Infiniti FX35, FX50 (S51). Manual - part 1747

B1215, B1216, B1217 LH1 SAT-SENS

SRC-153

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

3.

REPLACE SATELLITE SENSOR

1.

Replace LH satellite sensor. Refer to 

SR-23, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-152, "DTC Logic"

Is DTC detected?

YES

>> GO TO 4. 

NO

>> INSPECTION END

4.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-25, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-152, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1. 

NO

>> INSPECTION END

SRC-154

< DTC/CIRCUIT DIAGNOSIS >

B1218, B1219 DIAGNOSIS SENSOR UNIT

B1218, B1219 DIAGNOSIS SENSOR UNIT

Description

INFOID:0000000005241259

Checks the entire SRS and displays the malfunction either by illuminating or blinking the air bag warning lamp
on the combination meter. Malfunctioning part can be detected by on board self-diagnosis system and CON-
SULT-III.

OPERATION

It detects a shock that exceeds a specified level and monitors whether the driver and passenger air bags, front
side air bag, side curtain air bag and pre-tensioner seat belts operate normally. 

STRUCTURE

It contains the “G” sensors for both frontal and side collisions and spare battery function in case of main bat-
tery damage in collision.

INSTALLATION

Air bag diagnosis sensor unit is installed under the center console with fixed bolts.

DTC Logic

INFOID:0000000005241260

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “AIR BAG” Self Diagnostic Result.

 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-16, "Air Bag Warning Lamp Diagnosis"

.

NOTE:
SRS does not enter diagnosis mode if no malfunction is detected in user mode.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-119, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005241261

WARNING:

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3

minutes. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device. 

1.

CHECK HARNESS CONNECTOR

Check the harness connector.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace harness connectors.

2.

CHECK WIRING HARNESS

Check the wiring harness externals.

Is the inspection result normal?

YES

>> GO TO 3.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1218
B1219

CONTROL UNIT

Air bag diagnosis sensor unit is mal-
functioning or out of the specification

• Malfunction in air bag diagnosis sen-

sor unit

• Configuration in air bag diagnosis 

sensor unit does not match the vehi-
cles specification

B1218, B1219 DIAGNOSIS SENSOR UNIT

SRC-155

< DTC/CIRCUIT DIAGNOSIS >

C

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SRC

N

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NO

>> Replace wiring harness.

3.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-25, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-119, "DTC Logic"

.

Is DTC detected?

YES

>>  GO TO 1.

NO

>> INSPECTION END

SRC-156

< ECU DIAGNOSIS INFORMATION >

DIAGNOSIS SENSOR UNIT

ECU DIAGNOSIS INFORMATION

DIAGNOSIS SENSOR UNIT

DTC Index

INFOID:0000000005241262

Diagnostic item

Explanation

Reference page

NO DTC IS DETECT-
ED.

When malfunction is in-
dicated by the “AIR 
BAG” warning lamp in 
User mode

Low battery voltage (Less than 9 V)

SRC-29, "DTC Logic"

.

Self-diagnostic result is not erased after 
repair

SRC-16, "Air Bag Warning Lamp Diag-
nosis"

, 

SRC-20, "CONSULT-III Func-

tion"

.

Intermittent malfunction is detected in 
the past

GI-36, "Intermittent Incident"

No malfunction is detected

—

CONTROL UNIT
[B1001-B1015]

Air bag diagnosis sensor unit is malfunctioning or out of the speci-
fied specification

•

SRC-23, "DTC Logic"

.

•

SRC-25, "DTC Logic"

.

•

SRC-27, "DTC Logic"

.

OCCUPANT SENS C/U
[UNIT FAIL]
[B1017]
[B1020]
[B1021]

Malfunction occurs in Occupant Detection System control unit

SRC-29, "DTC Logic"

.

OCCUPANT SENS 
[UNIT FAIL]
[B1018]

Malfunction occurs in Occupant Detection System sensor

SRC-31, "DTC Logic"

.

OCCUPANT SENS C/U
[COMM FAIL]
[B1022]

Malfunction occurs in Occupant Detection System control unit, cir-
cuit of Occupant Detection System control unit air bag diagnosis 
sensor unit, or air bag diagnosis sensor unit

SRC-33, "DTC Logic"

.

PASS A/B INDCTR CKT
[B1023]

Front passenger air bag OFF indicator circuit is open or shorted to 
ground or the circuits are shorted each other

SRC-35, "DTC Logic"

.

OCS SENSOR
[B1025]
[B1032]
[B1048]

Malfunction occurs in Occupant Detection System control unit, cir-
cuit of Occupant Detection System control unit air bag diagnosis 
sensor unit, or air bag diagnosis sensor unit

SRC-37, "DTC Logic"

.

CONTROL UNIT
[B1026-B1031]

Air bag diagnosis sensor unit is malfunctioning or out of the speci-
fied specification

SRC-39, "DTC Logic"

.

CRASH ZONE SEN
[UNIT FAIL]
[B1033]
[B1034]

Crash zone sensor is malfunctioning

SRC-41, "DTC Logic"

.

CRASH ZONE SEN
[COMM FAIL]
[B1035]
[UNMATCH]
[B1036]

Crash zone sensor is malfunctioning or out of the specified speci-
fication

SRC-43, "DTC Logic"

.

CRASH ZONE SEN1
[B1037]
[B1039]
[B1041]

Crash zone sensor is malfunctioning

SRC-45, "DTC Logic"

.

CONTROL UNIT
[B1042-B1047]

Air bag diagnosis sensor unit is malfunctioning or out of the speci-
fied specification

SRC-47, "DTC Logic"

.

DRIVER AIRBAG MOD-
ULE
[OPEN]
[B1049] [B1054]

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

SRC-49, "DTC Logic"

.