fuse ISUZU TROOPER 1998 Service Repair Manual

00 Ð 6 SERVICE INFORMATION
6VD1/6VE1-(LHD)
0.5 LG
H - 2614
B - 2 BODY-LH
BODY-RH
FRAME
ENG.5B
BODY
8B / R
8 B
+
_
P - 6
30B
P - 1
P - 5
P - 10
P - 7
P - 2
FL-1
80A MAIN
I - 232
I - 23
I - 236
1A/C SW
BLOWER
MOTOR
0.3 G/Y
I-42 I-42
I-421 3
221 0.5LG
H-141
5W
B-190.5 BR
B
OFF ST
IG2
ACCSTARTER SWIG1
B2 1
4
2
5WFL-2
50A KEY SW
H-142
3W/B
B-11
0.5 BR
0.5 P/G H - 9
H - 51 19 1
H-1617
H-16 0.5LG
0.5 LG
0.5 LG
0.3G/Y
2 L/R
I-41
I - 18
I - 18
I - 18
I - 18 1.25 L/O
1.25 L/Y
0.85 L/W 3
36
5
2 4
1 6
FAN SW HEATER BEZEL
ILLUMINATION
I - 23 I - 23
I - 18
I - 183
5
4
10.5 R/G0.85 G/R
ILLUMINATION
CONTROLLER (3) FUSE F-12
H - 4815
2 B
2BLOWER
RESISTOR
I-41
I-41
I-41
I-41
2L/B
2 B
0.3G/Y
1.25B
M
B - 51
2
C-11 10A
AUDIO(ACC),MIRROR
B - 5
B-361
B-36
B-36 B-362
34
3L/B
0.5O/G
3L/R 3LC-19
25A BLOWER
0.5B
ELECTRONIC
THERMOSTAT
5W 3W
3W/B
3W/B
0.3 G/Y
1
RELAY ;
HEATER AND
A/C
C-20 10A
AIR CON.
0.5 BR
0.5 BR
B - 11B - 11
FL-4
30A CONDENSER FAN
F-1
15A RR COOLER1.25 L/O
0.5LG/Y
0.3 G/Y
D08RY00130

00 Ð 10 SERVICE INFORMATION
4JG2 (LHD)
0.5 LG
B - 2 BODY-LH
BODY-RH
FRAME
ENG.5B
BODY
8B / R
8 B
+
_
P - 6
30B
P - 1
P - 5
P - 10
P - 7
P - 2
FL-1
80A MAIN
I - 232
I - 23
I - 236
1A/C SW
BLOWER
MOTOR
0.3 G/Y
I - 42 I - 42
I - 421 3
221
0.5 LG
0.5LG
H-141
5W
B-190.5 BR
B
OFF ST
IG2
ACCSTARTER SWIG1
B2 1
4
2
5WFL-2
50A KEY SW
H-142
3W/B
B-11
0.5 P/G 19
H-1617
H - 161
H - 51 14
H - 26
0.5LG
0.5 LG
2 L/R
I - 41
I - 18
I - 18
I - 18
I - 18 1.25 L/O
1.25 L/Y
0.85 L/W 3
36
5
2 4
1 6
FAN SW HEATER BEZEL
ILLUMINATION
I - 23 I - 23
I - 18
I - 183
5
4
10.5 R/G0.85 G/R
ILLUMINATION
CONTROLLER (3) FUSE F-12
H - 4815
2 B
2BLOWER
RESISTOR
I - 41
I - 41
I - 41
I - 41
2L/B 2L/B
2 B
0.3G/Y1.25B
M
B - 51
2
C-11 10A
AUDIO(ACC),MIRROR
B - 5
4 H - 48
B-361
B-36
B-36 B-362
34
3L/B
0.5O/G
3L/R 3LC-19
25A BLOWER
0.5B
ELECTRONIC
THERMOSTAT
5W 3W
3W/B
3W/B
0.3 G/Y
1
RELAY ;
HEATER AND
A/C
C-20 10A
AIR CON.
0.5 BR
0.5 BR
0.5 BR
B - 11B - 11
FL-4
30A CONDENSER FAN
F-1
15A RR COOLER1.25 L/O
0.5LG/Y
H - 9
D08RY00126

