Diagnostic Instructions

DTC Descriptors

DTC B0022 01: Right Front Seat Belt Pretensioner Deployment Loop Short to Battery

DTC B0022 02: Right Front Seat Belt Pretensioner Deployment Loop Short to Ground

DTC B0022 04: Right Front Seat Belt Pretensioner Deployment Loop Open Circuit

DTC B0022 0D: Right Front Seat Belt Pretensioner Deployment Loop Resistance Above Threshold

DTC B0022 0E: Right Front Seat Belt Pretensioner Deployment Loop Resistance Below Threshold

Diagnostic Fault Information

Circuit	Short to Ground	High Resistance	Open	Short to Voltage	Signal Performance
Seat Belt Pretensioner - RF High Circuit	B0022 02	B0022 0D	B0022 04	B0022 01	B0022 0E
Seat Belt Pretensioner - RF Low Circuit	B0022 02	B0022 0D	B0022 04	B0022 01	B0022 0E

Circuit/System Description

During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the seat belt pretensioner - RF. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage.

A shorting bar used within the seat belt pretensioner - RF connector which will short together both seat belt pretensioner - RF high and low circuits when the connector is disconnected, this will help to prevent unwanted deployment of the inflator module during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0022 01

The seat belt pretensioner - RF high and/or low circuit is short to voltage for 120 milliseconds.

B0022 02

The seat belt pretensioner - RF high and/or low circuit is short to ground for 120 milliseconds.

B0022 04

The seat belt pretensioner - RF high and/or low circuit is open for 120 milliseconds.

B0022 0D

The seat belt pretensioner - RF deployment loop resistance is more than 3.9 ohms for 120 milliseconds.

B0022 0E

The seat belt pretensioner - RF deployment loop resistance is less than 1.1 ohms for 120 milliseconds.

Action Taken When the DTC Sets

Conditions for Clearing the DTC

Diagnostic Aids

If there is more than one DTC set diagnose the open DTC first.

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

SIR Connector End Views

Electrical Information Reference

Special Tools Required

Circuit/System Testing

1. Ignition OFF, disconnect the seat belt retractor pretensioner - RF connector. Then inspect the component and wiring harness sides of the in-line connector for the steering wheel coil module for damage or corrosion. Verify there is no damage or corrosion found.

⇒	If the connector for the seat belt retractor pretensioner - RF is damaged, the seat belt retractor pretensioner - RF must be replaced.

⇒	If the seat belt retractor pretensioner - RF wiring harness side connector is damaged, replace the harness side of the connector.

2. Use the J 38715-30A to connect the J 38715-A to the harness side of the seat belt retractor pretensioner - RF wiring harness connector. Use the PASSENGER INFLATOR connector located on the load tool.
3. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0022 is set current.

⇒	If DTC B0022 is history replace the seat belt retractor pretensioner - RF.

4. With the ignition OFF, disconnect and remove both the J 38715-A and adapter. Then remove the SDM connector and inspect the SDM connector for corrosion or damage. Verify there is no damage or corrosion found.

⇒	If the connector for the SDM is damaged, the SDM must be replaced.

⇒	If the wiring harness side of the SDM connector is damaged, replace the harness side of the connector.

5. Test the high and low circuits between the SDM and seat belt retractor pretensioner - RF for a short to voltage, short to ground, an open, or low resistance. Verify that a short to voltage, short to ground, or open/low resistance does not exist.

⇒	If any of the above conditions are found make the appropriate repair.

6. If circuits test good then replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.