Jeep Liberty KJ. Manual — part 209
PASSENGER PRESSURE SENSOR SHORT TO GROUND
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
If the Occupant Classification Module (OCM) detects Passenger Seat Weight Sensor A/D counts are less than
13.
Diagnostic Test
1.
DETERMINE ACTIVE OR STORED DTC
NOTE: Ensure that the battery is fully charged.
Turn the ignition on.
SELECT ACTIVE or STORED DTC:
ACTIVE DTC
Refer to *Belt Tension Sensor / Pressure Sensor Faults for the diagnostic procedure.
STORED DTC
Go To 2
2.
INSPECT THE OCCUPANT CLASSIFICATION SYSTEM (OCS) WIRING AND CONNECTORS FOR
CONDITIONS THAT CAUSED THE DTC(s) TO SET
NOTE: Diagnose and repair all active codes before diagnosing stored codes. Refer to the Table of Contents
in this Section for a complete list of airbag system diagnostic procedures.
With the scan tool, record and erase all Airbag System Module DTCs.
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two min-
utes before proceeding.
Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors for chafed, pierced,
pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and contaminated terminals.
Are any of these conditions present?
Yes
>>
WARNING: If the Occupant Classification Module (OCM) is dropped at any time, it must be replaced. Failure
to take the proper precautions could result in accidental airbag deployment and personal injury or death.
Replace the OCS Bladder and Cushion Kit in accordance with the Service information.
Perform SYSTEM VERIFICATION REQUIRED test.
Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
No
>> Go To 3
3.
TEST FOR AN INTERMITTENT CONDITION
Reconnect all disconnected components and harness connectors.
WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
With the scan tool, monitor for active codes while performing the following:
•
Wiggle the wiring harness and connectors of the related circuit.
•
Continue the test until either a code becomes active or the problem area is isolated.
In the previous steps you have attempted to recreate the conditions responsible for setting the DTC in question /
causing the intermittent condition.
Are any ACTIVE DTCs present?
Yes
>> Select the appropriate diagnostic procedure from the Table of Contents in this section.
No
>> No problem found at this time. Erase all codes before returning the vehicle to the customer.
8O - 142
RESTRAINTS - ELECTRICAL DIAGNOSTICS
KJ
PASSENGER PRESSURE SENSOR SHORT TOGETHER
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
If the Occupant Classification Module (OCM) detects the same value on two Passenger Bladder Pressure Sen-
sor circuits.
Diagnostic Test
1.
DETERMINE ACTIVE OR STORED DTC
NOTE: Ensure that the battery is fully charged.
Turn the ignition on.
SELECT ACTIVE or STORED DTC:
ACTIVE DTC
Refer to *Belt Tension Sensor / Pressure Sensor Faults for the diagnostic procedure.
STORED DTC
Go To 2
2.
INSPECT THE OCCUPANT CLASSIFICATION SYSTEM (OCS) WIRING AND CONNECTORS FOR
CONDITIONS THAT CAUSED THE DTC(s) TO SET
NOTE: Diagnose and repair all active codes before diagnosing stored codes. Refer to the Table of Contents
in this Section for a complete list of airbag system diagnostic procedures.
With the scan tool, record and erase all Airbag System Module DTCs.
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two min-
utes before proceeding.
Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors for chafed, pierced,
pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and contaminated terminals.
Are any of these conditions present?
Yes
>>
WARNING: If the Occupant Classification Module (OCM) is dropped at any time, it must be replaced. Failure
to take the proper precautions could result in accidental airbag deployment and personal injury or death.
NOTE: The Occupant Classification Module (OCM) and the Passenger Seat Bladder and Cushion Kit are the
only serviceable OCS components.
Replace the OCS Bladder and Cushion Kit in accordance with the Service information.
Perform SYSTEM VERIFICATION REQUIRED test.
Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
No
>> Go To 3
3.
TEST FOR AN INTERMITTENT CONDITION
Reconnect all disconnected components and harness connectors.
WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
With the scan tool, monitor for active codes while performing the following:
•
Wiggle the wiring harness and connectors of the related circuit.
•
Continue the test until either a code becomes active or the problem area is isolated.
In the previous steps you have attempted to recreate the conditions responsible for setting the DTC in question /
causing the intermittent condition.
Are any ACTIVE DTCs present?
Yes
>> Select the appropriate diagnostic procedure from the Table of Contents in this section.
No
>> No problem found at this time. Erase all codes before returning the vehicle to the customer.
KJ
RESTRAINTS - ELECTRICAL DIAGNOSTICS
8O - 143
PASSENGER SEAT BELT TENSIONER CIRCUIT OPEN
For a complete wiring diagram Refer to Section 8W.
8O - 144
RESTRAINTS - ELECTRICAL DIAGNOSTICS
KJ
•
When Monitored:
With the ignition on.
•
Set Condition:
The Occupant Restraint Controller (ORC) monitors the resistance of the Passenger Seat Belt Tensioner cir-
cuits. The ORC will set this DTC if it detects an open or high resistance on the Passenger Seat Belt Tensioner
circuits.
Possible Causes
(R56) PASSENGER SEAT BELT TENSIONER LINE 1 CIRCUIT OR (R54) PASSENGER SEAT BELT TENSIONER
LINE 2 CIRCUIT OPEN
PASSENGER SEAT BELT PRETENSIONER
ORC
Diagnostic Test
1.
DETERMINE ACTIVE OR STORED DTC
NOTE: Ensure that the battery is fully charged.
NOTE: The scan tool, SRS Airbag Load Tool MRL 8443, and DVOM are required to perform the following
test.
Turn the ignition on.
SELECT ACTIVE or STORED DTC:
ACTIVE DTC
Go To 2
STORED DTC
Go To 5
2.
CHECK FOR OPEN PASSENGER SEAT BELT PRETENSIONER
WARNING: To avoid personal injury or death, turn the ignition off,
disconnect the battery and wait two minutes before proceeding.
Disconnect the Passenger Seat Belt Pretensioner connector.
NOTE: Check connectors - Clean and repair as necessary.
Connect the 8443 Load Tool and appropriate Jumper to the Passenger
Seat Belt Pretensioner connector.
WARNING: To avoid personal injury or death, turn the ignition on,
then reconnect the battery.
With the scan tool, read the active ORC DTCs.
Does the scan tool display: PASSENGER SEAT BELT TEN-
SIONER CIRCUIT OPEN?
Yes
>> Go To 3
No
>> Replace the Passenger Seat Belt Pretensioner in accor-
dance with the Service Information.
Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
KJ
RESTRAINTS - ELECTRICAL DIAGNOSTICS
8O - 145
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