A/T System

DTC U0155 (107) Advanced Diagnostics

DTC U0155:

F-CAN Malfunction (Powertrain Control Module (PCM) -Gauge Control Module)
(A/T System)





General Description

The controller area network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (CANH and CANL). 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





Enable Conditions





Malfunction Threshold

One of these conditions must be 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.

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the D indicator blinks, and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory. The MIL does not come on.

Conditions for clearing the DTC

The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.