2004 NISSAN PATROL Electronic Repair Manual

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
15and
ground?
Ye s
cNo
Disconnect A/C relay.
Disconnect ECM harness
connector.
Note
CHECK CIRCUIT CONTI-
NUITY BETWEEN A/C
RELAY HARNESS CON-
NECTOR TERMINAL NO.
j
2AND ECM HARNESS
CONNECTOR TERMINAL
NO.j
15.
Continuity should exist.
If OK, check harness for
short.
CHECK VOLTAGE FOR ECM.
Do approx. 12 volts exist between ECM
harness connector terminal No.j
21and
ground?
Ye s
cNo
CHECK ECM. Refer to EC
section.
Disconnect ECM harness connector.
Disconnect dual-pressure switch harness
connector.
Note
CHECK CIRCUIT CONTINUITY
BETWEEN ECM HARNESS CONNEC-
TOR TERMINAL NO.j
21AND DUAL-
PRESSURE SWITCH HARNESS CON-
NECTOR TERMINAL NO.j
2.
Continuity should exist.
If OK, check harness for short.
OK
CHECK DUAL-PRESSURE SWITCH.
Refer to HA-119 in Y61 SERVICE
MANUAL, publication No. SM7E-2Y61G1.
OK
cNG
Replace dual-pressure
switch.
jB
Note:
If the result is NG or No after checking circuit continuity, repair harness
or connector.
RHA400I
RHA401I
RHA402I
RHA403I
.
.
.
.
.
.
.
.
TROUBLE DIAGNOSESAUTO
Magnet Clutch (Cont'd)
HA-4050

jB
Note
Check circuit continuity between dual-pres-
sure switch harness connector terminal No.
j
1and auto amp. harness connector ter-
minal No.j
4.
Continuity should exist.
If OK, check harness for short.
Ye s
Replace auto amp.
Note:
If the result is NG or No after checking circuit continuity, repair harness
or connector.
COMPONENT INSPECTION
A/C cut relay (TD engine models)
Check continuity between terminal Nos.j4andj3.
Conditions Continuity
12V direct current supply between
terminal Nos.j
2andj1No
No current supply Yes
If NG, replace relay.
Engine coolant temperature switch-2 (TD engine
models)
Check engine coolant temperature switch-2 for proper operation.
Operating temperature ÉC (ÉF) Operation
Increasing to 87 - 93 (189 - 199) OFF®ON
Decreasing to 82 - 84 (180 - 183) ON®OFF
OFF: Continuity does not exist.
ON: Continuity exists.
RHA227IA
RHA404I
.
.
TROUBLE DIAGNOSESAUTO
Magnet Clutch (Cont'd)
HA-4051

Insufficient Cooling
TROUBLE DIAGNOSIS PROCEDURE FOR INSUFFICIENT COOLING
SYMPTOM:
+Insufficient cooling.
Inspection ¯ow
*1: HA-4032
*2: HA-4027
*3: HA-4028
*4: HA-4030*5: HA-101*
*6: HA-41*
*7: HA-4031
*8: HA-100**9: HA-111*
*10: HA-4039
*11: HA-41*
*: Refer to Y61 SERVICE MANUAL, Publication No. SM7E-2Y61G1.
RHA405I
TROUBLE DIAGNOSESAUTO
HA-4052

Insufficient Heating
TROUBLE DIAGNOSIS PROCEDURE FOR INSUFFICIENT HEATING
SYMPTOM:
+Insufficient heating.
Inspection ¯ow
*1: HA-4032
*2: HA-4027
*3: HA-4028*4: HA-4030
*5: HA-100**6: HA-111*
*7: HA-4036
*: Refer to Y61 SERVICE MANUAL, Publication No. SM7E-2Y61G1.
RHA406I
TROUBLE DIAGNOSESAUTO
HA-4053

Self-diagnosis
TROUBLE DIAGNOSIS PROCEDURE FOR SELF-DIAGNOSIS
SYMPTOM:
+Self-diagnosis cannot be performed.
Inspection ¯ow
*1: HA-4032 *2: HA-96 in Y61 SERVICE MANUAL,
Publication No. SM7E-2Y61G1*3: HA-91 in Y61 SERVICE MANUAL,
Publication No. SM7E-2Y61G1
RHA407I
TROUBLE DIAGNOSESAUTO
HA-4054

Wiring Diagram Ð R/COOL Ð/LHD Models with
Front Auto A/C
THA206M
TROUBLE DIAGNOSESREAR COOLER
HA-4055

THA207M
TROUBLE DIAGNOSESREAR COOLER
Wiring Diagram Ð R/COOL Ð/LHD Models with
Front Auto A/C (Cont'd)
HA-4056

Wiring Diagram Ð R/COOL Ð/LHD Models with
Front Manual A/C Except for TB45E Engine
THA208M
TROUBLE DIAGNOSESREAR COOLER
HA-4057