DTC Advanced Diagnostics: U0155 (V6) - Honda Accord CR/CT 2012-2017

DTC Advanced Diagnostics: U0155

DTC U0155:F-CAN Malfunction (Powertrain Control Module (PCM)-Gauge Control Module) (Engine Type: J35Y1, J35Y2)

General Description

The controller area network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (F-CAN_H and F-CAN_L). When the information is not sent from the gauge control module via the F-CAN lines and this condition continues for a specified time or when the information sent from the gauge control module is abnormal and this condition continues for a specified cycle, the powertrain control module (PCM) detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status

Execution	Continuous
Sequence	None
Duration	1 second or more
DTC Type	One drive cycle, MIL on
OBD Status	PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions

Condition	Minimum	Maximum
Elapsed time after the engine start/stop button is pressed to select the ON mode	3 seconds	–
Battery voltage [BATTERY]	10.0 V	–
No active DTCs set (prevents monitor from running)	U0029

[ ]: HDS Parameter

Malfunction Threshold

One of these conditions is met:

	The PCM does not receive any signals via the F-CAN lines for at least 1 second.
	The information sent from the gauge control module is abnormal at least 20 times.

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

	Gauge control module failure (include fuse blown)
	F-CAN circuit F-CAN_H line open
	F-CAN circuit F-CAN_L line open
	F-CAN circuit F-CAN_H line short to ground
	F-CAN circuit F-CAN_L line short to ground
	PCM internal circuit failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.