Hint:
Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

How to proceed with troubleshooting
Terminals of ecuGlossary of sae and toyota terms
This glossary lists all sae-j1930 terms and abbreviations
used in this manual in compliance with sae
recommendations, as well as their toyota equivalents.
...
Torque converter and drive plate
Inspection
Inspect torque converter clutch assembly
Inspect the one-way clutch.
Install sst to the inner race of the one-way
clutch.
Sst 09350-32014 (09351-32010)
Set sst so that it fits in the notch of the
converter hub and in the outer race of the oneway
clutch.
...
Parts location
System diagram
System description
Cruise control system
This system is controlled by the ecm, and is activated by
the throttle position sensor and motor. The ecm controls
the following functions: on-off, set / coast,
resume / accel, cancel, vehicle speed operation,
motor ...