sensor TOYOTA AVALON 2001 Service Repair Manual

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

- DIAGNOSTICSENGINE
DI-21
177 Author
: Date
:
2001 AVALON (RM808U) EVP1 (E5-7) - E01 (E4-21)
B-R eW-BIG switch ON9 - 14
CCV (E8-10) - E01 (E4-21)G eW-BIG switch ON9 - 14
RSO (E4-26) - E01 (E4-21)G-B eW-BIG switch ON, Disconnect E11 connector from ECM9 - 14
OXS (E7-8) - E1 (E5-17)B eBRMaintain engine speed at 2,500 rpm for 3 min. after warming upPulse generation
(See page DI-71)
HTS (E7 9) E03 (E4 30)LGWBIdlingBelow 3.0HTS (E7-9) - E03 (E4- 30)LG eW-BIG switch ON9 - 14
KNKR (E4-27) - E1 (E5-17)W eBRIdliPulse generation
KNKL (E4-28) - E1 (E5-17)W eBRIdlingPulse generation
(See page DI-64)
NSW (E7 20) E1 (E5 17)BWBRIG switch ON, Other shift position in P, N9 - 14NSW (E7-20) - E1 (E5-17)B-W eBRIG switch ON, Shift position in P, N0
TACH (E7-27) - E1 (E5-17)B eBRIdlingPulse generation
TBP (E7-3) - E01 (E4-21)P-B eW-BIG switch ON, Disconnect vacuum hose from vapor pressure
sensor9 - 14
PTNK (E8 17) E2 (E5 18)PWIG switch ON2.9 - 3.7PTNK (E8-17) - E2 (E5-18)P eWIG switch ON, Apply vacuum 4.0 kPa (30 mmHg, 1.18 in.Hg)0.5 or less
SIL (E8-4) - E1 (E5-17)W eBRDuring transmissionPulse generation
STP (E8 15) E1 (E5 17)GWBRIG switch ON, Brake pedal depressed7.5 - 14STP (E8-15) - E1 (E5-17)G-W eBRIG switch ON, Brake pedal releasedBelow 1.5
AFR+ (E5-11) - E1 (E5-17)B-R eBRIG it h ON30 36AFL+ (E5-12) - E1 (E5-17)B-W eBRIG switch ON3.0 - 3.6
AFR- (E5-20) - E1 (E5-17)BR eBRIG it h ON27 33AFL- (E5-21) - E1 (E5-17)L eBRIG switch ON2.7 - 3.3
HAFR (E5-3) - E04 (E5-1)B-R eW-BIdlingBelow 3.0HAFR (E5 3) E04 (E5 1)
HAFL (E5-4) - E05 (E5-8)
BR eWB
B-R eW-BIG switch ON9 - 14
KSW (E7 23) E1 (E5 17)RYBRAt time of inserting keyBelow 1.5KSW (E7-23) - E1 (E5-17)R-Y eBRIn condition without key inserted4 - 5
CODE (E7-28) - E1 (E5-17)P-G eBRAt time of inserting keyPulse generation
IGSW (E8-2) - E1 (E5-17)B-O eBRIG switch ON9 - 14
TXCT (E7-18) - E1 (E5-17)L-Y eBRAt time of inserting keyPulse generation
IMLD (E8-22) - E1 (E5-17)V-W eBRIn condition without key insertedPulse generation
MREL (E8-8) - E1 (E5-17)L-O eBRIG switch ON9 - 14

I13626
SGND
SYSB J14
J/C
25 19
3C5
FL MAIN
BatteryEngine Room J/B J/B No. 3
IHP21
P21
W-G
DCC ECU-B
FL BlockB
BR BRB 9
BC1
BR 9
IA1
BR
J13
J/C A
A3E14
W-G W-G5
BC1
Driver Side J/B
1B9
1J9
W-L
2C1
2G2
B
F71
F61
B
BRPower Seat ECU
- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI-497
653 Author
: Date
:
2001 AVALON (RM808U)
ECU Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power for ECU operation and is also the power source for the sensor.
WIRING DIAGRAM
DI0G1-09

BE3991
1 pulse output per one
turn of motor
Position Sensor
(in Motor)8 V
0 V
ECU
N14754
Example: Slide Motor
Motor Sensor
(+)
2
(+) (-)
(-)1 31 2
DI-506- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
662 Author
: Date
:
2001 AVALON (RM808U)
Position Sensor Circuit
CIRCUIT DESCRIPTION
The position sensor senses movement of the seat and send
pulse signals to the ECU. The position sensor sends pulse to
the ECU in proportion to the amount of seat movement, as
shown in the diagram on the left.
The ECU uses the number of pulses to constantly calculate the
position relative to the memory position and returns the seat to
the memorized position.
If a malfunction occurs in a position sensor and a sensor signal
is not input to the ECU even when the motor operates, the ECU
prohibits return operation.
WIRING DIAGRAM
See page DI-504.
INSPECTION PROCEDURE
1 Check position sensor.
PREPARATION:
Disconnect the connector of the sensor and the connector of
the motor leading to the sensor.
CHECK:
(a) Connect positive
lead to terminal 3 of sensor and nega-
tive  lead to terminal 2.
(b) Measure voltage between terminal 1 of sensor and body
ground when battery positive voltage is applied between
terminals 1 and 2 of motor connector.
HINT:
When the battery positive voltage is applied to the motor con-
nector terminals,
and  are interchangeable.
OK:
ConditionVoltage
Motor stopped
(Check several times with the motor in a
different position each time.)0 V or battery positive voltage according
to stop position.
with motor turninghalf of battery positive voltage
NG Replace position sensor.
OK
DI0G9-08

- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI-507
663 Author
: Date
:
2001 AVALON (RM808U)
2 Check harness and connectors between Seat Position Control ECU and position
sensors (See page IN-30).
NG Repair or replace harness or connectors.
OK
Check and replace Seat Position Control
ECU.

