Nissan Qashqai J11. Manual - part 1111

HAC-80

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

DOOR MOTOR STARTING POSITION RESET

DOOR MOTOR STARTING POSITION RESET

Description

INFOID:0000000010432196

• Step motors are used for the mode door motor air mix door motor (driver side/passenger side), and intake

door motor.

• Because the step motors do not have position detection mechanisms, there may be a deviation between the

door position recognized by A/C auto amp. and the actual door position.
Therefore, A/C auto amp. performs motor zero position reset for aligning its recognized door position with
the actual door position.

• The reset signal is transmitted from A/C auto amp. to the air mix door motor (driver side/passenger side),

mode door motor, and intake door motor, which then perform zero position reset.

• After any of the following conditions is met, A/C auto amp. performs motor zero position reset when the igni-

tion switch is next turned ON.

- The battery terminal is disconnected and then reconnected.
- The travel distance reaches 3,000 km (1864 miles). [Performed every 3,000 km (1864 miles).]
• If A/C auto amp., air mix door motor (driver side, passenger side), mode door motor, or intake door motor is

removed, it is necessary to perform motor zero position reset using CONSULT.

Work Procedure

INFOID:0000000010432197

1.

PERFORM DOOR MOTOR STARTING POSITION RESET

With CONSULT

1.

Turn ignition switch ON.

2.

Select “Door Motor Starting Position Reset” in “WORK SUPPORT” mode of “HVAC” using CONSULT.

3.

Touch “Start” and wait 10 seconds.

4.

Make sure the “COMPLETED” is displayed on CONSULT screen.

>> INSPECTION END

U1000 CAN COMM CIRCUIT

HAC-81

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

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DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000010432198

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-board mul-
tiplex communication line with high data communication speed and excellent error detection ability. A modern
vehicle is equipped with many ECMs, and each control unit shares information and links with other control
units during operation (not independent). In CAN communication, 2 control units are connected with 2 commu-
nication lines (CAN-L line and CAN-H line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. 
Refer to 

LAN-56, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart"

 for details of the

communication signal. 

DTC Logic

INFOID:0000000010432199

DTC DETECTION LOGIC

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn ignition switch ON and wait for 2 seconds or more. 

2.

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

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-81, "Diagnosis Procedure"

. 

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010432200

1.

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to 

LAN-28, "Trouble Diagnosis Flow Chart"

.

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

U1000

CAN COMM CIRCUIT
(CAN COMM CIRCUIT)

When A/C auto amp. is not transmitting or receiving CAN communication sig-
nal for 2 seconds or more.

HAC-82

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

B24A0 A/C AUTO AMP.

B24A0 A/C AUTO AMP.

DTC Logic

INFOID:0000000010432202

DTC DETECTION LOGIC

POSSIBLE CAUSE

A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn ignition switch ON. 

2.

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

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-82, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010432203

1.

REPLACE A/C AUTO AMP.

Replace A/C auto amp. Refer to 

HAC-129, "Removal and Installation"

.

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B24A0

A/C AUTO AMP.
(Air conditioning automatic amplifier)

[INTERNAL ELECTRONIC ERROR]

A malfunction is detected in A/C auto amp. 
internal EEPROM memory functions.

B24A1 A/C AUTO AMP. POWER SUPPLY

HAC-83

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

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B24A1 A/C AUTO AMP. POWER SUPPLY

DTC Logic

INFOID:0000000010499361

DTC DETECTION LOGIC

POSSIBLE CAUSE

• A/C auto amp.
• Harness or connector (Accessory power supply circuits is open or shorted.)

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn ignition switch ON. 

2.

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

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-83, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010499362

1.

CHECK A/C AUTO AMP. POWER SUPPLY AND GROUND CIRCUITS

Check A/C auto amp. power supply and ground circuits. Refer to 

HAC-108, "A/C AUTO AMP. : Diagnosis Pro-

cedure"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-129, "Removal and Installation"

.

YES

>> Repair or replace malfunctioning parts.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B24A1

A/C AUTO AMP. POWER SUPPLY
(Air conditioning automatic amplifier 
power supply)

[CIRC VOLT BELOW THRESHOLD]

The accessory power voltage that is trans-
mitted to A/C auto amp. is 10.5 V or less for 
30 seconds or more.