1998 ISUZU TROOPER clutch

SERVICE INFORMATION 00 Ð 7
D08RY00131
0.5BR/Y
5
0.5BR/Y
H - 415
H-15
1
1
H-31
2
H-50 7
C-39
X - 5 X - 5
X - 5 X - 5
14 RELAY ;
A/C THERMO32
H-416 0.5 P/G
0.5 BR 0.5 G/O
0.5 BR
0.5 LG/Y 0.5 BR
0.5 BR
0.5 BR
X - 7 X - 7
X - 7 X - 7
43 21
H - 417
H - 69
E - 31
0.5BR/Y
0.5G/B
0.5B
0.5B 3 B 0.5LG/B0.5LG/B 0.5LG/B
R - 3
BODY-RR
PCM (B14)
PCM (E15)
X - 6 X - 6
X - 6
H-50
RR COOLER
CONNECTOR X - 6
RELAY ; RR COOLER
12
RELAY;
A/C COMPRESSOR MAGNETIC CLUTCH
0.5G/W
0.5G/W
0.5G/W
H-51
0.5 BR
C - 25 C - 25DUAL PRESSURE SW
or
TRIPLE SW
2H-4112 1H-514
X-19X-19
53 34
C-25
3
TRIPLE SW
4
H-51
0.5 W/R3
H-42
0.5 W/R2
0.5 W/R4
X-191
X-19
C-75
1.25L
1
H - 1217
0.3G/Y
M
2C-75
1.25B
(IF EQUIPPED)
RELAY; CONDENSER FAN CONDENSER FAN
1.25 L/O
C-25
C-39 FENDER-RH2
0.3 G/Y
0.5 LG 0.5 LG2

00 Ð 8 SERVICE INFORMATION
4JG2 (RHD)
C-69
FENDER-LHB-1 BODY-RH
BODY-LH
FRAME
ENG.5B
BODY
8B / R
8 B
+
_
P - 6
30B
P - 1
P - 5
P - 10
P - 7
P - 2
FL-1
80A MAINFL-4 30A
CONDENSER FAN
F-6 10A
RR COOLER
1
2 I-232
I-23
I-236
1A/C SW
BLOWER
MOTOR
0.5G/O
I-42 I-42
I-421 3
216
0.5
G/W 0.5 LG
C-25
C-25
0.5LGH-141
5W
B-190.5 BR
0.5BR
X-5 X-5
X-5 X-5
34 RELAY ;
A/C THERMO1
2
0.5 P/G 0.5 P/G
H-41100.5
G/W0.5
G/W
0.5 BR0.5
BR0.5
LG
PRESSURE SW
(CONDENSER) H-2413
0.5 LG
H-16 0.5LG
0.3GY
H-416
H-51
E-31
0.5 G/O
2L/R
I-41
I-18
I-18
I-18
I-18 1.25L/O
1.25L/Y
0.85L/W 3
36
5
2 4
1 6
FAN SW HEATER BEZEL
ILLUMINATION
I-23 I-23
I-18
I-18 3
5
4
10.3 R/G0.85 G/R
ILLUMINATION
CONTROLLER (3)RELAY ; TAIL (4)
H-201 2
BLOWER
RESISTOR
I-41
I-41
I-41
I-41
2L/B
2 B
1.25B
M
B-52
1B-5
B-361
B-36
B-36 B-362
34
3L/R 3LC-19
25A BLOWERRELAY ;
HEATER AND
A/C
0.3B
ELECTRONIC
THERMOSTAT
MAGNETIC CLUTCH
0.5G/O
5W 3W
0.5 BR 1.25 L/O
0.5 LG/Y
2B
C-20 10A
AIR CON.
0.5BR
7H-16
0.3G/Y
0.3G/Y0.3G/Y5W
0.85W/G
RELAY ; CHARGE (1)
H-1310
2
H-202L/B
VSV; FICD
C-69
2 1
0.5G/O 0.5 G/O
C-167
0.5 B
H-2616
H-514
H-511
D08RY00124

