Climate Control Unit Inputs and Outputs
WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
CONNECTOR A
TERMINALS DESCRIPTION
| Cavity | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| 1 | BLK | GND | Climate control unit ground (G403) | Less than 0 5 V at all times |
| 3 | RED | DISP CLK | Inputs clock signal from Audio-HVAC display | With ignition switch ON (II), or vehicle in ON mode pulses (about 2 5V) |
| 4 | PUR | DISP SO | Outputs display data to Audio-HVAC display | With ignition switch ON (II), or vehicle in ON mode pulses (about 2 5 V) |
| 5 | BLU | M-DEF (Ps) | Drives passenger's mode control motor to DEF | With ignition switch ON (II), or vehicle in ON mode, and motor moving to DEF battery voltage |
| 6 | GRY | M-VENT (Ps) | Drives passenger's mode control motor to VENT | With ignition switch ON (II), or vehicle in ON mode, and motor moving to VENT battery voltage |
| 7 | GRY | M-DEF (Dr) | Drives driver's mode control motor to DEF | With ignition switch ON (II), or vehicle in ON mode, and motor moving to DEF battery voltage |
| 8 | WHT | M-VENT (Dr) | Drives driver's mode control motor to VENT | With ignition switch ON (II), or vehicle in ON mode, and motor moving to VENT battery voltage |
| 9 | LT BLU | M-COOL (Ps) | Drives passenger's air mix control motor to COOL | With ignition switch ON (II), or vehicle in ON mode, and motor moving to COOL battery voltage |
| 10 | LT GRN | M-HOT (Ps) | Drives passenger's air mix control motor to HOT | With ignition switch ON (II), or vehicle in ON mode, and motor moving to HOT battery voltage |
| 11 | LT BLU | M-COOL (Dr) | Drives driver's air mix control motor to COOL | With ignition switch ON (II), or vehicle in ON mode, and motor moving to COOL battery voltage |
| 12 | PNK | M-HOT (Dr) | Drives driver's air mix control motor to HOT | With ignition switch ON (II), or vehicle in ON mode, and motor moving to HOT battery voltage |
| 15 | LT GRN | IG2 | IG2 power supply | With ignition switch ON (II), or vehicle in ON mode battery voltage |
| 17 | GRN | MODE 1 (Ps) | Passenger's mode control motor position feedback | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |
| 18 | BRN | MODE 2 (Ps) | Passenger's mode control motor position feedback | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |
| 19 | BLU | MODE 3 (Ps) | Passenger's mode control motor position feedback | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |
| 20 | LT GRN | MODE 4 (Ps) | Passenger's mode control motor position feedback | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |
| 21 | LT GRN | MODE 1 (Dr) | Driver's mode control motor position feedback | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |
| 22 | BRN | MODE2 (Dr) | Driver's mode control motor position feedback | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |
| 23 | YEL | MODE 3 (Dr) | Driver's mode control motor position feedback | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |
| 24 | BLU | MODE 4 (Dr) | Driver's mode control motor position feedback | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |
| 25 | GRY | AMD-P (Dr) | Driver's air mix control motor position feedback | With ignition switch ON (II), or vehicle in ON mode between 0 5 V and 4 5 V (depending on motor position) |
| 26 | YEL | AMD-P (Ps) | Passenger's air mix control motor position feedback | With ignition switch ON (II), or vehicle in ON mode between 0 5V and 4 5V (depending on motor position) |
| 27 | BLU | BLW-V | Feedback of power transistor drain voltage | With ignition switch ON (II), or vehicle in ON mode, and fan switch OFF about 8 V Voltage decreases as fan speed increases |
| 28 | YEL | BLW-G | Outputs power transistor gate voltage | With ignition switch ON (II), or vehicle in ON mode, and fan switch at MIN about 2 V Voltage increases to about 10 V with fan switch at MAX |
| 30 | GRY | ILL + | Power source for illumination | With combination light switch ON battery voltage |
CONNECTOR B
TERMINALS DESCRIPTION
| Cavity | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| 1 | RED | Rr DEF LED | Switches rear window defogger/mirror defogger button LED ON/OFF | - |
