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.
2011 Ford Mustang Base, 2D Convertible, AutomaticFACTORY OEM SERVICE PROCEDURE
HVAC Module
HVAC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action to Take |
|---|---|---|
| B1030:11 | Left Front Seat Heater: Circuit Short to Ground | REFER to SEAT SYSTEM article. |
| B1030:12 | Left Front Seat Heater: Circuit Short to Battery | REFER to SEAT SYSTEM article. |
| B1030:13 | Left Front Seat Heater: Circuit Open | REFER to SEAT SYSTEM article. |
| B1032:11 | Right Front Seat Heater: Circuit Short to Ground | REFER to SEAT SYSTEM article. |
| B1032:12 | Right Front Seat Heater: Circuit Short to Battery | REFER to SEAT SYSTEM article. |
| B1032:13 | Right Front Seat Heater: Circuit Open | REFER to SEAT SYSTEM article. |
| B1081:00 | Left Temperature Damper Motor: No Sub Type Information | GO to PINPOINT TEST P . |
| B1081:11 | Left Temperature Damper Motor: Circuit Short to Ground | GO to PINPOINT TEST P . |
| B1081:12 | Left Temperature Damper Motor: Circuit Short to Battery | GO to PINPOINT TEST P . |
| B1082:00 | Right Temperature Damper Motor: No Sub Type Information | GO to PINPOINT TEST P . |
| B1082:11 | Right Temperature Damper Motor: Circuit Short to Ground | GO to PINPOINT TEST P . |
| B1082:12 | Right Temperature Damper Motor: Circuit Short to Battery | GO to PINPOINT TEST P . |
| B1083:00 | Recirculation Damper Motor: No Sub Type Information | GO to PINPOINT TEST J . |
| B1083:11 | Recirculation Damper Motor: Circuit Short to Ground | GO to PINPOINT TEST J . |
| B1083:12 | Recirculation Damper Motor: Circuit Short to Battery | GO to PINPOINT TEST J . |
| B1086:00 | Air Distribution Damper Motor: No Sub Type Information | GO to PINPOINT TEST K . |
| B1086:11 | Air Distribution Damper Motor: Circuit Short to Ground | GO to PINPOINT TEST K . |
| B1086:12 | Air Distribution Damper Motor: Circuit Short to Battery | GO to PINPOINT TEST K . |
| B10AF:11 | Blower Fan Relay: Circuit Short to Ground | GO to PINPOINT TEST R . |
| B10AF:12 | Blower Fan Relay: Circuit Short to Battery | GO to PINPOINT TEST Q . |
| B10AF:13 | Blower Fan Relay: Circuit Open | GO to PINPOINT TEST Q . |
| B10B9:12 | Blower Control: Circuit Short to Battery | GO to PINPOINT TEST R . |
| B10B9:14 | Blower Control: Circuit Short to Ground or Open | GO to PINPOINT TEST Q . |
| B11E5:11 | Left HVAC Damper Position Sensor: Circuit Short to Ground | GO to PINPOINT TEST P . |
| B11E5:15 | Left HVAC Damper Position Sensor: Circuit Short to Battery or Open | GO to PINPOINT TEST P . |
| B11E6:11 | Right HVAC Damper Position Sensor: Circuit Short to Ground | GO to PINPOINT TEST P . |
| B11E6:15 | Right HVAC Damper Position Sensor: Circuit Short to Battery or Open | GO to PINPOINT TEST P . |
| B11E7:11 | Air Distribution Damper Position Sensor: Circuit Short to Ground | GO to PINPOINT TEST K . |
| B11E7:15 | Air Distribution Damper Position Sensor: Circuit Short to Battery or Open | GO to PINPOINT TEST K . |
| B125B:10 | Air Distribution Damper "B" Motor: No Sub Type Information | GO to PINPOINT TEST K . |
| B125B:11 | Air Distribution Damper "B" Motor: Circuit Short to Ground | GO to PINPOINT TEST K . |
| B125B:12 | Air Distribution Damper "B" Motor: Circuit Short to Battery | GO to PINPOINT TEST K . |
| B1A61:11 | Cabin Temperature Sensor: Circuit Short to Ground | GO to PINPOINT TEST D . |
| B1A61:15 | Cabin Temperature Sensor: Circuit Short to Battery or Open | GO to PINPOINT TEST D . |
| B1A63:11 | Right Solar Sensor: Circuit Short to Ground | GO to PINPOINT TEST F . |
| B1A63:15 | Right Solar Sensor: Circuit Short to Battery or Open | GO to PINPOINT TEST F . |
| B1A64:11 | Left Solar Sensor: Circuit Short to Ground | GO to PINPOINT TEST F . |
| B1A64:15 | Left Solar Sensor: Circuit Short to Battery or Open | GO to PINPOINT TEST F . |
| B1A68:11 | Ambient Temperature Sensor: Circuit Short to Ground | GO to PINPOINT TEST E . |
| B1A68:15 | Ambient Temperature Sensor: Circuit Short to Battery or Open | GO to PINPOINT TEST E . |
| B1B71:11 | Evaporator Temperature Sensor: Circuit Short to Ground | GO to PINPOINT TEST G . |
| B1B71:15 | Evaporator Temperature Sensor: Circuit Short to Battery or Open | GO to PINPOINT TEST G . |
| B1C83:11 | Rear Defog Relay: Circuit Short to Ground | REFER to WINDOWS & GLASS - GLASS, FRAMES & MECHANISMS article. |
| B1C83:12 | Rear Defog Relay: Circuit Short to Battery | REFER to WINDOWS & GLASS - GLASS, FRAMES & MECHANISMS article. |
