Hint:
Past problems that seem unrelated may also help in some cases.

Operation flow
Symptom confirmation and diagnostic trouble codeStarting system
Parts location
System diagram
The starting system rotates the starter motor according to the
signals from the ignition switch and pnp switch.
...
Fail-safe chart
Fail-safe chart
This function minimizes the loss of the ect functions
when a malfunction occurs in a sensor or solenoid.
Automatic transmission fluid (atf) temperature
sensor:
when the atf temperature sensor has a
malfunction, o/d up-shift is prohibited
Counter gear speed sensor n ...
Installation
Install water pump assembly
Remove any old seal packing material from the
contact surface.
Apply a continuous line of seal packing as shown in
the illustration.
Seal packing:
toyota genuine seal parking black, three
bond 1207b or equivalent
Standard seal diameter:
2.2 To 2. ...