Nissan Maxima. Manual - part 743

HAC-148

< DTC/CIRCUIT DIAGNOSIS >

[WITH MONOCHROME DISPLAY]

B2632, B2633 AIR MIX DOOR MOTOR (DRIVER SIDE)

NO

>> Check air mix door motor (driver side) installation, and repair or replace the malfunctioning parts.

Refer to 

HAC-210, "AIR MIX DOOR MOTOR : Removal and Installation - Air Mix Door Motor

(Driver Side)"

.

Diagnosis Procedure

INFOID:0000000010051151

Regarding Wiring Diagram information, refer to 

HAC-173, "Wiring Diagram - With Monochrome Display"

.

1.

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) POWER SUPPLY

1. Turn ignition switch ON.

2. Check voltage between air mix door motor (driver side) harness

connector M128 terminal 1 and ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the harnesses or connectors.

2.

CHECK SIGNAL FOR AIR MIX DOOR MOTOR (DRIVER SIDE)

Check the output waveform (LAN signal) between air mix door motor

(driver side) harness connector M128 terminal 3 and ground using

an oscilloscope. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the harnesses or connectors.

3.

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect air mix door motor (driver side) connector.

3. Check continuity between air mix door motor (driver side) har-

ness connector M128 terminal 2 and ground.

Is the inspection result normal?

YES

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

HAC-

210, "AIR MIX DOOR MOTOR : Removal and Installa-

tion - Air Mix Door Motor (Driver Side)"

.

NO

>> Repair harness or connector.

1 - Ground

: Battery Voltage

AWIIA1142ZZ

(+)

(

−)

Voltage

Air mix door motor

 (driver side)

—

Connector

Terminal

M128

3

Ground

AWIIA1143ZZ

SJIA1453J

2 - Ground

: Continuity should exist.

AWIIA1144ZZ

B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

HAC-149

< DTC/CIRCUIT DIAGNOSIS >

[WITH MONOCHROME DISPLAY]

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HAC

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B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

Description

INFOID:0000000010051152

COMPONENT DESCRIPTION

Air Mix Door Motor (passenger side)

• The air mix door motor (passenger side) (1) is attached to the

heater & cooling unit assembly.

• It rotates so that the air mix door is opened or closed to a position

set by the A/C auto amp.

• Motor rotation is then conveyed through a shaft and the air mix

door position feedback is then sent to the A/C auto amp. by PBR

built-in air mix door motor.

DTC Logic

INFOID:0000000010051153

DTC DETECTION LOGIC

NOTE:

If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to 

HAC-

133, "DTC Logic"

 or 

HAC-134, "DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT

1. Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC. 

2. Check if any DTC No. is displayed in the self-diagnosis results. 

NOTE:

If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to 

HAC-

133, "DTC Logic"

 or 

HAC-134, "DTC Logic"

. 

Is DTC No.“B2634” or “B2635” displayed?

YES

>> Perform trouble diagnosis for the air mix door motor (passenger side). Refer to 

HAC-150, "Diag-

nosis Procedure"

. 

NO

>> GO TO 2.

2.

FUNCTION INSPECTION

1. Press the temperature control switch (passenger side) until 32

°C (90°F) is displayed.

2. Check for warm air at discharge air outlets.

3. Operate the A/C compressor. 

4. Press the temperature control switch (passenger side) until 18

°C (60°F) is displayed.

5. Check for cool air at air discharge outlets.
Does it operate normally?

YES

>> Inspection End.

AWIIA1118ZZ

DTC

Items

 (CONSULT screen terms)

Diagnostic item is detected when...

Possible cause

B2634

PASS AIRMIX ACTR (SHORT)

Air mix door PBR (passenger side) position 
5% or less

• Air mix door motor (passenger 

side)

• A/C auto amp.
• Harness and connector

(CAN communication line is open 
or shorted)
(Air mix door motor is open or 
shorted)

B2635

PASS AIRMIX ACTR (OPEN)

Air mix door PBR (passenger side) position 
95% or more

HAC-150

< DTC/CIRCUIT DIAGNOSIS >

[WITH MONOCHROME DISPLAY]

B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

NO

>> Check air mix door motor (passenger side) installation, and repair or replace the malfunctioning

parts. Refer to 

HAC-210, "AIR MIX DOOR MOTOR : Removal and Installation - Air Mix Door

Motor (Passenger Side)"

. 

Diagnosis Procedure

INFOID:0000000010051154

Regarding Wiring Diagram information, refer to 

HAC-173, "Wiring Diagram - With Monochrome Display"

.

1.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY

1. Turn ignition switch ON.

2. Check voltage between air mix door motor (passenger side) harness connector M129 terminal 1 and

ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the harnesses or connectors.

2.

CHECK SIGNAL FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)

Check the output waveform (LAN signal) between air mix door motor

(passenger side) harness connector M129 terminal 3 and ground

using an oscilloscope. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the harnesses or connectors.

3.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT

1 - Ground

:Battery Voltage

AWIIA1145ZZ

(+)

(

−)

Voltage

Air mix door motor

 (passenger side)

—

Connector

Terminal

M129

3

Ground

AWIIA1146ZZ

SJIA1453J

B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)

HAC-151

< DTC/CIRCUIT DIAGNOSIS >

[WITH MONOCHROME DISPLAY]

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1. Turn ignition switch OFF.

2. Disconnect air mix door motor (passenger side) connector.

3. Check continuity between air mix door motor (passenger side)

harness connector M129 terminal 2 and ground.

Is the inspection result normal?

YES

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

HAC-210, "AIR MIX DOOR MOTOR : Removal and

Installation - Air Mix Door Motor (Passenger Side)"

.

NO

>> Repair harness or connector.

2 - Ground

: Continuity should exist.

AWIIA1147ZZ