Code 80/90, Transaxle Component Slipping: Notes

PCM monitors difference between engine speed and transaxle input shaft speed. With selector in D3 or D4 (indicated gear 3 or 4), and TCC is locked, scan should display engine speed closely matching input speed.

NOTE: Test numbers refer to numbers on diagnostic chart.

Checks continuity of internal transaxle harness and apply solenoid.
Checks for open in power supply to transaxle.
Checks PWM return circuitry to PCM.