For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides and overview of each diagnostic category.

### DTC Descriptors

DTC B0015 01: Driver Pretensioner Deployment Loop Stage 2 Short to Battery
DTC B0015 02: Driver Pretensioner Deployment Loop Short to Ground
DTC B0015 04: Driver Pretensioner Deployment Loop Open Circuit
DTC B0015 0D: Driver Pretensioner Deployment Loop Resistance Above Threshold
DTC B0015 0E: Driver Pretensioner Deployment Loop Resistance Below Threshold
DTC B0019 01: Passenger Frontal Deployment Loop Stage 1 Short to Battery
DTC B0019 02: Passenger Frontal Deployment Loop Stage 1 Short to Ground
DTC B0019 04: Passenger Frontal Deployment Loop Stage 1 Open Circuit
DTC B0019 0D: Passenger Frontal Deployment Loop Stage 1 Resistance Above Threshold
DTC B0019 0E: Passenger Frontal Deployment Loop Stage 1 Resistance Below Threshold
DTC B0020 01: Passenger Frontal Deployment Loop Stage 2 Short to Battery
DTC B0020 02: Passenger Frontal Deployment Loop Stage 2 Short to Ground
DTC B0020 04: Passenger Frontal Deployment Loop Stage 2 Open Circuit
DTC B0020 0D: Passenger Frontal Deployment Loop Stage 2 Resistance Above Threshold
DTC B0020 0E: Passenger Frontal Deployment Loop Stage 2 Resistance Below Threshold
DTC B0022 01: Passenger Pretensioner Deployment Loop Short to Battery
DTC B0022 02: Passenger Pretensioner Deployment Loop Short to Ground
DTC B0022 04: Passenger Pretensioner Deployment Loop Open Circuit
DTC B0022 0D: Passenger Pretensioner Deployment Loop Resistance Above Threshold
DTC B0022 0E: Passenger Pretensioner Deployment Loop Resistance Below Threshold

### Diagnostic Fault Information

Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance
--- | --- | --- | --- | --- | ---
Seat Belt Pretensioner - Driver - High Control | B0015 02 | B0015 04 | B0015 0D | B0015 01 | B0015 0E
Seat Belt Pretensioner - Driver Low Control | B0015 02 | B0015 04 | B0015 0D | B0015 01 | B0015 0E
IP Module - Stage 1 - High Control | B0019 02 | B0019 04 | B0019 0D | B0019 01 | B0019 0E
IP Module - Stage 1 - Low Control | B0019 02 | B0019 04 | B0019 0D | B0019 01 | B0019 0E
IP Module - Stage 2 - High Control | B0020 02 | B0020 04 | B0020 0D | B0020 01 | B0020 0E
IP Module - Stage 2 - Low Control | B0020 02 | B0020 04 | B0020 0D | B0020 01 | B0020 0E
Seat Belt Pretensioner - Passenger - High Control | B0022 02 | B0022 04 | B0022 0D | B0022 01 | B0022 0E
Seat Belt Pretensioner - Passenger - Low Control | B0022 02 | B0022 04 | B0022 0D | B0022 01 | B0022 0E

### Circuit/System Description

If a malfunction is detected, a DTC will be stored in non-volatile memory. 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 air bag module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, shorts to ground, and shorts voltage. There are 2 shorting bars used within the module connector which will short together both 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

#### B0015 01, B0019 01 Stage 1, B0020 01 Stage 2, B0022 01

The air bag module high and/or low circuit is short to voltage for 120 milliseconds.

#### B0015 02, B0019 02 Stage 1, B0020 02 Stage 2, B0022 02

The air bag module high and/or low circuit is short to ground for 120 milliseconds.

#### B0015 04, B0019 04 Stage 1, B0020 04 Stage 2, B0022 04

The air bag module high and/or low circuit is open for 120 milliseconds.

#### B0015 0D, B0019 0D Stage 1, B0020 0D Stage 2, B0022 0D

The air bag module deployment loop resistance is greater than 3.9 ohms for 120 milliseconds.

#### B0015 0E, B0019 0E Stage 1, B0020 0E Stage 2, B0022 0E

The air bag module deployment loop resistance is less than 1.1 ohms for 120 milliseconds.

### Action Taken When the DTC Sets

• | The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

• | The SDM will store a DTC, however if an event occurs the system will still attempt deployments.

### Conditions for Clearing the DTC

• | The condition for setting the DTC no longer exists.

• | A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

### Diagnostic Aids

When a harness connector is disconnected, the high control and low control circuits are shorted together by the integral shorting bar. This should be taken into account when testing for faults on these circuits.

### 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

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

#### Special Tools

J 38715-A Driver and Passenger SIR Load Tool

### Circuit/System Testing

Important: When removing the connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:

• | Pretensioner

• | Air bag module

• | SDM module

• | Air bag 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. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.

1. Verify that the appropriate inflator restraint module 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 appropriate inflatable restraint module.
3. With the appropriate load tool adaptor, connect J 38715-A in place of the inflatable restraint module.
4. Ignition ON, with a scan tool, verify the appropriate DTC is set as current.

⇒ | If the DTC is not set or is set as history, cycle ignition OFF, disconnect the load tool and adapter, reconnect the harness connector at the inflator restraint module, and cycle the ignition ON. If the DTC resets after reconnecting the module, replace the inflator restraint module.

5. Ignition OFF, disconnect the load tool and adaptor.
6. Disconnect the harness connector at the SDM.
7. Ignition ON, test for less than 1 volt between the appropriate high control circuit terminal listed below and ground:

• | I/P Module - Stage 1 terminal 18

• | I/P Module - Stage 2 terminal 13

• | Pretensioner - Driver Seat terminal 56

• | Pretensioner - Passenger Seat terminal 52

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

8. Ignition ON, test for less than 1 volt between the appropriate low control circuit terminal listed below and ground:

• | I/P Module - Stage 1 terminal 19

• | I/P Module - Stage 2 terminal 12

• | Pretensioner - Driver Seat terminal 57

• | Pretensioner - Passenger Seat terminal 53

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

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

• | I/P Module - Stage 1 terminal 18

• | I/P Module - Stage 2 terminal 13

• | Pretensioner - Driver Seat terminal 56

• | Pretensioner - Passenger Seat terminal 52

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

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

• | I/P Module - Stage 1 terminal 19

• | I/P Module - Stage 2 terminal 12

• | Pretensioner - Driver Seat terminal 57

• | Pretensioner - Passenger Seat terminal 53

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

11. Test for less then 5 ohms between the appropriate high control circuit terminals listed below:

• | I/P Module - Stage 1 terminal A2 X1 and SDM terminal 18

• | I/P Module - Stage 2 terminal B2 X2 and SDM terminal 13

• | Driver pretensioner terminal Z and SDM terminal 56

• | Passenger pretensioner terminal Z and SDM terminal 52

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

12. Test for less then 5 ohms between the appropriate low control circuit terminals listed below:

• | I/P Module - Stage 1 terminal A1 X1 and SDM terminal 19

• | I/P Module - Stage 2 terminal B1 X2 and SDM terminal 12

• | Driver pretensioner terminal 1 and SDM terminal 57

• | Passenger pretensioner terminal 1 and SDM terminal 53

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

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

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Inflatable Restraint Instrument Panel Module Replacement

• | Seat Belt Retractor Pretensioner Replacement - Front

• | SIR/SRS Wiring Repairs

• | Control Module References for SDM replacement, setup, and programming