Nissan Sentra. Manual — part 816
B14XX AIR BAG DIAGNOSIS SENSOR UNIT
SRC-99
< DTC/CIRCUIT DIAGNOSIS >
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B14XX AIR BAG DIAGNOSIS SENSOR UNIT
Description
INFOID:0000000009758012
DTC B14XX AIR BAG DIAGNOSIS SENSOR UNIT
The air bag diagnosis sensor unit will run self diagnostics when the ignition switch is turned ON. It has the
potential to set many diagnostic trouble codes which will conform to the B14XX format, but will not match any
other SRS diagnostic trouble codes. Refer to
SRC-17, "CONSULT Function (AIR BAG)"
.
PART LOCATION
SRC-5, "Component Parts Location"
.
DTC Logic
INFOID:0000000009758013
DTC DETECTION LOGIC
With CONSULT
DTC CONFIRMATION PROCEDURE (With CONSULT)
1.
CHECK SELF-DIAG RESULT
1. Turn ignition switch ON.
2. Check for DTC using CONSULT.
Is the DTC detected?
YES (Current DTC)>>Refer to
YES (Past DTC)>>GO TO 2.
NO
>> Inspection End.
2.
ERASE SELF-DIAG RESULT
Erase the DTC using CONSULT.
Can the DTC be erased?
YES
>> Inspection End.
NO
>> Refer to
DTC CONFIRMATION PROCEDURE (Without CONSULT)
1.
CHECK SELF-DIAG RESULT
1. Turn ignition switch ON.
2. Check the air bag warning lamp status. Refer to
SRC-17, "Trouble Diagnosis without CONSULT"
NOTE:
SRS will not enter diagnosis mode if no malfunction is detected in user mode.
Is the DTC detected?
YES
>> Refer to
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009758014
1.
HARNESS CONNECTOR
Visually inspect all applicable harness connectors for the following:
• Visible damage to connector or terminal
• Loose terminal
CONSULT name
DTC
DTC detecting condition
Repair order
CONTROL UNIT
[UNIT FAIL]
B14XX
Air bag diagnosis sensor unit is malfunc-
tioning.
.
AIRBAG DISPOSAL
COMPLETION
SRC-100
< DTC/CIRCUIT DIAGNOSIS >
B14XX AIR BAG DIAGNOSIS SENSOR UNIT
• Poor connection
NOTE:
All harness connectors should be inspected from the air bag diagnosis sensor unit to the end component
(including any in-line connectors).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform one of the following repairs:
• Visible damage: Replace the harness.
• Loose terminal: Secure the terminal.
• Poor connection: Secure the connection.
2.
CONFIRM DTC
1. Reconnect all harness connectors.
2. Turn ignition switch ON.
3. Check for DTC using CONSULT.
Is DTC still current?
YES
>> GO TO 3.
NO
>> Refer to
GI-39, "Intermittent Incident"
.
3.
WIRING HARNESS
Check the wiring harness for visible damage.
NOTE:
The entire wiring harness should be inspected from the air bag diagnosis sensor unit to the end component
(including any in-line connectors).
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace the harness.
4.
CONFIRM DTC
1. Reconnect all harness connectors.
2. Turn ignition switch ON.
3. Check for DTC using CONSULT.
Is DTC still current?
YES
>> GO TO 5.
NO
>> Refer to
GI-39, "Intermittent Incident"
.
5.
AIR BAG DIAGNOSIS SENSOR UNIT
1. Replace the air bag diagnosis sensor unit. Refer to
SR-28, "Removal and Installation"
.
2. Turn ignition switch ON.
3. Check for DTC using CONSULT.
Is DTC still current?
YES
>> GO TO 6.
NO
>> Clear DTC. Inspection End.
6.
RELATED HARNESS
Replace the related harness.
>> END
B00A0 OCS SYSTEM
SRC-101
< DTC/CIRCUIT DIAGNOSIS >
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B00A0 OCS SYSTEM
Description
INFOID:0000000009758015
DTC B00A0 OCCUPANT CLASSIFICATION SYSTEM (OCS)
The OCS control unit is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will mon-
itor the OCS for failures and interruptions in communication between the OCS control unit and the air bag
diagnosis sensor unit.
