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Nissan Qashqai J11. Manual - part 1139

HAC-192

< BASIC INSPECTION >

[MANUAL AIR CONDITIONING]

DOOR MOTOR STARTING POSITION RESET

DOOR MOTOR STARTING POSITION RESET

Description

INFOID:0000000010432527

• Step motors are used for the mode door motor air mix door motor, 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 amp. and the actual door position.
Therefore, A/C 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 amp. to the air mix door motor, mode door motor, and intake door

motor, which then perform zero position reset.

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

switch is next turned ON.

- The ignition switch is turned from ON to OFF a total of 360 times.
- The ignition switch turns OFF while the mode door motor, air mix door motor, or intake door motor is operat-

ing.

• If A/C amp., air mix door motor, mode door motor, or intake door motor is removed, it is necessary to perform

motor zero position reset using CONSULT.

Work Procedure

INFOID:0000000010432528

PERFORM DOOR MOTOR STARTING POSITION RESET

With CONSULT

Turn ignition switch ON.

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

Touch “Start” and wait 10 seconds.

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

>> INSPECTION END

U1000 CAN COMM CIRCUIT

HAC-193

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

HAC

DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000010432529

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:0000000010432530

DTC DETECTION LOGIC

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM SELF-DIAGNOSIS

With CONSULT

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

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

Check DTC.

Is DTC detected?

YES

>> Refer to

HAC-193, "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:0000000010432531

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 amp. is not transmitting or receiving CAN communication signal for
2 seconds or more.

HAC-194

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000010432532

Initial diagnosis of A/C amp.

DTC Logic

INFOID:0000000010432533

DTC DETECTION LOGIC

POSSIBLE CAUSE

A/C amp. (CAN communication function malfunction)

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM SELF-DIAGNOSIS

With CONSULT

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

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

Check DTC.

Is DTC detected?

YES

>> Refer to

HAC-194, "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:0000000010432534

REPLACE A/C AMP.

Replace A/C amp. Refer to

HAC-226, "Removal and Installation"

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

U1010

CONTROL UNIT(CAN)
[CONTROL UNIT(CAN)]

When detecting error during the initial diagnosis of CAN controller of A/C amp.

B24A4 INTAKE SENSOR

HAC-195

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

HAC

B24A4 INTAKE SENSOR

DTC Logic

INFOID:0000000010499386

DTC DETECTION LOGIC

POSSIBLE CAUSE

[CIRCUIT SHORT TO GROUND]

• Intake sensor
• A/C amp.
• Harness or connectors (The sensor circuit is shorted to ground.)

[CIRC SHORT TO BATT OR OPEN]

• Intake sensor
• A/C amp.
• Harness or connectors (The sensor circuit is open or shorted to battery.)

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

Turn ignition switch ON.

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

Check DTC.

Is DTC detected?

YES

>> Refer to

HAC-195, "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:0000000010499387

NOTE:
The intake sensor cannot be reused. If the intake sensor harness connector is disconnected, sensor must be
replaced.

CHECK INTAKE SENSOR SIGNAL

Turn ignition switch ON.

Check voltage between A/C amp. harness connector and ground

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B24A4

INTAKE SENSOR
(Intake sensor)

[CIRCUIT SHORT TO GROUND]

The intake sensor recognition temperature is
too low [less than

−

C (

−

F)].

[CIRC SHORT TO BATT OR OPEN]

The intake sensor recognition temperature is
too high [more than 100

C (212

F)].

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