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Nissan Titan. Manual - part 74

DIAGNOSIS AND REPAIR WORKFLOW

DLK-5

< BASIC INSPECTION >

DLK

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 (Print them out with 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.
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

DLK-71, "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 7.

>> Refer to

GI-42, "Intermittent Incident"

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS

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.

>> GO TO 7.

DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

Inspect according to Diagnostic Procedure of the system.

NOTE:

DLK-6

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

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 8.

>> 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 9.

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 7.

YES (Symptom remains)>>GO TO 6.

>> Inspection End.

AUTOMATIC DOOR LOCKS

DLK-7

< SYSTEM DESCRIPTION >

DLK

SYSTEM DESCRIPTION

AUTOMATIC DOOR LOCKS

System Diagram

INFOID:0000000009878740

System Description

INFOID:0000000009878741

DOOR LOCK FUNCTION

• The door lock and unlock switch (driver side) is built into power window main switch.

• The door lock and unlock switch (passenger side) is on door trim.

• Interlocked with the locking operation of door lock and unlock switch, door lock actuators of all doors are

locked.

• Interlocked with the unlocking operation of door lock and unlock switch, door lock actuators of all doors are

unlocked.

Door Key Cylinder

• With the door key inserted in the door key cylinder on driver side, turning it to “LOCK”, will lock door lock

actuator of all doors.

• With the door key inserted in the door key cylinder on driver side, turning it to “UNLOCK” once unlocks the

driver side door lock actuator; turning it to “UNLOCK” again within 5 seconds after the first unlock operation

unlocks all of the other doors. - (SELECTIVE UNLOCK OPERATION)

Selective unlock operation mode can be changed using “DOOR LOCK-UNLOCK SET” mode in “WORK SUP-

PORT”. Refer to

DLK-19, "DOOR LOCK : CONSULT Function (BCM - DOOR LOCK)"

AUTOMATIC DOOR LOCKS (LOCK OPERATION)

The automatic door locks function is the function that locks all doors linked with the vehicle speed or shift posi-

tion. It has 2 types as follows.

Vehicle Speed Sensing Auto Door Lock*1

All doors are locked when the vehicle speed reaches 24 km/h (15 MPH) or more.

BCM outputs the lock signal to all door lock actuators when it detects that the ignition switch is turned ON, all

doors are closed and the vehicle speed received from the combination meter via CAN communication

becomes 24 km/h (15 MPH) or more.

ALKIA1482GB

Input

Single

Function

Actuator

Door lock/unlock switch

Door lock/unlock signal

Door lock function

Each door lock actuator

Door key cylinder switch

Each door switch

Door open/close signal

Key reminder function

Combination meter

Warning buzzer signal

Vehicle speed signal

Automatic door lock/unlock
function

TCM

Shift position signal

DLK-8

< SYSTEM DESCRIPTION >

AUTOMATIC DOOR LOCKS

If a door is opened and closed at any time during one ignition cycle (OFF

→ ON), even after initial auto door

lock has taken place, the BCM will relock all doors when the vehicle speed reaches 24 km/h (15 MPH) or more

again.

P Range Interlock Door Lock

All doors are locked when shifting the selector lever from the P position to any position other than P.

BCM outputs the lock signal to all door lock actuators when it detects that the ignition switch is in the ON posi-

tion and the shift signal received from the TCM via CAN communication is shifted from the P position to any

position other than P.

Setting change of Automatic Door Locks (LOCK) Function

The LOCK operation setting of the automatic door locks function can be changed.

With CONSULT

The ON/OFF switching of the automatic door locks (LOCK) function and the type selection of the automatic

door locks (LOCK) function can be performed at the WORK SUPPORT setting of CONSULT. Refer to

DLK-19,

"DOOR LOCK : CONSULT Function (BCM - DOOR LOCK)"

Without CONSULT

The automatic door locks (LOCK) function can be switched ON/OFF by performing the following operation.
1. Close all doors (door switch OFF).
2. Turn ignition switch ON.
3. Within 20 seconds of turning the ignition switch ON, press and hold the door lock and unlock switch to the

LOCK position for more than 5 seconds.

4. The switching is completed when the hazard lamps blink.

5. The ignition switch must be turned OFF and ON again between each setting change.

AUTOMATIC DOOR LOCKS (UNLOCK OPERATION)

The automatic door locks (UNLOCK) function is the function that unlocks all doors linked with the key position

or shift position. It has 2 types as follows.

IGN OFF Interlock Door Unlock*1

All doors are unlocked when the power supply position is changed from ON to OFF.

BCM outputs the unlock signal to all door lock actuators when it detects that the power supply position is

changed from ignition switch ON to OFF.

P Range Interlock Door Unlock

All doors are unlocked when shifting the selector lever from any position other than the P to P position.

BCM outputs the unlock signal to all door lock actuators when it detects that the ignition switch is in the ON

position and the shift signal received from TCM via CAN communication is shifted from any position other than

the P to P position.

Setting change of Automatic Door Locks (UNLOCK) Function

The UNLOCK operation setting of the automatic door locks function can be changed.

With CONSULT

The ON/OFF switching of the automatic door locks (UNLOCK) function and the type selection of the automatic

door locks (UNLOCK) function can be performed at the WORK SUPPORT setting of CONSULT. Refer to

DLK-

19, "DOOR LOCK : CONSULT Function (BCM - DOOR LOCK)"

Without CONSULT

The automatic door locks (UNLOCK) function can be switched ON/OFF by performing the following operation.
1. Close all doors (door switch OFF).
2. Turn ignition switch ON.
3. Within 20 seconds of turning the ignition switch ON, press and hold the door lock and unlock switch to the

UNLOCK position for more than 5 seconds.

4. The switching is completed when the hazard lamps blink.

OFF

→ ON

: 2 blinks

→ OFF

: 1 blink

OFF

→ ON

: 2 blinks

→ OFF

: 1 blink

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