DTC U0121-Lost Communication With Anti-Lock Brake System (Abs) Control Module: Notes

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 Antilock Brake Module for approximately 2 to 5 seconds.