00 Ð 18 SERVICE INFORMATION
BLOWER MOTOR DOES NOT RUN
·IS NO. C-19 (25A) FUSE OK?
·IS BLOWER RELAY (B-36) OK?
YESNO
REPLACE
NO
REPLACE
NO
REPLACE
NO
REPLACE CONTROL LEVER ASSEMBLY
NO
REPLACE
NO
OPEN CIRCUIT BETWEEN NO. C-19
(25A) FUSE AND NO. B5-1 (NO. B5-2;
RHD)
YES
·IS RESISTOR OK?
YES
·IS FAN CONTROL KNOB (FAN SWITCH) OK?
YES
·IS BLOWER MOTOR OK?
YES
·TURN THE IGNITION SWITCH ÒONÓ (ENGINE IS
RUNNING)
·FAN CONTROL KNOB (FAN SWITCH) ÒONÓ
·CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT
AT CHASSIS SIDE CONNECTOR TERMINAL NO. B5-1
(NO. B5-2; RHD)
YES
POOR GROUND OR OPEN CIRCUIT EITHER BETWEEN
CHASSIS SIDE CONNECTOR TERMINAL NO. B5-2
(NO. B5-1; RHD) AND NO. I-41-2 OR NO. I18-1 AND BODY
GROUND NO. B-2 (NO. B-1; RHD)

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?

SERVICE INFORMATION 00 Ð 29
·IS THE BATTERY VOLTAGE APPLIED AT HARNESS SIDE
CONNECTOR X5-2?REPAIR AN OPEN CIRCUIT.
YESNO
·IS THE A/C THERMO RELAY NORMAL?REPAIR AN OPEN CIRCUIT BETWEEN THE
FUSE C-20 AND X5-2.
YESNO
·DISCONNECT THE ELECTRONIC THERMOSTAT CONNEC-
TOR I42.
·IS THE BATTERY VOLTAGE APPLIED AT HARNESS SIDE
CONNECTOR I42-3?
YESNO
·IS THERE CONTINUITY BETWEEN HARNESS SIDE CON-
NECTOR X5-3 AND I42-1?REPAIR AN OPEN CIRCUIT BETWEEN I23-6
AND I42-3.
YESNO
·DISCONNECT THE PCM CONNECTORS.
·IS THERE CONTINUITY BETWEEN HARNESS SIDE CON-
NECTOR X5-4 AND PCM C3-E15?REPAIR AN OPEN CIRCUIT.
YESNO
·IS THERE CONTINUITY BETWEEN HARNESS SIDE CON-
NECTOR I42-2 AND THE GROUND?REPAIR AN OPEN CIRCUIT.
YESNO
·DISCONNECT THE A/C COMPRESSOR RELAY CONNEC-
TOR X7.
·IS THE BATTERY VOLTAGE APPLIED AT HARNESS SIDE
CONNECTOR X7-1 AND X7-2?REPLACE THE ELECTRONIC THERMOSTAT.
YESNO
·RECONNECT X5 AND I42.
·IS THE BATTERY VOLTAGE APPLIED AT HARNESS SIDE
CONNECTOR PCM C3-E15?REPAIR AN OPEN CIRCUIT.
REPLACE THE RELAY.

00 Ð 30 SERVICE INFORMATION
YESNO
REPAIR AN OPEN CIRCUIT BETWEEN THE
FUSE C-20 AND X7-1 (OR X7-2).·DIS CONNECT THE MAGNETIC CLUTCH CONNECTOR E3.
·CONNECT THE BATTERY WITH MAGNETIC CLUTCH SIDE
CONNECTOR E3-1.
·DOES THE MAGNETIC CLUTCH WORK?
YESNO
NO
REPAIR OR REPLACE THE MAGNETIC CLUTCH.·IS THERE CONTINUITY BETWEEN HARNESS SIDE CON-
NECTOR X7-4 AND E3-1?
YES
REPAIR AN OPEN CIRCUIT.
REPAIR AN OPEN CIRCUIT.
REPAIR AN OPEN CIRCUIT.
·IS THERE CONTINUITY BETWEEN HARNESS SIDE CON-
NECTOR X7-3 AND PCM C1-B14?
YESNO
NO
·IS THERE CONTINUITY BETWEEN HARNESS SIDE CON-
NECTOR X5-4 AND PCM C3-E15?
YES
REPLACE THE PCM.

