9000 - 9999: 9390

9390-CENTER SEAT BELT RETRACTOR TENSIONER CIRCUIT OPEN





For a complete wiring diagram Consult Diagrams/Electrical.

Theory of Operation

When powered, the Occupant Restraint Controller (ORC) sends a test current to the Center Seat Belt Tensioner squibs to verify the integrity of the squib and wiring. These circuits are maintained in a "floating" configuration at the module (connected to neither power nor ground) as protection against inadvertent deployment. Use of the 8443 Load Tool in the tests below substitutes a suspect squib with a known good component. The use of the ORC adapter tool provide a test point as well as a method for opening the shorting bar connections within the harness connector.

- When Monitored:
The ORC sends out a 40mA diagnostic current on each squib voltage supply circuit at power up and every 500ms thereafter while the ignition is in on. The module then monitors the data return wire to determine the state of the circuit.

- Set Condition:
The Occupant Restraint Controller (ORC) monitors the resistance of the Center Seat Belt Tensioner circuits. The ORC will set this DTC if an open or high resistance is detected on the Center Seat Belt Tensioner circuits.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. .

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.
With the scan tool, read ORC DTC.
SELECT ACTIVE or STORED DTC:

ACTIVE DTC

- Go To2

STORED DTC

- Perform *RESTRAINTS SYSTEM INTERMITTENT TEST. .

2. CHECK FOR OPEN CENTER SEAT BELT RETRACTOR TENSIONER




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

Disconnect the Center Seat Belt Tensioner connector.

NOTE: Check connectors - Clean and repair as necessary.

Connect the 8443 Load Tool and the 8443-8 Jumper to the Center Seat Belt Retractor Tensioner connector.

WARNING: To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.

With the scan tool, read the active ORC DTCs.
Does the scan tool display: 9390-CENTER SEAT BELT RETRACTOR TENSIONER CIRCUIT OPEN?

Yes

- Go To 3

No

- Replace the Center Seat Belt Retractor Tensioner.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.

3. CHECK CENTER SEAT BELT RETRACTOR TENSIONER LINE 1 CIRCUIT FOR AN OPEN




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

Disconnect the 8443 Load Tool and the 8443-8 Jumper from the Center Seat Belt Retractor Tensioner connector.
Disconnect the ORC connectors.

NOTE: Check connectors - Clean and repair as necessary.

Connect the Load Tool ORC 8443-28 Adaptor to the ORC connector.
Measure the resistance of the Center Seat Belt Tensioner Line 1 circuit between the Center Seat Belt Retractor Tensioner connector cavity 1 and the ORC 8443-28 Adaptor cavity C1B-45.
Is the resistance below 1.0 ohm?

Yes

- Go To 4

No

- Repair the Center Seat Belt Tensioner Line 1 circuit for an open.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.

4. CHECK CENTER SEAT BELT TENSIONER LINE 2 CIRCUIT FOR AN OPEN




Measure the resistance of the Center Seat Belt Retractor Tensioner Line 2 circuit between the Center Seat Belt Retractor Tensioner connector cavity 2 and the ORC 8443-28 Adaptor cavity C1B-46.
Is the resistance below 1.0 ohm?

Yes

WARNING: If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment and serious or fatal injury.

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

- Replace the ORC.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.

No

- Repair the Center Seat Belt Retractor Tensioner Line 2 circuit for an open.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.