2001 TOYOTA AVALON check engine

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.

DI6LA-01
F07887DLC3Hand-held
Tester
N09214
DLC3
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI-599
755 Author
: Date
:
2001 AVALON (RM808U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Description
ECM controls the function of immobiliser on this vehicle.
Data of the immobiliser or DTC can be read form DLC3 of
the vehicle. When a trouble occurs on immobiliser, check
engine warning light does not light up but DTC inspection
is performed.
Therefore when there seems to be a trouble on immobilis-
er, use hand-held tester or SST to check and trouble-
shoot it.
(b) Check the DLC3.
The vehicle's ECM uses ISO 14230 for communication.
The terminal arrangement of DLC3 complies with SAE
J1962 and matches the ISO 14230 format.
Terminal No.Connection / Voltage or ResistanceCondition
7Bus
Line / Pulse generationDuring transmission
4Chassis Ground e Body Ground / 1 W or lessAlways
16Battery Positive e Body Ground / 9 ~ 14 VAlways
HINT:
If your display shows ºUNABLE TO CONNECT TO VEHICLEº
when you have connected the cable of the hand-held tester to
DLC3, turned the ignition switch ON and operated the hand-
held tester, there is a problem on the vehicle side or tool side.

If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.

If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool's instruction manual.

DI-600
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
756 Author
: Date
:
2001 AVALON (RM808U)
2. INSPECT DIAGNOSIS (Normal Mode)
(a) Check the DTC using hand-held tester.
NOTICE:
Hand- held tester only: When the diagnosis system is
switched from normal mode to check mode, it erases all
DTCs and freezed frame data recorded in normal mode. So
before switching modes, always check the DTCs and
freezed frame data, and note them down.
(1) Prepare the hand-held tester.
(2) Connect the hand-held tester to DLC3.
(3) Turn the ignition switch ON and push the hand-held
tester main switch ON.
(4) Use the hand-held tester to check the DTCs and
freezed frame data, note them down. (For operating
instructions, see the hand-held tester instruction
book.)
(5) See page DI-601 to confirm the details of the DTCs.
(b) Clear the DTC.
The following operations will erase the DTCs and freeze
frame data.
(1) Operating the OBD ll scam tool (complying with
SAEJ1978) or hand-held tester to erase the codes.
(See the OBD ll scan tool's instruction book for op-
erating instructions.)
(2) Disconnecting the battery terminals or EFI fuse.

DI1AP-17
DI-604
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
760 Author
: Date
:
2001 AVALON (RM808U)
PROBLEM SYMPTOMS TABLE
SymptomSuspect AreaSee page
Immobiliser is not set.
(Engine starts with key codes other than the registered key code.)1. ECMIN-30
Engine does not start.
1. Key
2. Wire harness
3. Transponder key coil
4. Amplifier
5. ECM*1
IN-30
DI-613
IN-30
Security indicator is always ON.
1. Security indicator
2. Wire harness
3. ECM*2
IN-30
IN-30
Security indicator is always ON.
(Although code has been registered in the automatic registration
mode, indicator is not OFF.)1. Wire harness
2 Transponder key coil
3. Amplifier
4. ECMIN-30
DI-613
IN-30
Security indicator is OFF.
(When DTC of immobiliser is output)
1. Wire harness
2 Transponder key coil
3. Amplifier
4. ECMIN-30
DI-613
IN-30
Security indicator is OFF.
(When DTC of immobiliser is not output)1. Wire harness
2. ECMIN-30
IN-30
Security indicator is abnormally blinking.1. Wire harness
2. ECMIN-30
IN-30
*1 : Check that the key which did not start the engine has been registered and that it is possible to start with
other already registered key.
*2 : Finish the automatic registration mode because the mode might still remain.

H03354
H06141AB0119H08272
Airbag
Sensor
Assembly Front Airbag
Sensor (LH)
(+)
SL+
(-)
SL-
ON
Engine Room Main
Wire Harness
u"
H03354H06140H08258
Airbag
Sensor
Assembly Front Airbag
Sensor (LH)
(+)SL+
(-)SL- Engine Room Main
Wire Harness
DI-472
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
628 Author
: Date
:
2001 AVALON (RM808U)
8 Check engine room main wire harness (to B+).
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
(a) Turn the ignition switch to ON.
(b) For the connector (on the LH front door wire harness side)
between the airbag sensor assembly and the engine
room main wire harness, measure the voltage between
body ground and each of SL+ and SL-.
OK:
Voltage: Below 1 V
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.
9 Check engine room main wire harness (to ground).
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
For the connector (on the engine room main wire harness side)
between the airbag sensor assembly and the engine room main
wire harness, measure the resistance between body ground
and each of SL+ and SL-.
OK:
Resistance: 1 MW or Higher
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.

H03354H09519H09520
Airbag
Sensor
Assembly
Front Airbag
Sensor (LH)
(-) SL+SL-
Engine Room Main
Wire Harness
(+)
u "
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-473
629 Author
: Date
:
2001 AVALON (RM808U)
10 Check engine room main wire harness.
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
For the connector (on the engine room main wire harness side)
between the airbag sensor assembly and the engine room main
wire harness, measure the resistance between SL+ and SL-.
OK:
Resistance: 1 MW or Higher
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.