Page 1043 of 1897
P00495
Outside
Inside
- DIAGNOSTICSENGINE
DI-9
165 Author: Date:
2001 AVALON (RM808U)
NO Proceed to page ST-18, and continue to trouble-
shoot.
YES
3 Does engine start?
NO Go to step 7.
YES
4 Check air filter.
PREPARATION:
Remove the air filter.
CHECK:
Visually check that the air filter is not dirty or excessive oily.
HINT:
If necessary, clean the air filter with compressed air. First blow
from inside thoroughly, then blow from outside of the air filter.
NG Repair or replace.
OK
5 Check idle speed.
PREPARATION:
(a) Warm up the engine to normal operating temperature.
(b) Switch off all the accessories.
(c) Switch off the A/C.
(d) Shift the transmission into the N position.
(e) Connect the OBD II scan tool or TOYOTA hand-held tester to the DLC3 on the vehicle.
CHECK:
Use the CURRENT DATA to check the idle speed.
OK:
Idle speed: 650 - 750 rpm
NG Proceed to problem symptoms table on page
DI-22.
Page 1045 of 1897
B04941
- DIAGNOSTICSENGINE
DI-1 1
167 Author: Date:
2001 AVALON (RM808U)
OK
8 Check for spark.
PREPARATION:
(a) Remove the ignition coil from the spark plug.
(b) Remove the spark plug.
(c) Install the spark plug to the ignition coil.
(d) Disconnect the injector connector.
(e) Be sure to ground the screw of the spark plug securely.
CHECK:
Check if spark occurs while the engine is being cranked.
NOTICE:
Do not crash the electrode gap.
To prevent excess fuel being injected from the injec-
tors during this test, don't crank the engine for more
than 5 - 10 seconds at a time.
NG Proceed to page IG-1, and continue to trouble-
shoot.
OK
Proceed to problem symptoms table on page
DI-22.
7. ENGINE OPERATING CONDITION
NOTICE:
The values given below for ºNormal Conditionº are representative values, so a vehicle may still be
normal even if its value varies differ from those listed here. So do not decide whether a part is faulty
or not solely according to the ºNormal Conditionº here.
(a) CARB mandated signals.
TOYOTA hand-held tester displayMeasurement ItemNormal Condition*
FUEL SYS #1
Fuel System Bank 1
OPEN: Air-fuel ratio feedback stopped
CLOSED: Air-fuel ratio feedback operating
Idling after warming up: CLOSED
FUEL SYS #2
Fuel System Bank 2
OPEN: Air-fuel ratio feedback stopped
CLOSED: Air-fuel ratio feedback operating
Idling after warming up: CLOSED
CALC LOADCalculator Load: Current intake air volume as a
proportion of max. intake air volumeIdling: 13.1 - 18.7 %
Racing without load (2,500rpm): 11.7 - 17.3 %
COOLANT TEMPEngine Coolant Temp. Sensor ValueAfter warming up: 80 - 95°C (176 - 203°F)
SHORT FT #1Short-term Fuel Trim Bank 10 ± 20 %
LONG FT #1Long-term Fuel Trim Bank 10 ± 20 %
Page 1046 of 1897
DI-12
- DIAGNOSTICSENGINE
168 Author: Date:
2001 AVALON (RM808U)SHORT FT #2
Short-term Fuel Trim Bank 20 ± 20 %
LONG FT #2Long-term Fuel Trim Bank 20 ± 20 %
ENGINE SPDEngine SpeedIdling: 650 - 750 rpm
VEHICLE SPDVehicle SpeedVehicle stopped: 0 km/h (0 mph)
IGN ADVANCEIgnition Advance: Ignition Timing of Cylinder No.1Idling: BTDC 10 - 25.0°
INTAKE AIRIntake Air Temp. Sensor ValueEquivalent to Ambient Temp.
MAFAir Flow Rate Through Mass Air Flow Meter
Idling: 3.3 - 4.7 gm/sec.
Racing without load (2,500 rpm):
10.4 - 15.4 gm/sec.
