1998 NISSAN PATROL wiring

INCIDENTFlow chart
No.
1 Fan fails to rotate.
2 Fan does not rotate at 1-speed.
3 Fan does not rotate at 2-speed.
4 Fan does not rotate at 3-speed.
5 Fan does not rotate at 4-speed.
DIAGNOSTIC PROCEDURE
SYMPTOM: Blower motor does not rotate.
+Perform PRELIMINARY CHECK 1 before referring to the
following ¯ow chart.
Check if blower motor rotates properly
at each fan speed.
Conduct checks as per ¯ow chart at
left.
cjE
cjD
cjC
cjB
(Go to next page.)
CHECK POWER SUPPLY FOR BLOWER
MOTOR.
Disconnect blower motor harness connec-
tor.
Do approx. 12 volts exist between blower
motor harness terminal No.j
2and body
ground?
Ye s
cNo
Check 15A (No.and
No.) fuses at fuse
block.
(Refer to ``POWER SUP-
PLY ROUTING'' in EL sec-
tion and Wiring Diagram.)
1. Turn fan control knob to any position
except OFF.
2. Check circuit continuity between blower
motor harness terminal No.j
1and body
ground.
Continuity should exist.
OK
cNG
Reconnect blower motor
harness connector.
CHECK BLOWER MOTOR.
(Refer to Electrical Components Inspec-
tion.) (HA-31)
NG
Replace blower motor.
.
CHECK BLOWER MOTOR CIRCUIT
BETWEEN BLOWER MOTOR AND
RESISTOR.
Do approx. 12 volts exist between resistor
harness terminal No.j
4and body ground?
Ye s
cNo
Disconnect blower motor
and resistor harness con-
nectors.
Disconnect fan switch harness connector.Note
Check circuit continuity
between blower motor har-
ness terminal No.j
1and
resistor harness terminal
No.j
4.
Continuity should exist.
If OK, check harness for
short.
jA(Go to next page.)
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
RHA596G
RHA597G
RHA598G
RHA599G
.
.
.
.
..
.
TROUBLE DIAGNOSESMANUAL
Blower Motor (Cont'd)
HA-29

DIAGNOSTIC PROCEDURE
SYMPTOM: Magnet clutch does not engage when A/C switch
and fan switch are ON.
CHECK POWER SUPPLY FOR COM-
PRESSOR.
Disconnect compressor harness connector.
Do approx. 12 volts exist between compres-
sor harness terminal No.j
1and body
ground?
No
cYe s
Check magnet clutch coil.
NG
Replace magnet clutch.
Refer to HA-123.
Disconnect A/C relay.
Note
CHECK CIRCUIT CONTINUITY
BETWEEN A/C RELAY HARNESS TERMI-
NAL NO.j
7AND COMPRESSOR HAR-
NESS TERMINAL NO.j1.
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 terminal Nos.j
1,j6and
body ground?
Ye s
cNo
CHECK POWER SUPPLY
CIRCUIT AND 10A (No.
) FUSES AT FUSE
BLOCK.
Refer to EL section (``Wiring
Diagram'', ``POWER SUP-
PLY ROUTING'').
CHECK A/C RELAY AFTER DISCON-
NECTING IT.
Refer to HA-47.
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.
RHA747FE
RHA607GA
RHA608G
.
.
.
.
.
.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont'd)
HA-44