| 2 | PNK | DEF LED | Switches defroster button LED ON/OFF | - |
| 3 | LT BLU | PS IND PWM | Inputs indicator LED PWM (Pulse Width Modulation) control signal | - |
| 5 | PUR | PS IN 1 | Inputs AUTO button signal | - |
| 6 | WHT | PS IN 2 | Inputs passenger's temperature up button signal | - |
| 7 | YEL | PS IN 3 | Inputs passenger's temperature down button signal | - |
| 8 | BRN | PS IN 4 | Inputs passenger's MODE button signal | - |
| 9 | GRN | PS IN 5 | Inputs rear window defogger/mirror defogger button signal | - |
| 10 | GRY | PS IN 6 | Inputs A/C button signal | - |
| 11 | BLU | PS IN 7 | Inputs recirculation button signal | - |
| 12 | LT GRN | PS IN 8 | Inputs defroster button signal | - |
| 13 | PUR | SYNC LED | Switches SYNC button LED ON/OFF | - |
| 14 | ORN | FR LED | Switches recirculation button LED ON/OFF | - |
| 15 | WHT | DR IND PWM | Inputs indicator LED PWM (Pulse Width Modulation) control signal | - |
| 17 | BRN | DR IN 1 | Inputs AUTO button signal | - |
| 18 | GRN | DR IN 2 | Inputs driver's temperature up button signal | - |
| 19 | GRY | DR IN 3 | Inputs driver's temperature down button signal | - |
| 20 | BLU | DR IN 4 | Inputs driver's MODE button signal | - |
| 21 | LT GRN | DR IN 5 | Inputs SYNC button signal | - |
| 22 | ORN | DR IN 6 | Inputs FAN up button signal | - |
| 23 | PNK | DR IN 7 | Inputs FAN down button signal | - |
| 24 | RED | DR IN 8 | Inputs FAN ON/OFF button signal | - |
CONNECTOR C
TERMINALS DESCRIPTION
| Cavity | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| 1 | RED | S-COM | Ground for sensors | Less than 0 5 V at all times |
| 2 | BRN | S5V | Power source for sensors | With ignition switch ON (II), or vehicle in ON mode about 5 V |
| 4 | ORN | AC SI | Outputs NAVI communication data | With ignition switch ON (II), or vehicle in ON mode pulses (about 2 5 V) |
| 5 | PUR | AC SO | Inputs NAVI communication data | With ignition switch ON (II), or vehicle in ON mode pulses (about 2 5 V) |
| 6 | BRN | AC CLK | Inputs clock signal from NAVI | With ignition switch ON (II), or vehicle in ON mode pulses (about 2 5 V) |
| 7 | BLU | CAN-LO | B-CAN communication line | With ignition switch ON (II), or vehicle in ON mode pulses (about 2 5 V) |
| 8 | PNK | CAN-HI | B-CAN communication line | With ignition switch ON (II), or vehicle in ON mode pulses (about 2 5 V) |
| 9 | PUR | FRS | Drives recirculation control motor to FRESH | With ignition switch ON (II), or vehicle in ON mode, and motor moving to FRESH battery voltage |
| 10 | ORN | REC | Drives recirculation control motor to RECIRCULATE | With ignition switch ON (II), or vehicle in ON mode, and motor moving to RECIRCULATE battery voltage |
| 11 | YEL | Pd | A/C pressure sensor signal | With engine running and A/C compressor clutch engaged about 1 4-4 8 V (depending on A/C pressure) |
| 12 | YEL | Hum | Inputs humidity sensor signal | With ignition switch ON (II), or vehicle in ON mode between 10V and 4 0V (depending on humidity) |
| 14 | PUR | Tsum | Inputs sunlight sensor signal | With ignition switch ON (II), or vehicle in ON mode, and vehicle in direct sunlight Less than 3 5V Voltage rises above 3 6V when vehicle is out of direct sunlight |
| 15 | LT BLU | Tr | Inputs in-car sensor signal | With ignition switch ON (II), or vehicle in ON mode between 10V and 4 0V (depending on in-car temperature) |
| 16 | BRN | Teva | Inputs evaporator temperature sensor signal | With ignition switch ON (II), or vehicle in ON mode between 10V and 4 0V (depending on evaporator temperature) About 2 5 V at 72°F (22°C) |
| 17 | WHT | Tarn | Inputs outside air temperature sensor signal | With ignition switch ON (II), or vehicle in ON mode between 10 V and 4 0 V (depending on ambient temperature) |
| 18 | GRN | MODE1 | Recirculation control motor position feedback 1 signal | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |
| 19 | BLU | MODE 2 | Recirculation control motor position feedback 2 signal | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |
| 20 | ORN | MODE 3 | Recirculation control motor position feedback 3 signal | With ignition switch ON (II), or vehicle in ON mode about 0 V or about 5 V (depending on motor position) |