1998 ISUZU TROOPER Service Repair Manual

Page 73 of 3573

ISUZU TROOPER 1998  Service Repair Manual 00 Ð 34 SERVICE INFORMATION
4JX1 ENGINE
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
4
13
24
1
A/C SW.
FAN SW.
I-23
PRESSURE
SW.
RELAY;
THERMO
B-2
C-25I-23
BATTERY
1
E-

Page 74 of 3573

ISUZU TROOPER 1998  Service Repair Manual 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 PROCED

Page 75 of 3573

ISUZU TROOPER 1998  Service Repair Manual 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

Page 76 of 3573

ISUZU TROOPER 1998  Service Repair Manual SERVICE INFORMATION  00 Ð 37
CONDENSER FAN
When the cycling switch, which controls the
condenser fan of the triple pressure switch while
the A/C switch is on, senses the refrigerant pressureand the c

Page 77 of 3573

ISUZU TROOPER 1998  Service Repair Manual 00 Ð 38 SERVICE INFORMATION
CONDENSER FAN DOES NOT RUN
YESNO
·DOES A/C SYSTEM OPERATE CORRECTLY?
·IS FL-4 (30A) FUSE OK?CHECK A/C SYSTEM AND REPAIR AS NECESSARY
YESNO
·IS CONDENSER FAN RELAY (X-19

Page 78 of 3573

ISUZU TROOPER 1998  Service Repair Manual SERVICE INFORMATION  00 Ð 39
·CHECK TO SEE IF CONTINUITY BETWEEN CHASSIS SIDE
RELAY TERMINAL NO. X19-3 AND CHASSIS SIDE
CONNECTOR TERMINAL NO. C75-1.
YESNO
OPEN CIRCUITPOOR GROUND OR OPEN CIRCUIT BE

Page 79 of 3573

ISUZU TROOPER 1998  Service Repair Manual 00 Ð 40 SERVICE INFORMATION
1. Defective rotor/piston 
2. Defective bearing (DKS-15CH) 
3. Defective shaft 
1. Defective bearing 
2. Defective clutch
3. Clearance between drive plate
and pulley not s

Page 80 of 3573

ISUZU TROOPER 1998  Service Repair Manual SERVICE INFORMATION  00 Ð 41
I-18 I-23
123456126
OFF
1
FAN SW. 2
3
4
OFF
A/C SW.
ON
FAN CONTROL KNOB (FAN SWITCH) AND A/C
SWITCH
INDIVIDUAL INSPECTION
Check for continuity between fan switch and A/C