Initial Inspection and Diagnostic Overview

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 Part 1:

A/T Control Unit Inspection Table Part 2:

A/T Control Unit Inspection Table Part 3:

A/T Control Unit Inspection Table Part 4:

A/T CONTROL UNIT INSPECTION TABLE

INHIBITOR SWITCH




1. Disconnect control cable from manual shaft.










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




3. If N.G., adjust inhibitor switch.
4. Check terminal continuity again.
5. If N.G., replace inhibitor switch.

FLUID TEMPERATURE SENSOR







- For removal and installation, refer to "ON-VEHICLE SERVICE". On Vehicle Service
- Check resistance between two terminals while changing temperature as shown.

REVOLUTION SENSOR







- For removal and installation, refer to "ON-VEHICLE SERVICE". On Vehicle Service
- Check resistance between terminals (1), (2) and (3)

TIMING SOLENOID




- For removal and installation, refer to "ON-VEHICLE SERVICE". On Vehicle Service
- Check resistance between two terminals.
Resistance:
Timing solenoid 20 - 40 ohm

4-UNIT SOLENOID ASSEMBLY







(Shift solenoid A, B, lock-up solenoid and line pressure solenoid)
- For removal and installation, refer to "ON-VEHICLE SERVICE". On Vehicle Service
- Check resistance between terminals of each solenoid.

DROPPING RESISTOR




- Check resistance between two terminals.
Resistance: 11.2 - 12.8 ohm

OVERDRIVE SWITCH







- Check continuity between tow terminals.