Toyota AVENSIS 2000 Supplement Manual page 398

DTC B2797
CIRCUIT DESCRIPTION
This code is detected when an error occurs despite of normal communication.
(Example: Some noise is included in communication line.)
DTC No.
B2797 Communication error
WIRING DIAGRAM
Refer to DTC B2796 on page DI–265.
INSPECTION PROCEDURE
1 Check noise.
Noise
OK
2 Does it operate normally after replacement of transponder key amplifier?
No
Check and replace engine ECU
(See page IN–30).
AVENSIS/CORONA SUP (RM781E)
DIAGNOSTICS
Communication Malfunction No. 1
DTC Detection Condition
PREPARATION:
Insert already registered master key in the key cylinder.
CHECK:
Using an oscilloscope or hand–held tester, check that noise is
included in the CODE terminal of the engine ECU.
OK:
NG
I02681
Yes
– ENGINE IMMOBILISER SYSTEM
S Wire harness
S Transponder key amplifier
S Unregistered key inserted before
S Engine ECU
No noise is detected.
Try to find cause of noise and remove it.
Replace transponder key amplifier.
Trouble Area
DI–267
DI7FP–03