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Nissan Pathfinder (2008 year). Manual - part 566

SRC-10

< FUNCTION DIAGNOSIS >

OCCUPANT CLASSIFICATION SYSTEM

OCCUPANT CLASSIFICATION SYSTEM

System Diagram

INFOID:0000000001277717

Occupant Classification System (OCS)

INFOID:0000000001277786

The occupant classification system (OCS) identifies different size occupants, out of position occupants, and
detects if child seat is present in the front passenger seat. The OCS receives inputs from the occupant classi-
fication sensor (located inside the passenger seat cushion assembly) and belt tension sensor (part of the pas-
senger front seat belt assembly and located at the belt anchor location). Depending on classification of the
passenger, the OCS sends a signal to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit
uses this signal and the seat belt buckle switch RH signal to determine deployment or non deployment of the
passenger front air bag in the event of a collision. Depending on the signals received, the air bag diagnosis
sensor unit can disable the passenger front air bag completely.
NOTE:
In case of customer concern, CONSULT-II can be used to confirm the passenger air bag status (readiness).

Passenger Air Bag Status Conditions

NOTE:

ALHIA0042GB

Front Passenger Seat

(Condition)

PASS AIR BAG OFF Indicator

(Status)

Passenger Air Bag Status

(Readiness)

CONSULT-II Display

Seat occupied

OFF

Active (enabled)

Seat occupied

NOTE

Deactivated (disabled)

OFF

Seat empty

OFF

Deactivated (disabled)

OFF

OCCUPANT CLASSIFICATION SYSTEM

SRC-11

< FUNCTION DIAGNOSIS >

SRC

Passenger does not meet Occupant Classification System specifications for passenger air bag activation.

WHIA0195E

SRC-12

< FUNCTION DIAGNOSIS >

PASSENGER SEAT BELT WARNING SYSTEM

PASSENGER SEAT BELT WARNING SYSTEM

System Diagram

INFOID:0000000001277719

System Description

INFOID:0000000001277720

The passenger seat belt warning system will remind the driver if the
driver or front passenger seat belt should be buckled by turning on
the seat belt warning light (1). The system works in conjunction with
the occupant classification system. Refer to

SRC-10, "Occupant

Classification System (OCS)"

Passenger Seat Belt Warning System Operation

Component Parts Location

INFOID:0000000001277721

Refer to

SRC-7, "SRS Component Parts Location"

ALHIA0028GB

ALHIA0043ZZ

Driver seat status
(Ignition switch ON)

Passenger seat status

Seat belt buckle switch
LH status

Seat belt buckle switch
RH status

Seat belt warning lamp

Seat occupied

Buckled

Off

Unbuckled

Seat unoccupied

—

Off

—

Unbuckled

ON BOARD DIAGNOSTIC (OBD) SYSTEM

SRC-13

< FUNCTION DIAGNOSIS >

SRC

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Trouble Diagnosis Introduction

INFOID:0000000001277722

CAUTION:

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to do so in

this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness con-
nectors.

• Do not attempt to repair, splice or modify SRS wiring harnesses. If a harness is damaged, replace it

with a new one.

• Keep ground connections clean.

DIAGNOSIS FUNCTION

The SRS self-diagnosis results can be read by using “AIR BAG” warning lamp and/or CONSULT-III.
The User mode is exclusively prepared for the customer (driver). This mode warns the driver of a system mal-
function through the operation of the “AIR BAG” warning lamp.
The Diagnosis mode allows the technician to locate and inspect the malfunctioning part.
The mode applications for the “AIR BAG” warning lamp and CONSULT-III are as follows:

HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR

A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malfunction. It is important to fully understand the symp-
toms or conditions for a customer complaint.

Information From Customer

WHAT - Vehicle model
WHEN - Date, Frequencies
WHERE - Road conditions
HOW - Operating conditions, Symptoms

Preliminary Check

Check that the following parts are in good order.
• Battery
• Fuses
• System component-to-harness connections

SRS Operation Check

INFOID:0000000001277723

DIAGNOSTIC PROCEDURE 1

Checking SRS Operation Using “AIR BAG” Warning Lamp—User Mode

Turn the ignition switch from OFF to ON, and check that the air bag warning lamp blinks.

Compare the SRS air bag warning lamp blinking pattern with the
examples.

