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HOMESERVICE MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 160 (IMA SYSTEM)DTC TROUBLESHOOTINGDTC U0100 (102,103): F-CAN MALFUNCTION (POWERTRAIN CONTROL MODULE (PCM)-MOTOR CONTROL MODULE (MCM))
2008 Chevrolet HHR LT, 2.4 P, Automatic

DTC U0100 (102,103): F-CAN Malfunction (Powertrain Control Module (PCM)-Motor Control Module (MCM))

2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION DTC U0100 (102,103): F-CAN Malfunction (Powertrain Control Module (PCM)-Motor Control Module (MCM))
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • To verify this is the appropriate troubleshooting procedure, jump the SCS with the HDS and read the flash code, or change the HDS setup to show Honda codes, and read the Honda code.
  • If DTC U0100 is indicated on the HDS, intermittent failure, this system is OK at this time.
  • If the DTC cannot be cleared, do the troubleshooting for DTC U1204(55).

Check for poor connections or loose terminals at the PCM and the MCM.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.