Notice:
Make sure that the o-ring is not cracked or jammed when installing it.

Removal
Camshaft timing oil control valve assemblyTerminals of ecu
Check occupant classification ecu
Measure the voltage of the connector.
...
Checking and replacing
fuses
If any of the electrical components do not operate, a fuse may
have blown. If this happens, check and replace the fuses as necessary.
Vehicles without a smart key system:
turn the engine switch to the “lock” position.
Vehicles with a smart key system:
turn the engine switch off.
Aft ...
Checking the coolant
The coolant level is satisfactory
if it is between the "FULL" and
"LOW" lines on the reservoir
when the engine is cold.
Reservoir cap
"FULL" line
"LOW" line
If the level is on or below the "LOW" line, add coolant up to the "FULL"
line.
■Coolant selection
Only use "Toyota Super Long Life
Cool ...