B106E - Rear Blower Control Circuit/Performance: Notes
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2014 Volkswagen Routan, 2013 Volkswagen Routan, 2012 Volkswagen Routan, 2011 Volkswagen Routan, and 2010 Volkswagen Routan. However, it is still accessible from the selected car via links, so may be relevant.
For a complete wiring diagram, refer to the appropriate SYSTEM WIRING DIAGRAMS information.
Theory Of Operation
The Rear A/C Heater Control works in conjunction with the A/C Heater Control to control the rear blower motor, rear temperature control and rear mode control. The Rear A/C Heater Control is constantly monitored by the A/C Heater Control for proper operation. If the monitored signal circuits are out of a calibrated range a DTC will set. For further information, refer to HVAC .
- When Monitored: With the ignition on.
- Set Condition: If the A/C Heater Control detects a short to ground on the Rear Blower Signal circuit. If a valid voltage is detected for one second the DTC will change from active to stored and stay in the controllers memory for 100 consecutive ignition cycles.
| Possible Causes |
|---|
| REAR A/C HEATER CONTROL DISCONNECTED |
| REAR BLOWER SIGNAL CIRCUIT SHORTED TO GROUND |
| REAR BLOWER SIGNAL CIRCUIT OPEN |
| 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND |
| 5-VOLT SUPPLY CIRCUIT OPEN |
| REAR A/C HEATER CONTROL |
| A/C HEATER CONTROL |
Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC .