HVAC Control Unit Inputs and Outputs
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 |