Unstable engine speed
Probable cause(s)
Drive pulley, driven pulley, pulley shaft, pulley belt, and pulley related parts worn or damaged
Transmission fluid feed pipe worn, damaged, or out of round
Forward clutch assembly defective
Reverse brake defective
Transmission fluid pump worn, binding, or foreign material in transmission fluid pump
Low transmission fluid (HCF-2) level
Transmission fluid strainer or transmission fluid filter clogged
Transmission fluid (HCF-2) deteriorated
Valve body assembly defective
CVT drive pulley pressure control solenoid valve defective
CVT driven pulley pressure control solenoid valve defective
CVT clutch pressure control solenoid valve defective
CVT lock-up clutch control solenoid valve defective
Shift solenoid valve B defective
Torque converter assembly defective
PCM defective
Notes
Check the drive pulley, the driven pulley, the pulley shafts, the steel belt, and pulley related parts for wear and damage. If there are worn or damaged, replace the transmission housing assembly.
Check the transmission fluid feed pipe for wear, damage, and out of round.
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.
Check the transmission fluid pump assembly for wear and damage. If the transmission fluid pump assembly is worn or damaged, replace it as an assembly.
Check the transmission fluid strainer and the transmission fluid filter for debris. If the transmission fluid strainer or the transmission fluid filter is clogged, find the damaged components that caused debris.
Check the valve body assembly for wear and damage.
Inspect the torque converter assembly for wear and damage.