User mode

Diagnosis mode

Display type

“AIR BAG” warning lamp

ON-OFF operation

CONSULT-III

—

Monitoring

BF-1845D

SRC-14

< FUNCTION DIAGNOSIS >

ON BOARD DIAGNOSTIC (OBD) SYSTEM

SRS Air bag warning lamp examples

DIAGNOSTIC PROCEDURE 2

Connect CONSULT-III.

Diagnostic code is displayed on "SELF-DIAG [CURRENT]".
If no malfunction is detected on "SELF-DIAG [CURRENT]", but malfunction is detected in "SRS Operation
Check" using the "AIR BAG" warning lamp, the following cases may exist:
• "SELF-DIAG [PAST]" memory might not be erased.
• The SRS system malfunctions intermittently.
Perform DIAGNOSTIC PROCEDURE 4. Refer to

SRC-15, "Self-Diagnosis Function (Without CONSULT-

III)"

“AIR BAG” warning lamp (User mode)

SRS condition

Reference item

• No malfunction is detected.
• No further action is necessary.

—

The system is malfunctioning and
needs to be repaired as indicated.

Go to DIAGNOSTIC PROCEDURE
2 that follows (with CONSULT-III) or

SRC-15, "Trouble Diagnosis without
CONSULT-III"

(without CONSULT-

III).

• Air bag is deployed.
• Seat belt pre-tensioner is deployed.

Go to COLLISION DIAGNOSIS

SR-

17, "For Frontal Collision"

SR-18,

"For Side and Rollover Collision"

• Air bag diagnosis sensor unit is mal-

functioning.

• Air bag power supply circuit is mal-

functioning.

• SRS air bag warning lamp circuit is

malfunctioning.

Go to

SRC-84, ""AIR BAG" Warning

Lamp Does Not Turn Off"

• Air bag diagnosis sensor unit is mal-

functioning.

• Air bag warning lamp circuit is mal-

functioning.

Go to

SRC-84, ""AIR BAG" Warning

Lamp Does Not Turn On"

SHIA0011E

SHIA0012E

SHIA0013E

SHIA0014E

ON BOARD DIAGNOSTIC (OBD) SYSTEM

SRC-15

< FUNCTION DIAGNOSIS >

SRC

Trouble Diagnosis without CONSULT-III

INFOID:0000000001277724

DIAGNOSTIC PROCEDURE 6

Inspect SRS Malfunction Using "AIR BAG" Warning Lamp—Diagnosis Mode

NOTE:
SRS will not enter Diagnosis mode if no malfunction is detected in User mode.

Turn ignition switch ON.

After “AIR BAG” warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.

Wait more than 3 seconds.

Repeat steps 1 to 3 two more times (3 times total).

Turn ignition switch ON.

SRS is now in Diagnosis mode. Refer to

SRC-80, "Trouble Diagnosis without CONSULT-III"

CONSULT-III Function (AIR BAG)

INFOID:0000000001277787

CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.

Self-Diagnosis Function (Without CONSULT-III)

INFOID:0000000001277726

• The reading of these results is accomplished using one of two modes — “User mode” and “Diagnosis

mode”.

• After a malfunction is repaired, turn the ignition switch OFF for at least one second, then back ON. Diagnosis

mode returns to the User mode. At that time, the self-diagnostic result is cleared.

AIR BAG diagnostic mode

Description

SELF-DIAG [CURRENT]

A current Self-diagnosis result (also indicated by the number of warning lamp flashes in the Diagnosis
mode) is displayed on the CONSULT-III screen in real time. This refers to a malfunctioning part requir-
ing repairs.

SELF-DIAG [PAST]

Diagnosis results previously stored in the memory are displayed on the CONSULT-III screen. The
stored results will remain until memory erasing is executed.

TROUBLE DIAG RECORD

With TROUBLE DIAG RECORD, diagnosis results previously erased by a reset operation can be dis-
played on the CONSULT-III screen.

ECU DISCRIMINATED NO.

The air bag diagnosis sensor unit for each vehicle model is assigned with its own, individual classifica-
tion number. This number will be displayed on the CONSULT-III screen, as shown. When replacing the
air bag diagnosis sensor unit, refer to the part number for the compatibility. After installation, replace-
ment with a correct unit can be checked by confirming this classification number on the CONSULT-III
screen.
The air bag diagnosis sensor unit discriminated numbers assigned are F64F (for models with
side and side front curtain air bags) and F64E (for models without side and side front curtain air
bags).

