sensor TOYOTA T100 1996 Factory User Guide

Downloaded from www.Manualslib.com manuals search engine IN0379
Sensor Side
ECU Side
IN0378
Sensor SideECU Side
IN0380
Sensor SideECU Side
IN0381
Pull Lightly
Looseness of Crimping
− INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN−27
1996 TOYOTA T100 (RM449U)
2. 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.
HINT:
Measure the resistance while lightly shaking the wire har-
ness vertically and horizontally.
When tester probes are inserted into a connector, insert
the probes from the back. For waterproof connectors in
which the probes cannot be inserted from the back, be
careful not to bend the terminals when inserting the tester
probes.
3. 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.
4. 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 if the terminals are secured in lock portion.
HINT:
The terminals should not come out when pulled lightly.
(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.

Downloaded from www.Manualslib.com manuals search engine FI7187
Z17004
CB
AOPENSensor Fig. 1 ECU
1
21
21
221
Z17005
Fig. 2
SensorECU
C
BA1
21
21
2
B04722
Fig. 3
ECU
Sensor
21A B1 C
1
1
221
2 B2
IN−28− INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
1996 TOYOTA T100 (RM449U)
5. 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.
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”.

Downloaded from www.Manualslib.com manuals search engine Z17007
Fig. 4
Sensor
CA1
21
21
2ECU
B
5 V
5 V0 V5 V
Z17008
CBASHORT
Fig. 5
1
21
22 1
Z17009
Fig. 6
SensorECU
CB
A1
21
21
2
− INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN−29
1996 TOYOTA T100 (RM449U)
(b) Check the voltage.
In a circuit in which voltage is applied (to the ECU connec-
tor terminal), an open circuit can be checked for by con-
ducting a voltage 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”.

Downloaded from www.Manualslib.com manuals search engine Z17808
Fig. 7
SensorECU
C
A
1
21
21
221 B2 B1
IN0383
Example
Ground
IN0384
ECU Side
Ground
W/H Side
Ground
IN−30− INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
1996 TOYOTA T100 (RM449U)
(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.

Downloaded from www.Manualslib.com manuals search engine IN−34
− INTRODUCTIONTERMS
1996 TOYOTA T100 (RM449U) HO2S
Heated Oxygen SensorHeated Oxygen Sensor (HO2S)
IACIdle Air ControlIdle Speed Control (ISC)
IATIntake Air TemperatureIntake or Inlet Air Temperature
ICMIgnition Control Module−
IFIIndirect Fuel InjectionIndirect Injection
IFSInertia Fuel−Shutoff−
ISCIdle Speed Control−
KSKnock SensorKnock Sensor
MAFMass Air FlowAir Flow Meter
MAPManifold Absolute PressureManifold Pressure
Intake Vacuum
MCMixture Control
Electric Bleed Air Control Valve (EBCV)
Mixture Control Valve (MCV)
Electric Air Control Valve (EACV)
MDPManifold Differential Pressure−
MFIMultiport Fuel InjectionElectronic Fuel Injection (EFI)
MILMalfunction Indicator LampCheck Engine Light
MSTManifold Surface Temperature−
MVZManifold Vacuum Zone−
NVRAMNon−Volatile Random Access Memory−
O2SOxygen SensorOxygen Sensor, O2 Sensor (O2S)
OBDOn−Board DiagnosticOn−Board Diagnostic (OBD)
OCOxidation Catalytic ConverterOxidation Catalyst Converter (OC), CCo
OPOpen LoopOpen Loop
PAIRPulsed Secondary Air InjectionAir Suction (AS)
PCMPowertrain Control Module−
PNPPark/Neutral Position−
PROMProgrammable Read Only Memory−
PSPPower Steering Pressure−
PTOXPeriodic Trap OxidizerDiesel Particulate Filter (DPF)
Diesel Particulate Trap (DPT)
RAMRandom Access MemoryRandom Access Memory (RAM)
RMRelay Module−
ROMRead Only MemoryRead Only Memory (ROM)
RPMEngine SpeedEngine Speed
SCSuperchargerSupercharger
SCBSupercharger Bypass−
SFISequential Multiport Fuel InjectionElectronic Fuel Injection (EFI), Sequential Injection
SPLSmoke Puff Limiter−
SRIService Reminder Indicator−
SRTSystem Readiness Test−
STScan Tool−
TBThrottle BodyThrottle Body
TBIThrottle Body Fuel InjectionSingle Point Injection
Central Fuel Injection (Ci)
TCTurbochargerTurbocharger
TCCTorque Converter ClutchTorque Converter

