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 - 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 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 requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

• | 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.

#### 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 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:

• | 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 applicable high control circuit terminal and ground.

• | I/P Module Stage 1 terminal 18

• | I/P Module State 2 terminal 13

• | Seat Belt Pretensioner-Driver terminal 56

• | Seat Belt Pretensioner-Passenger terminal 52

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

8. Test for less than 1-volt between the applicable low control circuit terminal and ground.

• | I/P Module Stage 1 terminal 19

• | I/P Module State 2 terminal 12

• | Seat Belt Pretensioner-Driver terminal 57

• | Seat Belt Pretensioner-Passenger terminal 53

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

9. Ignition OFF, test for infinite resistance between the applicable high control circuit terminal and ground.

• | I/P Module Stage 1 terminal 18

• | I/P Module State 2 terminal 13

• | Seat Belt Pretensioner-Driver terminal 56

• | Seat Belt Pretensioner-Passenger terminal 52

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

10. Test for infinite resistance between the applicable low control circuit and ground.

• | I/P Module Stage 1 terminal 19

• | I/P Module State 2 terminal 12

• | Seat Belt Pretensioner-Driver terminal 57

• | Seat Belt Pretensioner-Passenger terminal 53

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

11. Test for less then 1 ohm between the applicable SDM connector and the air bag module connector high control circuit.

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

• | I/P Module State 2 terminal 1 X2 and SDM terminal 13

• | Seat Belt Pretensioner-Driver terminal 2 and SDM terminal 56

• | Seat Belt Pretensioner-Passenger terminal 2 and SDM terminal 52

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

12. Test for less then 1 ohm of resistance between the SDM connector and the air bag module connector low control circuit.

• | I/P Module Stage 1 terminal 2 X1 and SDM terminal 19

• | I/P Module State 2 terminal 2 X2 and SDM terminal 12

• | Seat Belt Pretensioner-Driver terminal 1 and SDM terminal 57

• | Seat Belt Pretensioner-Passenger terminal 1 and SDM terminal 53

⇒ | If greater than the specified range, test the 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