PASSENGER AIR BAG

The STATUS (readiness) of the front passenger air bag module is displayed. The STATUS displayed
(ON/OFF) depends on the signals supplied to the occupant classification system control module and
air bag diagnosis sensor unit. Refer to

SRC-10, "Occupant Classification System (OCS)"

for more in-

formation.

SRC-16

< FUNCTION DIAGNOSIS >

ON BOARD DIAGNOSTIC (OBD) SYSTEM

HOW TO CHANGE SELF-DIAGNOSIS MODE

DIAGNOSTIC PROCEDURE 3

Final Check of SRS Using CONSULT-III—Diagnosis Mode

Connect CONSULT-III.

If no DTC is detected on “SELF-DIAG [CURRENT]”, repair of SRS is completed. Go to step 3.
If any DTC is detected on “SELF-DIAG [CURRENT]”, the malfunctioning part has not been repaired com-
pletely or another malfunctioning part is being detected. Perform DIAGNOSTIC PROCEDURE 2. Refer to

SRC-13, "SRS Operation Check"

Touch “ERASE”.
NOTE:
Touch “ERASE” to clear the memory of the malfunction (“SELF-DIAG [PAST]”).
If the memory of the malfunction in “SELF-DIAG [PAST]” is not erased, the User mode shows the system
malfunction by the operation of the warning lamp even if the malfunction is repaired completely.

Touch “BACK” key of CONSULT-III. Touch “SELF-DIAG [PAST]”.

Check that no malfunction is detected on “SELF-DIAG [PAST]”.

Touch “BACK” key of CONSULT-III to return to User mode from Diagnosis mode.

Turn ignition switch OFF and then turn off and disconnect CONSULT-III.

Go to

SRC-13, "SRS Operation Check"

DIAGNOSTIC PROCEDURE 4

Check SRS Repair History

CONSIDER POSSIBILITY THAT SELF-DIAGNOSTIC RESULT WAS NOT ERASED AFTER REPAIR

Check repair history of the SRS.

Have any previous repairs been made to the SRS?

Yes

>> Self-diagnostic result “SELF-DIAG [PAST]” (previously stored in the memory) might not be erased

after repair. Perform DIAGNOSTIC PROCEDURE 3. Refer to

SRC-15, "Self-Diagnosis Function

(Without CONSULT-III)"

>> Perform DIAGNOSTIC PROCEDURE 2. Refer to

SRC-13, "SRS Operation Check"

SHIA0183E

B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

SRC-17

< COMPONENT DIAGNOSIS >

SRC

COMPONENT DIAGNOSIS

B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

Description

INFOID:0000000001277727

DTC B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

The driver air bag module is dual stage and wired to the air bag diagnosis sensor unit through the spiral cable.
The air bag diagnosis sensor unit will monitor for opens and shorts in detected lines to the driver air bag mod-
ule including the spiral cable.

PART LOCATION

Refer to

SRC-7, "SRS Component Parts Location"

DTC Logic

INFOID:0000000001277728

DTC DETECTION LOGIC

With CONSULT-lll

Without CONSULT-lll

DTC CONFIRMATION PROCEDURE (With CONSULT-lll)

CONSULT-III name

DTC

DTC detecting condition

Repair order

DRIVER AIRBAG MODULE

[OPEN]

B1049

Driver air bag module circuit (DR1) is open
(including the spiral cable).

Visually check the wiring harness connection.

Replace the harness if it has visible damage.

Replace the driver air bag module.

Replace the spiral cable.

Replace the air bag diagnosis sensor unit.

Replace the related harness.

B1054

Driver air bag module circuit (DR2) is open
(including the spiral cable).

DRIVER AIRBAG MODULE

[VB-SHORT]

B1050

Driver air bag module circuit (DR1) is
shorted to a power supply circuit
(including the spiral cable).

B1055

Driver air bag module circuit (DR2) is
shorted to a power supply circuit
(including the spiral cable).

DRIVER AIRBAG MODULE

[GND-SHORT]

B1051

Driver air bag module circuit (DR1) is
shorted to ground
(including the spiral cable).

B1056

Driver air bag module circuit (DR2) is
shorted to ground
(including the spiral cable).

DRIVER AIRBAG MODULE

[SHORT]

B1052

Driver air bag module circuits (DR1) are
shorted to each other
(including the spiral cable).

B1057

Driver air bag module circuits (DR2) are
shorted to each other
(including the spiral cable).

WHIA0260E

Content .. 564 565 566 567 ..