Jeep Liberty KJ. Manual - part 229

*AIRBAG SYSTEM VERIFICATION TEST - VER 1

For a complete wiring diagram Refer to Section 8W.

*AIRBAG SYSTEM VERIFICATION TEST - VER 1

1. Remove all special tools and jumper wires and reconnect all previously disconnected components - except the
Battery.

WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.

1. If repairs were made to the Occupant Classification System (OCS), perform the Belt Tension Sensor Verifica-
tion Test in this Section before proceeding.

2. Connect the scan tool to the Data Link Connector - use the most current software available.

3. With the scan tool, erase stored DTCs in all Airbag System Modules.

4. Turn the ignition off, and wait 15 seconds, then turn the ignition on.

5. Wait one minute, and read active DTCs in all Airbag System Modules.

6. Read the stored DTCs in all Airbag System Modules.

Are any DTCs present or if the original condition still present?

Yes

>> Repair is not complete. Select the appropriate diagnostic procedure from the Table of Contents in this

section.

>> Repair is complete.

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RESTRAINTS - ELECTRICAL DIAGNOSTICS

*BELT TENSION SENSOR / PRESSURE SENSOR FAULTS

For a complete wiring diagram Refer to Section 8W.

Possible Causes

OCS WIRING CHAFED, PIERCED, PINCHED, OR BROKEN

OCS WIRING CONNECTOR TERMINAL(S) BROKEN, BENT, PUSHED OUT, CORRODED, OR CONTAMINATED

PASSENGER BLADDER PRESSURE SENSOR POWER, SIGNAL, OR GROUND CIRCUIT OPEN

PASSENGER BLADDER PRESSURE SENSOR POWER, SIGNAL, OR GROUND CIRCUIT SHORTED TO
VOLTAGE

PASSENGER BLADDER PRESSURE SENSOR POWER, SIGNAL, OR GROUND CIRCUIT SHORTED TO
GROUND

SEAT BELT TENSION SENSOR POWER, SIGNAL, OR GROUND CIRCUIT OPEN

SEAT BELT TENSION SENSOR POWER, SIGNAL, OR GROUND CIRCUIT SHORTED TO VOLTAGE

SEAT BELT TENSION SENSOR POWER, SIGNAL, OR GROUND CIRCUIT SHORTED TO GROUND

BELT TENSION SENSOR

PASSENGER SEAT WEIGHT SENSOR

OCM

Diagnostic Test

INSPECT THE OCCUPANT CLASSIFICATION SYSTEM (OCS) WIRING AND CONNECTORS FOR
CONDITIONS THAT CAUSED THE DTC(s) TO SET

Turn the ignition on.

With the scan tool, record and erase Occupant Classification Module (OCM) 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 Occupant Classification System (OCS) wiring and connec-
tors for chafed, pierced, pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and con-
taminated 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.

If the condition is present in the OCM / OCM connector terminals / OCM wiring harness / Passenger
Seat Weight Sensor, replace the OCS Bladder and Cushion Kit in accordance with the Service infor-
mation. If the condition is present in the Passenger Belt Tension Sensor / sensor wiring, replace the
Front Passenger Seat Belt and Retractor Assembly and the Belt Tension Sensor in accordance with the
Service Information.

Perform SYSTEM VERIFICATION REQUIRED test.

Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

>> Go To 2

RESTRAINTS - ELECTRICAL DIAGNOSTICS

8O - 223

CHECK FOR ACTIVE OCM DTCs

Reconnect all disconnected OCS harness connectors.

WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
With the scan tool, select OCM. Wait two minutes before proceeding.

With the scan tool, read active OCM DTCs.

Does the scan tool display any active Belt Tension Sensor or Pressure Sensor Related DTCs?

Yes

>> Record the DTCs displayed by the scan tool for reference in a later step. Then, Go To 3.

No, But Other DTCs Active

Select the appropriate diagnostic procedure from the Table of Contents in this section.

No DTCs Active

Perform SYSTEM VERIFICATION REQUIRED test.

Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

CHECK THE VOLTAGE OF THE PASSENGER BLADDER PRESSURE SENSOR POWER, SIGNAL, AND
GROUND CIRCUIT

WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two min-
utes before proceeding.
Disconnect the Passenger Seat Weight Sensor.

Disconnect the Belt Tension Sensor.

WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
Measure the voltage of the Passenger Bladder Pressure Sensor Power circuit. The voltage should be approximately
4.9 volts.

Measure the voltage of the Passenger Bladder Pressure Sensor Signal circuit. The voltage should be approximately
2.5 volts.

Measure the voltage of the Passenger Bladder Pressure Sensor Ground circuit. The voltage should be 0.0 volts.

Is the voltage correct on all three circuits?

Yes

>> Go To 4

>> Go To 13

CHECK THE VOLTAGE BETWEEN THE PASSENGER BLADDER PRESSURE SENSOR POWER AND
GROUND CIRCUIT

Measure the voltage between the Passenger Bladder Pressure Sensor Power circuit and the Passenger Bladder
Pressure Sensor Ground circuit. The voltage should be approximately 4.9 volts.

Is the voltage correct?

Yes

>> Go To 5

>> Go To 24

CHECK THE VOLTAGE OF THE SEAT BELT TENSION SENSOR POWER, SIGNAL, AND GROUND
CIRCUIT

Measure the voltage of the Seat Belt Tension Sensor Power circuit. The voltage should be approximately 4.9 volts.

Measure the voltage of the Seat Belt Tension Sensor Signal circuit. The voltage should be approximately 2.5 volts.

Measure the voltage of the Seat Belt Tension Sensor Ground circuit. The voltage should be 0.0 volts.

Is the voltage correct on all three circuits?

Yes

>> Go To 6

>> Go To 13

8O - 224

RESTRAINTS - ELECTRICAL DIAGNOSTICS

CHECK THE VOLTAGE BETWEEN THE SEAT BELT TENSION SENSOR POWER AND GROUND CIRCUIT

Measure the voltage between the Seat Belt Tension Sensor Power circuit and the Seat Belt Tension Sensor Ground
circuit. The voltage should be approximately 4.9 volts.

Is the voltage correct?

Yes

>> Go To 7

>> Go To 25

CHECK THE VOLTAGE OF THE PASSENGER BLADDER PRESSURE SENSOR POWER, SIGNAL, AND
GROUND CIRCUIT WITH THE BELT TENSION SENSOR CONNECTED

WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two min-
utes before proceeding.
Connect the Belt Tension Sensor.

Measure the voltage of the Passenger Bladder Pressure Sensor Signal circuit. The voltage should be approximately
2.5 volts.

Measure the voltage of the Passenger Bladder Pressure Sensor Ground circuit. The voltage should be 0.0 volts.

Is the voltage correct on all three circuits?

Yes

>> Go To 8

WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two min-
utes before proceeding.

Replace the Front Passenger Seat Belt and Retractor Assembly and the Belt Tension Sensor in accor-
dance with the Service Information.

Perform SYSTEM VERIFICATION REQUIRED test.

Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

CHECK THE VOLTAGE OF THE SEAT BELT TENSION SENSOR POWER, SIGNAL, AND GROUND
CIRCUIT WITH THE PASSENGER SEAT WEIGHT SENSOR CONNECTED

WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two min-
utes before proceeding.
Disconnect the Belt Tension Sensor.

Connect the Passenger Seat Weight Sensor.

WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
Measure the voltage of the Seat Belt Tension Sensor Power circuit. The voltage should be approximately 4.9 volts.

Measure the voltage of the Seat Belt Tension Sensor Signal circuit. The voltage should be approximately 2.5 volts.

Measure the voltage of the Seat Belt Tension Sensor Ground circuit. The voltage should be 0.0 volts.

Is the voltage correct on all three circuits?

Yes

>> Go To 9

WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two min-
utes before proceeding.

RESTRAINTS - ELECTRICAL DIAGNOSTICS

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