Operation CHARM: Car repair manuals for everyone.
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Unstable Engine Speed




Unstable engine speed

Intermediate housing assembly worn or damaged

Pulley pressure feed pipe damaged or out of round

Forward clutch assembly defective

Reverse brake defective

Reverse brake piston stuck, worn or damaged

Start clutch assembly defective

Start clutch end-plate clearance incorrect

Start clutch feed pipe damaged or out of round

CVTF pump worn, binding, or foreign material in CVTF pump

Low CVTF level

CVTF strainer or CVTF filter clogged

CVTF deteriorated

Lower valve body assembly defective

CVT driven pulley pressure control solenoid valve defective

CVT drive pulley pressure control solenoid valve defective

CVT clutch pressure control solenoid valve defective

Manual valve body assembly defective

Manual valve lines worn or damaged

Solenoid valves defective

Solenoid wire harness worn or damaged

CVT input shaft (drive pulley)and CVT output shaft (driven pulley) speed sensors defective

Vehicle speed sensor defective

PCM defective

Start clutch control system not calibrated in PCM

Engine output low

IMA motor defective

Notes

Check the CVTF level CVT Fluid Level Check and condition, and check the CVTF cooler lines for leakage and loose connections. If necessary, replace the CVTF CVT Fluid Replacement, use genuine Honda CVTF.

Notes

Check for a stored DTC, and check for loose connectors.

Notes

Check the speed sensors installation, for wear and damage, and measure their resistance, and also check the O-rings for wear and damage.

Notes

Check the stall speed Stall Speed Test.

Notes

Calibrate the start clutch control system Testing and Inspection, and check the start clutch Testing and Inspection.

Notes

Check the drive and driven pulley pressure, the lubrication pressure, the forward clutch pressure, and the reverse brake pressure CVT Pressure Test. If the pressure is low or there is no pressure, check the CVTF pump assembly, the CVTF pump drive chain, the CVTF pump drive/driven sprocket, and the CVTF feed pipes.

Notes

Inspect the clearance between the forward clutch end-plate and the top disc CVT Forward Clutch Clearance Inspection. If the clearance is out of tolerance, replace the forward clutch assembly.

Notes

Inspect the reverse brake piston and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the brake end-plate and the top disc. If the clearance is out of tolerance, inspect the brake discs and plates for wear and damage. If the discs and plates are worn or damaged, replace them as a set. If they are OK, adjust the clearance with the brake end-plate.

Notes

Check the CVTF strainer and the CVTF filter for debris. If the CVTF strainer or the CVTF filter is clogged, find the damaged components that caused debris, and clean the CVTF cooler lines CVTF Cooler Cleaning if necessary.

Notes

Inspect the solenoid wire harness for open and short.

Notes

Check the lower valve body assembly for scoring and damage.

Notes

Check the manual valve body assembly for scoring and damage. If the manual valve body assembly is worn or damaged, replace it as an assembly.

Notes

Check the intermediate housing assembly for wear and damage. If the drive pulley, the driven pulley, the pulley shafts, the steel belt, or related part are worn or damaged, replace the intermediate housing assembly.