Toyota 1 MZ–FE Manual page 594

EG2–594
INSPECTION PROCEDURE
OBDII scan tool (excluding TOYOTA hand–held tester)
Check voltage between terminal ACT of ECM and body ground
(See page EG2–593, step 3 .
Check for open and short in harness and connector between ECM
and A/C amplifier (See page IN–31).
Check and replace A/C amplifier.
1MZ–FE ENGINE – CIRCUIT INSPECTION
Check and replace ECM (See page IN–36).
Repair or replace harness or connector.