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