PART LOCATION
SRC-5, "Component Parts Location"
.
DTC Logic
INFOID:0000000009758016
DTC DETECTION LOGIC
With CONSULT
DTC CONFIRMATION PROCEDURE (With CONSULT)
1.
CHECK SELF-DIAG RESULT
1. Turn ignition switch ON.
2. Check for DTC using CONSULT.
Is the DTC detected?
YES (Current DTC)>>Refer to
SRC-102, "Diagnosis Procedure"
YES (Past DTC)>>GO TO 2.
NO
>> Inspection End.
2.
ERASE SELF-DIAG RESULT
Erase the DTC using CONSULT.
Can the DTC be erased?
YES
>> Inspection End.
NO
>> Refer to
SRC-102, "Diagnosis Procedure"
DTC CONFIRMATION PROCEDURE (Without CONSULT)
1.
CHECK SELF-DIAG RESULT
1. Turn ignition switch ON.
2. Check the air bag warning lamp status. Refer to
SRC-17, "Trouble Diagnosis without CONSULT"
NOTE:
CONSULT name
DTC
DTC detecting condition
Repair order
OCCUPANT DETECTION SENSOR UNIT
[UNIT FAIL]
B00A0
The OCS control unit is malfunction-
ing.
Refer to
OCCUPANT DETECTION SENSOR UNIT
[NO DATA]
OCCUPANT DETECTION SENSOR UNIT
[UNDEFINED]
OCCUPANT DETECTION SENSOR UNIT
[RESET FAIL]
OCCUPANT DETECTION SENSOR
[UNIT FAIL]
The OCS sensor is malfunctioning.
OCCUPANT DETECTION SENSOR
[POWER FAIL]
The OCS sensor circuit is malfunc-
tioning.
OCCUPANT DETECTION SENSOR UNIT
[COMM FAIL]
Communication between the OCS
control unit and the air bag diagnosis
sensor unit is interrupted.
SRC-102
< DTC/CIRCUIT DIAGNOSIS >
B00A0 OCS SYSTEM
SRS will not enter diagnosis mode if no malfunction is detected in user mode.
Is the DTC detected?
YES
>> Refer to
SRC-102, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009758017
1.
HARNESS CONNECTOR
Visually inspect all applicable harness connectors for the following:
• Visible damage to connector or terminal
• Loose terminal
• Poor connection
NOTE:
All harness connectors should be inspected from the air bag diagnosis unit to the end component (including
any in-line connectors).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform one of the following repairs:
• Visible damage: Replace the harness.
• Loose terminal: Secure the terminal.
• Poor connection: Secure the connection.
2.
CONFIRM DTC
1. Reconnect all harness connectors.
2. Turn ignition switch ON.
3. Check for DTC using CONSULT.
Is DTC still current?
YES
>> GO TO 3.
NO
>> Refer to
GI-39, "Intermittent Incident"
.
3.
WIRING HARNESS
Check the wiring harness for visible damage.
NOTE:
The entire wiring harness should be inspected from the air bag diagnosis sensor unit to the end component
(including any in-line connectors).
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace the harness.
4.
CONFIRM DTC
1. Reconnect all harness connectors.
2. Turn ignition switch ON.
3. Check for DTC using CONSULT.
Is DTC still current?
YES
>> GO TO 5.
NO
>> Refer to
GI-39, "Intermittent Incident"
.
5.
REPLACE OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT
1. Replace the occupant classification control unit. Refer to
SR-30, "Removal and Installation"
.
2. Turn ignition switch ON.
3. Check for DTC using CONSULT.
Is DTC still current?
YES
>> GO TO 6.
NO
>> Clear DTC. Inspection End.
6.
AIR BAG DIAGNOSIS SENSOR UNIT
1. Replace the air bag diagnosis sensor unit. Refer to
SR-28, "Removal and Installation"
.
2. Turn ignition switch ON.
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