Page 1918 of 2062

Downloaded from www.Manualslib.com manuals search engine BE03N−09
I01856
Ground
Power Source
(Illumination)(Clock Side) (Wire Harness Side) E
ILL
B
ACCPower Source
(System Operation)
Power Source
(Display Operation)
2
3
4Connector
1 CLOCK WILL NOT OPERATE
I01857
(Clock Side)
(Wire Harness Side)
B + GND
e−4−2−De−4−1−D
Ye s
Ye sNo
No
Is there battery positive voltage between terminal +B and body
ground.
Is there battery positive voltage between terminal GND and body
ground.
Replace clock.Open or short circuit in wire harness between terminal
+B and DOME fuse.
Open circuit in wire harness between terminal
GND and body ground.
− BODY ELECTRICALCLOCK
BE−83
1883 Author: Date:
1996 TOYOTA T100 (RM449U)
CLOCK
TROUBLESHOOTING
HINT:
Troubleshoot the clock according to the table below.
ProblemNo.
Clock will not operate1
Clock loses or gains time2
± 1.5 seconds / day
1. PROBLEM NO.1
(a) Check that the battery positive voltage is 10 − 16 V.
If voltage is not as specified, replace the battery.
(b) Check that the DOME fuse is not blown.
If the fuse is blown, replace the fuse and check for short.
(c) Troubleshoot the clock as follows.
HINT:
Inspect the connector on the wire harness side.
Page 1919 of 2062
Downloaded from www.Manualslib.com manuals search engine 2 CLOCK LOSES OR GAINS TIME
I01858
(Clock Side)
(Wire Harness Side)
B + GND
e−4−2−D
e−4−1−D
Ye s
Is there battery positive voltage between terminal +B and
body ground.
Adjust or replace clock.Bellow 10 V
Locate cause and repair, or rechange battery.
BE−84
− BODY ELECTRICALCLOCK
1884 Author: Date:
1996 TOYOTA T100 (RM449U)
2. PROBLEM NO.2
(a) Check that the battery positive voltage is 10 − 16 V.
If voltage is not as specified, replace the battery.
(b) Inspect the error of the clock.
Allowable error (per day): ± 1.5 seconds
If the error exceeds the allowable error, replace the clock.
(c) Check that the clock adjusting button is sticking in posi-
tion and has failed to return.
If the error exceeds the allowable error, replace the clock.
(d) Troubleshoot the clock as follows.
HINT:
Inspect the connector on the wire harness side.
Page 2008 of 2062

Downloaded from www.Manualslib.com manuals search engine AC07W−02
N13080
AC−38
− AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
1972 Author: Date:
1996 TOYOTA T100 (RM449U)
COMPRESSOR AND MAGNETIC
CLUTCH
ON−VEHICLE INSPECTION
1. SET ON MANIFOLD GAUGE SET
(See page AC−17)
2. START ENGINE
3. INSPECT COMPRESSOR FOR METALLIC SOUND
Check if there is an abnormal metallic sound from the compres-
sor when the A/C switch is on.
If abnormal metallic sound is heard, replace the compressor as-
sembly.
4. INSPECT REFRIGERANT PRESSURE
See ”ON−VEHICLE INSPECTION” of AIR CONDITIONING
SYSTEM on page AC−3.
5. STOP ENGINE
6. INSPECT VISUALLY FOR LEAKAGE OF REFRIGER-
ANT FROM SAFETY SEAL
Using a gas leak detector, check for leakage of refrigerant.
If there is any leakage, replace the compressor assembly.
7. SET OFF MANIFOLD GAUGE SET
(See page AC−18)
8. MAKE THESE VISUAL CHECK:
(a) Leakage of grease from the clutch bearing.
(b) Signs of oil on the pressure plate
If necessary, repair or replace.
9. INSPECT MAGNETIC CLUTCH BEARING FOR NOISE
(a) Start engine.
(b) Check for abnormal noise from near the compressor
when the A/C switch is OFF.
If abnormal noise is being emitted, replace the magnetic clutch.
10. INSPECT MAGNETIC CLUTCH OPERATION
(a) Disconnect the connector.
(b) Connect the positive (+) lead from the battery to terminal
on the magnetic clutch connector and the negative (−)
lead to the body ground.
(c) Check that the magnetic clutch is energized.
If operation is not as specified, replace the magnetic clutch.
Page 2010 of 2062
Downloaded from www.Manualslib.com manuals search engine AC07Y−02
AC−40
− AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
1996 TOYOTA T100 (RM449U)
REMOVAL
1. RUN ENGINE AT IDLE SPEED WITH A/C ON FOR APPROX. 10 MINUTES WITH A/C ON
2. STOP ENGINE
3. DISCONNECT NEGATIVE (−) TERMINAL CABLE FROM BATTERY
4. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM
5. REMOVE ENGINE UNDER COVER
6. DISCONNECT DISCHARGE AND SUCTION HOSES
Remove the 2 bolts and disconnect the both hoses.
NOTICE:
Cap the open fitting immediately to keep moisture or dirt out of the system.
7. REMOVE DRIVE BELT (See page AC−15)
8. 5VZ−FE Engine Models:
REMOVE PS PUMP SET BOLT AND NUT
9. REMOVE COMPRESSOR
(a) Disconnect the connector.
(b) Remove the 4 bolts and compressor.
Page 2014 of 2062
Downloaded from www.Manualslib.com manuals search engine AC080−02
N04963
Dial Indicator AC−44
− AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
1996 TOYOTA T100 (RM449U)
REASSEMBLY
Reassembly is in the reverse order of disassembly
(See page AC−41).
AFTER REASSEMBLY, CHECK THE MAGNETIC CLUTCH
CLEARANCE
(a) Set the dial indicator to the pressure plate of the magnetic
clutch.
(b) Connect the magnetic clutch lead wire to the positive (+)
terminal of the battery.
(c) Check the clearance between the pressure plate and ro-
tor when connecting the negative (−) terminal to the bat-
tery.
Standard clearance:
0.5 ± 0.15 mm (0.020 ± 0.0059 in.)
If the clearance is not within the standard clearance, adjust the
clearance using shims to obtain the standard clearance.
Shim thickness:
0.1 mm (0.004 in.)
0.3 mm (0.012 in.)
0.5 mm (0.020 in.)
Page 2015 of 2062