SERVICE INFORMATION 00 Ð 11
D08RY00127
5H-15
1
1
H-31
2
H-50 2
C-39
X - 5 X - 5
X - 5 X - 5
34 RELAY ;
A/C THERMO12
H-416 0.5 P/G
0.5 BR 0.5 G/O 0.5 G/O
0.5 G/O
0.5 G/O
0.5 LG/Y 0.5 BR
H - 51
E - 3
C-16 1
0.5B
0.5B 3 B 0.5LG/B0.5LG/B 0.5LG/B
R - 3
BODY-RR
X - 6 X - 6
X - 6
H-50
RR COOLER
CONNECTOR X - 6
RELAY ; RR COOLER
12
MAGNET CLUTCH
0.5G/W
0.5G/W
0.5G/W
H-51
0.5 BR
C - 25 C - 25DUAL PRESSURE SW
or
TRIPLE SW
2H-4110 1H-514
X-19X-19
53 3
3
0.5B
C-69
C-69
VSV;FICD
1
24
C-25
3
TRIPLE SW
4
H-51
0.5 W/R3
H-42
0.5 W/R2
0.5 W/R4
X-191
X-19
C-75
1.25L
1
0.3B
M
2C-75
1.25B
(IF EQUIPPED)
RELAY; CONDENSER FAN CONDENSER FAN
1.25 L/O
C-25
C-39 FENDER-RH2
0.5 LG 0.5 LG2

00 Ð 12 SERVICE INFORMATION
4JX1 (RHD)
B-2 BODY-RH
BODY-LH
5B
8B / R
8 B
+
_
P - 6
BODY
30B
P - 1
P - 5
P - 10
P - 7
ENG.
FRAME
P - 2
FL-1
80A MAIN
I-232
I-23
I-236
1A/C SW
BLOWER
MOTORI-42 I-42
I-421 3
216
0.5 LG 0.5 LG0.5 LG
0.5LG1
2
C-25
C-25
H-141
5W
B-19
0.5BR
X-5 X-5
X-5 X-5
34 A/C THERMO
RELAY12
0.5 P/G 0.5 P/GPRESSURE SW
(CONDENSER)THRMO SW
RELAYH-16
E-271
2L/R
I-41
I-18
I-18
I-18
I-18 1.25L/O
1.25L/Y
0.85L/W 3
36
5
2 4
1 6
FAN SW HEATER BEZEL
ILLUMINATION
I-23 I-23
I-18
I-18 3
5
4
10.3 R/G0.85 G/R
TAIL RELAY (4)
H-201
2BLOWER
RESISTOR
I-41
I-41
I-41
I-41
2L/B
2 B
0.3G/Y
1.25B
M
B-52
1B-5
B-361
B-36
B-36 B-362
343L/R 3L
C-19
25A BLOWERHEATER &
A/C RELAY
0.3B
ELECTRONIC
THERMOSTAT
MAGNETIC
CLUTCH
5W 3W
X-12 X-12
X-12 X-12
34 12
B-44
B-441
H-1511
2
0.5
G/W 0.3
G/YECM
(JI-31)
0.5
Y/G
B-491
B-49
2
0.3G/Y
DIODE
FULL HOT
SW
H-1315
CERAMIC
HEATER
B-48
B-482 1
CERAMIC HEATER
RELAY
2B
0.5G/B FL-3
40A C/HEATER
3W/L
2B
3W/G 3W/G
0.5BR
C-20 10A
AIR CON.
0.5BR
0.5 BR7H-16
0.3G/Y
0.3G/Y0.3G/Y5W
0.85W/G
CHARGE
RELAY(1)
H-1310
2
H-202L/B
0.5G/O 0.5G/O 0.5G/O
0.5G/O
H-268
0.5 G/W
0.5 G/Y 0.5 G/B
ECM
(J1-23)
H-4112
0.5 G/W
H-417
H-62
H-174
H-41 5
X-21 X-21
X-21 X-21
43 21H-2413H-2616
ILLUMINATION
CONTROLLER
D08RY00132

