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

B0015 01: Driver Pretensioner Deployment Loop Stage 2 Short to Battery
B0015 02: Driver Pretensioner Deployment Loop Short to Ground
B0015 04: Driver Pretensioner Deployment Loop Open Circuit
B0015 0D: Driver Pretensioner Deployment Loop Resistance Above Threshold
B0015 0E: Driver Pretensioner Deployment Loop Resistance Below Threshold
B0019 01: Passenger Frontal Deployment Loop Stage 1 Short to Battery
B0019 02: Passenger Frontal Deployment Loop Stage 1 Short to Ground
B0019 04: Passenger Frontal Deployment Loop Stage 1 Open Circuit
B0019 0D: Passenger Frontal Deployment Loop Stage 1 Resistance Above Threshold
B0019 0E: Passenger Frontal Deployment Loop Stage 1 Resistance Below Threshold
B0020 01: Passenger Frontal Deployment Loop Stage 2 Short to Battery
B0020 02: Passenger Frontal Deployment Loop Stage 2 Short to Ground
B0020 04: Passenger Frontal Deployment Loop Stage 2 Open Circuit
B0020 0D: Passenger Frontal Deployment Loop Stage 2 Resistance Above Threshold
B0020 0E: Passenger Frontal Deployment Loop Stage 2 Resistance Below Threshold
B0022 01: Passenger Pretensioner Deployment Loop Short to Battery
B0022 02: Passenger Pretensioner Deployment Loop Short to Ground
B0022 04: Passenger Pretensioner Deployment Loop Open Circuit
B0022 0D: Passenger Pretensioner Deployment Loop Resistance Above Threshold
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 Low Control | B0015 02 | B0015 04 | B0015 0D | B0015 01 | B0015 0E
Seat Belt Pretensioner - Driver - High Control | B0015 02 | B0015 04 | B0015 0D | B0015 01 | B0015 0E
IP Module - Stage 1 - Low Control | B0019 02 | B0019 04 | B0019 0D | B0019 01 | B0019 0E
IP Module - Stage 1 - High Control | B0019 02 | B0019 04 | B0019 0D | B0019 01 | B0019 0E
IP Module - Stage 2 - Low Control | B0020 02 | B0020 04 | B0020 0D | B0020 01 | B0020 0E
IP Module - Stage 2 - High Control | B0020 02 | B0020 04 | B0020 0D | B0020 01 | B0020 0E
Seat Belt Pretensioner - Passenger - Low Control | B0022 02 | B0022 04 | B0022 0D | B0022 01 | B0022 0E
Seat Belt Pretensioner - Passenger - High 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 more 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 commands the AIR BAG indicator ON via serial data communications.

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

### Conditions for Clearing the DTC

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

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

### Diagnostic Aids

Each air bag module requires a specific adapter to connect the load tool to the SIR system. For specific tool information refer to Special Tools .

### Reference Information

#### Schematic Reference

SIR Schematics

#### Connector End View Reference

SIR 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

• | Scan Tool Data List

• | Scan Tool Data Definitions

#### Special Tools Required

J 38715-A Driver and Passenger SIR Load Tool

### Circuit/System Testing

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

• | The pretensioner

• | The air bag module

• | The SDM module

• | The air bag wiring harness connector

• | The SDM wiring harness connector

1. Ignition OFF, disconnect the harness connector at the applicable air bag module.
2. With the applicable adaptor, connect special tool J 38715-A .
3. Ignition ON, with a scan tool, verify DTC is set as current.

⇒ | If DTC is not set or is set as history, replace the applicable air bag module.

4. Ignition OFF, disconnect special tool J 38715-A and the applicable adaptor.
5. Ignition ON, test for less than 1-volt between the applicable HI circuit and ground.

⇒ | If not the specified range, test the circuit for a short to voltage.

6. Test for less than 1-volt between the applicable LOW circuit and ground.

⇒ | If not the specified range, test the circuit for a short to voltage.

7. Ignition OFF, test for infinite resistance between the applicable HI circuit and ground.

⇒ | If not the specified range, test the circuit for a short to ground.

8. Test for infinite resistance between the applicable LOW circuit and ground.

⇒ | If not the specified range, test the circuit for a short to ground.

9. Disconnect the harness connector at the SDM.
10. Test for less then 1 ohm of resistance between the SDM connector and the air bag module connector HI circuit.

⇒ | If not the specified range, test the circuit for an open/high resistance.

11. Test for less then 1 ohm of resistance between the SDM connector and the air bag module connector LOW circuit.

⇒ | If not the specified range, test the circuit for an open/high resistance.

12. 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