CAN Communication Signal Rationality Monitor

WARNING: This page is about a different variant/trim than selected.

OPERATION

DTC(s)	U0101: Lost communication with TCM U0121: Lost communication with ESP® control module U0155: Lost communication with IPC
Monitor execution	Continuous
Monitoring Duration	U0101, U0121: 4 sec. U0155: 2 sec.

ENABLE CONDITIONS

Parameter	Min.	Max.
U0101, U0121:
CAN bus = Active and ready Consisting of: Ignition on for > 5 sec. Engine speed > 560 RPM for 2 sec. 10 V < battery voltage < 18 V for 2 sec.
U0155:
Battery voltage	10 V	18 V
Engine start complete	560 RPM	-

TYPICAL MALFUNCTION THRESHOLDS

U0101:

Time of no message from TCM > 2 sec.

U0121:

Time of no message from ESP® control module > 2 sec.

U0155:

Time of no message from IPC > 2 sec.