2004 NISSAN PATROL Electronic Repair Manual

A/C System
TROUBLE DIAGNOSIS PROCEDURE FOR A/C SYSTEM
SYMPTOM:
+A/C system does not come on.
Inspection ¯ow
*1: HA-96 in Y61 SERVICE MANUAL,
Publication No. SM7E-2Y61G1*2: HA-4032
RHA379I
TROUBLE DIAGNOSESAUTO
HA-4034

Mode Door Motor
TROUBLE DIAGNOSIS PROCEDURE FOR MODE DOOR MOTOR (LAN)
SYMPTOM:
+Air outlet does not change.
+Mode door motor does not operate normally.
Inspection ¯ow
*1: HA-14*
*2: HA-4032
*3: HA-4027
*4: HA-4028
*5: HA-4029*6: HA-4030
*7: HA-125*
*8: HA-127*
*9: HA-129*
*10: HA-132**11: HA-101*
*12: HA-87*
*13: HA-99*
*14: HA-91*
*: Refer to Y61 SERVICE MANUAL, Publication No. SM7E-2Y61G1.
RHA380I
TROUBLE DIAGNOSESAUTO
HA-4035

Air Mix Door Motor
TROUBLE DIAGNOSIS PROCEDURE FOR AIR MIX DOOR (LAN)
SYMPTOM:
+Discharge air temperature does not change.
+Air mix door motor does not operate.
Inspection ¯ow
*1: HA-4027
*2: HA-4028
*3: HA-4027 see STEP 4
*4: HA-125**5: HA-127*
*6: HA-129*
*7: HA-132*
*8: HA-101**9: HA-91*
*10: HA-100*
*11: HA-103*
*12: HA-4032
*: Refer to Y61 SERVICE MANUAL, Publication No. SM7E-2Y61G1.
RHA381I
TROUBLE DIAGNOSESAUTO
HA-4036

Intake Door Motor
TROUBLE DIAGNOSIS PROCEDURE FOR INTAKE DOOR
SYMPTOM:
+Intake door does not change.
+Intake door motor does not operate normally.
Inspection ¯ow
*1: HA-4027
*2: HA-4028
*3: HA-4027 see STEP 4
*4: HA-125**5: HA-127*
*6: HA-129*
*7: HA-132*
*8: HA-101**9: HA-107*
*10: HA-106*
*11: HA-4032
*12: HA-91*
*: Refer to Y61 SERVICE MANUAL, Publication No. SM7E-2Y61G1.
RHA382I
TROUBLE DIAGNOSESAUTO
HA-4037

Blower Motor
TROUBLE DIAGNOSIS PROCEDURE FOR BLOWER MOTOR
SYMPTOM:
+Blower motor operation is malfunctioning.
+Blower motor operation is malfunctioning under out of starting fan speed control.
Inspection ¯ow
*1: HA-4027
*2: HA-4028
*3: HA-4030
*4: HA-111**5: HA-125*
*6: HA-127*
*7: HA-129**8: HA-132*
*9: HA-91*
*10: HA-4032
*: Refer to Y61 SERVICE MANUAL, Publication No. SM7E-2Y61G1.
RHA383I
TROUBLE DIAGNOSESAUTO
HA-4038

Magnet Clutch
TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH
SYMPTOM:
+Magnet clutch does not engage.
Inspection ¯ow
*1: HA-4027
*2: HA-4027 see STEP 2
*3: HA-4027 see STEP 4
*4: HA-4040: TB48 engine
HA-4043: TB45 engine
HA-4046: TD engine
HA-4049: ZD engine*5: HA-125 in Y61 SERVICE MANUAL,
publication No. SM7E-2Y61G1
*6: HA-132 in Y61 SERVICE MANUAL,
publication No. SM7E-2Y61G1
*7: HA-4032
*8: HA-91 in Y61 SERVICE MANUAL,
publication No. SM7E-2Y61G1*9: HA-43 in Y61 SERVICE MANUAL,
publication No. SM7E-2Y61G1
RHA384I
TROUBLE DIAGNOSESAUTO
HA-4039

