Isuzu N-Series. Manual — part 49
SERVICE INFORMATION 00-27
N1A0127E
00-28 SERVICE INFORMATION
Compressor Troubleshooting
ITEM
TROUBLE
POSSIBLE CAUSE
CORRECTION
1
Noise from compressor
1. Defective Piston
2. Defective bearing
3. Defective shaft
Replace cylinder and shaft assembly
Replace cylinder and shaft assembly
Replace cylinder and shaft assembly
2
Noise from magnetic
clutch face
1. Defective bearing
2. Defective clutch
3. Clearance between drive plate
and pulley is not standard
Replace magnetic clutch
Replace magnetic clutch
Adjust the clearance or replace mag-
netic clutch
3
Insufficient cooling
1. Defective gasket
2. Defective reed valve
3. Defective suction valve
Replace gasket
Replace valve plate
Replace suction valve
4
Not rotating
1. Defective piston
2. Defective shaft
3. Rotating parts seized due to in-
sufficient oil
Replace cylinder and shaft assembly
Replace cylinder and shaft assembly
Replace compressor
5
Oil and/or gas leakage
1. Defective seal
2. Defective O-ring
Replace shaft seal
Replace
SERVICE INFORMATION 00-29
Individual Inspection
Blower Motor
1. Disconnect the blower motor connector from the
blower motor.
2. Connect the battery positive terminal to the No. 1
(No. 2; RHD) terminal of the blower motor and neg-
ative to the No. 2 (No. 1, RHD).
3. Be sure to check to see if the blower motor oper-
ates correctly.
Resistor
1. Disconnect resistor connector.
2. Check for continuity and resistance between the
terminals of the resistor.
Except Taiwan
For Taiwan
Fan Switch
Check for continuity between fan switch and A/C switch
side connector terminals.
Legend
1. SW position
2. Terminal No.
3. Resistance value
N1A0005E
1
4
3
2
1
2
3
4
1
9.3
24V
4.0
1.2
1
4
2
3
2
2
4
3
3
1
1
N1A0132E
N1A0006E
N1A0007E
00-30 SERVICE INFORMATION
Heater & A/C and A/C Thermo Relay
Check for continuity between relay side connector termi-
nal.
3 — 5 --- Continuity
1 — 5 --- No Continuity
When battery voltage is applied between 2 — 4
3 — 5 --- No Continuity
1 — 5 --- Continuity
A/C Switch
Check for continuity between A/C switch side connector
terminals.
Magnetic Clutch
1. Disconnect the magnetic clutch harness connec-
tors.
2. Apply battery voltage to the clutch side connector
terminal, check to see if the magnetic clutch is at-
tracted to the pulley.
Pressure Switch
Disconnect the connector and check for continuity be-
tween pressure switch side connector terminal.
For GCC
N1A0008E
N1A0009E
Terminal No.
Control
Continuity
1 — 2
Magnetic CIutch
Continuity
N1A0010E
2
1
N1A0011E
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