Diagnostic Instructions

DTC Descriptors

DTC B0022 01: RF Pretensioner Deployment Loop Short to Battery

DTC B0022 02: RF Pretensioner Deployment Loop Short to Ground

DTC B0022 04: RF Pretensioner Deployment Loop Open Circuit

DTC B0022 0D: RF Pretensioner Deployment Loop Resistance Above Threshold

DTC B0022 0E: RF Pretensioner Deployment Loop Resistance Below Threshold

Diagnostic Fault Information

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

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. A shorting bar is located in the electrical connector of the seat belt pretensioner. The seat belt pretensioner high control circuit and low control circuit are shorted together by the shorting bar when the electrical connector is disconnected. The shorting bar helps to prevent unwanted deployment of the inflator module during servicing.

The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If the result of any deployment loop circuit test is below specification, DTC B0022 and the appropriate symptom byte sets.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0022 01

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

B0022 02

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

B0022 04

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

B0022 0D

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

B0022 0E

The RF seat belt pretensioner 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 DTC B00122 0E is setting, be certain that all circuit shorting bars are isolated after connecting circuit components. There are shorting bars in most circuit connectors, including the SDM and inline harness connectors. DTC B0022 0E will set if the shorting bars are engaged when the ignition is ON.

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

Each inflatable restraint module requires a specific adapter to connect the load tool to the SIR system.

Circuit/System Testing

Important: Refer to SIR Service Precautions.

When removing the connectors, inspect for terminal damage or corrosion. Inspect the connector body for damage to the locators that disengage the shorting bars when connected. Damage or corrosion to the following components requires repair or replacement of the affected component/connector:

•	Inflatable restraint seat belt pretensioner

•	SDM module

•	Front end sensor wiring harness connector

•	SDM wiring harness connector

Important: The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. Correct connection isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.

1. Verify that the inflatable restraint RF seat belt pretensioner connector and CPA are engaged.

⇒	If the above condition is not found, make the appropriate repair.

2. Ignition OFF, disconnect the harness connector at the RF seat belt pretensioner.
3. With the appropriate load tool adapter, connect J 38715-A or SA9409Z-A in place of the RF seat belt pretensioner.
4. Ignition ON, with a scan tool, verify that DTC B0022 is set as current.

⇒	If the DTC is not set or is set as history, cycle the ignition OFF, disconnect the load tool and adapter, reconnect the harness connector at the RF seat belt pretensioner, and cycle the ignition ON. If the DTC resets after reconnecting the pretensioner, replace the RF seat belt pretensioner.

5. Ignition OFF, disconnect the load tool and the adapter.
6. Disconnect the harness connector at the SDM.
7. Ignition ON, test for less than 1.0 volt between the appropriate control circuit listed below and ground:

•	SDM circuit terminal 52

•	SDM circuit terminal 53

⇒	If greater than the specified range, test the control circuit for a short to voltage.

8. Ignition OFF, test for infinite resistance between the appropriate control circuit listed below and ground:

•	SDM circuit terminal 52

•	SDM circuit terminal 53

⇒	If less than the specified value, test the control circuit for a short to ground.

9. Test for less than 1 ohm between the appropriate control circuit terminal 5 listed below:

•	Pretensioner circuit terminal 1 and SDM terminal 53

•	Pretensioner circuit terminal 2 and SDM terminal 52

⇒	If greater than the specified range, test the control circuit for an open/high resistance.

10. If all circuits test normal, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.