NISSAN PICK-UP 2001 Repair Manual

VA
NoteNote
CHECK COIL SIDE CIRCUIT OF A/C
RELAY.
Do approx. 12 volts exist between ECM
harness terminal No.
V9,V15orV23and
body ground?
Yes
cNo
Check circuit continuity
between A/C relay har-
ness terminal No.
V1and
ECM harness terminal No.
V9,V15orV23.
Continuity should exist.
If OK, check harness for
short.
Note
CHECK VOLTAGE FOR THERMO CON-
TROL AMP.
Do approx. 12 volts exist between thermo
control amp. harness terminal No.
V3
and body ground?
Yes
cNoVC(Go to HA-25.)
CHECK POWER SUPPLY FOR
THERMO CONTROL AMP.
Do approx. 12 volts exist between thermo
control amp. harness terminal No.
V1
and body ground?
Yes
cNo
Check power supply circuit
and 10A fuse (No.
13,
located in the fuse block.)
(Refer to ªPOWER SUP-
PLY ROUTINGº in EL sec-
tion and Wiring Diagram.)
Note
Check circuit continuity between thermo
control amp. harness terminal No.
V2
and body ground.
Continuity should exist.
If OK, check harness for short.
NG
cOK
Replace thermo control
amp.
Note
Check circuit continuity between thermo
control amp. harness terminal No.
V2
and A/C switch harness terminal No.V13.
Continuity should exist.
If OK, check harness for short.
OK
VB
(Go to next page.)
Note:
If the result is NG or No after checking circuit continuity,
repair harness or connector.
RHA335GD
SHA598FA
RHA338GA
RHA319GC
SHA102FA
.
.
.
.
.
.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont'd)
HA-3017

VB
CHECK A/C SWITCH.
Refer to HA-21 in D22 SERVICE
MANUAL, Publication No. SM9E-
D22BG0.
OK
cNG
Replace A/C switch.
Note
Check circuit continuity between A/C
switch harness terminal No.
V12and fan
switch harness terminal No.
V25.
Continuity should exist.
If OK, check harness for short.
OK
CHECK FAN SWITCH
Refer to HA-21 in D22 SERVICE
MANUAL, Publication No. SM9E-
D22BG0.
OK
cNG
Replace fan switch.
Note
Check circuit continuity between fan
switch harness terminal No.
V26and body
ground.
Continuity should exist.
If OK, check harness for short.
Note:
If the result is NG or No after checking circuit continuity,
repair harness or connector.
RHA465H
RHA466HA
RHA322GA
.
.
.
.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont'd)
HA-3018

VC
Note
Check circuit continuity between thermo
control amp. harness terminal No.
V3
and triple-pressure switch harness termi-
nal No.
V1.
Continuity should exist.
If OK, check harness for short.
OK
CHECK TRIPLE-PRESSURE SWITCH.
Refer to HA-22 in D22 SERVICE
MANUAL, Publication No. SM9E-
D22BG0.
OK
cNG
Replace triple-pressure
switch.
Note
Check circuit continuity between triple-
pressure switch harness terminal No.
V4
and ECM harness terminal No.V21orV46.
Continuity should exist.
If OK, check harness for short.
OK
Replace ECM.
Note:
If the result is NG or No after checking circuit continuity,
repair harness or connector.
ELECTRICAL COMPONENT INSPECTION
A/C Relay
Check continuity between terminal Nos. 3 and 5.
Conditions Continuity
12V direct current supply between
terminal Nos. 1 and 2Yes
No current supply No
If NG, replace relay.
RHA328GC
RHA340GC
RHA638H
.
. .
.
.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont'd)
HA-3019

Circuit Diagram Ð A/C, A Ð
GHA045A
TROUBLE DIAGNOSESAUTO
HA-3020

Wiring Diagram Ð A/C, A Ð
GHA046A
TROUBLE DIAGNOSESAUTO
HA-3021

GHA047A
TROUBLE DIAGNOSESAUTO
Wiring Diagram Ð A/C, A Ð (Cont'd)
HA-3022

GHA048A
TROUBLE DIAGNOSESAUTO
Wiring Diagram Ð A/C, A Ð (Cont'd)
HA-3023

GHA049A
TROUBLE DIAGNOSESAUTO
Wiring Diagram Ð A/C, A Ð (Cont'd)
HA-3024

GHA050A
TROUBLE DIAGNOSESAUTO
Wiring Diagram Ð A/C, A Ð (Cont'd)
HA-3025

Magnet Clutch
TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH
SYMPTOM:
+Magnet clutch does not engage.
Inspection flow
*1: HA-2035
*2: HA-2036
*3: HA-2038
*4: HA-2040
*5: HA-2080*6: HA-2082
*7: HA-2084
*8: HA-2087
*9: HA-2052
*10: HA-2041*11: HA-3027
*12: HA-27 in D22 Service
Manual, Publication No.
SM8E-0D22E0E
Note: *1 - *10: Refer to D22 SERVICE MANUAL, Publication No. SM9E-D22BE0E.
SHA341FA
TROUBLE DIAGNOSESAUTO
HA-3026