| B1C83:13 | Rear Defog Relay: Circuit Open | REFER to WINDOWS & GLASS - GLASS, FRAMES & MECHANISMS article. |
| C1B14:11 | Sensor Supply Voltage A: Circuit Short to Ground | GO to PINPOINT TEST C . |
| C1B14:12 | Sensor Supply Voltage A: Circuit Short to Battery | GO to PINPOINT TEST C . |
| U0140:87 | Lost Communication With Body Control Module: Missing Message | This DTC can set because the Smart Junction Box (SJB) is unable to communicate with the HVAC module over the Controller Area Network (CAN) bus. CARRY OUT a self-test of the SJB . If the scan tool indicates that the SJB is not responding, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the network communication concern. If SJB DTCs are present, REFER to MULTIFUNCTION ELECTRONIC MODULE article. |
| U0155:87 | Lost Communication With Instrument Panel Cluster (IPC) Module: Missing Message | This DTC can set because the IPC is unable to communicate with the HVAC module over the Controller Area Network (CAN) bus. CARRY OUT a self-test of the IPC . If the scan tool indicates that the IPC is not responding, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the network communication concern. If IPC DTCs are present, REFER to MULTIFUNCTION ELECTRONIC MODULE article. |
| U0163:87 | Lost Communication With Navigation Control Module: Missing Message | This DTC can set because the Audio Control Module (ACM) is unable to communicate with the HVAC module over the Controller Area Network (CAN) bus. CARRY OUT a self-test of the ACM . If the scan tool indicates that the ACM is not responding, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the network communication concern. If ACM DTCs are present, REFER to MULTIFUNCTION ELECTRONIC MODULE article. |
| U0256:87 | Lost Communication With Front Controls Interface Module (FCIM) "A": Missing Message | This DTC can set because the FCIM is unable to communicate with the HVAC module over the Controller Area Network (CAN) bus. CARRY OUT a self-test of the FCIM . If the scan tool indicates that the FCIM is not responding, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the network communication concern. If FCIM DTCs are present, REFER to MULTIFUNCTION ELECTRONIC MODULE article. |
| U0422:68 | Invalid Data Received From Body Control Module: Event Information | This DTC can set due to a fault in the Smart Junction Box (SJB). CARRY OUT a self-test of the SJB . If the scan tool indicates that the SJB is not responding, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the network communication concern. If SJB DTCs are present, REFER to MULTIFUNCTION ELECTRONIC MODULE article. |
| U0423:68 | Invalid Data Received From Instrument Panel Cluster Control Module: Event Information | This DTC can set because the Instrument Panel Cluster (IPC). CARRY OUT a self-test of the IPC . If the scan tool indicates that the IPC is not responding, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the network communication concern. If IPC DTCs are present, REFER to MULTIFUNCTION ELECTRONIC MODULE article. |
| U0464:68 | Invalid Data Received From Navigation Control Module: Event Information | This DTC can set due to a fault in the Audio Control Module (ACM). CARRY OUT a self-test of the ACM . If the scan tool indicates that the ACM is not responding, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the network communication concern. If ACM DTCs are present, REFER to DRIVER INFORMATION SYSTEM & ENTERTAINMENT SYSTEM article to diagnose the ACM fault. |
| U0557:68 | Invalid Data Received From Front Controls Interface Module (FCIM) "A": Event Information | This DTC can set due to a fault in the FCIM . CARRY OUT a self-test of the FCIM . If the scan tool indicates that the FCIM is not responding, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the network communication concern. If FCIM DTCs are present, REFER to DRIVER INFORMATION SYSTEM & ENTERTAINMENT SYSTEM article to diagnose the FCIM fault. |
| U3000:41 | Control Module: General Checksum Failure | INSTALL a new HVAC module. REFER to HVAC - CLIMATE CONTROL article. |
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | GO to PINPOINT TEST H . |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | GO to PINPOINT TEST H . |
| All Other DTCs | - | REFER to the Master DTC Chart in MULTIFUNCTION ELECTRONIC MODULE article. |
Factory Service Tools
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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.
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