MTC - 4 8 15 16 23 42

TROUBLE DIAGNOSIS

*1

MTC-85, "Removal and Installation for Compressor Clutch"

*3

MTC-18, "Maintenance of Lubricant

Quantity in Compressor"

*5 MA-14, "Checking Drive Belts"

(QR25DE) or MA-21, "Checking

Drive Belts" (VQ35DE)

*4

MTC-38, "Operational Check"

*2

MTC-86, "INSTALLATION"

Intake Sensor Circuit

COMPONENT DESCRIPTION

Intake Sensor

The intake sensor is located on the heater and cooling unit. It converts temperature of air after it passes through the evaporator into a resistance value which is then input to the A/C control unit.

After disconnecting intake sensor harness connector, measure resistance between terminals 1 and 2 at sensor harness side, using the table below.

EJS00100

Temperature

°

C (

°

F)

-15 (5)

-10 (14)

-5 (23)

0 (32)

5 (41)

10 (50)

15 (59)

20 (68)

25 (77)

30 (86)

35 (95)

40 (104)

45 (113)

Resistance k

Ω

12.34

9.62

7.56

6.00

4.80

3.87

3.15

2.57

2.12

1.76

1.47

1.23

1.04

If NG, replace intake sensor.

DIAGNOSTIC PROCEDURE

SYMPTOM: Intake sensor circuit is open or shorted.

WJIA0091E

A

B

C

D

E

F

G

H

I

MTC

K

L

M

WJIA0177E

Revision: May 2004

MTC-65

2002 Altima

TROUBLE DIAGNOSIS

1.

CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND BODY GROUND

Disconnect intake sensor harness connector.

Connector

M53-1

Terminal

Wire color

B

Body ground

OK or NG

OK

NG

>> GO TO 2.

>> Repair harness or connector.

Continuity

Yes

2.

CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND A/C CONTROL UNIT

Disconnect A/C control unit harness connector.

Terminals

Connector

M53-2

Wire color

R/G

Connector

M51-6

OK or NG

OK

NG

>> GO TO 3.

>> Repair harness or connector.

Wire color

R/G

Continuity

Yes

WJIA0178E

WJIA0179E

3.

CHECK INTAKE SENSOR

Refer to MTC-65, "Intake Sensor" .

OK or NG

OK

NG

>> Replace A/C control unit.

>> Replace intake sensor.

Revision: May 2004

MTC-66

2002 Altima