Nissan Titan. Manual - part 523

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DIAGNOSIS AND REPAIR WORKFLOW

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

1. Check BCM for DTCs.

2. Perform the following procedure if DTC is displayed.

-

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 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.

4.

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.

5.

PERFORM DTC CONFIRMATION PROCEDURE

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

If two or more DTCs are detected, refer to 

BCS-41, "DTC Inspection Priority Chart"

 (BCM) and determine

trouble diagnosis order.
Is DTC detected?

YES

>> GO TO 8.

NO

>> Refer to 

GI-42, "Intermittent Incident"

.

6.

PERFORM BASIC INSPECTION

Perform Basic Inspection. Refer to 

SEC-6, "Basic Inspection"

.

>> GO TO 7.

7.

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE

Detect malfunctioning system according to Symptom Table based on the confirmed symptom in step 4.

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

Inspect according to Diagnostic Procedure of the system.

NOTE:

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

required for the circuit check in the Diagnostic Procedure.

>> GO TO 9.

DIAGNOSIS AND REPAIR WORKFLOW

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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 displayed, erase it.

>> GO TO 10.

10.

FINAL CHECK

When DTC was detected in step 9, perform DTC Confirmation Procedure or Component Function Check

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

When symptom was described by the customer, refer to the 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.

NO

>> Inspection End.

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PRE-INSPECTION FOR DIAGNOSTIC

PRE-INSPECTION FOR DIAGNOSTIC

Basic Inspection

INFOID:0000000009878851

1.

INSPECTION START

Turn ignition switch “OFF”.

NOTE:

Before starting operation check, open front windows.

>> GO TO 2.

2.

CHECK SECURITY INDICATOR LAMP

1. Lock doors using keyfob or ignition key.

2. Check that security indicator lamp illuminates for 30 seconds.
Does security indicator lamp illuminate?

YES

>> GO TO 3.

NO

>> Perform diagnosis and repair. Refer to 

SEC-35, "Component Function Check"

.

3.

CHECK ALARM FUNCTION

1. After 30 seconds, security indicator lamp will start to blink.

2. Open any door before unlocking with keyfob or ignition key.
Does the alarm function properly?

YES

>> GO TO 4.

NO

>> Check the following.

• The vehicle security system does not phase in alarm mode. Refer to 

SEC-68, "Symptom Table"

.

• Alarm (horn and headlamp do not operate. Refer to 

SEC-68, "Symptom Table"

.

4.

CHECK ALARM CANCEL OPERATION

Unlock driver door using keyfob or ignition key.
Does the alarm (horn, headlamp and hazard lamp) stop?

YES

>> Inspection End.

NO

>> Check door lock function. Refer to 

DLK-11, "DOOR LOCK AND UNLOCK SWITCH : System

Description"

.

INSPECTION AND ADJUSTMENT

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INSPECTION AND ADJUSTMENT

ECM RE-COMMUNICATING FUNCTION
ECM RE-COMMUNICATING FUNCTION : Description

INFOID:0000000009878852

Performing following procedure can automatically perform re-communication of ECM and BCM, but only when

the ECM has been replaced with a new one (*1).

*1: New one means an ECM which has never been energized on-board.

(In this step, initialization procedure by CONSULT is not necessary)

NOTE:

• When replacing an ECM that is not brand new, refer to CONSULT Immobilizer mode and follow the

on-screen instructions.

• If multiple keys are attached to the key holder, separate them before work.

• Distinguish keys with unregistered key ID from those with registered ID.

ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement

INFOID:0000000009878853

1.

PERFORM ECM RE-COMMUNICATING FUNCTION

1. Install ECM.

2. Using a registered key (*2), turn ignition switch to “ON”.

*2: To perform this step, use the key that has been used before performing ECM replacement.

3. Maintain ignition switch in “ON” position for at least 5 seconds.

4. Turn ignition switch to “OFF”.

5. Start engine.
Can engine be started?

YES

>> Procedure is completed.

NO

>> Initialize control unit. Refer to CONSULT Immobilizer mode and follow the on-screen instructions.