*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

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

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

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 information. 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

2.CHECK FOR ACTIVE OCM DTCs

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

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.

3.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 minutes before proceeding.

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

Is the voltage correct on all three circuits?

Yes

Go To 4

Go To 13

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

Is the voltage correct?

Yes

Go To 5

Go To 24

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

Is the voltage correct on all three circuits?

Yes

Go To 6

Go To 13

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

Is the voltage correct?

Yes

Go To 7

Go To 25

7.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 minutes before proceeding.

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

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 minutes before proceeding.
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.

8.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 minutes before proceeding.

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

Is the voltage correct on all three circuits?

Yes

Go To 9

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

9.CHECK FOR AN OPEN PASSENGER SEAT WEIGHT SENSOR

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

NOTE: Verify that the DVOM is connected with the positive lead to the Power circuit and the negative lead to the Ground circuit.

Is the resistance approximately 3.25k ohms?

Yes

Go To 10

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.

10.CHECK FOR AN OPEN PASSENGER SEAT WEIGHT SENSOR

NOTE: Verify that the DVOM is connected with the positive lead to the Signal circuit and the negative lead to the Ground circuit.

Is the resistance approximately 106k ohms?

Yes

Go To 11

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.

11.CHECK FOR AN OPEN SEAT BELT TENSION SENSOR

NOTE: Verify that the DVOM is connected with the positive lead to the Power circuit and the negative lead to the Ground circuit.

Is the resistance approximately 7.5k ohms?

Yes

Go To 12

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.

12.CHECK FOR AN OPEN SEAT BELT TENSION SENSOR

NOTE: Verify that the DVOM is connected with the positive lead to the Signal circuit and the negative lead to the Ground circuit.

Is the resistance approximately 19.5m ohms?

Yes

Go To 26

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.

13.CHECK THE PASSENGER BLADDER PRESSURE SENSOR AND THE SEAT BELT TENSION SENSOR POWER, SIGNAL, AND GROUND CIRCUIT FOR A SHORT TO VOLTAGE

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

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

Is there any voltage present on any of the circuits?

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

Go To 14

14.CHECK THE PASSENGER BLADDER PRESSURE SENSOR POWER CIRCUIT FOR AN OPEN

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

Is the resistance below 5.0 ohms?

Yes

Go To 15

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.

15.CHECK THE PASSENGER BLADDER PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 16

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

16.CHECK THE SEAT BELT TENSION SENSOR POWER CIRCUIT FOR AN OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 17

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

17.CHECK THE SEAT BELT TENSION SENSOR SIGNAL CIRCUIT FOR AN OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 18

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

18.CHECK THE PASSENGER BLADDER PRESSURE SENSOR AND THE SEAT BELT TENSION SENSOR POWER, SIGNAL, AND GROUND CIRCUIT FOR A SHORT TO GROUND

Is the resistance below 10k ohms on any of the circuits?

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

Go To 19

19.CHECK THE PASSENGER BLADDER PRESSURE SENSOR POWER CIRCUIT FOR A SHORT TO THE OTHER SENSOR CIRCUITS

Is the resistance below 10k ohms on any of the circuits?

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

Go To 20

20.CHECK THE PASSENGER BLADDER PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO THE OTHER SENSOR CIRCUITS

Is the resistance below 10k ohms on any of the circuits?

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

Go To 21

21.CHECK THE PASSENGER BLADDER PRESSURE SENSOR GROUND CIRCUIT FOR A SHORT TO THE OTHER SENSOR CIRCUITS

Is the resistance below 10k ohms on any of the circuits?

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

Go To 22

22.CHECK THE SEAT BELT TENSION SENSOR POWER CIRCUIT FOR A SHORT TO THE OTHER SENSOR CIRCUITS

Is the resistance below 10k ohms on any of the circuits?

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

Go To 23

23.CHECK THE SEAT BELT TENSION SENSOR SIGNAL CIRCUIT FOR A SHORT TO THE SEAT BELT TENSION SENSOR GROUND CIRCUIT

Is the resistance below 10k ohms?

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

Go To 26

24.CHECK FOR AN OPEN PASSENGER BLADDER PRESSURE SENSOR GROUND CIRCUIT

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

Is the resistance below 5.0 ohms?

Yes

Go To 26

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

25.CHECK FOR AN OPEN SEAT BELT TENSION SENSOR GROUND CIRCUIT

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

Is the resistance below 5.0 ohms?

Yes

Go To 26

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.

26.DETERMINE THE CORRECT REPAIR

NOTE: The Occupant Classification Module (OCM) and the Passenger Seat Bladder and Cushion Kit are the only serviceable OCS components.

If possible, check the vehicle's repair history.
The Service Kit wiring harness uses tamper resistant material on the harness connector. Inspect for the tamper resistant material on the harness connector.

Does the seat have a Bladder and Cushion Service Kit?

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.
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
NOTE: The Bladder and Cushion Kit are calibrated as an assembly. Do not disconnect the Bladder from the Cushion Kit. Service only as an assembly.
Replace OCS Bladder and Cushion Kit in accordance with the Service information.
Perform SYSTEM VERIFICATION REQUIRED test.
Perform AIRBAG SYSTEM VERIFICATION TEST - VER 1.

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.
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
NOTE: The Bladder and Cushion Kit are calibrated as an assembly. Do not disconnect the Bladder from the Cushion Kit. Service only as an assembly.
Replace the OCM in accordance with the Service Information.
Perform SYSTEM VERIFICATION REQUIRED test.
Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.