DIAGNOSTIC PROCEDURE (TB48 ENGINE EXCEPT
FOR THE MIDDLE EAST)
SYMPTOM: Magnet clutch does not engage when A/C switch
and fan control dial are ON.
CHECK INTAKE SENSOR CIRCUIT.
Refer to self-diagnosis (HA-4027) and
intake sensor circuit (HA-132 in Y61 SER-
VICE MANUAL, publication No. SM7E-
2Y61G1.)
CHECK POWER SUPPLY FOR COM-
PRESSOR.
Disconnect compressor harness connector.
Do approx. 12 volts exist between compres-
sor harness connector terminal No.j
1and
ground?
No
cYe s
Check magnet clutch coil.
NG
Replace magnet clutch.
Refer to HA-178 in Y61
SERVICE MANUAL (publi-
cation No. SM7E-2Y61G1).
Disconnect A/C relay.
Note
CHECK CIRCUIT CONTINUITY
BETWEEN A/C RELAY HARNESS CON-
NECTOR TERMINAL NO.j
3AND COM-
PRESSOR HARNESS CONNECTOR TER-
MINAL NO.j
1.
Continuity should exist.
If OK, check harness for short.
OK
CHECK POWER SUPPLY FOR A/C
RELAY.
Disconnect A/C relay.
Do approx. 12 volts exist between A/C
relay harness connector terminal Nos.j
1,
j5and ground?
Ye s
cNo
Check power supply circuit
and 10A or 20A (No.
)
located in the fuse block
(J/B).
Refer to EL section (ªWiring
Diagramº, ªPOWER SUP-
PLY ROUTINGº).
CHECK A/C RELAY AFTER DISCON-
NECTING IT.
Refer to HA-41 in Y61 SERVICE MANUAL,
publication No. SM1E-Y61EG1.
OK
cNG
Replace A/C relay.
jA(Go to next page.)
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
RHA385I
SHA579F
SHA580FC
SHA581F
.
.
.
.
.
.
.
TROUBLE DIAGNOSESAUTO
Magnet Clutch (Cont'd)
HA-4040

jA
Reconnect A/C relay.
CHECK COIL SIDE CIRCUIT OF A/C
RELAY.
Do approx. 12 volts exist between ECM
harness connector terminal No.j
24and
ground?
Ye s
Ye s
cNo
Disconnect A/C relay.
Disconnect ECM harness
connector.
jB
(Go to next page.)
Note
CHECK CIRCUIT CONTI-
NUITY BETWEEN A/C
RELAY HARNESS CON-
NECTOR TERMINAL NO.
j
2AND ECM HARNESS
CONNECTOR TERMINAL
NO.j
24.
Continuity should exist.
If OK, check harness for
short.
M/T models A/T models
CHECK VOLTAGE FOR ECM.
Do approx. 12 volts exist between ECM
harness connector terminal No.j
86and
ground?
Ye s
cNo
CHECK ECM. Refer to EC
section.
Disconnect ECM harness connector.
Disconnect auto amp. harness connector.
Note
CHECK CIRCUIT CONTINUITY
BETWEEN ECM HARNESS CONNEC-
TOR TERMINAL NO.j
86AND AUTO AMP.
HARNESS CONNECTOR TERMINAL NO.
j
4.
Continuity should exist.
If OK, check harness for short.
OK
CHECK REFRIGERANT PRESSURE
SENSOR.
Refer to EC-498 (publication No.
SM2E-Y61FG1).
OK
cNG
Replace refrigerant pres-
sure sensor.
Replace auto amp.
Note:
If the result is NG or No after checking circuit continuity, repair harness
or connector.
SHA582FB
SHA583F
SHA584FB
RHA386I
.
.
.
.
.
.
.
.
.
TROUBLE DIAGNOSESAUTO
Magnet Clutch (Cont'd)
HA-4041