Terminal TOYOTA LAND CRUISER 1996 J80 User Guide

Z17808
Fig. 7Sensor 21 A
B1
C
1
1
221 2
B2
ECU
IN0383
Example
Ground
IN0384
Ground
Ground
ECU Side
W/H Side
IN−32
−
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
1996 LAND CRUISER (RM451U)
(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.
In the case of Fig. 7:
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 groundterminal 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.
o
D~~~D~~~
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

AC2R7−04
AC0943
SST
AC0944
SST
AC0945
SST
−
AIR CONDITIONING COMPRESSOR AND MAGNETIC CLUTCH
AC−35
1996 LAND CRUISER (RM451U)
DISASSEMBLY
1. RUN ENGINE AT IDLE SPEED WITH A/C SWITCH ON
FOR 10 MINUTES
2. STOP ENGINE
3. DISCONNECT NEGATIVE ( −) TERMINAL CABLE
FROM BATTERY
4. DISCHARGE REFRIGERANT FROM REFRIGERA TION
SYSTEM
5. DISCONNECT DISCHARGE AND SUCTION HOSES
Remove the 2 bolts and disconnect the both hoses.
NOTICE:
Cap the open fittings immediately to keep the moisture or
dirt out of the system.
6. REMOVE ENGINE UNDER COVER
7. REMOVE DRIVE BELT (See page AC−16)
8. REMOVE COMPRESSOR
(a) Disconnect the connector.
(b) Remove the 4 bolts and pull the compressor upward.
9. REMOVE COMPRESSOR (See page AC−35 )
10. REMOVE PRESSURE PLATE
(a) Using SST and a socket wrench, remove the shaft bolt. Torque: 13.2 N·m (135 kgf·cm, 9 ft·lbf)
SST 07112 −76060
(b) Install a SST on the pressure plate. SST 07112 −66040
(c) Using SST and a socket wrench, remove the pressure plate.
SST 07112 −76060
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

AC2R8−01
N04963
AC−38
−
AIR CONDITIONING COMPRESSOR AND MAGNETIC CLUTCH
1996 LAND CRUISER (RM451U)
REASSEMBLY
1. INSTALL COMPRESSOR
(a) Install the compressor with the 4 bolts. Torque: 25 N·m (250 kgf·cm, 18 ft·lbf)
(b) Connect the connector.
2. CONNECT DISCHARGE AND SUCTION HOSES Torque: 10 N·m (100 kgf·cm, 7 ft·lbf)
NOTICE:
Hoses 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 INSPECT DRIVE BELT (See page AC−17 )
4. INSTALL ENGINE UNDER COVER
5. CONNECT NEGATIVE ( −) TERMINAL CABLE TO BAT-
TERY
6. EVACUATE AIR FROM REFRIGERATION SYSTEM
7. CHARGE SYSTEM WITH REFRIGERANT AND IN- SPECT FOR LEAKAGE OF REFRIGERANT
Specified amount:
850 ± 50 g (29.98 ± 1.76 oz.)
Using a gas leak detector, check for leakage of refrigerant.
If there is leakage, check the tightening torque at the joints.
8. INSPECT A/C OPERATION
Reassembly is in the reverse order of disassembly (See
page AC−35 ).
9. CHECK CLEARANCE OF MAGNETIC CLUTCH
(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.)
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

AC2RY−01
AC2227
AC−52
−
AIR CONDITIONING FRONT BLOWER MOTOR
1996 LAND CRUISER (RM451U)
INSPECTION
INSPECT BLOWER MOTOR OPERATION
Connect the positive (+) lead from the battery to terminal 2 and
the negative (− ) lead to terminal 1, then check that the motor op-
eration is smooth.
If operation is not as specified, replace the blower motor.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

AC2S1−02
12
−
AIR CONDITIONING REAR BLOWER MOTOR
AC−55
1996 LAND CRUISER (RM451U)
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 motor.
2
BE2611
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

AC3JO−01
N09039
1
2
34
−
AIR CONDITIONING BLOWER RESISTOR
AC−57
1384
Author: Date:
1996 LAND CRUISER (RM451U)
BLOWER RESISTOR
INSPECTION
1. REMOVE GLOVE COMPARTMENT DOOR (See page
BO−76 )
2. REMOVE BLOWER RESISTOR
Disconnect the connector and remove the 2 screws and blower
resistor.
3. INSPECT BLOWER RESISTOR RESISTANCE
Measure resistance between terminals 1 and 4. Standard resistance: 1.8 − 2.2 Ω
If resistance is not as specified, replace the blower resistor.
4. REINSTALL BLOWER RESISTOR
H-4-2
ru;S12
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

N14295
AC2S9−01
−
AIR CONDITIONING THERMISTOR
AC−59
1386
Author: Date:
1996 LAND CRUISER (RM451U)
THERMISTOR
ON−VEHICLE INSPECTION
1. REMOVE GLOVE COMPARTMENT PARTS
(See page BO−76 )
2. INSPECT THERMISTOR RESISTANCE
Measure the resistance between terminals.
Standard resistance:
1,500 Ω at 25 ° C (77 °F)
If resistance is not as specified, replace the sensor.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

N16452
AC2SB−01
Z13470
Low Pressure Side
ON (Continuity)
196 kpa
(2.0 kgf·cm
2, 28 psi)
OFF (No Continuity) High Pressure Side
3,140 kpa
(32.0 kgf·cm2, 455 psi)
OFF (No Continuity)
−
AIR CONDITIONING PRESSURE SWITCH
AC−61
1388
Author: Date:
1996 LAND CRUISER (RM451U)
PRESSURE SWITCH
ON−VEHICLE INSPECTION
1. INSTALL MANIFOLD GAUGE SET
2. DISCONNECT CONNECTOR FROM PRESSURE
SWITCH
3. RUN ENGINE AT APPROX. 1,500 RPM
4. INSPECT PRESSURE SWITCH OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 2 and the negative ( −) lead to terminal 1.
(b) Check continuity between terminals when refrigerant pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
5. STOP ENGINE AND REMOVE MANIFOLD GAUGE
SET
6. CONNECT CONNECTOR TO PRESSURE SWITCH
~11L
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

Z19533
1
2
3
4
5 12
3
4
5
AC2SE−03
AC−64
−
AIR CONDITIONING HEATER MAIN RELAY
1391
Author: Date:
1996 LAND CRUISER (RM451U)
HEATER MAIN RELAY
INSPECTION
INSPECT HEATER MAIN RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 − 3
2 − 4Continuity
Apply B+ between
terminals 3 and 5.4 − 5Continuity
If continuity is not as specified, replace the relay.
BE1850 BElS44
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

Z09804
1
23
4
5
6
1
3
6 2
4
AC2SF−01
−
AIR CONDITIONING REAR HEATER RELAY
AC−65
1392
Author: Date:
1996 LAND CRUISER (RM451U)
REAR HEATER RELAY
INSPECTION
INSPECT REAR HEATER RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant2 − 6
1 − 3Continuity
Apply B+ between
terminals 2 and 6.1 − 4Continuity
If continuity is not as specified, replace the relay.
H-8-2BE1844
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010