Electrical Components Inspection

INSPECTION OF A/T CONTROL UNIT




- Measure voltage between each terminal and terminal (15) or (48) by following "A/T CONTROL UNIT INSPECTION TABLE".




- Pin connector terminal layout

A/T Control Unit Inspection Table (Data Reference Values) Terminal No. 1 - 4:

A/T Control Unit Inspection Table (Data Reference Values) Terminal No. 5 - 18:

A/T Control Unit Inspection Table (Data Reference Values) Terminal No. 19 - 32:

A/T Control Unit Inspection Table (Data Reference Values) Terminal No. 33 - 48:

A/T CONTROL UNIT INSPECTION TABLE (Data are reference values.)

SOLENOID VALVES AND FLUID TEMPERATURE SENSOR




- For removal and installation, refer to "ON-VEHICLE SERVICE". On Vehicle Service

Solenoid valves
Resistance check




- Check resistance between two terminals.

Operation Check




- Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground (bracket).

Fluid temperature sensor







Check resistance between terminals (33) and (35) while changing temperature as shown at left.

OVERDRIVE SWITCH







- Check continuity between two terminals.

INHIBITOR SWITCH







1. Check continuity between terminals (1) and (2) and between terminals (3), (4), (5), (6), (7), (8), (9) while moving selector lever through each range.




2. If NG, check again with control cable disconnected from manual shaft of A/T assembly. - Refer to step 1.
3. If OK on step 2, adjust control cable. - Refer to "ON-VEHICLE SERVICE". On Vehicle Service




4. If NG on step 2, remove inhibitor switch from A/T and check continuity of inhibitor switch terminals. - Refer to step 1.
5. If OK on step 4, adjust inhibitor switch. - Refer to "ON- VEHICLE SERVICE". Inhibitor Switch Adjustment
6. If NG on step 4, replace inhibitor switch.

REVOLUTION SENSOR




- For removal and installation, refer to "ON-VEHICLE SERVICE", AT-126.




- Check resistance between terminals 01, 02 and 03.

DROPPING RESISTOR




- Check resistance between two terminals.

Resistance: 11.2 - 12.8 Ohms

THROTTLE POSITION SWITCH
Closed throttle position switch (idle position)







- Check continuity between terminals (1) and (2).

Wide open throttle position switch







- Check continuity between terminals (2) and (3).