Checking the kickdown solenoid valve:
Checking the kickdown speed relay:
The kickdown speed relay on the central electrics board has the task of interrupting the flow of electric power to the solenoid when the pedal is in kick-down position and an engine speed of 5900 rpm +/- 60 rpm has been reached. This interruption causes the transmission to up-shift into the next higher gear.
Accelerate the car with full throttle (no kickdown).
The up-shift, e.g. 2 -> , must occur at approx. 5500 to 5700 rpm.
Accelerate the car with the accelerator pedal in kickdown.
The 2->3 up-shift must occur at 5900 rpm now.
(*note: the speed relay in cars of Japan and USA interrupts power at 5800 rpm +/- 60 rpm)