23A-INSPECTION PROCEDURES BY USING OSCILLOSCOPE

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OSCILLOSCOPE INSPECTION PROCEDURES

With the connector remain connected, connect the oscilloscope probe to each terminal of TCM.

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
1	PLLS	Line pressure solenoid valve	Engine: Idling Selector lever position: N	Accelerator pedal: Fully opened	ON pulse (activation signal) width (Short)	Wave pattern B
2	PRLS	Primary pressure solenoid valve	Selector lever position: L Drive at a constant speed of approx. 20 km/h (13 mph)		Pulse signal displayed	Wave pattern A
3	SCLS	Secondary pressure solenoid valve	Selector lever position: L Drive at a constant speed of approx. 20 km/h (13 mph)		Pulse signal displayed	Wave pattern A
32	TRBS	Turbine speed sensor	Selector lever position: L Drive at a constant speed of approx. 20 km/h (13 mph)		approx. 1,350 Hz	Wave pattern C
33	PRMS	Primary pulley speed sensor	Selector lever position: L Drive at a constant speed of approx. 20 km/h (13 mph)		approx. 1,350 Hz	Wave pattern C
34	SECS	Secondary pulley speed sensor	Selector lever position: L Drive at a constant speed of approx. 20 km/h (13 mph)		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 (13 mph)		ON pulse (activation signal) width (Long)	Wave pattern E
52	LULS	Lock-up solenoid valve	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