DTC U0164-Lost Communication With HVAC Control Module: Notes

WARNING: This page is about a different car, the 2007 Mitsubishi Raider. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Communication Circuit Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

For a complete wiring diagram , refer to appropriate SYSTEM WIRING DIAGRAMS article.

When Monitored:
- With the ignition on
- Battery voltage between 10 and 16 volts
- IOD fuse installed
- FCM is configured correctly
Set Condition:
Bus messages not received from the A/C Heater Control (HVAC) for approximately 2 to 5 seconds.

Possible Causes
CAN B BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
FCM NOT CONFIGURED CORRECTLY
A/C HEATER CONTROL POWER AND GROUND
A/C HEATER CONTROL
MODULE THAT SET THIS DTC