Infiniti QX56 (Z62). Manual - part 799

B2630, B2631 SUNLOAD SENSOR (DRIVER SIDE)

HAC-87

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

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HAC

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Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK SUNLOAD SENSOR

Check sunload sensor. Refer to 

HAC-104, "Component Inspection"

. 

Is the inspection result normal?

YES

>> Replace A/C auto amp.. Refer to 

HAC-146, "Removal and Installation"

.

NO

>> Replace sunload sensor. Refer to 

HAC-149, "Removal and Installation"

.

4.

CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector. 

3.

Check continuity between sunload sensor harness connector and A/C auto amp. harness connector. 

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR GROUND SHORT

Check continuity between sunload sensor harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR POWER SHORT

1.

Turn ignition switch ON.

2.

Check voltage between sunload sensor harness connector and ground. 

Is the inspection result normal?

YES

>> Replace A/C auto amp.. Refer to 

HAC-146, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000006275922

1.

CHECK SUNLOAD SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect sunload sensor connector and A/C auto amp. connector.

3.

Turn ignition switch ON.

4.

Check input voltage from sunload sensor between A/C auto amp. harness connector and ground. Refer to
applicable table for normal value. 

Sunload sensor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M74

2

M50

9

Existed

Sunload sensor

—

Continuity

Connector

Terminal

M74

2

Ground

Not existed

+

−

Voltage

(Approx.)

Sunload sensor

Connector

Terminal

M74

2

Ground

0 V

HAC-88

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B2630, B2631 SUNLOAD SENSOR (DRIVER SIDE)

NOTE:
• When checking indoors, use a lamp of approximately 60 W. Move the lamp towards and away from the

sensor to check. 

• The sunload amount produced by direct sunshine in fair weather is equivalent to approximately 0.770

kW/m

2

 (662 kcal/m

2

·h). 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace sunload sensor. Refer to 

HAC-149, "Removal and Installation"

.

+

−

A/C auto amp.

Connector

Terminal

M50

9

Ground

JPIIA1659GB

B2632, B2633 FRONT AIR MIX DOOR MOTOR (DRIVER SIDE)

HAC-89

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B2632, B2633 FRONT AIR MIX DOOR MOTOR (DRIVER SIDE)

DTC Logic

INFOID:0000000006275923

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT-III.

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-89, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006275924

1.

CHECK FRONT AIR MIX DOOR MOTOR (DRIVER SIDE) COMMUNICATION SIGNAL

1.

Turn ignition switch ON.

2.

Check output waveform between front air mix door motor LH harness connector and ground with the oscil-
loscope. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK INSTALLATION OF FRONT AIR MIX DOOR MOTOR (DRIVER SIDE)

Check front air mix door motor (driver side) is properly installed. Refer to 

HAC-152, "Exploded View"

.

Is the inspection result normal?

YES

>> Replace front air mix door motor (driver side). Refer to 

HAC-153, "AIR MIX DOOR MOTOR :

Removal and Installation"

.

NO

>> Repair or replace malfunctioning part.

DTC

Items

(CONSULT-III screen terms)

DTC detection condition

Possible cause

B2632

DR AIR MIX DOOR MOT

Front air mix door motor (driver side) 
PBR position 95% or more

• Front air mix door motor (driver side)

(PBR internal circuit is open or short-
ed)

• Front air mix door motor (driver side) 

installation condition

• A/C auto amp.
• Harness and connector

(LIN communication line is open or 
shorted)

B2633

Front air mix door motor (driver side) 
PBR position 5% or less

+

−

Output waveform

Front air mix door motor LH

Connector

Terminal

M252

3

Ground

SJIA1453J

HAC-90

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B2632, B2633 FRONT AIR MIX DOOR MOTOR (DRIVER SIDE)

3.

CHECK FRONT AIR MIX DOOR MOTOR (DRIVER SIDE) COMMUNICATION SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect front air mix door motor LH and A/C auto amp. connector. 

3.

Check continuity between front air mix door motor LH harness connector and A/C auto amp. harness con-
nector. 

Is the inspection result normal?

YES

>> Replace A/C auto amp.. Refer to 

HAC-146, "Removal and Installation"

.

NO

>> Repair harness or connector.

Front air mix door motor LH

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M252

3

M50

16

Existed