Nissan Primera P11. Manual — part 481
Diagnostic Procedure 14
SYMPTOM: Thermal transmitter circuit is open or shorted.
Note
CHECK THERMAL TRANSMITTER
CIRCUIT.
Disconnect thermal transmitter harness
connector.
Do approx.
12 volts
exist between ther-
mal transmitter harness terminal No.
p
1
and body ground?
OK
E
NG
Check circuit continuity
between thermal trans-
mitter harness terminal
No.
p
1
and control
panel harness terminal
No.
p
24
.
Replace control panel
Disconnect control panel harness con-
nector.
CHECK THERMAL TRANSMITTER.
(Refer to “THERMAL TRANSMITTER
CHECK” in EL section.)
OK
E
NG
Replace thermal trans-
mitter.
Replace control panel
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
YHA292
Thermal transmitter
connector
YHA293
Control panel
connector
Thermal transmitter
connector
H
H
H
H
TROUBLE DIAGNOSES
AUTO
HA-77
Electrical Components Inspection
FAN SWITCH
Check voltage terminals at each switch position.
FUNCTION
A/C
CONTROL
PANEL
TERMINAL
SWITCH POSITION
OFF
LOW
MEDIUM
LOW
MEDIUM
HIGH
HIGH
I
I
I
I
I
I
I
I
I
I
OFF
—
—
—
—
—
—
FAN RELAY LO
33
12V
<0.5V
<0.5V
<0.5V
<0.5V
FAN RELAY MLO
32
12V
12V
<0.5V
<0.5V
<0.5V
FAN RELAY MHI
31
12V
12V
12V
<0.5V
<0.5V
FAN RELAY HI
30
12V
12V
12V
12V
<0.5V
A/C SWITCH
Check voltage terminals at each switch position.
Switch condition
Terminal No.
A/C
p
10
p
29
ON
< 0.5V
< 0.5V
OFF
0
0
A/C, LOW, MED-LOW, MED-HIGH and HIGH RELAYS
Check continuity between terminal Nos.
p
3
and
p
5
.
Conditions
Continuity
12V direct current supply between terminal Nos.
p
1
and
p
2
Yes
No current supply
No
If NG, replace relay.
NHA291
A/C control panel
NHA292
A/C control panel
YHA389
TROUBLE DIAGNOSES
AUTO
HA-78
TRIPLE-PRESSURE SWITCH (WITH DIESEL ENGINE)
Terminals
High-pressure side line
pressure
kPa (bar, kg/cm
2
, psi)
Operation
Continuity
Low-
pressure
side
p
1
-
p
4
Increasing to
152.0 - 201.0
(1.520 - 2.010,
1.55 - 2.05, 22.0 - 29.2)
ON
Exists.
Decreasing to
152.0 - 201.0
(1.520 - 2.010,
1.55 - 2.05, 22.0 - 29.2)
OFF
Does not
exist.
Medium-
pressure
side*
p
2
-
p
3
Increasing to
1,422 - 1,618
(14.22 - 16.18,
14.5 - 16.5, 206 - 235)
ON
Exists.
Decreasing to
1,128 - 1,422
(11.28 - 14.22,
11.5 - 14.5, 164 - 206)
OFF
Does not
exist.
High-
pressure
side
p
1
-
p
4
Decreasing to
2,059 - 2,256
(20.6 - 22.6,
21 - 23, 299 - 327)
ON
Exists.
Increasing to
2,648 - 2,844
(26.5 - 28.4,
27 - 29, 384 - 412)
OFF
Does not
exist.
* For cooling fan motor operation
RHA364G
.
Triple-pressure switch
TROUBLE DIAGNOSES
AUTO
Electrical Components Inspection (Cont’d)
HA-79
PRESSURE SENSOR
THERMO CONTROL AMP.
Evaporator outlet air temperature
°C (°F)
Thermo amp.
operation
Tester
Decreasing to 0.1 - 0.9 (32 - 34)
Turn OFF
Approx. 12V
Increasing to 2.5 - 3.5 (37 - 38)
Turn ON
Approx. 0V
Control Panel System
This control panel system operates the intake door motor to activate their corresponding doors.
SWITCHES AND THEIR CONTROL FUNCTIONS
Knob/Switch position
Air outlet Intake air
Com-
pressor
Knob/Switch
A/C
A/C
q
ON*1
Mode
q
VENT
q
B/L
q
FOOT
q
F/D
q
DEF
FRE
ON*1
q
REC
*1: Compressor is operated by thermo control amp. (With diesel engine)
Compressor is operated by ECM (with SR engine and QG engine).
KHA121
Dual-pressure switch
GND
V out
V cc
V out (V)
(3.882)
(0.362)
Vcc = 5.0 (VDC)
0.278 (1.8)
2.65 (26)
Pg
Kpa
(kgf/cm
2
G)
RHA329F
TROUBLE DIAGNOSES
AUTO
Electrical Components Inspection (Cont’d)
HA-80
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