00 Ð 14 SERVICE INFORMATION
4JX1 (LHD)
B-2 BODY-LH
BODY-RH
5B
8B / R
8 B
+
_
P - 6
BODY
30B
P - 1
P - 5
P - 10
P - 7
ENG.
FRAME
P - 2
FL-1
80A MAIN
I-232
I-23
I-236
1A/C SW
BLOWER
MOTORI-42 I-42
I-421 3
216
0.5 LG 0.5 LG0.5 LG
0.5LG1
2
C-25
C-25
H-141
5W
B-19
0.5BR
X-5 X-5
X-5 X-5
34 A/C THERMO
RELAYTHERMO
SW
RELAY
12
0.5 P/G 0.5 P/GPRESSURE SW
(CONDENSER)H-13
E-271
2L/R
I-41
I-18
I-18
I-18
I-18 1.25L/O
1.25L/Y
0.85L/W 3
36
5
2 4
1 6
FAN SW HEATER BEZEL
ILLUMINATION
I-23 I-23
I-18
I-18 3
5
4
10.3 R/G0.85 G/R
TAIL RELAY (4)
H-4815
2BLOWER
RESISTOR
I-41
I-41
I-41
I-41
2L/B
2 B
0.3G/Y
1.25B
M
B-51
2B-5
B-361
B-36
B-36 B-362
343L/R 3L
C-19
25A BLOWERHEATER &
A/C RELAY
0.5B
ELECTRONIC
THERMOSTAT
MAGNETIC
CLUTCH
5W 3W
X-12 X-12
X-12 X-12
34 12
B-44
B-441
H-1214
2
0.3
G/W ECM
(JI-31)
0.5
Y/G
B-491
B-49
2
0.3G/Y
DIODE
FULL HOT
SW
H-135
CERAMIC
HEATER
B-48
B-48
2 1
CERAMIC HEATER
RELAY
2B
0.5G/B FL-3
40A C/HEATER
3W/L
2B
3W/G 3W/G
0.5BR
C-20 10A
AIR CON.
0.5BR
0.5 BR17H-16
0.3G/Y
0.3G/Y0.3G/Y5W
0.5O/G
STARTER SW
(ACC)
4
H-482L/B
0.5G/O 0.5G/O 0.5G/O
0.5G/O
H-2610
0.5 G/W
0.5 G/Y 0.5 G/B
ECM
(J1-23)
H-4112
0.5 G/W
H-417
H-62
H-174
H-41 5
X-21 X-21
X-21 X-21
43 21H-919H-2614
ILLUMINATION
CONTROLLER
D08RY00134

SERVICE INFORMATION 00 Ð 23
AIR CONDITIONING CYCLE TROUBLESHOOTING
No cooling or insuffi-
cient cooling
Insufficient velocity
of cooling air1. Magnetic clutch does not run
2. Compressor is not rotating properly
·Drive belt loosened or broken
·Magnetic clutch face is not
clean and slips
·Incorrect clearance between
magnetic drive plate and pulley
·Compressor oil leaks from shaft
seal or shell
·Compressor seized
3. Insufficient or excessive charge of
refrigerant
4. Leaks in the refrigerant system
5. Condenser clogged or insufficient
radiation
6. Temperature control link unit of the
heater unit defective
7. Unsteady operation due to foreign
substance in expansion valve
8. Poor operation of electronic thermo-
stat
1. Evaporator clogged or frosted
2. Air leaking from cooling unit or air
duct
3. Blower motor does not rotate prop-
erly·Refer to ÒMAGNETIC CLUTCHÓ
troubleshooting
·Adjust the drive belt to the specified
tension or replace the drive belt
·Clean the magnetic clutch face or
replace
·Adjust the clearance (Refer to
Section 1D ÒCOMPRESSOR OVER-
HAULÓ
·Replace the compressor
·Replace the compressor
·Discharge and recover refrigerant.
Recharge to specified amount.
·Check refrigerant system for leaks
and repair as necessary
Discharge and recover refrigerant.
Recharge to specified amount.
·Clean the condenser or replace as
necessary
·Check radiator or condenser fan
function
·Repair the link unit
·Replace the expansion valve
·Check electronic thermostat and
replace as necessary
·Check evaporator core and replace
or clean the core
·Check evaporator and duct connec-
tion, then repair as necessary
·Refer to Section 00 for ÒFAN
CONTROL KNOB (FAN SWITCH)Ó
troubleshooting
* For the execution of the charging and discharging operation in the table above, refer to the ÒRECOVERY,
RECYCLING, EVACUATING AND CHARGINGÓ in section 1B.
TROUBLEPOSSIBLE CAUSECORRECTION

