Nissan Pathfinder (2008 year). Manual - part 634

WCS-62

< ECU DIAGNOSIS >

BCM (BODY CONTROL MODULE)

ALMIA0281GB

WCS

BCM (BODY CONTROL MODULE)

WCS-63

< ECU DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

DTC Inspection Priority Chart

INFOID:0000000001717127

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.

ALMIA0282GB

WCS-64

< ECU DIAGNOSIS >

BCM (BODY CONTROL MODULE)

DTC Index

INFOID:0000000001717128

NOTE:

Details of time display

• CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni-

tion switch OFF 

→

 ON again.

• 1 - 39: Displayed if any previous malfunction is present when current condition is normal. It increases like 1

→

 2 

→

 3...38 

→

 39 after returning to the normal condition whenever ignition switch OFF 

→

 ON. The counter

remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch
OFF 

→

 ON after returning to the normal condition if the malfunction is detected again.

Priority

DTC

1

• U1000: CAN COMM CIRCUIT
• U1010: CONTROL UNIT (CAN)

2

• B2190: NATS ANTENNA AMP
• B2191: DIFFERENCE OF KEY
• B2192: ID DISCORD BCM-ECM
• B2193: CHAIN OF BCM-ECM
• B2013: STRG COMM 1
• B2552: INTELLIGENT KEY
• B2590: NATS MALFUNCTION

3

• C1729: VHCL SPEED SIG ERR

4

• C1704: LOW PRESSURE FL
• C1705: LOW PRESSURE FR
• C1706: LOW PRESSURE RR
• C1707: LOW PRESSURE RL
• C1708: [NO DATA] FL
• C1709: [NO DATA] FR
• C1710: [NO DATA] RR
• C1711: [NO DATA] RL
• C1712: [CHECKSUM ERR] FL
• C1713: [CHECKSUM ERR] FR
• C1714: [CHECKSUM ERR] RR
• C1715: [CHECKSUM ERR] RL
• C1716: [PRESSDATA ERR] FL
• C1717: [PRESSDATA ERR] FR
• C1718: [PRESSDATA ERR] RR
• C1719: [PRESSDATA ERR] RL
• C1720: [CODE ERR] FL
• C1721: [CODE ERR] FR
• C1722: [CODE ERR] RR
• C1723: [CODE ERR] RL
• C1724: [BATT VOLT LOW] FL
• C1725: [BATT VOLT LOW] FR
• C1726: [BATT VOLT LOW] RR
• C1727: [BATT VOLT LOW] RL

CONSULT display

Fail-safe

Intelligent Key 

warning lamp ON

Tire pressure 

monitor warning 

lamp ON

Reference page

No DTC is detected.
further testing
may be required.

—

—

—

—

U1000: CAN COMM CIRCUIT

—

—

—

BCS-30

U1010: CONTROL UNIT (CAN)

—

—

—

BCS-31

B2013: STRG COMM 1

—

—

—

SEC-27

B2190: NATS ANTTENA AMP

—

—

—

SEC-30

 (with I-

Key), 

SEC-111

 

(without I-Key)

WCS

BCM (BODY CONTROL MODULE)

WCS-65

< ECU DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

B2191: DIFFERENCE OF KEY

—

—

—

SEC-33

 (with I-

Key), 

SEC-114

 

(without I-Key)

B2192: ID DISCORD BCM-ECM

—

—

—

SEC-34

 (with I-

Key), 

SEC-115

 

(without I-Key)

B2193: CHAIN OF BCM-ECM

—

—

—

SEC-36

 (with I-

Key), 

SEC-117

 

(without I-Key)

B2552: INTELLIGENT KEY

—

—

—

SEC-38

B2590: NATS MALFUNCTION

—

—

—

SEC-39

C1708: [NO DATA] FL

—

—

—

WT-13

C1709: [NO DATA] FR

—

—

—

WT-13

C1710: [NO DATA] RR

—

—

—

WT-13

C1711: [NO DATA] RL

—

—

—

WT-13

C1712: [CHECKSUM ERR] FL

—

—

—

WT-15

C1713: [CHECKSUM ERR] FR

—

—

—

WT-15

C1714: [CHECKSUM ERR] RR

—

—

—

WT-15

C1715: [CHECKSUM ERR] RL

—

—

—

WT-15

C1716: [PRESSDATA ERR] FL

—

—

—

WT-17

C1717: [PRESSDATA ERR] FR

—

—

—

WT-17

C1718: [PRESSDATA ERR] RR

—

—

—

WT-17

C1719: [PRESSDATA ERR] RL

—

—

—

WT-17

C1720: [CODE ERR] FL

—

—

—

WT-15

C1721: [CODE ERR] FR

—

—

—

WT-15

C1722: [CODE ERR] RR

—

—

—

WT-15

C1723: [CODE ERR] RL

—

—

—

WT-15

C1724: [BATT VOLT LOW] FL

—

—

—

WT-15

C1725: [BATT VOLT LOW] FR

—

—

—

WT-15

C1726: [BATT VOLT LOW] RR

—

—

—

WT-15

C1727: [BATT VOLT LOW] RL

—

—

—

WT-15

C1729: VHCL SPEED SIG ERR

—

—

—

WT-18

C1734: CONTROL UNIT

—

—

—

—

CONSULT display

Fail-safe

Intelligent Key 

warning lamp ON

Tire pressure 

monitor warning 

lamp ON

Reference page

WCS-66

< SYMPTOM DIAGNOSIS >

THE LIGHT REMINDER WARNING DOES NOT SOUND

SYMPTOM DIAGNOSIS

THE LIGHT REMINDER WARNING DOES NOT SOUND

Description

INFOID:0000000001712871

Light reminder warning does not sound even though headlamp is illuminated.

