1996 TOYOTA T100 low oil pressure

Downloaded from www.Manualslib.com manuals search engine Z09691
w/ Tachometer
w/o TachometerB
A
C
B A
N02651
Warning Light
Ignition
Switch
Battery
BE0146
BE1222
Oil Pressure Gauge
Ignition
Switch
BatterySender
Gauge BE−42
− BODY ELECTRICALCOMBINATION METER
1996 TOYOTA T100 (RM449U)
12. INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
w/ Tachometer:
Between terminalsResistance (Ω)
A − BApprox. 150.0
A − CApprox. 54.0
B − CApprox. 138.0
w/o Tachometer:
Between terminalsResistance (Ω)
A − BApprox. 25.0
HINT:
Connect the test leads so that the current from the ohmmeter
can flow according to the above order. This circuit includes the
diode.
If resistance value is not as specified, replace the receiver
gauge.
13. INSPECT OIL PRESSURE WARNING LIGHT
(a) Disconnect the connector from the warning switch and
ground terminal on the wire harness side connector.
(b) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, test the bulb.
14. INSPECT OIL PRESSURE SENDER GAUGE
(a) Disconnect the connector from the sender gauge.
(b) Check that there is continuity between terminal and
ground with the engine stopped.
(c) Check that there is no continuity between terminal and
ground with the engine running.
HINT:
Oil pressure should be over 49 kPa (0.5 kgf/cm
2, 7.1 psi).
If operation is not as specified, replace the sender gauge.
15. INSPECT RECEIVER OIL PRESSURE GAUGE OP-
ERATION
(a) Disconnect the connector from the sender gauge.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates LOW.

Downloaded from www.Manualslib.com manuals search engine AC2810
AC0EV−02
AC2811
N11084
Wrong Okay
HI LO HILO
− AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC−1
1935 Author: Date:
1996 TOYOTA T100 (RM449U)
AIR CONDITIONING SYSTEM
PRECAUTION
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR WEAR EYE PROTECTION
2. ALWAYS WEAR EYE PROTECTION
3. BE CAREFUL NOT TO GET LIQUID REFRIGERANT IN
YOUR EYES OR ON YOUR SKIN
If liquid refrigerant gets in your eyes or on your skin.
(a) Wash the area with lots of cool water.
CAUTION:
Do not rub your eyes or skin.
(b) Apply clean petroleum jelly to the skin.
(c) Go immediately to a physician or hospital for professional
treatment.
4. NEVER HEAT CONTAINER OR EXPOSE IT TO NAKED
FLAME
5. BE CAREFUL NOT TO DROP CONTAINER AND NOT
TO APPLY PHYSICAL SHOCKS TO IT
6. DO NOT OPERATE COMPRESSOR WITHOUT
ENOUGH REFRIGERANT IN REFRIGERATION SYS-
TEM
If there is not enough refrigerant in the refrigerant system oil lu-
brication will be insufficient and compressor burnout may occur,
so that care to avoid this, necessary care should be taken.
7. DO NOT OPEN PRESSURE MANIFOLD VALVE WHILE
COMPRESSOR IS OPERATE
If the high pressure valve is opened, refrigerant flows in the re-
verse direction and could cause the charging cylinder to rup-
ture, so open and close the only low pressure valve.
8. BE CAREFUL NOT TO OVERCHARGE SYSTEM WITH
REFRIGERANT
If refrigerant is overcharged, it causes problems such as insuffi-
cient cooling, poor fuel economy, engine overheating etc.

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Condition: Insufficient cooling
NOTE : These gauge indica-
tions are shown when the
refrigeration system has
been opened and the refrig-
erant charged without vacu-
um purging.
I01450
Condition: Insufficient cooling
− AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC−7
1996 TOYOTA T100 (RM449U)
(7) Air present in refrigeration system
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure too high on both low
and high pressure sides
 The low pressure piping hot to
the touch
 Bubbles seen in sight glass
Air entered in refrigeration system
 AIr present in refrigeration sys-
tem
 Insufficient vacuum purging
(1) Check compressor oil to see if
it is dirty or insufficient
(2) Evacuate air and charge new
refrigerant
(8) Expansion valve improperly
Mounted/ Heat sensing tube defective
(Open too wide)
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure too high on both low
and high pressure sides
 Frost or large amount of dew on
piping on low pressure side
Trouble in expansion valve or heat
sensing tube not installed correctly
 Excessive refrigerant in low
pressure piping
 Expansion valve opened too
wide(1) Check heat sensing tube
installed condition
(2) Check expansion valve
Replace if defective

Downloaded from www.Manualslib.com manuals search engine AC0FB−02
Z04403
Liquid TubeExpansion Valve
Z04402
AC−24
− AIR CONDITIONINGCOOLING UNIT
1996 TOYOTA T100 (RM449U)
DISASSEMBLY
1. REMOVE A/C AMPLIFIER
2. SEPARATE COOLING UNIT CASES
(a) Using a knife, cut off each packing.
(b) Remove the 4 clip and 4 screws then separate the cooling
unit cases.
3. REMOVE EVAPORATOR FROM COOLING UNIT CASE
HINT:
At the time of reassembly, please refer to the following item,.
If evaporator is replaced, add compressor oil to evaporator.
Add 40 cc (1.4 fl.oz.)
Compressor oil: ND−OIL 8 or equivalent
4. REMOVE THERMISTOR FROM EVAPORATOR
(a) Disconnect the connector from pressure switch.
(b) Pull out the thermistor from evaporator.
5. REMOVE EXPANSION VALVE
(a) Pry out the packing.
(b) Remove the clamp and disconnect heat sensing tube.
(c) Loosen the 2 nuts and remove the expansion valve.
Torque:
Expansion valve x Liquid tube:
14 N·m (140 kgf·cm, 10 ft·lbf)
Expansion valve x Evaporator:
22 N·m (225 kgf·cm, 16 ft·lbf)
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
HINT:
At the time of reassembly, please refer to the following item.
Lubricate 2 new O−rings with compressor oil and install the
valve.
6. REMOVE PRESSURE SWITCH
(a) Disconnect the connector.
(b) Remove the pressure switch from liquid tube.
Torque: 10 N·m (100 kgf·cm, 7 ft·lbf)
HINT:
Lock the switch mounted on the tube with on open end
wrench, being careful not to deform the tube and remove
the switch.
At the time of installation, please refer to the following
item.
Lubricate a new O−ring with compressor oil and install the
valve.

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I01456
AC−76
− AIR CONDITIONINGPRESSURE SWITCH
1996 TOYOTA T100 (RM449U)
REMOVAL
1. REMOVE EVAPORATOR (See page AC−53)
2. REMOVE PRESSURE SWITCH FROM LIQUID TUBE
Disconnect the connector and remove the pressure switch.
Torque: 10 N·m (100 kgf·cm, 7 ft·lbf)
HINT:
Lock the switch mounted on the tube with an open end
wrench, being careful not to deform the tube and remove
the switch.
At the time of installation, please refer to the following
item.
Lubricate a new O−ring with the compressor oil and install
the switch.