sensor TOYOTA AVENSIS 1999 Supplement

FI7187
IN0379
Sensor Side
ECU Side
IN0378
Sensor SideECU Side
IN0380
Sensor SideECU Side
IN0381
Pull Lightly
Looseness of Crimping
IN–30– INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
2. CONNECTOR HANDLING
When inserting tester probes into a connector, insert them from
the rear of the connector. When necessary, use mini test leads.
For water resistant connectors which cannot be accessed from
behind, take good care not to deform the connector terminals.
3. CONTINUITY CHECK (OPEN CIRCUIT CHECK)
(a) Disconnect the connectors at both ECU and sensor
sides.
(b) Measure the resistance between the applicable terminals
of the connectors.
Resistance: 1 Ω or less
HINT:
Measure the resistance while lightly shaking the wire harness
vertically and horizontally.
4. RESISTANCE CHECK (SHORT CIRCUIT CHECK)
(a) Disconnect the connectors on both ends.
(b) Measure the resistance between the applicable terminals
of the connectors and body ground. Be sure to carry out
this check on the connectors on both ends.
Resistance: 1 MΩ or higher
HINT:
Measure the resistance while lightly shaking the wire harness
vertically and horizontally.
5. VISUAL CHECK AND CONTACT PRESSURE CHECK
(a) Disconnect the connectors at both ends.
(b) Check for rust or foreign material, etc. in the terminals of
the connectors.
(c) Check crimped portions for looseness or damage and
check that the terminals are secured in lock portion.
HINT:
The terminals should not come out when pulled lightly from the
back.

Z17004
Fig. 1
OPENECU
2 Sensor
22 21 111A B C
Z17005
Fig. 2
ECU
Sensor
21A
B C
1
1
22
B04722
Fig. 3
ECU
Sensor
21A B1 C
1
1
221
2 B2
– INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN–31
(d) Prepare a test male terminal and insert it in the female ter-
minal, then pull it out.
NOTICE:
When testing a gold–plated female terminal, always use a
gold–plated male terminal.
HINT:
When the test terminal is pulled out more easily than others,
there may be poor contact in that section.
6. CHECK OPEN CIRCUIT
For the open circuit in the wire harness in Fig. 1, perform ”(a)
Continuity Check” or ”(b) Voltage Check” to locate the section.
(a) Check the continuity.
(1) Disconnect connectors ”A” and ”C” and measure
the resistance between them.
In the case of Fig. 2,
Between terminal 1 of connector ”A” and terminal 1
of connector ”C” → No continuity (open)
Between terminal 2 of connector ”A” and terminal 2
of connector ”C” → Continuity
Therefore, it is found out that there is an open circuit
between terminal 1 of connector ”A” and terminal 1
of connector ”C”.
(2) Disconnect connector ”B” and measure the resis-
tance between the connectors.
In the case of Fig. 3,
Between terminal 1 of connector ”A” and terminal 1
of connector ”B1” → Continuity
Between terminal 1 of connector ”B2” and terminal
1 of connector ”C” → No continuity (open)
Therefore, it is found out that there is an open circuit
between terminal 1 of connector ”B2” and terminal
1 of connector ”C”.

Z17007
Fig. 4
Sensor
21A
C
1
1
22B5V
5V
5V
0V
Z17008
Fig. 5
2 1A C
1
1
22
BSHORT
Z17009
Fig. 6
21A C
1
1
22
BSensorECU IN–32
– INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
(b) Check the voltage.
In a circuit in which voltage is applied (to the ECU connector ter-
minal), an open circuit can be checked for by conducting a volt-
age check.
As shown in Fig. 4, with each connector still connected,
measure the voltage between body ground and terminal
1 of connector ”A” at the ECU 5V output terminal, terminal
1 of connector ”B”, and terminal 1 of connector ”C”, in that
order.
If the results are:
5V: Between Terminal 1 of connector ”A” and Body Ground
5V: Between Terminal 1 of connector ”B” and Body Ground
0V: Between Terminal 1 of connector ”C” and Body Ground
Then it is found out that there is an open circuit in the wire har-
ness between terminal 1 of ”B” and terminal 1 of ”C”.
7. CHECK SHORT CIRCUIT
If the wire harness is ground shorted as in Fig. 5, locate the sec-
tion by conducting a ”continuity check with ground”.
Check the continuity with ground.
(1) Disconnect connectors ”A” and ”C” and measure
the resistance between terminal 1 and 2 of connec-
tor ”A” and body ground.
In the case of Fig. 6
Between terminal 1 of connector ”A” and body
ground → Continuity (short)
Between terminal 2 of connector ”A” and body
ground → No continuity
Therefore, it is found out that there is a short circuit
between terminal 1 of connector ”A” and terminal 1
of connector ”C”.

Z17808
Fig. 7
Sensor
21A B1 C
1
1
221
2 B2
ECU
IN0383
Example
Ground
IN0384
Ground
Ground
ECU Side
W/H Side
– INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN–33
(2) Disconnect connector ”B” and measure the resis-
tance between terminal 1 of connector ”A” and body
ground, and terminal 1 of connector ”B2” and body
ground.
Between terminal 1 of connector ”A” and body
ground → No continuity
Between terminal 1 of connector ”B2” and body
ground → Continuity (short)
Therefore, it is found out that there is a short circuit
between terminal 1 of connector ”B2” and terminal
1 of connector ”C”.
8. CHECK AND REPLACE ECU
First check the ECU ground circuit. If it is faulty, repair it. If it is
normal, the ECU could be faulty, so replace the ECU with a nor-
mal functioning one and check that the symptoms appear.
(1) Measure the resistance between the ECU ground
terminal and the body ground.
Resistance: 1 Ω or less
(2) Disconnect the ECU connector, check the ground
terminals on the ECU side and the wire harness
side for bend and check the contact pressure.

