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HVAC Control Module Diagnostic Flash Codes

Code Description Action
0201 Batter Voltage Low (less than 8V) GO to Pinpoint Test F
0202 Batter Voltage High (greater than 16V) GO to Pinpoint Test F
0300 Compressor Fail. The HVAC system has detected that the compressor is not operating when requested to do so. GO to Pinpoint Test G
0320 Compressor Warning. Ignore if Outside Air Temperature is less than 1°C (33.8°F). If code is active most of the time, check for low refrigerant. GO to Pinpoint Test G
0400 (IAF) Impact Affected Features, System Waiting for Reset. Code 0400 becomes active when the HVAC control module is notified of an impact event on the CAN and permanently cuts power to the Blower until reset conditions are met. DIAGNOSE the HVAC control module loss of communication. REFER to: Communications Network .
1001 Control Head Disconnected GO to Pinpoint Test H
1002 Control 1 Disconnect: Blower Control Signal Disconnected or Shorted to Power GO to Pinpoint Test H
1003 Control 1 Short: Blower Control Signal Shorted to Ground GO to Pinpoint Test H
1004 Control 1 Calibration Fail: Blower Control Calibration Failed. This code is activated directly after Control Head Calibration procedure, typically when procedure is run without moving Blower control knob. Code 1004 will clear only after successful calibration. GO to Pinpoint Test H
1010 Control 2 Disconnect: Mode Control Signal Disconnected or Shorted to Power GO to Pinpoint Test H
1011 Control 2 Short: Mode Control Signal Shorted to Ground GO to Pinpoint Test H
1012 Control 2 Calibration Fail: Mode Control Calibration Failed GO to Pinpoint Test H
1013 Control 3 Disconnect: Temp Control Signal Disconnected or Shorted to Power GO to Pinpoint Test H
1014 Control 3 Short: Temp Control Signal Shorted to Ground GO to Pinpoint Test H
1020 Control 3 Calibration Fail: Temp Control Calibration Failed GO to Pinpoint Test H
1024 Tact 1 Disconnect: Tact Signal Disconnected or shorted to Power: The TACT1 signal is the analog signal from the Control Head affected by the tactile switches for Auto, Recirc, and AC GO to Pinpoint Test H
1030 Tact 1 Short: Tact Signal Shorted to Ground: The TACT1 signal is the analog signal from the Control Head affected by the tactile switches for Auto, Recirc, and AC. GO to Pinpoint Test H
2000 Osek NM Limp home Mode: Canbus connection to module is compromised DIAGNOSE the HVAC control module loss of communication. REFER to: Communications Network .
3000 Dash/Floor Door Out of Range Hi: Broken Door Shaft or Stripped actuator gear GO to Pinpoint Test I
3001 Defrost Door Out of Range Hi: Broken Door Shaft or Stripped actuator gear GO to Pinpoint Test I
3002 Blend Door Out of Range Hi: Broken Door Shaft or Stripped actuator gear GO to Pinpoint Test I
3003 Fresh Air Door Out of Range Hi: Broken Door Shaft or Stripped actuator gear GO to Pinpoint Test J
3004 Dash/Floor Door Out of Range Lo: Door binding or obstruction GO to Pinpoint Test I
3010 Defrost Door Out of Range Lo: Door binding or obstruction GO to Pinpoint Test I
3011 Blend Door Out of Range Lo: Door binding or obstruction. Also when Defrost and Blend Actuator connectors are swapped GO to Pinpoint Test I
3012 Fresh Air Door Out of Range Lo: Door binding or obstruction GO to Pinpoint Test J
3013 Dash/Floor Actuator Stall: Door binding or obstruction GO to Pinpoint Test I
3014 Defrost Actuator Stall: Door binding or obstruction GO to Pinpoint Test I
3020 Blend Actuator Stall: Door binding or obstruction GO to Pinpoint Test I
3021 Fresh Air Actuator Stall: Door binding or obstruction GO to Pinpoint Test J
3022 Dash/Floor Internal Sai Actuator Error: Internal Actuator Error: Thermal, Electrical, Communication, power fail GO to Pinpoint Test I
3023 Defrost Internal Sai Actuator Error: Internal Actuator Error: Thermal, Electrical, Communication, power fail GO to Pinpoint Test I
3024 Blend Internal Sai Actuator Error: Internal Actuator Error: Thermal, Electrical, Communication, power fail GO to Pinpoint Test I
3030 Fresh Air Internal Sai Actuator Error: Internal Actuator Error: Thermal, Electrical, Communication, power fail GO to Pinpoint Test J
3031 Fresh Air Actuator Disconnected: Fresh Air Actuator is disconnected or broken connection in Vehicle harness GO to Pinpoint Test J
3032 Blend Actuator Disconnected: Blend Actuator is disconnected or broken connection in actuator harness between Defrost and Blend actuators GO to Pinpoint Test I
3033 Defrost Actuator Disconnected: Defrost Actuator is disconnected or broken connection in actuator harness between Dash/Floor and Defrost actuators GO to Pinpoint Test I
3034 Dash/Floor Actuator Disconnected: Actuator harness not connected to Hvac ECU or broken connection in actuator harness between ECU and Dash/Floor actuator GO to Pinpoint Test I
4000 Evap Sensor Disconnected GO to Pinpoint Test K
4001 Evap Sensor Out of Range GO to Pinpoint Test K
4020 Cabin Air Temp Sensor Out of Range GO to Pinpoint Test L
4021 Cabin Air Temp Sensor Disconnected GO to Pinpoint Test L
4024 Driver Side Vent Temp Sensor Out of Range GO to Pinpoint Test P
4030 Driver Side Vent Temp Sensor Disconnected GO to Pinpoint Test P
4033 Driver Side Sunload Channel Disconnected: Broken wire connection in vehicle harness. Faulty Sensor GO to Pinpoint Test Q
4034 Passenger Side Sunload Channel Disconnected: Broken wire connection in vehicle harness. Faulty Sensor GO to Pinpoint Test Q
4040 Sunload Sensor Module Disconnected GO to Pinpoint Test Q
4041 Driver Side Sunload Channel Out of Range GO to Pinpoint Test Q
4042 Passenger Side Sunload Channel Out of Range GO to Pinpoint Test Q