Infiniti G37 Coupe. Manual - part 1220

SRC-130

< COMPONENT DIAGNOSIS >

B1209 FRONTAL COLLISION DETECTION

Check front air bag module. (driver air bag module and/or passenger air bag module.)

Is the front air bag module deployed?

YES

>> Replace front air bag module.

NO

>> GO TO 2.

2.

CHECK FRONT SEAT BELT PRE-TENSIONER

Check front seat belt pre-tensioner.

Is the front seat belt pre-tensioner activated?

YES

>> Replace front seat belt pre-tensioner.

NO

>> GO TO 3.

3.

CHECK DIAGNOSIS SENSOR UNIT

Check diagnosis sensor unit.
Is the front air bag module and/or front seat belt pre-tensioner activated?

YES

>> Replace diagnosis sensor unit (ACU).

NO

>> GO TO 4.

4.

CHECK STEERING WHEEL

Check steering wheel.

Is the steering wheel normal?

YES

>> GO TO 5.

NO

>> Replace steering wheel.

5.

CHECK SPIRAL CABLE

1.

Check the continuity of spiral cable.Refer to 

SRC-42, "Diagnosis Procedure (Component diagnosis)"

.

2.

Operate the steering wheel to check excessive heavy operation force, abnomal noise or damage.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace spiral cable.

6.

CHECK WIRING HARNESS

Check wiring harness.

Is the wiring harness normal?

YES

>> GO TO 7.

NO

>> Repair or replace wiring harness/harness connector.

7.

FINAL CHECK

Check the screen of CONSULT-III and/or Air bag warning lamp status.
Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Check the intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

B1210 SIDE COLLISION DETECTION

SRC-131

< COMPONENT DIAGNOSIS >

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B1210 SIDE COLLISION DETECTION

Description

INFOID:0000000001694647

DTC B1210 SIDE COLLISION DETECTION

Detects component damage resulting from a side collision, brinks or illuminates the air bag warning lamp to
inform the driver. Malfunctioning part can be detected by the CONSULT-III.

OPERATION

The side air bag and curtain air bag are operated by the decision of the diagnosis sensor unit (ACU) signal of
the side collision.

STRUCTURE

It consists of satellite sensor, diagnosis sensor unit (ACU), front side air bag and side curtain air bag. 

INSTALLATION

Refer to 

SR-15, "Removal and Installation"

, 

SR-16, "Removal and Installation"

, 

SR-12, "Removal and Installa-

tion"

.

DTC Logic

INFOID:0000000001694648

DTC DETECTION LOGIC

With CONSULT-lll

DTC No. Index (“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)

DTC CONFIRMATION PROCEDURE (With CONSULT-lll)

1.

INSPECTION START

Turn ignition switch ON.

>> GO TO 2.

2.

CHECK SELF-DIAG RESULT

Check the screen of CONSULT-lll.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-131, "Diagnosis Procedure (Component diagnosis)"

.

NO

>> INSPECTION END.

Diagnosis Procedure (Component diagnosis)

INFOID:0000000001694649

With CONSULT-lll

WARNING:

• Before servicing, turn ignition switch OFF, disconnect both battery terminals and wait at least 3 min-

utes. (To discharge backup capacitor)

• Do not use unspecified tester or other measuring device. 

DIAGNOSTIC PROCEDURE

1.

CHECK FRONT SIDE AIR BAG MODULE

Check for front side air bag module.

Is the front side air bag module deployed?

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1210

SIDE COLLISION DE-
TECTION

Front side air bag, side curtain air bag is 
deployed.

—

SRC-132

< COMPONENT DIAGNOSIS >

B1210 SIDE COLLISION DETECTION

YES

>> Replace front side air bag module.

NO

>> GO TO 2.

2.

CHECK SIDE CURTAIN AIR BAG MODULE

Check for side curtain air bag module.

Is the side curtain air bag module deployed?

YES

>> Replace side curtain air bag module.

NO

>> GO TO 3.

3.

CHECK SATELLITE SENSOR

Check for satellite sensor.

Is the front side air bag module and/or side curtain air bag module deployed?

YES

>> Replace satellite sensor.

NO

>> GO TO 4.

4.

CHECK DIAGNOSIS SENSOR UNIT

Check for diagnosis sensor unit.
Is the front side air bag module and/or side curtain air bag module deployed?

YES

>> Replace diagnosis sensor unit (ACU).

NO

>> GO TO 5.

5.

FINAL CHECK

Check the screen of CONSULT-III and/or Air bag warning lamp status.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Check the intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

DIAGNOSIS SENSOR UNIT

SRC-133

< ECU DIAGNOSIS >

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ECU DIAGNOSIS

DIAGNOSIS SENSOR UNIT

DTC Index

INFOID:0000000001694650

DTC No. Index (With CONSULT-lll)

(“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)
NOTE:
Follow the procedures in numerical order when repairing malfunctioning parts. Confirm whether malfunction is
eliminated using air bag warning lamp or CONSULT-IlI each time repair is completed. If malfunction is still
observed, proceed to the next step. When malfunction is eliminated, further repair work is not required.    

Diagnostic item

Explanation

Repair order

“Recheck SRS at each replacement”

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)

• Self-diagnosis result “SELF-DIAG 

[PAST]” (previously stored in the 
memory) might not be erased after re-
pair.

• Intermittent malfunction has been de-

tected in the past.

• Go  to 

SRC-15, "Diagnosis Descrip-

tion"

.

• No malfunction is detected.

—

CONTROL UNIT
[B1001-B1015]

• Diagnosis sensor is out of order.

• Replace diagnosis sensor unit 

(ACU).

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

• Trouble occurs in OCS-CU.

1.

Repair or replace wiring harness /
harness connector.

2.

Replace front passenger seat 
cushion and occupant classifica-
tion system control unit as an as-
semly.

3.

Replace diagnosis sensor unit 
(ACU).

OCCUPANT SENS 
[UNIT FAIL]
[B1018]

• Trouble occurs in OCS-SENS.

1.

Repair or replace wiring harness /
harness connector.

2.

Replace front passenger seat 
cushion and occupant classifica-
tion system control unit as an as-
semly.

3.

Replace diagnosis sensor unit 
(ACU).

OCCUPANT SENS C/U
[COMM FAIL]
[B1022]

• Trouble occurs in OCS-CU, circuit of OCS-CU~ACU, or ACU.

1.

Repair or replace wiring harness /
harness connector.

2.

Replace front passenger seat 
cushion and occupant classifica-
tion system control unit as an as-
semly.

3.

Replace diagnosis sensor unit 
(ACU).

PASS A/B INDCTR CKT
[B1023]

• Cut-off telltale circuit is open or shorted to ground or the circuits 

are shorted each other.

1.

Repair or replace wiring harness /
harness connector.

2.

Replace passenger air bag off in-
dicator.

3.

Replace diagnosis sensor unit 
(ACU).

CONTROL UNIT
[B1026-B1031]

• Diagnosis sensor is out of order.

• Replace diagnosis sensor unit 

(ACU).