– INTRODUCTIONTERMS
IN–35
FFFront–Engine Front–Wheel–Drive
FIPGFormed In Place Gasket
FLFusible Link
FrFront
FRFront–Engine Rear–Wheel–Drive
FWDFront–Wheel–Drive
GNDGround
H/BHatchback
HIHigh
HIDHigh Intensity Discharge (Head Lamp)
HTHard Top
HWSHeated Windshield System
IACIdle Air Control
IFSIndependent Front Suspension
IGIgnition
INTIntermittent
I/PInstrument Panel
IRSIndependent Rear Suspension
J/BJunction Block
J/CJunction Connector
LANLocal Area Network
LBLiftback
LCDLiquid Crystal Display
LEDLight Emitting Diode
LHLeft–Hand
LHDLeft–Hand Drive
LOLow
LSDLimited Slip Differential
LSP & PVLoad Sensing Proportioning And Bypass Valve
LSPVLoad Sensing Proportioning Valve
MAPManifold Absolute Pressure
MAX.Maximum
MICMicrophone
MILMalfunction Indicator Lamp
MIN.Minimum
MPMultipurpose
MPIMultipoint Electronic Fuel Injection
MPXMultiplex Communication System
M/TManual Transmission
NNeutral
No.Number
O2SOxygen Sensor
O/DOverdrive
OPTOption
P & BVProportioning And Bypass Valve
PCSPower Control System

IN–36
– INTRODUCTIONTERMS
PKB
Parking Brake
PPSProgressive Power Steering
PSPower Steering
PTOPower Take–Off
RAMRandom Access Memory
R/BRelay Block
RBSRecirculating Ball Type Steering
R/FReinforcement
RFSRigid Front Suspension
RHRight–Hand
RHDRight–Hand Drive
RLYRelay
ROMRead Only Memory
RrRear
RRRear–Engine Rear–Wheel Drive
RRSRigid Rear Suspension
RWDRear–Wheel Drive
SDNSedan
SENSensor
SICSStarting Injection Control System
SPECSpecification
SRSSupplemental Restraint System
SSMSpecial Service Materials
SSTSpecial Service Tools
STDStandard
SWSwitch
SYSSystem
T/ATransaxle
TACHTachometer
TDCTop Dead Center
TEMP.Temperature
TEMSTOYOTA Electronic Modulated Suspension
TFTToyota Free–Tronic
T/MTransmission
TMCTOYOTA Motor Corporation
TRCTraction Control System
U/DUnderdrive
VENTVentilator
VINVehicle Identification Number
VSCVehicle Skid Control Vehicle Stability Control
VSVVacuum Switching Valve
w/With
WGNWagon
W/HWire Harness
w/oWithout
1stFirst

PP282–01
– PREPARATIONSUPPLEMENTAL RESTRAINT SYSTEM
PP–17
RECOMMENDED TOOLS
09042–00020Torx Socket T40 .Airbag sensor assembly
Seatback assembly
09082–00050TOYOTA Electrical Tester Set.
09082–00040TOYOTA Electrical Tester.

SS–8
– SERVICE SPECIFICATIONSMANUAL TRANSAXLE (E251)
Transmission case x Transaxle case
2930022
Transmission oil pipe x Transaxle case1717513
Reverse shift arm bracket assembly x Transaxle case1717513
Transmission oil pump assembly x Transaxle case1717513
Transaxle case receiver x Transaxle case7.47565 in.·lbf
Clutch release fork support4748035
Control lever housing support bracket x Transaxle case1717513
Vehicle speed sensor1717513
Clutch release line bracket x Transaxle case1717513
Back–up light switch4041030
Filler and drain plugs4950036
No.1 and No.2 oil receiver pipes x Transmission case1717513
Transmission oil cooler sub–assembly x Elbow3435025
Elbow x Transaxle case2727520
Transmission oil pump case x Oil pump cover101058
Differential left case x Differential right case6364046
Ring gear set bolt1241,26091
Shift lever assembly x Body121209
Retainer x Body4.95043 in.·lbf
Grommet retainer x Body4.95043 in.·lbf

SS0IZ–02
SS–10
– SERVICE SPECIFICATIONSSUSPENSION AND AXLE
TORQUE SPECIFICATION
Part tightenedN·mkgf·cmft·lbf
Drive shaft center bearing bracket set bolt6465047
Lower suspension arm x Lower ball joint1271,30094
Tie rod and x steering knuckle4950036
Axle hub x Drive shaft2162,200159
ABS speed sensor set bolt8.08271 in.·lbf
Hub nut1031,05076

SS061–28
– SERVICE SPECIFICATIONSSUPPLEMENTAL RESTRAINT SYSTEM
SS–15
SUPPLEMENTAL RESTRAINT SYSTEM
TORQUE SPECIFICATION
Part tightenedN·mkgf·cmft·lbf
Steering wheel x Steering main shaft7879058
Front passenger airbag assembly x Instrument panel reinforcement2121015
Seatback frame set bolt2525518
Front seat installation bolt3737527
Front seat belt lap outer ancher set bolt4243031
Curtain shield airbag (infrater) x Instrument panel reinforcement9.810087 in.·lbf
Curtain Shield Airbag (deployment section) x Body55144 in.·lbf
Side and curtain shield airbag sensor assembly x Body2121015
Front seat outer belt retractor Upper bolt
Lower bolt5.0
4251
43044 in.·lbf
31
Instrument panel x Reinfocement1818413
Seatback x Body2121415