I13624
SSRR
PVCC
SSFV SSRS
SSRL L-BL
R
L-W53
4 16
17Power Seat ECU
1 2
1 2
1 2
1 2
3 3 3 3
BR
BR
BR B
BB B
BR J14
J/C
9
9
BR
BR A
AJ3
J/C
IHP21
P21
P21
P21
P21 L-R BR
P30
P29
P32
P31
Power Seat
Position Sensor
Reclining Control
Front Vertical Control
Rear Vertical Control Slide Control
IA1 BC1
BR
J/CJ14
A
A
A A R
R
R
R DI-504
- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
660 Author
: Date
:
2001 AVALON (RM808U)
Position Sensor Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power to the slide, front vertical and reclining position sensors.
WIRING DIAGRAM
DI0G6-09

I11593
(+) (-)
5 (PVCC)
- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI-505
661 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check voltage between terminal PVCC of Seat Position Control ECU connector
and body ground.
PREPARATION:
Remove Seat Position Control ECU with connectors still con-
nected.
CHECK:
While operating the Power Seat Control Switch and moving the
seat, check voltage between terminal PVCC of Seat Position
Control ECU connector and body ground.
OK:
Voltage: 7.2 - 8.8 V
OK Proceed to next circuit inspection shown on
problem symptom table (See page DI-493).
NG
2 Check harness and connector connected to terminal PVCC of Seat Position Con-
trol ECU (See page IN-30).
CHECK:
Check for open or short in the harness and check connectors for the position sensor power source circuit
outlined in the diagram with a thick line (-).
NG Repair or replace harness or connector.
OK
Check and replace Seat Position Control
ECU.

I13623
Power Seat Switch
RCLR
BKJ11
J/C 8R-B
B-Y
R-W
R-YG
G-B
B
7 2
3
10
9 6 5
11B-R
W-B
A W-B W-B W-B 1
CC CRCLF
FDWN
FUP
SLDR
SLDF
LUP
LDWN
GND Power Seat ECU
P18
BC1P21
P21
P21
P21
P21
P21
P21
P21
P2112
10
24
23
8
6
22
11
7
J14
J/C DI-510
- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
666 Author
: Date
:
2001 AVALON (RM808U)
Power Seat Control Switch Circuit
CIRCUIT DESCRIPTION
When the power seat control switch is operated, a signal is sent from the power seat control switch to the
ECU and the ECU sends a signal to the motor to make it operate.
Even if a malfunction should occur with the position sensor and return operation is prohibited, manual opera-
tion will occur as normal.
WIRING DIAGRAM
DI0GG-06

DI0FV-08
- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI-493
649 Author
: Date
:
2001 AVALON (RM808U)
PROBLEM SYMPTOMS TABLE
Perform troubleshooting of the circuits for the applicable problem symptom in the order given in the chart
below. Proceed to the page located for each circuit.
HINT:

If the instruction ºProceed to next circuit inspection shown on problem symptom tableº is given in the
flow chart for each circuit, proceed to the circuit with the next highest number in the table to continue
the check.

If the trouble still reappears even though there are no abnormalities in any of the other circuits, then
check and replace the Seat Position Control ECU as the last step.
SymptomSuspect AreaSee page
Both manual & return functions do not operate(All functions).
3. +B power source circuit
4. Power seat control switch circuit
5. Motor circuit
6. Power seat control ECUDI-494
DI-510
DI-500
IN-30
Both manual & return functions do not operate(One function only).1. Motor circuit
2. Power seat control ECUDI-500
IN-30
One or all functions do not operate for manual operation only.1. Power seat control switch circuit
2. Power seat control ECUDI-510
IN-30
Memory function does not operate.
1. Power seat memory switch circuit
2. Ignition switch circuit
3. Power seat control ECUDI-510
DI-508
IN-30
Return operation does not stop when brake pedal is depressed.1. Stop light switch circuit
2. Power seat control ECUDI-662
IN-30
Only return function does not operate or operates a little, then
stops (All return functions).
1. Power seat memory switch circuit
2. ECU power source circuit
3. Position sensor power source circuit
4. Power seat control ECUDI-513
DI-497
DI-504
IN-30
Only return function does not operate or operates a little, then
stops (Only one return function).1. Position sensor circuit
2. Power seat control ECUDI-506
IN-30

DI4CK-03
H01451
Y-B
D+ C6 14Airbag Sensor Assembly
13
C6D- Y 1
2
Spiral
Cable D Squib DI-362
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
518 Author
: Date
:
2001 AVALON (RM808U)
CIRCUIT INSPECTION
DTC B0100/13 Short in D Squib Circuit
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and steering wheel pad.
It causes the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-3.
DTC B0100/13 is recorded when a short is detected in the D squib circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0100/13

Short circuit between D+ wire harness and D- wire har-
ness of squib

D squib malfunction

Spiral cable malfunction

Airbag sensor assembly malfunction
Steering wheel pad (D squib)

Spiral cable

Airbag sensor assembly

Wire harness
WIRING DIAGRAM