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