PCI BUS SHORT TO BATTERY

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the ignition.
Set Condition:
If the Occupant Classification Module (OCM) detects a short to voltage on the PCI Bus circuit.

Possible Causes

PCI BUS CIRCUIT SHORTED TO VOLTAGE

OCM

Diagnostic Test

1. DETERMINE ACTIVE OR STORED DTC

Turn the ignition on.

NOTE: Ensure the battery is fully charged.

Select ACTIVE or STORED DTC:

ACTIVE DTC

Go To 2

STORED DTC

Go To 3

2. DETERMINE THE CORRECT REPAIR

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

Determine the correct repair by verifying if the front passenger seat has a Bladder and Cushion Service Kit as follows:

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.

3. INSPECT THE OCCUPANT CLASSIFICATION SYSTEM (OCS) WIRING AND CONNECTORS FOR CONDITIONS THAT CAUSED THE DTC 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 minutes 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.
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 4

4. INSPECT THE RELATED BODY WIRING AND CONNECTORS FOR CONDITIONS THAT CAUSED THE DTC TO SET

Using the wiring diagram/schematic as a guide, inspect the related body wiring and connectors for chafed, pierced, pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and contaminated terminals. Repair as necessary.

Are any of these conditions present?

Yes

Repair as necessary in accordance with the Service Information.

Go To 5

5. 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.
If codes are related to the Driver Airbag circuits, rotate the steering wheel from stop to stop.
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 problem found at this time. Erase all codes before returning the vehicle to the customer.