Downloaded from www.Manualslib.com manuals search engine AC081−02
− AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
AC−45
1996 TOYOTA T100 (RM449U)
INSTALLATION
1. INSTALL COMPRESSOR
(a) Install the compressor with 4 bolts.
Torque: 25 N·m (250 kgf·cm, 18 ft·lbf)
(b) Connect the connector.
2. CONNECT DISCHARGE AND SUCTION HOSES
Connect the both hoses with the 2 bolts.
Torque: 10 N·m (100 kgf·cm, 7 ft·lbf)
NOTICE:
Hose should be connected immediately after the caps have been removed.
HINT:
Lubricate 2 new O−rings with compressor oil and install the hoses.
3. INSTALL AND CHECK DRIVE BELT
(See page AC−16, AC−14)
4. INSTALL ENGINE UNDER COVER
5. 5VZ− FE Engine Models:
INSTALL PS PUMP SET BOLT AND NUT
Torque: 43 N·m (440 kgf·cm, 32 ft·lbf)
6. CONNECT NEGATIVE (−) TERMINAL CABLE TO BATTERY
7. EVACUATE AIR FROM REFRIGERATION SYSTEM
8. CHARGE SYSTEM WITH REFRIGERANT
Specified amount: 650 ± 50 g (22.92 ± 1.76 oz.)
9. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leakage of refrigerant.
If there is leakage, check the tightening torque at the joints.
10. INSPECT A/C OPERATION
Page 2036 of 2062
Downloaded from www.Manualslib.com manuals search engine AC0G6−01
I02318
1
2
AC−66
− AIR CONDITIONINGBLOWER MOTOR
1996 TOYOTA T100 (RM449U)
INSPECTION
INSPECT BLOWER MOTOR OPERATION
Connect the positive (+) lead from the battery to terminal 1 and
the negative (−) lead to terminal 2, then check that the motor op-
erations smoothly.
If operation is not as specified, replace the blower motor.
Page 2049 of 2062

Downloaded from www.Manualslib.com manuals search engine Z14605
Wire Harness SideAC0GJ−02
Z14604
From Back Side
− AIR CONDITIONINGAIR CONDITIONING AMPLIFIER
AC−79
2013 Author: Date:
1996 TOYOTA T100 (RM449U)
AIR CONDITIONING AMPLIFIER
ON−VEHICLE INSPECTION
INSPECT AMPLIFIER CIRCUIT
(a) Remove the glove compartment door
(See page BO−36).
(b) Disconnect the amplifier connector and inspect the con-
nector on wire harness side, as shown in the chart below.
Test conditions:
Temperature control lever MAX. COOL
A/C switch ON
Turn ignition switch to ON
Blower speed switch at HI
Tester connectionConditionSpecified condition
8 − GroundConstantContinuity
2 − 6ConstantContinuity
2 − 10Evaporator temperature at 25 °C (77 °F)Approx. 1.5 kΩ at 25 °C (77 °F)
4 − GroundA/C switch ONBattery positive voltage
4 − GroundA/C switch OFFNo voltage
1 − ECM terminal ACTConstantContinuity
9 − ECM terminal AC1ConstantContinuity
7 − GroundA/C switch ONContinuity
7 − GroundA/C switch OFFNo continuity
If the circuit is not as specified, inspect the circuits connected
to other parts.
(c) Connect the connector to amplifier and inspect wire har-
ness side connector from the back side, as shown in the
chart below.
Test conditions
Running engine at idle speed
Blower speed switch at ”HI” position
A/C switch ON
Temperature control lever at ”COOL” position
Set on manifold gauge set
Tester connectionConditionSpecified condition
3 − GroundRefrigerant pressure 196 − 1,340 kPaBattery positive voltage
3 − GroundRefrigerant pressure
less than 196 or more than 3,140 kPaNo voltage
If circuit is as specified, try replacing the amplifier with a new
one. If the circuit is not as specified, inspect the circuits con-
nected to other parts.