Nissan Altima HL32 Hybrid. Manual - part 515

BLOWER MOTOR

HAC-81

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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BLOWER MOTOR

Description

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COMPONENT DESCRIPTION

Brush-less Motor

The blower motor utilizes a brush-less motor with a rotating magnet.

Quietness is improved over previous motors where the brush was

the point of contact and the coil rotated.

Component Function Check

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1.

CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK

1. Turn fan control dial clockwise. Blower should operate on low speed.

2. Turn fan control dial clockwise, and continue checking blower speed and fan LEDs until all speeds

checked.

Is the inspection result normal?

YES

>> END.

NO

>> Go to diagnosis procedure. Refer to 

HAC-81, "Diagnosis Procedure"

.

Diagnosis Procedure

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1.

CHECK BLOWER MOTOR OPERATING

Check blower motor operating.
Is blower motor operation under starting blower speed control?

YES

>> END.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY FOR BLOWER MOTOR

1. Disconnect blower motor connector.

2. Turn ignition switch ON (READY).

3. Check voltage between blower motor harness connector M31 terminal 4 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 6.

3.

CHECK BLOWER MOTOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between blower motor harness connector M31 terminal 1 and ground.

ZHA152H

(+)

(

−)

Voltage

Blower motor

—

Connector

Terminal

M31

4

Ground

Battery voltage

HAC-82

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND AUTO AMP.

1. Disconnect auto amp. connector.

2. Check continuity between blower motor harness connector M31 terminal 3 and auto amp. harness con-

nector M37 terminal 1.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK AUTO AMP. OUTPUT SIGNAL

1. Reconnect blower motor connector and auto amp. connector.

2. Turn ignition switch ON (READY).

3. Set MODE switch to VENT position.

4. Change fan speed from Lo to Hi, and check duty ratios between blower motor harness connector M31 ter-

minal 3 and ground by using an oscilloscope. Normal terminal 3 drive signal duty ratios are shown in the

table below.

Is the inspection result normal?

YES

>> Replace blower motor after confirming the fan air flow does not change.

NO

>> Replace auto amp. Refer to 

VTL-8, "Removal and Installation"

.

6.

CHECK POWER VOLTAGE OF BLOWER FAN MOTOR RELAY

1. Turn ignition switch OFF.

2. Remove blower fan motor relay. Refer to 

PG-55, "Electrical Units Location"

.

3. Turn ignition switch ON (READY).

4. Check the voltage between blower fan motor relay fuse block terminals 1, 3 and body ground. Refer to

PG-62, "Description"

 for relay terminal assignment.

Blower motor

—

Continuity

Connector

Terminal

M31

1

Ground

Continuity should exist

Blower motor

Auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M31

3

M37

1

Continuity should exist

JSIIA0316GB

BLOWER MOTOR

HAC-83

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

CHECK IGNITION SWITCH

Check ignition switch.
Is the inspection result normal?

YES

>> Repair harness or connector.

NG

>> Replace ignition switch.

8.

CHECK BLOWER FAN MOTOR RELAY

1. Turn ignition switch OFF.

2. Install blower fan motor relay. Refer to 

PG-55, "Electrical Units Location"

.

3. Check operation sound of the blower fan motor relay after switching ignition switch ON.
Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace blower fan motor relay.

9.

CHECK FUSE

Check fuse 15A [Nos 21 and 22, located in the fuse block (J/B)]. Refer to 

PG-64, "Terminal Arrangement"

.

Is the inspection result normal?

YES

>> Repair harness or connector.

NG

>> Replace fuse.

Component Inspection

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Confirm smooth rotation of the blower motor (1).

(+)

(

−)

Voltage

Blower fan motor relay

—

1

Ground

Battery voltage

3

JPIIA0039ZZ

HAC-84

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HEATER PUMP

HEATER PUMP

Description

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SYSTEM DESCRIPTION

This vehicle uses an heater pump for air conditioning. This provides

a stable heater performance even if the engine is stopped because

of a function of the IPDM E/R.

Component Function Check

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1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON (READY) and wait at least 5 seconds.

2. Check DTC.
Is DTC is detected?

YES

>> Go to Diagnosis Procedure. 

HAC-79, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

PERFORM AUTO ACTIVE TEST

Perform “AUTO ACTIVE TEST”. Refer to 

PCS-14, "Diagnosis Description"

.

Does the heater pump operate?

YES

>> END.

NO

>> Go to diagnosis procedure. Refer to 

HAC-84, "Diagnosis Procedure"

.

Diagnosis Procedure

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1.

PERFORM ACTIVE TEST

1. Turn ignition switch ON (READY).

2. Press OFF switch. (A/C system does not operates.)

3. Perform “HVAC TEST” in “ACTIVE TEST” mode with CONSULT-III.

4. Select “MODE 7” in “HVAC TEST” active test item.

CAUTION:

Complete this inspection within 10 seconds if there is no water in the heater pump.

5. Check that heater pump operates.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Check 10A hues (No. 41 located in IPDM E/R), and GO TO 2.

2.

CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND HEATER PUMP

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R connector and heater pump connector.

3. Check continuity between IPDM E/R harness connector F10 terminal 48 and heater pump harness con-

nector E83 terminal 1.

JPIIA0056GB

MODE 7

: HEATER PUMP ON