2001 TOYOTA AVALON Service Repair Manual

I13607
Transponder
Key Amplifier
Transponder
Key Coil
1 2
ANT1 ANT2
T6
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI-613
769 Author
: Date
:
2001 AVALON (RM808U)
Transponder key coil circuit
CIRCUIT DESCRIPTION
DTC No.Detection ItemTrouble Area
B2798/99Communication error

Key

Transponder Key Coil

Transponder Key Amplifier

Wire harness

ECM
WIRING DIAGRAM
DI6LE-01

DI-614
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
770 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check transponder key coil (See page BE-181).
NG Replace transponder key coil.
OK
2 Check harness and connector between transponder key amplifier and ECM.
NG Repair of replace harness and connector.
OK
3 Does the system operate normally after replacement of transponder key amplifi-
er?
Yes Replace transponder key amplifier.
No
Replace ECM.

I13606
Transponder Key
Amplifier L-O
W-B+B
GND 1
5 21
3 52B4
B-W
W-B
BatteryEFI Relay
J6
J/C
W-B B2F2
IF16
2G2 2F4
F71
F6 1
B
EDFL MAIN B
4F8
4D8
II BW-BB-W EFI NO. 2 EFI NO. 1
FL Block
T6 Engine Room J/B
J/B No. 4
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI-61 1
767 Author
: Date
:
2001 AVALON (RM808U)
Power source circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the Transponder Key ECU
WIRING DIAGRAM
DI6LD-01

DI-612
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
768 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check EFI fuse.
CHECK:
Check continuity of EFI fuse.
OK:
Continuity
NG Replace the failure fuse.
OK
2 Check voltage between terminals EFI and GND of Transponder Key ECU connec-
tor.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the Transponder Key ECU connector.
CHECK:
Measure voltage between terminals +B and GND.
OK:
Voltage: 10 - 14 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI-604).
NG
3 Check wireharness and connector between Transponder Key ECU and body
ground.
NG Repair or replace wireharness or connector.
OK
Check and repair wirehareness and connec-
tor between Transponder Key ECU and Bat-
tery.

DI1AK-12
ENGINE IMMOBLISER Check SheetInspector 's
Name:
Customer 's Name
Date Vehicle
Brought InRegistration YearRegistration No.
Frame No.
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs/ /
ContinuousIntermittent ( times a day)
DTC Check1st Time
2nd TimeNormal Code
Malfunction Code (Code )
Normal CodeMalfunction Code (Code )
Symptomskm
miles
Engine does not start.
Check ItemMalfunction
Indicator LampNormal
Remains ON Does not Light Up
Immobiliser is not set.
(Engine starts with key codes other than the registered key code.)
DI-598
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
754 Author
: Date
:
2001 AVALON (RM808U)
CUSTOMER PROBLEM ANALYSIS CHECK

DI1AM-17
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI-601
757 Author
: Date
:
2001 AVALON (RM808U)
DIAGNOSTIC TROUBLE CODE CHART
DTC No.
(See Page)Detection ItemTrouble Area
B2795
(DI-605)Unmatched key code
Key

Unregistered key inserted before
B2796
(DI-606)No communication in immobiliser system

Key

Transponder key coil

Amplifier

Wirehaness

ECM
B2797
(DI-609)Communication malfunction
Communication contents

Unregistered key inserted before
HINT:
To reduce the unnecessary exchange of ECM, check that a trouble occurs with the original ECM at the time
of excanging ECM and the trouble will disappear with a new ECM.

DI1AJ-18
Vehicle Brought to Workshop
Customer Problem Analysis
Check and Clear DTC (Pre check)Items inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
Problem Symptom ConfirmationSymptom Simulation
Symptom
does not occur
Symptom
occurs
DTC Check
Circuit Inspection and Part Inspection
DTC ChartMalfunction codeProblem Symptoms Table
Identification of Problem
Normal code
Repair
Confirmation Test
End
1
2
3
4
5
67
8
9
10
Step 2, 5 :Diagnostic steps permitting the use of the
hand-held tester or break-out-box.
P. DI-598
P. DI-599
P. IN-20
P. DI-604
P. DI-601
P. DI-605 - DI-613 P. DI-601
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI-597
753 Author
: Date
:
2001 AVALON (RM808U)
ENGINE IMMOBILISER SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following pages.

DI1AN-06
I12540
Engine Room Junction Block

EFI Fuse
Instrument Panel Junction Block

IGN FuseECMIgnition Switch Assembly

Transponder Key Amplifier

Transponder Key Coil

Key Unlock Warning Switch
Security Indicator
DI-602
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
758 Author
: Date
:
2001 AVALON (RM808U)
PARTS LOCATION