B1C38 Jeep OBD Code Diagnostic Procedure

B1C38 Jeep OBD Code

1st ROW DRIVER RETRACTOR PRETENSIONER CIRCUIT LOW

For a complete wiring diagram Refer to Section 8W.

  • When Monitored:

With the ignition on, the Occupant Restraint Controller (ORC) monitors the resistance of the Driver Seat Belt Retractor Tensioner circuits.

 

  • Set Condition:The ORC has detected low resistance on the Driver Seat Belt Retractor Tensioner circuits.

 

Possible Causes
(R55) DRIVER SEAT BELT RETRACTOR TENSIONER LINE 1 CIRCUIT OR (R53) DRIVER SEAT BELT RETRACTOR TENSIONER LINE 2 CIRCUIT SHORTED TO GROUND
DRIVER SEAT BELT RETRACTOR TENSIONER
OCCUPANT RESTRAINT CONTROLLER (ORC)

Diagnostic Test

1. DETERMINE ACTIVE OR STORED DTC

NOTE:
Ensure the battery is fully charged.

NOTE:
The scan tool, SRS Airbag Load Tool MRL 8443, and DVOM are required to perform the following test.

Select Active or Stored DTC.

Is the DTC active or stored?

ORC – ACTIVE DTC

  • Go To 2

ORC – STORED DTC

  • Go To 5


2. CHECK FOR SHORTED DRIVER 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 Driver Seat Belt Retractor Tensioner connector.

NOTE:
Check connectors – Clean and repair as necessary.

Connect the 8443 Load Tool and appropriate Jumper to the Driver 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 DTC.

Does the scan tool display: B1C38-1st ROW DRIVER RETRACTOR PRETENSIONER CIRCUIT LOW?

Yes

  • Go To 3

No

  • Replace the Driver Seat Belt Retractor Tensioner in accordance with the Service Information.

 

  • Perform *ORC VERIFICATION TEST – VER 1

 


3. CHECK (R55) DRIVER SEAT BELT RETRACTOR TENSIONER LINE 1 CIRCUIT AND (R53) DRIVER SEAT BELT RETRACTOR TENSIONER LINE 2 CIRCUIT FOR A SHORT TO GROUND

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 Jumper from the Driver Seat Belt Retractor Tensioner connector.

Disconnect the ORC connectors.

NOTE:
Check connectors – Clean and repair as necessary.

  • Connect the Load Tool ORC 8443-32-L Adaptor to the ORC C2 connector.
  • Measure the resistance of the (R55) Driver Seat Belt Retractor Tensioner Line 1 circuit between ground and the Driver Seat Belt Retractor Tensioner connector.
  • Measure the resistance of the (R53) Driver Seat Belt Retractor Tensioner Line 1 circuit between ground and the Driver Seat Belt Retractor Tensioner connector.

Is the resistance below 10K ohms on either circuit?

Yes

  • Repair the Driver Seat Belt Retractor Tensioner circuits for a short to ground.

 

  • Perform *ORC VERIFICATION TEST – VER 1

 

No

  • Go To 4


4. REPLACE THE ORC

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.

Repair

  • Replace the ORC in accordance with the Service Information.

 

  • Perform *ORC VERIFICATION TEST – VER 1

 

5. STORED ORC DTC

With the scan tool, record and erase all DTC from all Airbag System Modules.

If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.

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

  • Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
  • Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
  • The following additional checks may assist you in identifying a possible intermittent problem.
  • Reconnect any disconnected components and harness connector.

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

  • With the scan tool monitor active codes as you work through the following steps.
  • Wiggle the wiring harness and connectors of the related airbag circuit or component.
  • If codes are related to the Driver Airbag circuits, rotate the steering wheel from stop to stop.
  • If only stored codes return continue the test until the problem area has been isolated.
  • In the previous steps you have attempted to recreate the conditions responsible for setting active DTC in question.

Are any ACTIVE DTC 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 vehicle to customer.
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