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Nissan Maxima. Manual - part 214

BCS

DIAGNOSIS AND REPAIR WORKFLOW

BCS-3

< BASIC INSPECTION >

[BCM]

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000009467024

OVERALL SEQUENCE

DETAILED FLOW

JMKIA0101GB

BCS-4

< BASIC INSPECTION >

[BCM]

DIAGNOSIS AND REPAIR WORKFLOW

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

CHECK DTC

1. Check DTC.

2. Perform the following procedure if DTC is displayed.

Record DTC and freeze frame data.

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

CONFIRM THE SYMPTOM

Confirm the symptom described by the customer.

Connect CONSULT to the vehicle in “DATA MONITOR” mode and check real time diagnosis results.

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

>> GO TO 5

CONFIRM THE SYMPTOM

Confirm the symptom described by the customer.

Connect CONSULT to the vehicle in “DATA MONITOR ” mode and check real time diagnosis results.

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

>> GO TO 6

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC Confirmation Procedure for the displayed DTC, and then check that DTC is detected again.

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

If two or more DTCs are detected, refer to

BCS-63, "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

>> Refer to

BCS-64, "DTC Index"

PERFORM BASIC INSPECTION

Perform

BCS-3, "Work Flow"

Inspection End>>GO TO 7

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE

Detect malfunctioning system according to

BCS-8, "System Description"

based on the confirmed symptom in

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

>> GO TO 8

BCS

DIAGNOSIS AND REPAIR WORKFLOW

BCS-5

< BASIC INSPECTION >

[BCM]

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

>> Check voltage of related BCM terminals using CONSULT.

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 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 repaired securely.

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

the symptom is not detected.
Does the symptom reappear?

YES (DTC is detected)>>GO TO 8

YES (Symptom remains)>>GO TO 6

>> Inspection End.

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM)
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) : Description

INFOID:0000000009467025

BEFORE REPLACEMENT

When replacing BCM, save or print current vehicle specification with CONSULT configuration before replace-

ment.

NOTE:

If “Before Replace ECU” cannot be used, use the “After Replace ECU” or “Manual Configuration” after replac-

ing BCM.

AFTER REPLACEMENT

CAUTION:

• When replacing BCM, you must perform “After Replace ECU” with CONSULT.

- Complete the procedure of “After Replace ECU” in order.

- If you set incorrect “After Replace ECU”, incidents might occur.

- Configuration is different for each vehicle model. Confirm configuration of each vehicle model.

• When replacing BCM, perform the system initialization (NATS).

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) : Work Proce-
dure

INFOID:0000000009467026

SAVING VEHICLE SPECIFICATION

CONSULT

Enter "Re/Programming, Configuration" and perform “Before Replace ECU” to save or print current vehicle

specification.

NOTE:

If “Before Replace ECU” cannot be used, use the "After Replace ECU" or "Manual Configuration" after replac-

ing BCM.

BCS-6

< BASIC INSPECTION >

[BCM]

DIAGNOSIS AND REPAIR WORKFLOW

>> GO TO 2.

REPLACE BCM

Replace BCM. Refer to

BCS-79, "Removal and Installation"

>> GO TO 3.

WRITING VEHICLE SPECIFICATION

CONSULT

1. Enter "Re/Programming, Configuration".

2. If “Before Replace ECU” operation was performed, automatically an "Operation Log Selection" screen will

be displayed. Select the applicable file from the "Saved Data List" and press “Confirm” to write vehicle

specification. Refer to

BCS-6, "CONFIGURATION (BCM) : Work Procedure"

3. If “Before Replace ECU” operation was not performed, select "After Replace ECU" or "Manual Configura-

tion" to write vehicle specification. Refer to

BCS-6, "CONFIGURATION (BCM) : Work Procedure"

>> GO TO 4.

INITIALIZE BCM (NATS)

Perform BCM initialization. (NATS)

>> Work End.

CONFIGURATION (BCM)
CONFIGURATION (BCM) : Description

INFOID:0000000009467027

Vehicle specification needs to be written with CONSULT because it is not written after replacing BCM.

Configuration has three functions as follows:

CAUTION:

• When replacing BCM, you must perform “Select Saved Data List” or "After Replace ECU" with CON-

SULT.

• Complete the procedure of “Select Saved Data List” or "After Replace ECU" in order.

• If you set incorrect “Select Saved Data List” or "After Replace ECU", incidents might occur.

• Configuration is different for each vehicle model. Confirm configuration of each vehicle model.

• Never perform “Select Saved Data List” or "After Replace ECU" except for new BCM.

CONFIGURATION (BCM) : Work Procedure

INFOID:0000000009467028

WRITING MODE SELECTION

CONSULT

Select “Reprogramming, Configuration” of BCM.

When writing saved data>>GO TO 2.

When writing manually>>GO TO 3.

PERFORM “SAVED DATA LIST”

CONSULT

Automatically “Operation Log Selection” window will display if “Before Replace ECU” was performed. Select

applicable file from the “Save Data List” and press “Confirm”.

Function

Description

"Before Replace ECU"

• Reads the vehicle configuration of current BCM.
• Saves the read vehicle configuration.

"After Replace ECU"

Writes the vehicle configuration with manual selection.

"Select Saved Data List"

Writes the vehicle configuration with saved data.

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