Nissan Altima L32. Manual - part 1215

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DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

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OVERALL SEQUENCE

DETAILED FLOW

ALKIA0246GB

DIAGNOSIS AND REPAIR WORKFLOW

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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).

>> GO TO 2

2.

CHECK DTC WITH BCM AND IPDM E/R

1. Check “Self Diagnostic Result” with CONSULT-III. 

2. Perform the following procedure if DTC is displayed.

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

-

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.
Is any symptom described and any DTC detected?

Symptom is described, DTC is displayed>>GO TO 3

Symptom is described, DTC is not displayed>>GO TO 4

Symptom is not described, DTC is displayed>>GO TO 5

3.

CONFIRM THE SYMPTOM

Confirm the symptom described by the customer.

Connect CONSULT-III to the vehicle in “Data Monitor” mode and check real time diagnosis results.

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

>> GO TO 5

4.

CONFIRM THE SYMPTOM

Confirm the symptom described by the customer.

Connect CONSULT-III to the vehicle in “Data Monitor ” mode and check real time diagnosis results.

Verify relation ship 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 check that DTC is detected again.

At this time, always keep CONSULT-III connected to the vehicle, and check diagnostic results in real time.

If two or more DTCs are detected, refer to 

SEC-386, "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 in 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 Confirma-

tion Procedure.

Is DTC detected?

YES

>> GO TO 8

NO

>> Refer to 

GI-42, "Intermittent Incident"

.

6.

PERFORM BASIC INSPECTION

Perform 

SEC-13, "Basic Inspection"

.

Inspection End >> GO TO 7

7.

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE

Detect malfunctioning system according to following symptom tables based on the confirmed symptom in step

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

• Intelligent Key system/engine start function: 

SEC-204, "Symptom Table"

.

• Vehicle security system: 

SEC-205, "Symptom Table"

.

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DIAGNOSIS AND REPAIR WORKFLOW

• Nissan vehicle immobilizer system-NATS: 

SEC-206, "Symptom Table"

.

>> GO TO 8

8.

DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

Inspect according to Diagnostic Procedure of the system.

NOTE:

The Diagnostic Procedure described based on open circuit inspection. A short circuit inspection is also

required for the circuit check in the Diagnostic Procedure.
Is malfunctioning part detected?

YES

>> GO TO 9

NO

>> Check voltage of related BCM terminals using CONSULT-III.

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 or replace-

ment.

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

>> GO TO 10

10.

FINAL CHECK

When DTC was detected in step 2, perform DTC Confirmation Procedure or Component Function Check

again, and then check that the malfunction have been fully repaired.

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

the symptom is not detected.
Is the inspection result normal?

NO (DTC is detected)>>GO TO 8

NO (Symptom remains)>>GO TO 6

YES

>> Inspection End.

PRE-INSPECTION FOR DIAGNOSTIC

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PRE-INSPECTION FOR DIAGNOSTIC

Basic Inspection

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The engine start function, door lock function, power distribution system and NATS-IVIS/NMS in the Intelligent

Key system are closely related to each other regarding control. Narrow down the functional area in question

by performing basic inspection to identify which function is malfunctioning. The vehicle security function can

operate only when the door lock and power distribution system are operating normally. Therefore, it is easy to

identify any factor unique to the vehicle security system by performing the vehicle security operation check

after basic inspection.

1.

CHECK DOOR LOCK OPERATION

1. Check the door lock for normal operation with the Intelligent Key controller and door request switch.

Successful door lock operation with the Intelligent Key and request SW indicates that the remote keyless

entry receiver is functioning normally.

Identify the malfunctioning point by referring to the DLK section if the door cannot be unlocked.

Can the door be locked with the Intelligent Key and door request switch?

YES

>> GO TO 2

NO

>> Refer to 

DLK-187, "Symptom Table"

.

2.

CHECK ENGINE STARTING

1. Checks that the engine starts when operating the Intelligent Key inserted into the key slot.
Does the engine start?

YES

>> GO TO 3

NO

>> Refer to 

SEC-204, "Symptom Table"

.

3.

CHECK STEERING LOCKING

1. Does the steering lock when operating door switch after switching the power supply from ON position (or

ACC position) to LOCK position?

If door switch is malfunctioning, BCM cannot lock the steering. If BCM does not detect DTC, steering lock

unit is normal.

Does steering lock?

YES

>> GO TO 4

NO

>> Refer to 

DLK-69, "Component Function Check"

.

4.

CHECK POWER SUPPLY INDICATOR SWITCHING

1. Press push-button ignition switch and position indicator will switch from LOCK, ACC to ON gradually

when steering is locked. Checks that the position indicator is illuminated at different positions of the circuit.

Is each position indicator illuminating?

YES

>> GO TO 5

NO

>> Refer to 

PCS-80, "Component Function Check"

.

5.

CHECK VEHICLE SECURITY SYSTEM

1. Check the vehicle security system for normal operation.

The vehicle security function can operate only when the door lock and power distribution functions are

operating normally. 

Therefore, it is easy to identify any factor unique to the vehicle security by performing the vehicle security

operation check after this basic inspection.

>> Refer to 

SEC-13, "Vehicle Security Operation Check"

.

Vehicle Security Operation Check

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1.

INSPECTION START

Turn ignition switch “OFF” and pull out Intelligent Key from key slot.

NOTE:

Before starting operation check, open front windows.