2001 NISSAN PICK-UP Repair Manual

GHA044A
TROUBLE DIAGNOSESMANUAL
Wiring Diagram Ð A/C, M Ð/RHD Models
with KA, YD Engine (Cont'd)
HA-3011

Magnet Clutch
LHD models with KA, YD engine
SYMPTOM: Magnet clutch does not engage when A/C
switch and fan switch are ON.
CHECK POWER SUPPLY FOR COM-
PRESSOR.
Disconnect compressor harness connec-
tor.
Do approx. 12 volts exist between com-
pressor harness terminal No.
V1and body
ground?
No
cYes
Check the following.
+Magnet clutch coil
+Thermal protector (KA
engine except for the
Middle East)
Refer to HA-3019.
NG
Replace magnet clutch.
Refer to HA-69 in D22 Ser-
vice Manual, Publication
No. SM7E-0D22G1.
Note
Check circuit continuity between A/C relay
harness terminal No.
V5and compressor
harness terminal No.
V1.
Continuity should exist.
If OK, check harness for short.
OK
CHECK POWER SUPPLY FOR A/C
RELAY.
Do approx. 12 volts exist between A/C
relay harness terminal No.
V3and 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.)
CHECK POWER SUPPLY FOR A/C
RELAY.
Do approx. 12 volts exist between A/C
relay harness terminal No.
V2and 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.)
CHECK A/C RELAY AFTER DISCON-
NECTING IT.
Refer to HA-3019 .
OK
cNG
Replace A/C relay.
Reconnect A/C relay.
VA
(Go to next page.)
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
SHA616F
SHA617F
SHA596F
SHA597F
.
.
.
.
.
.
.
TROUBLE DIAGNOSESMANUAL
HA-3012

VA
NoteNote
CHECK COIL SIDE CIRCUIT OF A/C
RELAY.
Do approx. 12 volts exist between ECM
harness terminal No.
V11,V15orV23and
body ground?
Yes
cNo
Check circuit continuity
between A/C relay har-
ness terminal No.
V1and
ECM harness terminal No.
V11,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-21.)
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.
RHA335GE
SHA598FB
RHA338GA
RHA319GC
SHA102FA
.
.
.
.
.
.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont'd)
HA-3013

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-3014

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.
RHA328GC
RHA340GB
.
. .
.
.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont'd)
HA-3015

RHD models with KA, YD engine
SYMPTOM: Magnet clutch does not engage when A/C
switch and fan switch are ON.
CHECK POWER SUPPLY FOR COM-
PRESSOR.
Disconnect compressor harness connec-
tor.
Do approx. 12 volts exist between com-
pressor harness terminal No.
V1and body
ground?
No
cYes
Check the following.
+Magnet clutch coil
+Thermal protector (KA
and VG engines)
Refer to HA-21 in D22
SERVICE MANUAL,
Publication No. SM9E-
D22BG0.
NG
Replace magnet clutch.
Refer to HA-69 in D22 Ser-
vice Manual, Publication
No. SM7E-0D22G1.
Note
Check circuit continuity between A/C relay
harness terminal No.
V5and compressor
harness terminal No.
V1.
Continuity should exist.
If OK, check harness for short.
OK
CHECK POWER SUPPLY FOR A/C
RELAY.
Do approx. 12 volts exist between A/C
relay harness terminal No.
V3and 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.)
CHECK POWER SUPPLY FOR A/C
RELAY.
Do approx. 12 volts exist between A/C
relay harness terminal No.
V2and 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.)
CHECK A/C RELAY AFTER DISCON-
NECTING IT.
Refer to HA-3019.
OK
cNG
Replace A/C relay.
Reconnect A/C relay.
VA
(Go to next page.)
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
SHA618F
SHA619F
SHA596F
SHA597F
.
.
.
.
.
.
.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont'd)
HA-3016

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