Climate Control Unit Inputs and Outputs
WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
CONNECTOR A
| Cavity | Wire color | Terminal name | Description | Signal | ||
|---|---|---|---|---|---|---|
| 1 | WHT | + B BACK UP | Battery back up power supply | Battery voltage | ||
| 2(1) | YEL | AC-SI | Outputs audio-navigation communication data | - | ||
| 3 | PNK | IG2 | IG2 Power supply | With ignition switch ON (II): battery voltage | ||
| 4 | LT GRN | B-CAN | B-CAN communication line | - | ||
| 5 | LT BLU | Tr | Inputs in-car temperature sensor signal | - | ||
| 6 | BLU | 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 | ||
| 8 | GRN | S-COM | Ground exclusive for sensor | Less than 0.2 V at all times | ||
| 9 | BLU | BLW-V (F) | Feedback signal of front power transistor drain voltage | With ignition switch ON (II): battery voltage (depending on blower motor speed) | ||
| 10 | RED | BLW-G (F) | Outputs front power transistor gate voltage | Fan switch to MAX: about 12 V Fan switch to MIN: about 4 V |
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| 11 | PUR | AMD-P (D) | 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 |
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| 12 | PNK | M-HOT (D) | Drives driver's air mix control motor on the HOT side | Drive on HOT side: battery voltage | ||
| 13 | LT BLU | M-COOL (D) | Drives driver's air mix control motor on the COOL side | Drive on COOL side: battery voltage | ||
| 14 | LT GRN | M-HOT (P) | Drives passenger's air mix control motor on the HOT side | Drive on HOT side: battery voltage | ||
| 15 | YEL | M-COOL (P) | Drives passenger's air mix control motor on the COOL side | Drive on COOL side: battery voltage | ||
| 16 | GRN | M-DEF (F) | Front mode control motor on the DEF side | Drive on DEF side: battery voltage | ||
| 17 | ORN | M-VENT(F) | Front mode control motor on the VENT side | Drive on VENT side: battery voltage | ||
| 18 | YEL | FRS | Recirculation control motor on the FRESH side | Drive on FRESH side: battery voltage | ||
| 19 | ORN | REC | Recirculation control motor on the RECIRCULATE side | Drive on RECIRCULATE side: battery voltage | ||
| 21(1) | BLU | AC-CLK | Audio-navigation communication data clock | - | ||
| 22(1) | RED | AC-SO | Inputs audio-navigation communication data | - | ||
| 23 | LT BLU | ILL+ | Power source for illumination | With lighting switch ON: battery voltage | ||
| 24 | BRN | Teva (F) | Inputs front evaporator temperature sensor signal | - | ||
| 25 | PUR | ACC | ACC power supply | With ignition switch ACC (I): battery voltage | ||
| 26 | LT GRN | Pd | A/C Pressure sensor signal | With A/C switch ON: about 0.4- 4.8 V (depending on A/C pressure) | ||
| 27 | YEL | Hum | Inputs humidity sensor signal | - | ||
| 28 | PNK | Tarn | Inputs outside air temperature sensor signal | - | ||
| 29 | PUR | Tsun | Inputs sunlight sensor signal | - | ||
| 30 | BLU | AMD-P (P) | 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 |
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| 31 | WHT | MODE 1 | Inputs front mode control motor signal | - | ||
| 32 | LT GRN | MODE 2 | Inputs front mode control motor signal | - | ||
| 33 | PUR | MODE 3 | Inputs front mode control motor signal | - | ||
| 34 | BLU | MODE 4 | Inputs front mode control motor signal | - | ||
| 35 | WHT | MODE 1 | Recirculation control motor position feedback | - | ||
| 36 | BLK | MODE 2 | Recirculation control motor position feedback | - | ||
| 37 | BLK | GND | Climate control unit ground (G506) | Less than 0.2 V at all times | ||
| 38 | GRN | MODE 3 | Recirculation control motor position feedback | - | ||
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CONNECTOR B
| Cavity | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| 1 | GRN | M-COOL (R) | Rear air mix control motor on the COOL side | Drive on COOL side: battery voltage |
| 2 | PNK | M-HOT (R) | Rear air mix control motor on the HOT side | Drive on HOT side: battery voltage |
| 3 | YEL | M-HEAT (R) | Rear mode control motor on the HEAT side | Drive on HEAT side: battery voltage |
| 4 | BLK | M-VENT (R) | Rear mode control motor on the VENT side | Drive on VENT side; battery voltage |
| 5 | PUR | AMD-P (R) | Outputs rear air mix control motor potentiometer signal | Drive on COOL side: about 0.5 V Drive on HOT side: about 4.5 V |
| 6 | LT BLU | Teva(R) | Inputs rear evaporator temperature sensor signal | - |
| 8 | BLU | AUDIO DATA | Communication to audio unit (audio display data) | - |
| 11 | ORN | AC BUS RX | Communication to rear panel | - |
| 12 | GRN | AC BUS TX | Communication to rear panel | - |
| 13 | RED | BLW-V (R) | Feedback signal of rear power transistor drain voltage | With ignition switch ON (II): battery voltage (depending on blower motor speed) |
| 14 | BLU | BLW-G (R) | Outputs rear power transistor gate voltage | Fan switch to MAX: about 10 V Fan switch to MIN: about 2 V |