DTC U1600 (Motor Control Module)

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

DTC U1600: F-CAN Malfunction (Traction Motor Control Module - PCM)

General Description

Courtesy of HONDA, U.S.A., INC.

The controller area network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (H line and L line). When the motor control module does not receive the signals from the powertrain control module (PCM) via the F-CAN lines or the received data is abnormal for a specified time, a malfunction is detected and a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	2 seconds or more
DTC Type	Two drive cycles, MIL on, POWER SYSTEM indicator on

Enable Conditions

Condition	Minimum	Maximum
Elapsed time after the vehicle condition is turned to the ON mode	5 seconds	-
12 volt battery voltage	10 V	-

Malfunction Threshold

One of these conditions is met for at least 2 seconds:

The motor control module does not receive any signals via the F-CAN lines.
The information sent from the PCM is abnormal.

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.

F-CAN circuit F-CAN A_H line open
F-CAN circuit F-CAN A_L line open
F-CAN circuit F-CAN A_H line short to ground
F-CAN circuit F-CAN A_L line short to ground
F-CAN circuit F-CAN D_H line open
F-CAN circuit F-CAN D_L line open
F-CAN circuit F-CAN D_H line short to ground
F-CAN circuit F-CAN D_L line short to ground
Unit communicating on F-CAN internal circuit failure
PCM failure
PCU internal failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the motor control module memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

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.