00 Ð 32 SERVICE INFORMATION
MAGNETIC CLUTCH DOES NOT RUN
·ARE NO. C-20 (10A) FUSE AND NO. C-19 (25A) FUSES OK?
YESNO
REPLACE·ARE HEATER & A/C (B-36) AND THERMOSTAT (X-5)
RELAYS OK?
YESNO
REPLACE·IS PRESSURE SWITCH (DUAL PRESSURE SWITCH) OK?
YESNO
SWITCH DEFECTIVE OR INSUFFICIENT REFRIGERANT·ARE A/C SWITCH AND FAN CONTROL KNOB (FAN
SWITCH) OK?
YESNO
REPLACE·TURN THE IGNITION SWITCH ÒONÓ (ENGINE IS
RUNNING)
·A/C SWITCH AND FAN CONTROL KNOB (FAN SWITCH
ÒONÓ
·CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. E3-1
NOYES
MAGNETIC CLUTCH DEFECTIVE ·CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. C25-1
YESNO
OPEN CIRCUIT BETWEEN NO. C-20 (10A) FUSE AND
NO. C25-1·DISCONNECT THERMO RELAY (X-5)
·CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE RELAY TERMINAL NO. X5-2
YESNO
OPEN CIRCUIT BETWEEN NO. C25-2 AND NO. X5-2 ·CHECK TO SEE IF VOLTAGE (APPROX. 10V) IS PRESENT
CHASSIS SIDE RELAY TERMINAL NO. X5-1 AND
NO. X5-3
CONTINUED NEXT PAGE

SERVICE INFORMATION 00 Ð 33
CONTINUED PREVIOUS PAGE
NOYES
·CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE RELAY TERMINAL NO. X5-1OPEN CIRCUIT BETWEEN NO. X5-4 AND NO. E3-1
YESNO
·RECONNECT THERMO RELAY
·CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. I42-3
·CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. I23-2
NOYES
OPEN CIRCUIT BETWEEN
NO. C-20 (10A) FUSE AND
NO. I23-2OPEN CIRCUIT BETWEEN
X5-1 AND NO. I23-6NOYES
·CHECK TO SEE IF BATTERY VOLTAGE (APPROX. 10V)
IS PRESENT AT CHASSIS SIDE CONNECTOR TERMINAL
NO. I42-1
YESNO
·CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. I42-2OPEN CIRCUIT BETWEEN NO. X5-3 AND NO. I42-1
YESNO
·OPEN CIRCUIT BETWEEN NO. I42-2 AND NO. I18-4 OR
POOR GROUND (FAN SWITCH GROUND CIRCUIT)ELECTRO THERMO DEFECTIVE
OPEN CIRCUIT BETWEEN
NO. I23-6 AND NO. I42-3

SERVICE INFORMATION 00 Ð 35
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?

00 Ð 36 SERVICE INFORMATION
·IS THE BATTERY VOLTAGE APPLIED AT HARNESS SIDE
CONNECTOR X5-2?REPAIR AN OPEN CIRCUIT.
YESNO
·IS THE A/C THERMO RELAY NORMAL?REPAIR AN OPEN CIRCUIT BETWEEN THE
FUSE C-20 AND X5-2.
YESNO
·DISCONNECT THE ELECTRONIC THERMOSTAT CONNEC-
TOR I42.
·IS THE BATTERY VOLTAGE APPLIED AT HARNESS SIDE
CONNECTOR I42-3?
YESNO
·IS THERE CONTINUITY BETWEEN HARNESS SIDE CON-
NECTOR X5-3 AND I42-1?REPAIR AN OPEN CIRCUIT BETWEEN I23-6
AND I42-3.
YESNO
REPAIR AN OPEN CIRCUIT.
YESNO
·IS THERE CONTINUITY BETWEEN HARNESS SIDE CON-
NECTOR I42-2 AND THE GROUND?REPAIR AN OPEN CIRCUIT.
REPLACE THE RELAY.
·DIS CONNECT THE MAGNETIC CLUTCH CONNECTOR E27.
·CONNECT THE BATTERY WITH MAGNETIC CLUTCH SIDE
CONNECTOR E27-1.
·DOES THE MAGNETIC CLUTCH.
YESNO
REPAIR OR REPLACE THE MAGNETIC CLUTCH.·REPAIR AN OPEN CIRCUIT BETWEEN X5-4 AND E27-1.