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 an overview of each diagnostic category

### DTC Descriptors

DTC B0016 01: Driver Curtain Deployment Loop Initiator Short to Battery
DTC B0016 02: Driver Curtain Deployment Loop Initiator Short to Ground
DTC B0016 08: Driver Curtain Deployment Loop Initiator Signal Invalid
DTC B0016 0D: Driver Curtain Deployment Loop Initiator Resistance Above Threshold
DTC B0016 0E: Driver Curtain Deployment Loop Initiator Resistance Below Threshold

### Diagnostic Fault Information

Circuit | Short to Ground | High Resistance | Low Resistance | Short to Voltage | Open
--- | --- | --- | --- | --- | ---
Roof Rail Module - Driver High | B0016 02 | B0016 0D | B0016 0E | B0016 01 | B0016 08
Roof Rail Module - Driver Low | B0016 02 | B0016 0D | B0016 0E | B0016 01 | B0016 08
Roof Rail Module - Passenger High Control | B0023 02 | B0023 0D | B0023 0E | B0023 01 | B0023 08
Roof Rail Module - Passenger Low Control | B0023 02 | B0023 0D | B0023 0E | B0023 01 | B0023 08

### 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 roof rail module. 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 roof rail module connector which will short together both roof rail module - driver 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

#### B0016 01

The roof rail module - driver high and/or low control circuit is shorted to voltage for 2 seconds.

#### B0016 02

The roof rail module - driver high and/or low control circuit is shorted to ground for 2 seconds.

#### B0016 08

The roof rail module - driver high and/or low control circuit is invalid during SDM initialization.

#### B0016 0D

The roof rail module - driver deployment loop resistance is more than 5.5 ohms for 2 seconds.

#### B0016 0E

The roof rail module - driver deployment loop resistance is less than 1.1 ohms for 2 seconds.

### 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 is no longer present

• | A history DTC will clear after 100 fault-free ignition cycles

### Reference Information

#### Schematic Reference

SIR Schematics

#### Connector End View Reference

Component Connector End Views

#### 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

### Circuit/System Testing

Important: Refer to SIR Service Precautions.

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

• | Roof rail module - driver

• | SDM module

• | Roof rail module - driver 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 shoring-bars within the connector allowing the deployment circuit to operate properly.

1. Ignition OFF, disconnect the harness connector at the driver inflatable roof rail restraint module.
2. Ignition ON, verify that the scan tool Driver Curtain Airbag Squib Circuit Resistance parameter is greater than 5.4 ohms at the control circuits.

⇒ | If less than the specified range, test the control circuits for a short to ground. If the circuits test normal, replace the SDM.

3. Connect a fused jumper wire in between the roof rail module terminal 1 and terminal 2.
4. Ignition ON, verify that the scan tool Driver Curtain Airbag Squib Circuit Resistance parameter is less than 1.2 ohms at the control circuits.

⇒ | If greater than the specified range, test the control circuits for a short to voltage or an open/high resistance. If the circuits test normal, replace the SDM.

5. If all circuits test normal, replace the driver inflatable roof rail restraint module.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Inflatable Restraint Roof Side Rail Module Replacement - Front

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