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 MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 79 (REAR DIFFERENTIAL)DIFFERENTIAL FUNCTION TEST
2002 Honda Civic Si
Differential Function Test
2002 Honda Civic SiSECTION Differential Function Test
WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Before doing the Differential Function Test, make sure these conditions are met:
- No DTCs are detected
- The engine is OFF
- The VTM-4 control unit is initialized
- Connect the HDS to the DLC.
- Turn the ignition switch ON, and confirm that the temperature of the differential oil is between 20 °C (68 °F) and 60 °C (140 °F) with the HDS.
- Turn the ignition switch OFF with the shift lever in P.
- Lift up the vehicle so all four wheel are off the ground (see LIFT AND SUPPORT POINTS ).
- Remove the rear wheels (see KNUCKLE/HUB/WHEEL BEARING REPLACEMENT ).
- Release the parking brake.
- Turn the ignition switch ON.
- Select MISCELLANEOUS TEST, then select the LEFT CLUTCH ELECTROMAGNETIC COIL TEST with the HDS, and follow the screen prompts. If the results are NORMAL, the left clutch is OK, go to step 9. If the results are ABNORMAL, replace the rear differential.
- Select MISCELLANEOUS TEST, then select the RIGHT CLUTCH ELECTROMAGNETIC COIL TEST with the HDS, and follow the screen prompts. If the results are NORMAL, the right clutch is OK. If the results are ABNORMAL, replace the rear differential.
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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.