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.
HVAC Control Module X1
2006 Isuzu Ascender S, 5.3 M, 4WDSECTION HVAC Control Module X1
WARNING: This page is about a different car, the 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
HVAC Control Module X1
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| A1 | 0.35 D-GN | 1614 | Recirculation Door Control |
| A2 | 0.35 D-BU | 1646 | Right Air Temperature Door Position Signal |
| A3 | 0.35 L-BU | 733 | Left Air Temperature Door Position Signal |
| A4 | 0.35 L-GN/BK | 2276 | Defrost Door Position Signal |
| A5 | 0.35 L-GN | 2275 | Mode Door Position Signal |
| A6 | - | - | Not Used |
| A7 | 0.35 BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| A8 | 0.35 BK/WH | 751 | Ground |
| A9 | - | - | Not Used |
| A10 | 0.35 YE | 2277 | Auxiliary HVAC Enable Control (CJ3) |
| A11 | 1 D-GN | 71 | OFF Blower Motor Control |
| A12 | 0.35 D-BU | 204 | A/C Low Pressure Sensor Signal |
| B1 | 0.35 WH/BK | 1236 | Right Air Temperature Door Control |
| B2 | 0.35 D-BU | 1199 | Left Air Temperature Door Control |
| B3 | 0.35 TN/BK | 2274 | Defrost Door Control |
| B4 | 0.35 TN | 2273 | Mode Door Control |
| B5 | 0.35 BN | 341 | Ignition 3 Voltage |
| B6 | 0.35 YE | 1791 | Low Reference |
| B7 | 0.35 OG | 4340 | Battery Positive Voltage |
| B8 | 0.35 L-BU/BK | 1688 | 5-Volt Reference |
| B9 | 0.35 BK | 2250 | Ground |
| B10 | - | - | Not Used |
| B11 | 0.35WH | 1038 | Class 2 Serial Data |
| B12 | 0.35 L-GN | 2278 | A/C Compressor Status Signal |
Connector Part Information
|
Terminal Part Information
|
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.