Climate Control Unit Inputs and Outputs
CONNECTOR A
| Cavity | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| 1 | WHT | B-CAN H | B-CAN communication line | -- |
| 2 | GRY | S5V | Power source for humidity sensor, A/C pressure sensor, and air mix control motor (driver's, passenger's and rear) | With ignition switch ON (II): about 5 V |
| 3 | YEL | Hum | Inputs humidity sensor signal | -- |
| 4 | LT BLU | Tr | Inputs in-car temperature sensor signal | -- |
| 5 | RED | S-COM | Ground exclusive for sensor | Less than 0.5 V at all times |
| 6 | BLU | BLW-V (Fr) | Feed back signal of power transistor drain voltage | With ignition switch ON (II): battery voltage (depending on blower motor speed) |
| 7 | RED | BLW-G (Fr) | Outputs power transistor gate voltage | Fan switch to MAX: about 10 V Fan switch to MIN: about 2 V |
| 8 | LT GRIM/BLK | M-HOT(Ps) | Drives passenger's air mix control motor on the HOT side | Drive on HOT side: battery voltage |
| 9 | PUR | M-COOL (Ps) | Drives passenger's air mix control motor on the COOL side | Drive on COOL side: battery voltage |
| 10 | YEL | FRS | The recirculation control motor on the FRESH side | Drive on FRESH side: battery voltage |
| 11 | BLU/ORN | REC | The recirculation control motor on the RECIRCULATE side | Drive on FRESH side: battery voltage |
| 12 | PNK | M-HOT (Rr) | Rear air mix control motor on the HOT side | Drive on HOT side: battery voltage |
| 13 | GRY | M-COOL (Rr) | Rear air mix control motor on the COOL side | Drive on COOL side: battery voltage |
| 14 | ORN | M-COOL (Dr) | Drives driver's air mix control motor on the COOL side | Drive on COOL side: battery voltage |
| 15 | RED/BLK M-HOT(Dr) | Drives driver's air mix control motor on the HOT side | Drive on HOT side: | battery voltage |
| 16 | GRN | M-DEF (Fr) | Front mode control motor on the DEF side | Drive on DEF side: battery voltage |
| 17 | GRN/WHT | M-VENT(Fr) | Front mode control motor on the VENT side | Drive on VENT side: battery voltage |
| 18 | YEL | IG2 | IG2 power supply | With ignition switch ON (II): battery voltage |
| 19 | LT GRN | B-CAN L | B-CAN communication line | -- |
| 21 | YEL | AMD-P (Dr) | Outputs driver's air mix control motor potentiometer signal | Drive on COOL side: about 1.5 V Drive on HOT side: about 4.5 V |
| 22 | ORN | AMD-P (Ps) | Outputs passenger's air mix control motor potentiometer signal | Drive on COOL side: about 1.5 V Drive on HOT side: about 4.5 V |
| 23 | LT GRN | Pd | A/C pressure sensor signal | With A/C switch ON: about 1.4-4.8 V (depending on A/C pressure) |
| 24 | PUR | Tsun | Inputs sunlight sensor signal | -- |
| 25 | PNK | Tarn | Inputs outside air temperature sensor signal | -- |
| 26 | BRN | Teva (Fr) | Inputs front evaporator temperature sensor signal | -- |
| 27 | WHT/BLU | Teva (Rr) | Inputs rear evaporator temperature sensor signal | -- |
| 29 | BLU | MODE 4 | Inputs front mode control motor signal 4 | -- |
| 30 | BLU/BLK | MODE 3 | Inputs front mode control motor signal 3 | -- |
| 31 | LT BLU | MODE 2 | Inputs front mode control motor signal 2 | -- |
| 32 | PNK | MODE1 | Inputs front mode control motor signal 1 | -- |
| 33 | GRY | MODE 3 | Inputs recirculation control motor signal 3 | -- |
| 34 | BLK | MODE 2 | Inputs recirculation control motor signal 2 | -- |
| 35 | WHT | MODE1 | Inputs recirculation control motor signal 1 | -- |
| 36 | BLK | GND | Climate control unit ground (G403) | Less than 0.2 V at all times |
CONNECTOR B
| Cavity | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| 1 | GRN | BUS DATA | Front-Rear communication | -- |
| 2 | BLU | DISP-SI | Outputs Audio-HVAC display unit A/C communication data | -- |
| 3 | PUR | DISP-CLK | Audio-HVAC display unit A/C communication data clock | -- |
| 4 | BLU | BLW-G (Rr) | Outputs rear power transistor gate voltage | Fan switch to MAX: about 10 V Fan switch to MIN: about 2 V |
| 5 | RED/GRN | BLW-V (Rr) | Feed back signal of rear power transistor drain voltage | With ignition switch ON (II): battery voltage (depending on blower motor speed) |
| 6 | LT BLU | ILL+ | Power source for illumination | With lighting switch ON: battery voltage |
| 7 | PUR | AMD-P (Rr) | Outputs rear air mix control motor potentiometer signal | Drive on COOL side: about 0.5 V Drive on HOT side: about 4.5 V |
| 9 | BRN/WHT | M-HEAT (Rr) | Rear mode control motor on the HEAT side | Drive on HEAT side: battery voltage |
| 10 | BLK | M-VENT (Rr) | Rear mode control motor on the VENT side | Drive on VENT side: battery voltage |
| 11 | LT GRN | Rr DEF Rly | Signal for rear window defogger relay | -- |
| 12 | YEL | ILL- | Ground for illumination | -- |