Toyota Camry Manual page 1964

INSPECTION PROCEDURE
1 Check transponder key coil (See page BE–128).
OK
2 Check harness and connector between transponder key amplifier and ECM.
OK
3 Does it operate normally after replacement of transponder key amplifier?
No
Replace ECM.
DIAGNOSTICS – ENGINE IMMOBILISER SYSTEM
NG Replace transponder key coil
NG Repair or replace harness and connector
Yes Replace transponder key amplifier.
Author : Date :
DI–937
1172