Downloaded from www.Manualslib.com manuals search engine − INTRODUCTIONTERMS
IN−35
1996 TOYOTA T100 (RM449U) TCM
Transmission Control ModuleTransmission ECU (Electronic Control Unit)
TPThrottle PositionThrottle Position
TRTransmission Range−
TVVThermal Vacuum ValveBimetallic Vacuum Switching Valve (BVSV)
Thermostatic Vacuum Switching Valve (TVSV)
TWCThree−Way Catalytic ConverterThree−Way Catalytic (TWC)
CC
RO
TWC+OCThree−Way + Oxidation Catalytic ConverterCCR + CCo
VA FVolume Air FlowAir Flow Meter
VRVoltage RegulatorVoltage Regulator
VSSVehicle Speed SensorVehicle Speed Sensor (Read Switch Type)
WOTWide Open ThrottleFull Throttle
WU−OCWarm Up Oxidation Catalytic Converter−
WU−TWCWarm Up Three−Way Catalytic ConverterManifold Converter
3GRThird Gear−
4GRFourth Gear−

Downloaded from www.Manualslib.com manuals search engine − PREPARATIONENGINE MECHANICAL (3RZ−FE)
PP−3
52 Author: Date:
1996 TOYOTA T100 (RM449U)
(09248−05420)Valve Lifter Stopper
09325−20010Transmission Oil Plug
09330−00021Companion Flange Holding ToolCrankshaft pulley
09550−10012Replacer Set ”B”
(09252−10010)No. 1 Replacer Handle−Valve guide busing
09608−30012Front Hub & Drive Pinion Bearing
Tool Set−
(09951−07100)Handle 100Crankshaft rear oil seal
09636−20010Upper Ball Joint Dust Cover
ReplacerCrankshaft timing gear
09816−30010Oil Pressure Switch SocketKnock sensor
09843−18020Diagnosis Check Wire
09950−40010Puller B Set
(09951−04010)Hanger 150
(09952−04010)Slide Arm

Downloaded from www.Manualslib.com manuals search engine PP0GC−02
− PREPARATIONMFI (3RZ−FE)
PP−19
68 Author: Date:
1996 TOYOTA T100 (RM449U)
MFI (3RZ−FE)
SST (Special Service Tools)
09268−41046Injection Measuring Tool Set
(09268−41091)NO.7 Union
(90405−09015)No.1 Union
09268−45012EFI Fuel Pressure Gauge
09631−22020Power Steering Hose Nut
14 x 17 mm Wrench SetFuel line flare nut
09816−30010Oil Pressure Switch SocketKnock sensor
09842−30070Wiring ”F” EFI Inspection
09843−18020Diagnosis Check Wire

Downloaded from www.Manualslib.com manuals search engine PP0FS−02
PP−11 4
− PREPARATIONSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
RECOMMENDED TOOLS
09042−00020Torx Socket T40 .Center aribag sensor assembly
09082−00040TOYOTA Electrical Tester.

Downloaded from www.Manualslib.com manuals search engine SS−8
− SERVICE SPECIFICATIONSENGINE MECHANICAL (3RZ−FE)
1996 TOYOTA T100 (RM449U) Oil strainer x Cylinder block
1818513
Oil pan x Cylinder block12.51309
Crankshaft position sensor x Timing chain cover8.58574 in.·lbf
Generator bracket x Cylinder block74.576055
Generator bracket x Timing chain cover1818513
Generator adjusting bar x Timing chain cover63.565047
A/C compressor bracket x Cylinder block4444032
A/C compressor x A/C compressor bracket2525018
Water pump pulley x Water pump2121016
Connecting rod cap x Connecting rod 1st
2nd45
Turn 90°46033
Main bearing cap x Cylinder block 1st
2nd39
Turn 90°40029
No.1 balance shaft x Timing gear3636526
No.2 balance shaft x Timing sprocket3636526
Balance shaft x Cylinder block1818513.4
Rear oil seal retainer x Cylinder block13.51359.7
RH, LH engine mounting bracket x Cylinder block4545034
Oil dipstick guide x LH engine mounting bracket2020014
Oil filter bracket union, Engine coolant drain plug x Cylinder block2525018
Oil filter bracket x Cylinder block2829021
Water bypass pipe x Cylinder block2020014
Knock sensor x Cylinder block3738027
Fuel filter x Cylinder block2020014
Rear end plate x Cylinder block1818513
Rear end plate x Water bypass pipe2020014
Flywheel x Crankshaft 1st
2nd26.5
Turn 90°27019
Front crossmember x Engine rear mounting bracket2526019
Front exhaust pipe clamp x Exhaust manifold6263046
Exhaust support bracket x Transmission3940029
Front exhaust pipe clamp1919514
Front exhaust pipe x TWC3940029
Engine rear mounting bracket x Engine rear mounting insulator1818313
Engine front mounting insulator x Frame3838728
Clutch release cylinder bracket x Transmission3940029
Clutch release cylinder x Transmission131309
Stabilizer bar bracket mounting bolt3030622
Stabilizer bar x Lower suspension arm131309
Intake air connector x Cylinder head1818513
Radiator x Body1818513