Nissan Leaf. Manual - part 768

DIAGNOSIS AND REPAIR WORK FLOW

HAC-75

< BASIC INSPECTION >

[AUTO A/C (WITH HEAT PUMP)]

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORK FLOW

Work Flow

INFOID:0000000010121776

OVERALL SEQUENCE

DETAILED FLOW

JMIIA2163GB

HAC-76

< BASIC INSPECTION >

[AUTO A/C (WITH HEAT PUMP)]

DIAGNOSIS AND REPAIR WORK FLOW

1.

GET INFORMATION FOR SYMPTOM

1. Get detailed information from the customer about the symptom (the condition and the environment when

the incident/malfunction occurs).

2. Check operation condition of the function that is malfunctioning.

>> GO TO 2.

2.

CHECK DTC IN VCM

1. Check DTC in VCM.

2. Check related service bulletins for information.
Are any DTCs detected?

YES

>> Check the DTC logic.

NO

>> GO TO 3.

3.

CHECK DTC

1. Check DTC.

2. Perform the following procedure if DTC is detected.

-

Record DTC and freeze frame data (Print them out using CONSULT.)

-

Erase DTC.

-

Study the relationship between the cause detected by DTC and the symptom described by the customer.

3. Check related service bulletins for information.
Are any symptoms described and any DTC detected?

Symptom is described, DTC is detected>>GO TO 4.

Symptom is described, DTC is not detected>>GO TO 5.

Symptom is not described, DTC is detected>>GO TO 6.

4.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer.

Also study the normal operation and fail-safe related to the symptom.

Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 6.

5.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer.

Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 7.

6.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC CONFIRMATION PROCEDURE for the detected DTC, and then check that DTC is detected

again. At this time, always connect CONSULT to the vehicle, and check self diagnostic results in real time.

If two or more DTCs are detected, refer to DTC INSPECTION PRIORITY CHART, and determine trouble diag-

nosis order.

NOTE:

• Freeze frame data is useful if the DTC is not detected.

• Perform Component Function Check if DTC CONFIRMATION PROCEDURE is not included on Service

Manual. This simplified check procedure is an effective alternative though DTC cannot be detected during

this check.

If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC CONFIR-

MATION PROCEDURE.

Is DTC detected?

YES

>> GO TO 8.

NO

>> Check intermittent incident. Refer to 

GI-53, "Intermittent Incident"

.

7.

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS

DIAGNOSIS AND REPAIR WORK FLOW

HAC-77

< BASIC INSPECTION >

[AUTO A/C (WITH HEAT PUMP)]

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Detect malfunctioning system according to SYMPTOM DIAGNOSIS based on the confirmed symptom in step

4, and determine the trouble diagnosis order based on possible causes and symptom.
Is the symptom described?

YES

>> GO TO 8.

NO

>> Monitor input data from related sensors or check voltage of related module terminals using CON-

SULT.

8.

DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

Inspect according to Diagnostic Procedure of the system.
Is malfunctioning part detected?

YES

>> GO TO 9.

NO

>> Check intermittent incident. Refer to 

GI-53, "Intermittent Incident"

.

9.

REPAIR OR REPLACE THE MALFUNCTIONING PART

1. Repair or replace the malfunctioning part.

2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-

ment.

3. Check DTC. If DTC is detected, erase it.

>> GO TO 10.

10.

FINAL CHECK

When DTC is detected in step 3, perform DTC CONFIRMATION PROCEDURE again, and then check that the

malfunction is repaired securely.

When symptom is described by the customer, refer to confirmed symptom in step 4 or 5, and check that the

symptom is not detected.
Is DTC detected and does symptom remain?

YES-1 >> DTC is detected: GO TO 8.

YES-2 >> Symptom remains: GO TO 5.

NO

>> Before returning the vehicle to the customer, always erase DTC.

HAC-78

< BASIC INSPECTION >

[AUTO A/C (WITH HEAT PUMP)]

OPERATION INSPECTION

OPERATION INSPECTION

Work Procedure

INFOID:0000000010121777

The purpose of the operational check is to check that the individual system operates normally. 

1.

CHECK MEMORY FUNCTION

1. Set temperature to 90

°F (32°C) by operating the temperature control switch. 

2. Press OFF switch.

3. Turn ignition switch OFF.

4. Turn ignition switch ON.

5. Press AUTO switch.

6. Check that set temperature is maintained.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 10.

2.

CHECK AIR FLOW

1. Operate fan control switch. 

2. Check that air flow changes. Check operation for all fan speeds.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 10.

3.

CHECK AIR OUTLET

1. Operate fan control switch to set the fan speed to maximum speed. 

2. Operate MODE switch and DEF switch. 

3. Check that air outlets change according to each indicated air outlet by placing a hand in front of the air

outlets. Refer to 

VTL-11, "System Description"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 10.

4.

CHECK AIR INLET

1. Press intake switch to set the air inlet to recirculation. (Intake switch indicator lamp turns ON.)

2. Listen to intake sound and confirm air inlets change. 

3. Press intake switch again to set the air inlet to fresh air intake. (Intake switch indicator lamp turns OFF.)

4. Listen to intake sound and confirm air inlets change. 
Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 10.

5.

CHECK A/C SWITCH

1. Press A/C switch. The A/C switch indicator lamp is turns ON.

2. Check visually and by sound that the electric compressor operates. 

3. Press A/C switch again The A/C switch indicator lamp is turns OFF. 

4. Check that electric compressor stops. 
Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 10.

6.

CHECK DISCHARGE AIR TEMPERATURE

1. Push the HEAT switch and check that the HEAT switch indicator lamp turns ON.

2. Operate temperature control switch.

3. Check that discharge air temperature changes. 
Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 10.