Infiniti QX56 (Z62). Manual - part 800

 

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Infiniti QX56 (Z62). Manual - part 800

 

 

B2634, B2635 FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)

HAC-91

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B2634, B2635 FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)

DTC Logic

INFOID:0000000006275925

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-91, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006275926

1.

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

1.

Turn ignition switch ON.

2.

Check output waveform between front air mix door motor RH harness connector and ground with the
oscilloscope. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

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

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

HAC-152, "Exploded View"

.

Is the inspection result normal?

YES

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

HAC-153, "AIR MIX DOOR MOTOR :

Removal and Installation"

.

DTC

Items

(CONSULT-III screen terms)

DTC detection condition

Possible cause

B2634

PASS AIR MIX DOOR MOT

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

• Front air mix door motor (passenger 

side)
(PBR internal circuit is open or short-
ed)

• Front air mix door motor (passenger 

side) installation condition

• A/C auto amp.
• Harness and connector

(LIN communication line is open or 
shorted)

B2635

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

+

Output waveform

Front air mix door motor RH

Connector

Terminal

M255

3

Ground

SJIA1453J

HAC-92

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B2634, B2635 FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)

NO

>> Repair or replace malfunctioning part.

3.

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

1.

Turn ignition switch OFF.

2.

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

3.

Check continuity between front air mix door motor RH 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 RH

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M255

3

M50

16

Existed

B2636, B2637, B2638, B2639, B2654, B2655 FRONT MODE DOOR MOTOR

HAC-93

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

B2636, B2637, B2638, B2639, B2654, B2655 FRONT MODE DOOR MOTOR

DTC Logic

INFOID:0000000006275927

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-93, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006275928

1.

CHECK FRONT MODE DOOR MOTOR COMMUNICATION SIGNAL

1.

Turn ignition switch ON.

2.

Check output waveform between front mode door motor harness connector and ground with the oscillo-
scope. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK INSTALLATION OF FRONT MODE DOOR MOTOR CONTROL LINKAGE

Check front mode door motor control linkage is properly installed. Refer to 

HAC-152, "Exploded View"

.

DTC

Items

(CONSULT-III screen terms)

DTC detection condition

Possible cause

B2636

DR VENT DOOR FAIL

When the malfunctioning door position 
is detected at VENT position

• Front mode door motor

(PBR internal circuit is open or short-
ed)

• Front mode door motor control linkage 

installation condition

• A/C auto amp.
• Harness and connector

(LIN communication line is open or 
shorted)

B2637

DR B/L DOOR FAIL

When the malfunctioning door position 
is detected at B/L position

B2638

DR D/F1 DOOR FAIL

When the malfunctioning door position 
is detected at FOOT position

B2639

DR DEF DOOR FAIL

When the malfunctioning door position 
is detected at DEF position

B2654

D/F2 VENT DOOR FAIL

When the malfunctioning door position 
is detected at D/F position

B2655

B/L DOOR FAIL

When the malfunctioning door position 
is detected at B/L position

+

Output waveform

Front mode door motor

Connector

Terminal

M253

3

Ground

SJIA1453J

HAC-94

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B2636, B2637, B2638, B2639, B2654, B2655 FRONT MODE DOOR MOTOR

Is the inspection result normal?

YES

>> Replace front mode door motor. Refer to 

HAC-153, "MODE DOOR MOTOR : Removal and Instal-

lation"

.

NO

>> Repair or replace malfunctioning part.

3.

CHECK FRONT MODE DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect front mode door motor and A/C auto amp. connector. 

3.

Check continuity between front mode door motor harness connector and A/C auto amp. harness connec-
tor. 

Is the inspection result normal?

YES

>> Replace A/C auto amp.. Refer to 

HAC-146, "Removal and Installation"

.

NO

>> Repair harness or connector.

Front mode door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M253

3

M50

16

Existed

 

 

 

 

 

 

 

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