OSCILLOSCOPE INSPECTION PROCEDURES


With the connector remain connected, connect the oscilloscope probe to each terminal of CVT-ECU.
Terminal No.
Terminal code
Check item
Check conditions
Normal conditions
Wave patterns
1
PLLS
Line pressure solenoid valve

  • Engine: Idling
  • Selector lever position: N

Accelerator pedal: Fully closed
ON pulse (activation signal) width (Long)
Wave pattern A
Accelerator pedal: Fully opened
ON pulse (activation signal) width (Short)
Wave pattern B
2
PRLS
Primary pressure solenoid valve

  • Selector lever position: Sport mode (1st gear)
  • Drive at a constant speed of approx. 20 km/h

Pulse signal displayed
Wave pattern A
3
SCLS
Secondary pressure solenoid valve

  • Selector lever position: Sport mode (1st gear)
  • Drive at a constant speed of approx. 20 km/h

Pulse signal displayed
Wave pattern A
32
TRBS
Turbine speed sensor

  • Selector lever position: Sport mode (1st gear)
  • Drive at a constant speed of approx. 20 km/h

approx. 1,350 Hz
Wave pattern C
33
PRMS
Primary pulley speed sensor

  • Selector lever position: Sport mode (1st gear)
  • Drive at a constant speed of approx. 20 km/h

approx. 1,350 Hz
Wave pattern C
34
SECS
Secondary pulley speed sensor

  • Selector lever position: Sport mode (1st gear)
  • Drive at a constant speed of approx. 20 km/h

approx. 165 Hz
Wave pattern D
41
LBLS
Select solenoid valve

  • Engine: Idling
  • When the vehicle is stationary
  • Selector lever position: N

Pulse signal displayed
Wave pattern A
52
LULS
Lock-up solenoid valve

  • Selector lever position: D
  • Accelerator pedal opening angle: 12.5% or less
  • Drive at a constant speed of approx. 20 km/h

ON pulse (activation signal) width (Long)
Wave pattern E

  • Engine: Idling
  • When the vehicle is stationary

ON pulse (activation signal) width (Short)
Wave pattern F

WAVE PATTERN SAMPLE


Wave pattern A
Wave pattern B
Wave pattern C






Wave pattern D
Wave pattern E
Wave pattern F