground) | G-B <--> Body ground | IG ON. Rear A/C blower motor speed except to HI. | 10 - 14 V | ||
| IG ON. Rear A/C blower motor speed to HI. | Below 1.0 V | ||||
| During actuator check mode. Display code 0. |
10 - 14 V | ||||
| Display code 2. | Below 1.0 V | ||||
| FRS <--> Body ground (L14-20 <--> Body ground) | GR-L <--> Body ground | IG ON. Front A/C blower motor operates. Push "FRS" switch. Ambient temperature Below-1 °C |
10 - 14 V | ||
| IG ON. Front A/C blower motor operates. Push "REC" switch. |
Below 1.0 V | ||||
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