Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 160 (IMA SYSTEM)GENERAL TROUBLESHOOTING INFORMATIONSUBSTITUTING THE MCM
2008 Chevrolet HHR LT, 2.4 P, Automatic
Substituting the MCM
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Substituting the 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.
Special Tools Required
- Honda Diagnostic System (HDS) tablet tester
- Honda Interface Module (HIM) and an iN workstation with the latest HDS software version
- HDS pocket tester
- GNA600 and an iN workstation with the latest HDS software version
Any one of the above updating tools can be used.
Use this procedure when you have to substitute a known-good MCM during a troubleshooting procedure.
- Remove the MCM (see MOTOR CONTROL MODULE (MCM) REMOVAL/INSTALLATION ).
- Install a known-good MCM.
- Do the MOTOR ROTOR POSITION CALIBRATION in the ADJUSTMENT MENU with the HDS.
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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.