THROTTLE POSVoltage Output of Throttle Position Sensor Calcu-
lated as a percentage: 0 V "0 %, 5 V "100 %Throttle valve fully closed: 7 - 11 %
Throttle valve fully open: 65 - 75 %
O2FT B1 S1Oxygen Sensor Fuel Trim Bank 1 Sensor 1
(Same as SHORT FT #1)0 ± 20 %
O2S B1 S2Voltage Output of Oxygen Sensor Bank 1 Sensor
2Driving 50 km/h (31 mph): 0.05 - 0.95 V
O2FT B2 S1Oxygen Sensor Fuel Trim Bank 2 Sensor 1
(Same as SHORT FT #2)0 ± 20 %
A/FS B1 S1Voltage Output of A/F Sensor Bank 1 Sensor 1Idling: 2.8 - 3.8 V
A/FS B2 S1Voltage Output of A/F Sensor Bank 2 Sensor 1Idling: 2.8 - 3.8 V
A/FFT B1 S1A/F Sensor Fuel Trim Bank 1 Sensor 1
(Same as SHORT FT #1)0 ± 20 %
A/FFT B2 S1A/F Sensor Fuel Trim Bank 2 Sensor 1
(Same as SHORT FT #1)0 ± 20 %
*: If no conditions are specifically stated for ºldlingº, it means the shift lever is at N or P position, the A/C switch
is OFF and all accessory switches are OFF.
(b) TOYOTA Enhanced Signals.
TOYOTA hand-held tester displayMeasurement ItemNormal Condition*
MISFIRE RPMEngine RPM for first misfire rangeMisfire 0: 0 rpm
MISFIRE LOADEngine load for first misfire rangeMisfire 0: 0 g/r
INJECTORFuel injection time for cylinder No.1Idling: 1.6 - 2.9 ms
IAC DUTY RATIOIntake Air Control Valve Duty Ratio
Opening ratio rotary solenoid type IAC valveIdling: 27 - 47 %
STARTER SIGStarter SignalCranking: ON
CTP SIGClosed Throttle Position SignalThrottle fully closed: ON
A/C SIGA/C Switch SignalA/C ON: ON
PNP SWPark/Neutral Position Switch SignalP or N position: ON
ELCTRCL LOAD SIGElectrical Load SignalDefogger switch ON: ON
STOP LIGHT SWStop Light Switch SignalStop light switch ON: ON
PS OIL PRESS SWPower Steering Oil Pressure Switch SignalTurn steering wheel: ON
FC IDLFuel Cut Idle: Fuel cut when throttle valve fully
closed, during decelerationFuel cut operating: ON
FC TAUFuel Cut TAU: Fuel cut during very light loadFuel cut operating: ON
CYL#1 - CYL#6Abnormal revolution variation for each cylinder0 %
IGNITIONTotal number of ignition for every 1,000 revolu-
tions0 - 3,000
INTAKE CTRL VSVIntake Air Control Valve VSV SignalVSV operating: ON
A/C CUT SIGA/C Cut SignalA/C S/W OFF: ON
FUEL PUMPFuel Pump SignalIdling: ON
Page 1052 of 1897
I11736
Transponder Key
Amplifier
18
E7
E719
28
E7
CODERXCK TXCT
CODE RXCKTXCT
L-Y
L-O
P-G 4
3
2ECM
T6 DI-606
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
762 Author: Date:
2001 AVALON (RM808U)
DTC B2796/99 No Communication in Immobiliser system
CIRCUIT DESCRIPTION
This code is stored in memory when inserting the key that does not have a transponder chip or if communica-
tion between the key and ECM is impossible.
DTC No.DTC Detecting ConditionTrouble Area
B2796/99No communication
Key
Transponder Key Coil
Transponder Key Amplifier
Wire harness
ECM
WIRING DIAGRAM
DI1AT-23
Page 1053 of 1897
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI-607
763 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Delete DTC and insert all the presently available keys to check whether the en-
gine starts or not.
RESULT:
AAll keys start the engine.
BA specific key does not start the engine. In this case, DTC
(B 2796) is stored in memory.
CAll keys do not start the engine. In this case, DTC (B 2796)
is stored in memory.
A No problem at this time.
HINT:
If the result is ºAº, please confirm whether or not customers
have ever inserted the key (without transponder chip) of other
vehicle in the ignition key cylinder, and find out the cause of de-
tecting DTC.
B The transponder chip of a specific key is defec-
tive. Replace the key.
C
2 Check transponder key coil (See page BE-181).
NG Replace transponder key coil.
OK
3 Check harness and connector between transponder key amplifier and ECM.
NG Repair or replace harness and connector.
OK
Page 1057 of 1897
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
Page 1058 of 1897
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.
Page 1062 of 1897
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 codeKey
Unregistered key inserted before
B2796
(DI-606)No communication in immobiliser system
Key
Transponder key coil
Amplifier
Wirehaness
ECM
B2797
(DI-609)Communication malfunctionCommunication 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.