Diagnosis Procedure

INFOID:0000000001712872

1.

CHECK COMBINATION SWITCH (LIGHTING SWITCH) OPERATION

Check that the headlamps operate normally by operating the combination switch (lighting switch).

Do they operate normally?

YES

>> GO TO 2

NO

>> Refer to 

EXL-4, "Work Flow"

.

2.

CHECK FRONT DOOR SWITCH LH SIGNAL CIRCUIT

Perform inspection of the front door switch LH signal circuit. Refer to 

DLK-48, "Diagnosis Procedure"

 (with

Intelligent Key) or 

DLK-214, "Diagnosis Procedure"

 (without Intelligent Key).

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair harness or connector.

3.

CHECK FRONT DOOR SWITCH LH

Perform a unit inspection for the front door switch LH. Refer to 

DLK-48, "Diagnosis Procedure"

 (with Intelligent

Key) or 

DLK-214, "Diagnosis Procedure"

 (without Intelligent Key).

Is the inspection result normal?

YES

>> Replace the BCM. Refer to 

BCS-54, "Removal and Installation"

.

NO

>> Replace the front door switch LH.

WCS

THE SEAT BELT WARNING CONTINUES SOUNDING, OR DOES NOT SOUND

WCS-67

< SYMPTOM DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

THE SEAT BELT WARNING CONTINUES SOUNDING, OR DOES NOT
SOUND

Description

INFOID:0000000001712873

• Seat belt warning does not sound even though driver seat belt is not fastened.
• Seat belt warning sounds even though driver seat belt is fastened.

Diagnosis Procedure

INFOID:0000000001712874

1.

CHECK WARNING CHIME OPERATION

1.

With key removed from key switch and the front door LH open, turn lighting switch to 1st or 2nd position.

2.

Return lighting switch to off position, and insert key into key switch.

Does warning chime sound for both steps?

YES

>> GO TO 2

NO

>> Replace combination meter. Refer to 

MWI-94, "Removal and Installation"

.

2.

CHECK SEAT BELT WARNING LAMP

1.

Turn ignition switch ON.

2.

Check the operation of the seat belt warning lamp in the combination meter.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-54, "Removal and Installation"

.

NO

>> GO TO 3

3.

CHECK SEAT BELT BUCKLE SWITCH CIRCUIT

Perform inspection of the seat belt buckle switch circuit. Refer to 

WCS-19, "Diagnosis Procedure"

. 

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair harness or connector.

4.

CHECK SEAT BELT BUCKLE SWITCH UNIT

Perform a unit inspection for the seat belt buckle switch. Refer to 

WCS-20, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace the combination meter. Refer to 

MWI-94, "Removal and Installation"

.

NO

>> Replace the seat belt buckle switch LH.

Seat belt fastened

: OFF

Seat belt not fastened

: ON

WCS-68

< SYMPTOM DIAGNOSIS >

THE KEY WARNING DOES NOT SOUND

THE KEY WARNING DOES NOT SOUND

Description

INFOID:0000000001712875

Key warning does not sound even though key is in ignition and front door LH is opened.

Diagnosis Procedure

INFOID:0000000001712876

1.

CHECK WARNING CHIME OPERATION

With key removed from the ignition and the front door LH open, turn the lighting switch to 1st or 2nd position.

Does warning chime sound?

YES

>> GO TO 2

NO

>> Replace combination meter. Refer to 

MWI-94, "Removal and Installation"

.

2.

CHECK KEY SWITCH CIRCUIT 

Perform inspection of the key switch circuit. Refer to 

WCS-21, "Diagnosis Procedure"

 (with Intelligent Key) or

WCS-23, "Diagnosis Procedure"

 (without Intelligent Key).

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair harness or connector.

3.

CHECK KEY SWITCH

Perform a unit inspection for the key switch. Refer to 

WCS-22, "Component Inspection"

 (with Intelligent Key)

or 

WCS-24, "Component Inspection"

 (without Intelligent Key).

Is the inspection result normal?

YES

>> Replace the BCM. Refer to 

BCS-54, "Removal and Installation"

.

NO

>> Replace the key switch and ignition knob switch (with Intelligent Key) or key switch (without Intelli-

gent Key).

WCS

PRECAUTIONS

WCS-69

< PRECAUTION >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

PRECAUTION

PRECAUTIONS

Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSION-
ER"

INFOID:0000000001555022

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.

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

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.