Nissan Qashqai (2007-2010). Manual — part 932

HAC-88

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INTAKE SENSOR

After disconnecting intake sensor (1) connector M42, measure resis-
tance between terminals 1 and 2 at sensor side. Refer to table
below.

If NG, replace intake sensor.

Temperature

°

C (

°

F)

Resistance k

Ω

−

15 (5)

12.34

−

10 (14)

9.62

−

5 (23)

7.56

0 (32)

6.00

5 (41)

4.80

10 (50)

3.87

15 (59)

3.15

20 (68)

2.57

25 (77)

2.12

30 (86)

1.76

35 (95)

1.47

40 (104)

1.23

45 (113)

1.04

JPIIA0101ZZ

POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP.

HAC-89

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP.

Description

INFOID:0000000000954676

COMPONENT DESCRIPTION

Auto Amp. (Automatic Amplifier)

The auto amp. (1) has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation. The air mix door motors, mode door motor, intake door
motor, blower motor and compressor are then controlled.
The auto amp. is unitized with control mechanisms. Signal from vari-
ous switches and potentio temperature control (PTC) are directly
entered into auto amp.
Self-diagnosis functions are also built into auto amp. to provide quick
check of malfunctions in the auto air conditioner system.

Power Supply and Ground Circuit for Auto Amp.

Potentio Temperature Control (PTC)

The PTC (1) is built into the auto amp. It can be set at an interval of
0.5

°

C in the 16.0

°

C to 30.0

°

C temperature range by turning temper-

ature control dial. The set temperature is displayed.

Component Function Check

INFOID:0000000000954677

1.

CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK

1.

Press AUTO switch and A/C switch.

2.

AUTO switch indicator will turn ON. Confirm that the magnet clutch engages (sound or visual inspection).
(Discharge air and blower speed will depend on ambient, in-vehicle and set temperatures.)

Does magnet clutch engaged?

YES

>> END.

NO

>> Go to Diagnosis Procedure. Refer to

HAC-89, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000000954678

1.

CHECK POWER SUPPLY CIRCUIT FOR AUTO AMP.

1.

Disconnect auto amp. connector.

JPIIA0031ZZ

JPIIA0123GB

JPIIA0113ZZ

HAC-90

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP.

2.

Check voltage between auto amp. harness connector M53 terminals 18, 39 and 40 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK FUSE

Check 10A fuses [Nos. 4, 8 and 17, located in the fuse block (J/B)]. Refer to

PG-110, "Fuse, Connector and

Terminal Arrangement"

.

Is the inspection result normal?

YES

>> Check harness for open circuit. Repair or replace if necessary.

NO

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

3.

CHECK GROUND CIRCUIT FOR AUTO AMP.

1.

Turn ignition switch OFF.

2.

Check continuity between auto amp. harness connector M53 terminal 17 and ground.

Is the inspection result normal?

YES

>> Replace auto amp.

NO

>> Repair harness or connector.

(+)

(-)

Ignition switch position

Auto amp.

—

OFF

ACC

ON

Connector

Terminal

M53

18

Ground

Approx. 0 V

Approx. 0 V

Battery voltage

39

Battery voltage

Battery voltage

Battery voltage

40

Approx. 0 V

Approx. 0 V

Battery voltage

Auto amp.

—

Continuity

Connector

Terminal

M53

17

Ground

Continuity should exist

ECM

HAC-91

< ECU DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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ECU DIAGNOSIS

ECM

HR16DE

HR16DE : Reference Value

INFOID:0000000001116978

VALUES ON THE DIAGNOSIS TOOL

Remarks:
• Specification data are reference values.
• Specification data are output/input values which are detected or supplied by the ECM at the connector.
*Specification data may not be directly related to their components signals/values/operations.
I.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show the
specification data in spite of the ignition timing not being adjusted to the specification data. this IGN TIMING
monitors the data calculated by the ECM according to the signals input from the camshaft position sensor and
other ignition timing related sensors.

TERMINAL LAYOUT

PHYSICAL VALUES

NOTE:
• ECM is located in the engine room left side near battery.
• Specification data are reference values and are measured between each terminal and ground.
• Pulse signal is measured by CONSULT-III.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.

MR20DE

Monitor Item

Condition

Values/Status

AC PRESS SEN

• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)

1.0 - 4.0 V

PBIA9221J

Terminal No.

Wire

color

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

41

Ground

G/P

Refrigerant pressure sensor

Input

[Engine is running]
• Warm-up condition
• Both A/C switch and blower

fan motor switch: ON (Com-
pressor operates)

1.0 - 4.0 V

48

Ground

R/L

Sensor ground
(Refrigerant pressure sen-
sor)

—

[Engine is running]
• Warm-up condition
• Idle speed

0 V

74

Ground

Y/W

Sensor power supply
(Refrigerant pressure sen-
sor)

—

[Ignition switch: ON]

5 V