Nissan Primera P11. Instruction — part 479
Diagnostic Procedure 9
SYMPTOM: Intake door does not change.
●
Perform PRELIMINARY CHECK 1 and Main Power Sup-
ply and Ground Circuit Check before referring to the fol-
lowing flow chart.
CHECK POWER SUPPLY FOR
INTAKE DOOR MOTOR.
Disconnect intake door motor harness
connector.
Do approx.
12 volts
exist between
intake door motor harness terminal No.
p
1
and body ground?
OK
E
NG
Check 10A fuses (No.
20
) at fuse block.
(Refer to “POWER SUP-
PLY ROUTING” in EL
section and Wiring Dia-
gram.)
CHECK BODY GROUND CIRCUIT
FOR INTAKE DOOR MOTOR.
Does continuity exist between intake
door motor harness terminal No.
p
3
and body ground when REC switch is
ON?
Does continuity exist between intake
door motor harness terminal No.
p
4
and body ground when REC switch is
OFF?
OK
E
NG
Disconnect control panel
harness connector.
Note
Check circuit continuity
between control panel
harness terminal No.
p
4
(
p
6
) and intake
door motor harness ter-
minal No.
p
3
(
p
4
)?
OK
Replace intake door motor.
Replace A/C control
panel.
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
YHA261
Intake door motor
connector
NHA452
Intake door motor
connector
Continuity should exist when
test leads are connected as
shown; itshould not exist
when test leads are reversed.
Intake door motor
connector
YHA265
Control panel
connector
Intake door motor
connector
H
H
H
H
TROUBLE DIAGNOSES
AUTO
HA-69
Diagnostic Procedure 10
SYMPTOM: Magnet clutch does not engage when A/C
switch and fan switch are ON.
CHECK POWER SUPPLY FOR
COMPRESSOR.
Disconnect compressor harness con-
nector.
Do approx.
12 volts
exist between
compressor harness terminal No.
p
1
and body ground?
No
E
Yes
Check the following.
●
Magnet clutch coil
NG
Replace magnet clutch.
Refer to HA-111.
Note
Check circuit continuity between A/C
relay harness terminal No.
p
3
and
compressor harness terminal No.
p
1
.
Continuity should exist.
If OK, check harness for short.
OK
E
NG
Check the following.
●
Thermal protector (GA,
diesel engine)
CHECK POWER SUPPLY FOR A/C
RELAY.
Do approx.
12 volts
exist between
A/C relay harness terminal No.
p
5
and body ground?
Yes
E
No
Check power supply circuit
and 10A fuse (No.
20
),
located in the fuse block).
(Refer to “POWER SUPPLY
ROUTING” in EL section
and Wiring Diagram.)
CHECK POWER SUPPLY FOR A/C
RELAY.
Do approx.
12 volts
exist between
A/C relay harness terminal No.
p
2
and body ground?
No
E
Yes
Check power supply circuit
and 10A fuse (No.
20
),
located in the fuse block).
(Refer to “POWER SUPPLY
ROUTING” in EL section
and Wiring Diagram.)
CHECK A/C RELAY AFTER DIS-
CONNECTING IT.
Refer to HA-78.
OK
E
NG
Replace A/C relay.
Reconnect A/C relay.
E
For Diesel engine
p
A
(Go to
E
For SR engine or
QG engine
p
C
(Go to
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
YHA266
Compressure
connector
YHA267
Compressure
connector
A/C relay
connector
YHA268
A/C relay
connector
YHA269
A/C relay connector
H
H
H
H
H
H
TROUBLE DIAGNOSES
AUTO
HA-70
p
A
CHECK COIL SIDE CIRCUIT OF
A/C RELAY
Do approx.
12 volts
exist between
ECM harness terminal No.
204
and
body ground?
Yes
E
No
Disconnect A/C relay.
Disconnect ECM harness
connector.
Note
CHECK CIRCUIT CONTI-
NUITY BETWEEN A/C
RELAY HARNESS TERMI-
NAL NO.
p
1
AND ECM
HARNESS TERMINAL NO.
204
.
Continuity should exist.
If OK, check harness for
short.
p
B
(Go to next page.)
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
NHA454
ECM connector
NHA455
A/C relay
connector
ECM connector
H
H
H
TROUBLE DIAGNOSES
AUTO
Diagnostic Procedure 10 (Cont’d)
HA-71
p
B
CHECK VOLTAGE FOR ECM.
Do approx.
12 volts
exist between ECM har-
ness terminal No.
403
and body ground?
Yes
E
No
CHECK ECM. Refer to EC
section.
Disconnect ECM harness connector.
Disconnect triple-pressure switch harness
connector.
Yes
CHECK CIRCUIT CONTINUITY BETWEEN
ECM HARNESS TERMINAL NO.
403
AND
TRIPLE-PRESSURE SWITCH HARNESS
TERMINAL NO.
p
4
.
Continuity should exist.
If OK, check harness for short.
CHECK TRIPLE-PRESSURE SWITCH.
Refer to HA-79.
OK
E
NG
Replace triple-pressure
switch.
Disconnect thermo control amp. switch har-
ness connector.
Note
CHECK CIRCUIT CONTINUITY BETWEEN
TRIPLE-PRESSURE SWITCH HARNESS
TERMINAL NO.
p
1
AND THERMO CON-
TROL AMP. SWITCH HARNESS TERMINAL
NO.
p
3
.
Continuity should exist.
If OK, check harness for short.
OK
CHECK THERMO CONTROL AMP. Refer to
HA-80.
Note
Check circuit continuity between control
panel harness terminal No.
p
10
and thermo
control amp. No.
p
2
.
E
OK
CHECK FOR A/C CON-
TROL PANEL OPERATION.
Does approx. 0.5V exist
between A/C control panel
harness terminal No.
p
10
and body ground?
NG
OK
Check ECM
F
Replace
A/C con-
trol panel
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
NHA456
ECM connector
NHA457
ECM connector
Triple-
pressure
switch
connector
YHA280
Triple-pressure switch
connector
Thermo control
amp.
YHA275
Thermo control
amp.
Control panel
connector
NHA453
A/C control panel
connector
H
H
H
H
H
H
H
H
H
H
TROUBLE DIAGNOSES
AUTO
Diagnostic Procedure 10 (Cont’d)
HA-72
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