jB
CHECK POWER SUPPLY FOR THERMO
CONTROL AMP.
Disconnect thermo control amp. harness
connector.
Do approx. 12 volts exist between thermo
control amp. harness terminal No.j
1and
body ground?
Ye s
cNo
CHECK POWER SUPPLY
CIRCUIT AND 10A FUSES
AT FUSE BLOCK.
Refer to EL section (``Wiring
Diagram'', ``POWER SUP-
PLY ROUTING'').
CHECK BODY GROUND CIRCUIT FOR
THERMO CONTROL AMP.
Turn A/C switch ON.
Does continuity exist between thermo
control amp. harness terminalj
2and
body ground?
Ye s
cNo
CHECK THERMO CON-
TROL AMP.
Refer to HA-47.
Disconnect A/C switch harness connector.
CHECK A/C SWITCH.
Refer to HA-47.
OK
cNG
Replace A/C switch.
Disconnect fan switch harness connector.
Note
CHECK CIRCUIT CONTINUITY
BETWEEN A/C SWITCH HARNESS
TERMINAL NO.j
2AND FAN SWITCH
HARNESS TERMINAL NO.j
6.
Continuity should exist.
If OK, check harness for short.
OK
Note
CHECK BODY GROUND CIRCUIT FOR
FAN SWITCH.
Does continuity exist between fan switch
harness terminal No.j
5and body
ground?
Ye s
CHECK FAN SWITCH.
Refer to HA-31.
cNG
Replace fan switch.
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
RHA615G
RHA616G
RHA613G
RHA614G
.
.
.
.
.
.
.
.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont'd)
HA-46

Wiring Diagram Ð A/C, A Ð
YHA159
TROUBLE DIAGNOSESAUTO
HA-58

YHA160
TROUBLE DIAGNOSESAUTO
Wiring Diagram Ð A/C, A Ð (Cont'd)
HA-59

YHA161
TROUBLE DIAGNOSESAUTO
Wiring Diagram Ð A/C, A Ð (Cont'd)
HA-60

jA
Disconnect auto amp. and fan control amp.
harness connector.
Note
Does continuity exist between auto amp.
harness terminal No.j
17and fan control
amp. harness terminal No.j
2?
Continuity should exist.
If OK, check harness for short.
Ye s
CHECK FAN FEED BACK CIRCUIT.
Do approx. 12 volts exist between auto
amp. harness terminal No.j
20and body
ground?
Ye s
cNo
Check power supply circuit
and 15A fuses (No.
1
and2, located in the fuse
block).
Refer to EL section (``Wiring
Diagram'', ``POWER SUP-
PLY ROUTING'').
Note
Do approx. 12 volts exist between auto
amp. harness terminal No.j
18and body
ground?
Ye s
cNo
Check circuit continuity
between blower motor har-
ness terminal No.j
1and
auto amp. harness terminal
No.j
18.
Continuity should exist.
If OK, check harness for
short.
Replace auto amp.
Note:
If the result is NG or No after checking circuit continuity, repair harness
or connector.
RHA647G
RHA648G
RHA649G
RHA650G
RHA651G
.
.
.
.
.
TROUBLE DIAGNOSESAUTO
Blower Motor (Cont'd)
HA-90

DIAGNOSTIC PROCEDURE
SYMPTOM: Magnet clutch does not engage when A/C switch
and fan switch are ON.
CHECK POWER SUPPLY FOR COM-
PRESSOR.
Disconnect compressor harness connector.
Do approx. 12 volts exist between compres-
sor harness terminal No.j
1and body
ground?
No
cYe s
Check magnet clutch coil.
NG
Replace magnet clutch.
Refer to HA-123.
Disconnect A/C relay.
Note
CHECK CIRCUIT CONTINUITY
BETWEEN A/C RELAY HARNESS TERMI-
NAL NO.j
7AND COMPRESSOR HAR-
NESS TERMINAL NO.j1.
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 terminal Nos.j
1,j6and
body ground?
Ye s
cNo
CHECK POWER SUPPLY
CIRCUIT AND 10A (No.
) FUSE AT FUSE
BLOCK.
Refer to EL section (``Wiring
Diagram'', ``POWER SUP-
PLY ROUTING'').
CHECK A/C RELAY AFTER DISCON-
NECTING IT.
Refer to HA-97.
OK OK
ECCS
engine
modelsExcept for
ECCS
engine
models
cNG
Replace A/C relay.
jA(Go to next page.)jB
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
RHA652G
RHA096GA
RHA653G
RHA654G
.
.
.
.
.
..
TROUBLE DIAGNOSESAUTO
Magnet Clutch (Cont'd)
HA-94