Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 735 (HEATING, VENTILATION AND AIR CONDITIONING)CLIMATE CONTROLSYSTEM DESCRIPTIONCLIMATE CONTROL UNIT INPUTS AND OUTPUTS
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Climate Control Unit Inputs and Outputs
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Climate Control Unit Inputs and Outputs
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
36P CONNECTOR
CONNECTOR TERMINAL REFERENCE
| Cavity | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| 1 | LT GRN | S-COM | Ground for sensors, air mix control motor, and mode control motor | Less than 0.2V at all times |
| 3 | GRN | S5V | Power source for humidity sensor and air mix control motor | With ignition switch ON (II): about 5V |
| 5 | RED | AMD-P | Outputs air mix control motor potentiometer signal | Drive on COOL side: about 1V Drive on HOT side: about 4V |
| 6 | GRN | CAN | B-CAN communication line | With ignition switch ON (II): pulses |
| 7 | PUR | RrDEF Ry | Signal for rear window defogger relay | With defogger switch OFF: battery voltage With defogger switch ON: 0 V |
| 8 | LT BLU | REC | Drivers recirculation control motor on the RECIRCULATE side | With ignition switch ON (II) and recirculation control motor in position FRESH: battery voltage |
| 9 | GRN | FRS | Drivers recirculation control motor on the FRESH side | With ignition switch ON (II) and recirculation control motor in position RECIRCU: battery voltage |
| 10 | BRN | M-DEF | Mode control motor on the DEF side | With ignition switch ON (II) and mode control motor moving to DEF: battery voltage |
| 11 | RED | M-VENT | Mode control motor on the VENT side | With ignition switch ON (II) and mode control motor moving to VENT: battery voltage |
| 12 | PUR | M-HOT | Air mix control motor on the HOT side | With ignition switch ON (II) and air mix control motor moving to HOT: battery voltage |
| 13 | BLU | M-COOL | Air mix control motor on the COOL side | With ignition switch ON (II) and air mix control motor moving to COOL: battery voltage |
| 14 | BLK | GND | Climate control unit ground (G502) | Less than 0.2 V at all times |
| 15 | LT BLU | BLW-V | Feedback of power transistor drain voltage | With ignition switch ON (II): about 0 V -battery voltage (depending on blower motor speed) |
| 17 | RED | IG2 | IG2 power supply | With ignition switch ON (II): battery voltage |
| 18 | GRY | ILL+ | Power source for illumination | With lighting switch ON: battery voltage |
| 19 | PUR | Tsum | Detects sunlight sensor signal | With ignition switch ON (II) and sensor out of direct sunlight: 3.6-3.7 V or more With ignition switch ON (II) and sensor in direct sunlight: 3.3-3.5 V or less |
| 20 | LT BLU | Tr | Detects in-car temperature sensor signal | With ignition switch ON (II): about 1.0-4.0 V (depending on in-car temperature) |
| 22 | PNK | Tarn | Detects outside air temperature sensor signal | With ignition switch ON (II): about 1.0-4.0 V (depending on outside air temperature) |
| 23 | ORN | Teva | Detects evaporator temperature sensor signal | With ignition switch ON (II): about 1.0-4.0 V (depending on evaporator temperature) |
| 24 | WHT | HUM | Detects humidity sensor signal | With ignition switch ON (II): about 1.0-4.0 V (depending on humidity) |
| 26 | BLU | ACS | Outputs A/C on/off signal | With ignition switch ON (II), normal A/C pressure, and A/C switch ON: less than 0.5 V With ignition switch ON (II), normal A/C pressure, and A/C switch OFF: battery voltage |
| 27 | PNK | MODE1 | Mode control motor position feedback 1 signal | With ignition switch ON (II): about 5 V (depending on motor position) |
| 28 | YEL | MODE 2 | Mode control motor position feedback 2 signal | With ignition switch ON (II): about 5 V (depending on motor position) |
| 29 | WHT | MODE 3 | Mode control motor position feedback 3 signal | With ignition switch ON (II): about 5 V (depending on motor position) |
| 30 | GRY | MODE 4 | Mode control motor position feedback 4 signal | With ignition switch ON (II): about 5 V (depending on motor position) |
| 31 | WHT | AC SI | Communication signal to audio-navigation unit | With ignition switch ON (II): pulses |
| 32 | BRN | AC CLK | Communication signal to audio-navigation unit | With ignition switch ON (II): pulses |
| 33 | YEL | AC SO | Communication signal to audio-navigation unit | With ignition switch ON (II): pulses |
| 34 | ORN | BLW-G | Outputs power transistor gate voltage | With ignition switch ON (II) and fan control button OFF: less than 0.5 V. With ignition switch ON (II) and fan control button ON: about 4.0 V - battery voltage (depending on blower motor control) |
| 36 | BLU | ILL- | Detects illumination control signal | With illumination switch ON: changed voltage (depending on dashlights brightness controller) |
5P CONNECTOR
CONNECTOR TERMINAL REFERENCE
| cavity | wire color | terminal name | Description | Signal |
|---|---|---|---|---|
| 3 | BLK | GND | Climate control unit ground (G502) | Less than 0.2V at all times |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.