Nissan Primera P11. Instruction — part 478
Diagnostic Procedure 5
SYMPTOM: Starting fan speed control does not operate.
CHECK THERMAL TRANSMITTER
CIRCUIT.
Go to Diagnostic Procedure 14. (HA-
77)
OK
E
NG
Replace engine thermal
transmitter.
CHECK A/C CONTROL PANEL
OPERATION
Do approx.
12V
exist between A/C
control panel harness terminal
p
22
and
body ground when water temp. is
below 56°C (133°F)?
NG
E
NG
Replace A/C control
panel
Note
Disconnect auto amp. and A/C control
panel harness connector.
Check circuit continuity between auto
amp. harness terminal No.
p
11
and
A/C control panel harness terminal No.
p
35
.
OK
Replace auto amp.
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
NHA451
A/C control panel
connector
YHA259
Auto amp.
connector
A/C control panel
connector
H
H
H
TROUBLE DIAGNOSES
AUTO
HA-65
Diagnostic Procedure 6
SYMPTOM: There is too much difference between setting
temp. on PTC and in-vehicle temperature.
●
Perform PRELIMINARY CHECK 2 before referring to the
following flow chart.
C/R
*2
CHECK PBR.
Connect checking resistor.
(Refer to HA-30.)
Do approx.
5 volts
exist between air
mix door motor harness terminal No.
p
4
and
p
3
when PTC is set at
25°C (77°F)?
OK
E
NG
CHECK PTC.
(Refer to HA-84.)
OK
NG
Replace
A/C control
panel.
p
A
(Go to next page.)
CHECK PBR.
Refer to Inspection of Sen-
sor.
OK
NG
Replace auto amp.
CHECK AIR MIX DOOR
MECHANISM.
Refer to Control Linkage
Adjustment. (Refer to
HA-83.)
OK
NG
Repair or
adjust.
Replace AIR MIX MOTOR.
RHA963G
Air mix door motor con-
nector
Checking resistor
Refer to pageHA-30.
H
H
H
H
H
H
H
TROUBLE DIAGNOSES
AUTO
HA-66
p
A
CHECK IN-VEHICLE SENSOR AND
AMBIENT SENSOR.
(Refer to Control System Input Compo-
nents.) (HA-85, 86)
OK
E
NG
Replace in-vehicle sen-
sor or ambient sensor.
CHECK SUNLOAD SENSOR.
Go to Diagnostic Procedure 13. (HA-
76)
OK
E
NG
Replace sunload sensor
or auto amp.
CHECK AUTO AMP. OPERATION.
Do approx.
0.5 volts
exist between
auto amp. harness terminal No.
p
9
and body ground when A/C switch
is ON?
Do approx. 0 volts exist between
auto amp. harness terminal No.
p
9
and body ground when A/C switch
is OFF?
OK
E
NG
CHECK A/C CONTROL
PANEL OPERATION.
Do approx.
0.5 volts
exist between A/C con-
trol panel connector ter-
minal No.
p
29
and body
ground when A/C switch
is ON?
OK
NG
Replace
A/C con-
trol panel
Replace auto amp.
Note
Check circuit continuity
between A/C control
panel harness terminal
p
29
and Auto amp. har-
ness terminal
p
9
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
RHA037H
CONNECT
Auto amp.
connector
M421
Auto amp.
connector M421
H
H
H
H
H
H
H
TROUBLE DIAGNOSES
AUTO
Diagnostic Procedure 6 (Cont’d)
HA-67
Diagnostic Procedure 7
SYMPTOM: Air mix door motor does not operate normally.
●
Perform PRELIMINARY CHECK 2 before referring to the
following flow chart.
C/R
*2
Note
CHECK AUTO AMP. AND PTC.
Connect checking resistor.
(Refer to page HA-30.)
Does air outlet temperature change
when you move PTC from 20°C (68°F)
to 30°C (86°F)?
OK
E
NG
CHECK PTC CIRCUIT
BETWEEN PTC AND
AUTO AMP.
Disconnect control panel
and auto amp. harness
connectors.
Check circuit continuity
between control panel
harness terminal No.
p
21
and auto amp. har-
ness terminal No.
p
4
.
OK
CHECK SENSOR CIRCUIT.
Note
Check circuit continuity
between control panel
harness terminal No.
p
25
and auto amp. har-
ness terminal No.
p
5
.
OK
CHECK PTC.
(Refer to HA-84.)
OK
E
NG
Replace A/C control
panel.
CHECK FOR OUTPUT OF AUTO
AMP.
Connect checking resistor.
Do approx. 10.5 volts exist between air
mix door motor harness terminals No.
p
4
and
p
1
when you move PTC
from 18°C (64°F) to 32°C (90°F) or
when you move PTC from 32°C (90°F)
to 18°C (64°F)?
OK
E
NG
Disconnect auto amp.
and air mix door motor
harness connectors.
Note
Check circuit continuity
between auto amp. har-
ness terminal No.
p
12
(
p
13
) and air mix door
motor harness terminal
No.
p
1
(
p
4
).
OK
Replace auto amp.
Replace air mix door motor.
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
How to repair
Ambient sensor
circuit
Go to Diagnostic
Procedure 11.
In-vehicle sensor
circuit
Go to Diagnostic
Procedure 12.
Air mix door
operation
Terminal No.
Voltage
p
1
p
4
Cold
,
Hot
!
@
Approx.
10.5V
Hot
,
Cold
@
!
Stop
—
—
0V
YHA262
Control panel
connector
Auto amp.
connector
YHA263
Auto amp.
connector
Control panel
connector
NHA303
Air mix door motor
connector
H
H
H
H
H
H
H
TROUBLE DIAGNOSES
AUTO
HA-68
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