Advanced Diagnostics

Advanced Diagnostics - DTC P16D8: Powertrain Control Module (PCM) Internal IMA-CAN Communication Circuit Malfunction






General Description
The integrated motor assist-controller area network (IMA-CAN) uses two signal lines, IMACANH and IMACANL, and it receives and transmits multiple signals simultaneously to/from multiple control modules. When IMA-CAN communication between the FI CPU and the CVT CPU inside the powertrain control module (PCM) is abnormal and IMA-CAN communication is interrupted for a specified time, the PCM detects a malfunction and stores a DTC.

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






Enable Conditions






Malfunction Threshold
No signals from the FI CPU via the IMA-CAN lines are received for at least 1.5 seconds.

Driving Pattern
Turn the ignition switch to ON (II), and wait for at least 5 seconds.

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.