DTC U0021: Can B Bus (+) Circuit Open: Notes

Fig 1: U0021-CAN B BUS (+) Open - Wiring Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

For a complete wiring diagram Refer to SYSTEM WIRING DIAGRAMS .

• When Monitored: 

  With the ignition on and battery voltage between 10 and 16 volts  .

• Set Condition: 

  The FCM detects the (D55) CAN B Bus (+) circuit is open  .

Possible Causes 

CAN B BUS TERMINAL PUSH OUT

SPREAD CAN B BUS TERMINAL

(D55) CAN B BUS (+) CIRCUIT OPEN

INTERNAL OPEN IN A CAN B BUS MODULE