HVAC Control Unit Inputs and Outputs
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
HVAC CONTROL UNIT CONNECTOR TERMINALS REFERENCE CHART
| Cavity | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| 1 | LT GRN | IG2 | IG2 power supply | With ignition switch ON (II): battery voltage |
| 2 | PUR | M-FRS | Output to drive recirculation control motor to FRESH side | With ignition switch ON (II) and recirculation control motor moving to FRESH: battery voltage |
| 3 | ORN | M-REC | Output to drive recirculation control motor to RECIRCULATE side | With ignition switch ON (II) and recirculation control motor moving to RECIRCU: battery voltage |
| 4 | LT BLU | M-COOL | Output to drive front air mix control motor to COOL side | With ignition switch ON (II) and front air mix control motor moving to COOL: battery voltage |
| 5 | PNK | M-HOT | Output to drive front air mix control motor to HOT side | With ignition switch ON (II) and front air mix control motor moving to HOT: battery voltage |
| 6 | WHT | M-VENT | Outputs to drive front mode control motor to VENT side | With ignition switch ON (II) and front mode control motor moving to VENT: battery voltage |
| 7 | GRN | M-DEF | Outputs to drive front mode control motor to DEF side | With ignition switch ON (II) and front mode control motor moving to DEF: battery voltage |
| 8 | GRY | ILL+ | Inputs voltage for illumination | With combination light switch ON: battery voltage |
| 9 | BLU | BLW-V | Feedback signal of front power transistor drain voltage | With ignition switch ON (II): about 0 V-battery voltage (depending on blower motor speed) |
| 10 | YEL | BLW-G | Outputs front power transistor gate voltage | With ignition switch ON (II) and fan control button OFF: less than 0.2 V With ignition switch ON (II) and fan control button ON: about 4.0 V-battery voltage (depending on blower motor control) |
| 11 | ORN | BUS-DATA | Front-Rear communication | -- |
| 12 | BLK | GND | Ground for climate control unit (G403) | Less than 0.2 V at all times |
| 13 | YEL | SENS-COM | Sensor ground | Less than 0.2 V at all times |
| 14 | RED | ILL- (LED) | Detects illumination control signal | With illumination switch ON: changed voltage (depending on dashlights brightness controller) |
| 15 | GRN | L-MODE 1 | Inputs recirculation control motor position feedback | -- |
| 16 | BLU | L-MODE 2 | Inputs recirculation control motor position feedback | -- |
| 17 | RED | L-MODE 3 | Inputs recirculation control motor position feedback | -- |
| 18 | LT GRN | MODE 1 | Inputs front mode control motor position feedback | -- |
| 19 | BRN | MODE 2 | Inputs front mode control motor position feedback | -- |
| 20 | PUR | MODE 3 | Inputs front mode control motor position feedback | -- |
| 21 | LT BLU | MODE 4 | Inputs front mode control motor position feedback | -- |
| 22 | BRN | Teva | Detects evaporator temperature sensor signal | With ignition switch ON (II): about 1.0-4.0 V (depending on evaporator temperature) |
| 23 | PNK | Pd | A/C pressure sensor signal | With A/C switch ON: about 0.4-4.8 V (depending on A/C pressure) |
| 24 | GRY | AMD-P | Detects potentiometer signal of front air mix control motor | With ignition switch ON (II): about 1.0-4.0 V (depending on front air mix control motor position) |
| 25 | BRN | S5V | Outputs sensor 5 V | With ignition switch ON (II): about 5.0 V |
| 26 | PNK | B-CAN H | B-CAN communication signal | With ignition switch ON (II): pulses |
| 27 | Not used | Not used | -- | -- |
| 28 | BLU | B-CAN L | B-CAN communication signal | With ignition switch ON (II): pulses |