IMA-CAN Malfunction


Table of contents

U1204 ACURA Possible Causes

  • Faulty Powertrain Control Module (PCM)
  • Powertrain Control Module harness is open or shorted
  • Powertrain Control Module circuit poor electrical connection
  • Faulty Battery Condition Monitor (BCM) Module)
  • Faulty Motor Control Module (MCM)

How do I fix code U1204 ACURA?

  Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.

Tech Notes

  • DTC U1204 (55): IMA-CAN Malfunction (Powertrain Control Module (PCM)- Battery Condition Monitor (BCM) Module)
  • DTC U1204 (95): IMA-CAN Malfunction (Powertrain Control Module (PCM)- Motor Control Module (MCM))
  • DTC U1204 (55): IMA-CAN Malfunction (PCM-BCM Module)
  • DTC U1204 (95): IMA-CAN Malfunction (PCM-MCM)

Cost of diagnosing the U1204 ACURA code

  The cost of diagnosing the U1204 ACURA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

U1204 ACURA Description

  The Integrated Motor Assist (IMA) – Controller Area Network (CAN) uses two signal lines, IMACANH and IMACANL, and it receives and transmits multiple signals simultaneously to/from multiple control modules.
When the information is not sent from the Powertrain Control Module (PCM) through the IMA-CAN and this condition continues for a specified time or when the information sent from the PCM is abnormal and this condition continues for a specified cycle, the Battery Condition Monitor (BCM) module detects a malfunction and when BUS-OFF is not detected after the time to detect BUS-OFF has passed, a DTC is stored.

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