Nissan Altima HL32 Hybrid. Manual - part 256

EC-8

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DIAGNOSIS AND REPAIR WORK FLOW

1.

GET INFORMATION FOR SYMPTOM

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

the incident/malfunction occurred) using the “Diagnostic Work Sheet”. (Refer to 

EC-9, "Diagnostic Work

Sheet"

.)

>> GO TO 2.

2.

CHECK DTC

1. Check DTC.

2. Perform the following procedure if DTC is displayed.

-

Record DTC and freeze frame data. (Print them out with CONSULT-III or GST.)

-

Erase DTC. (Refer to 

EC-82, "Diagnosis Description"

.)

-

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

(Symptom Table is useful. Refer to 

EC-454, "Symptom Table"

.)

3. Check related service bulletins for information.
Is any symptom described and is any DTC detected?

Symptom is described, DTC is detected>>GO TO 3.

Symptom is described, DTC is not detected>>GO TO 4.

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

3.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer (except MIL ON).

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

EC-458, "Description"

 and 

EC-

439, "Fail Safe"

.

Diagnosis Work Sheet is useful to verify the incident.

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

>> GO TO 5.

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. Refer to 

EC-458, "Description"

 and 

EC-

439, "Fail Safe"

.

Diagnosis Work Sheet is useful to verify the incident.

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

>> GO TO 6.

5.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC CONFIRMATION PROCEDURE for the displayed DTC, and then make sure that DTC is

detected again.

If two or more DTCs are detected, refer to 

EC-441, "DTC Inspection Priority Chart"

 and determine trouble

diagnosis 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 10.

NO

>> Check according to 

EC-442, "DTC Index"

.

6.

PERFORM BASIC INSPECTION

Perform 

EC-11, "BASIC INSPECTION : Special Repair Requirement"

.

Do you have CONSULT-III?

DIAGNOSIS AND REPAIR WORK FLOW

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YES

>> GO TO 7.

NO

>> GO TO 9.

7.

PERFORM SPEC IN DATA MONITOR MODE

With CONSULT-III

Make sure that “MAS A/F SE-B1”, “B/FUEL SCHDL” and “A/F ALPHA-B1” are within the SP value using CON-

SULT-III in “SPEC” of “DATA MONITOR” mode. Refer to 

EC-105, "Component Function Check"

.

Is the measurement value within the SP value?

YES

>> GO TO 9.

NO

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Detect malfunctioning part according to 

EC-106, "Diagnosis Procedure"

.

Is malfunctioning part detected?

YES

>> GO TO 11.

NO

>> GO TO 9.

9.

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE

Detect malfunctioning system according to 

EC-454, "Symptom Table"

 based on the confirmed symptom in

step 4, and determine the trouble diagnosis order based on possible causes and symptom.

>> GO TO 10.

10.

DETECT MALFUNCTIONING PART BY DIAGNOSIS PROCEDURE

Inspect according to Diagnosis Procedure of the system.

NOTE:

The Diagnosis Procedure in EC section described based on open circuit inspection. A short circuit inspection

is also required for the circuit check in the Diagnosis Procedure. For details, refer to 

GI-45, "Circuit Inspec-

tion"

.

Is malfunctioning part detected?

YES

>> GO TO 11.

NO

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

SULT-III. Refer to 

EC-405, "Reference Value"

.

11.

REPAIR OR REPLACE THE MALFUNCTIONING PART

1. Repair or replace the malfunctioning part.

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

ment.

3. Check DTC. If DTC is displayed, erase it. Refer to 

EC-82, "Diagnosis Description"

.

>> GO TO 12.

12.

FINAL CHECK

When DTC was detected in step 2, perform DTC CONFIRMATION PROCEDURE or Component Function

Check again, and then make sure that the malfunction have been repaired securely.

When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and make sure

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

YES-1 >> DTC is detected: GO TO 10.

YES-2 >> Symptom remains: GO TO 6.

NO

>> Before returning the vehicle to the customer, make sure to erase unnecessary DTC in ECM.

(Refer to 

EC-82, "Diagnosis Description"

.) If the completion of SRT is needed, drive vehicle under

the specific DRIVING PATTERN in 

EC-445, "How to Set SRT Code"

.

Diagnostic Work Sheet

INFOID:0000000004211302

DESCRIPTION

EC-10

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DIAGNOSIS AND REPAIR WORK FLOW

There are many operating conditions that lead to the malfunction of

engine components. A good grasp of such conditions can make trou-

bleshooting faster and more accurate.

In general, each customer feels differently about an incident. It is

important to fully understand the symptoms or conditions for a cus-

tomer complaint.

Utilize a diagnostic worksheet like the one on the WORKSHEET

SAMPLE in order to organize all the information for troubleshooting.

Some conditions may cause the MIL to come on steady or blink and

DTC to be detected. Examples:

• Vehicle ran out of fuel, which caused the engine to misfire.

• Fuel filler cap was left off or incorrectly screwed on, allowing fuel to

evaporate into the atmosphere.

WORKSHEET SAMPLE

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INSPECTION AND ADJUSTMENT

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INSPECTION AND ADJUSTMENT

BASIC INSPECTION
BASIC INSPECTION : Special Repair Requirement

INFOID:0000000004211303

1.

INSPECTION START

1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for

scheduled maintenance.

2. Open engine hood and check the following:

-

Harness connectors for improper connections

-

Wiring harness for improper connections, pinches and cut

-

Vacuum hoses for splits, kinks and improper connections

-

Hoses and ducts for leaks

-

Air cleaner clogging

-

Gasket

3. Lift up the vehicle.

4. Activate “INSPECTION MODE 1” (

HBC-104

) to start engine,

and warm up engine until engine coolant temperature indicator

points the middle of gauge.

Ensure engine stays below 1,500 rpm.

5. Run engine at about 2,500 rpm for about 2 minutes under no load.

6. Make sure that no DTC is displayed with CONSULT-III or GST.
Is any DTC detected?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

REPAIR OR REPLACE

Repair or replace components as necessary according to corresponding Diagnostic Procedure.

>> GO TO 3

3.

CHECK TARGET IDLE SPEED

1. Run engine at about 2,500 rpm for about 2 minutes under no load.

2. Rev engine two or three times under no load, then run engine at idle speed for about 1 minute.

3. Shift the selector lever to N position with engine running.

4. Check idle speed.

For procedure, refer to 

EC-14, "IDLE SPEED : Special Repair Requirement"

.

For specification, refer to 

EC-470, "Idle Speed"

.

CAUTION:

Never leave the selector lever in the N position for a long period of time. In the N position, the

engine operates but electricity cannot be generated.

5. Shift the selector lever to P position.
Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 4.

4.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

1. Turn ignition switch OFF.

2. Perform 

EC-15, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 5.

5.

PERFORM IDLE AIR VOLUME LEARNING

Perform 

EC-16, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

Is Idle Air Volume Learning carried out successfully?

YES

>> GO TO 6.

NO

>> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.

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