SERVICE INFORMATION 00 Ð 27
MAGNETIC CLUTCH
When the A/C switch and the fan control knob (fan
switch) are turned on with the engine running,
current flows through the thermostat and the com-
pressor relay to activate the magnetic clutch.
The air conditioning can be stopped by turning off
the A/C switch or the fan control knob (fan switch).
However, even when the air conditioning is in oper-ation, the electronic thermostat, the pressure switch
or the PCM (6VD1/6VE1 Engine) is used to stop the
air conditioning temporarily by turning off the mag-
netic clutch in the prearranged conditions to reduce
the engine load which is being caused by the rise in
the engine coolant temperature, and the accelera-
tion of the vehicle, etc.
123
45 6
RELAY; A/C
B-36C-20
10A
A/C FL-1
80A
MAIN
1
2
B-2
C-25
2
4
X-5
1
3 (3)
(1)
4
13
24
1
A/C SW.
FAN SW.
I-23
PRESSURE
SW.
RELAY;
THERMOSTAT
B-2
X-7 C-25
C-1C-3E-3I-23
BATTERY
X-7
RELAY: A/C
COMPRESSOR
1
E-3
MAGNETIC
CLUTCHMg
OFF
I-18
2
6
1
321123
12
3412
11
213
5 46
I-18
X-5
B-1(LHD) (RHD)
B-1
1
2 34
W/ CONDENSER
FAN
2
4
1
3
C-3PCM (E15)
C-1PCM (B14)
3
1
2
ELECTRONIC
THERMOSTAT
I-42
I-42B-36
Pin number with ( ); RHD
A1 A2 A3 A4 A5 A6 A7 A8 A9A10 A11 A12 A13 A14 A15 A16B1 B2 B3 B4 B5 B6 B7 B8 B9B10 B11 B12 B13 B14 B15 B16E1 E2 E3 E4 E5 E6 E7 E8 E9E10 E11 E12 E13 E14 E15 E16F1 F2 F3 F4 F5 F6 F7 F8 F9F10 F11 F12 F13 F14 F15 F16
6VD1/6VE1 ENGINE
D08RY00295

00 Ð 28 SERVICE INFORMATION
MAGNETIC CLUTCH DOES NOT RUN
·TURN THE STARTER SWITCH ON AND START THE
ENGINE.
·TURN THE FAN SWITCH ON.
·DOES THE BLOWER MOTOR RUN?
YESNO
REFER TO THE DIAGNOSIS PROCEDURE FOR
ÒBLOWER MOTOR DOES NOT RUNÓ.·IS THE FUSE C-20 (10A) NORMAL?
YESNO
REPLACE THE FUSE.·DISCONNECT THE A/C SWITCH CONNECTOR AND
REMOVE THE A/C SWITCH.
·IS THE A/C SWITCH NORMAL?
YESNO
YESNO
REPAIR AN OPEN CIRCUIT BETWEEN THE
FUSE C-20 AND I23-2.·REINSTALL THE A/C SWITCH AND DISCONNECT THE DUAL
PRESSURE SWITCH (OR TRIPLE PRESSURE SWITCH) CON-
NECTOR C25.
·TURN THE A/C SWITCH ON.
·IS THE BATTERY VOLTAGE APPLIED AT HARNESS SIDE
CONNECTOR C25-1?
YESNO
REPLACE THE SWITCH.·RECONNECT THE CONNECTOR C25 AND DISCONNECT THE
A/C THERMO RELAY CONNECTOR X5.
·IS THERE CONTINUITY BETWEEN HARNESS SIDE CONNEC-
TOR C25-2 AND X5-1?
YESNO
REPAIR AN OPEN CIRCUIT BETWEEN I23-6
AND C25-1.·IS THE DUAL PRESSURE SWITCH (OR TRIPLE PRESSURE
SWITCH) NORMAL?
YESNO
REPAIR OR REPLACE THE SWITCH.·IS THE BATTERY VOLTAGE APPLIED AT HARNESS SIDE
CONNECTOR I23-2?