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: Left Roof Rail Deployment Loop Short to Battery
DTC B0016 02: Left Roof Rail Deployment Loop Short to Ground
DTC B0016 04: Left Roof Rail Deployment Loop Open Circuit
DTC B0016 0D: Left Roof Rail Deployment Loop Resistance Above Threshold
DTC B0016 0E: Left Roof Rail Deployment Loop Resistance Below Threshold

### Diagnostic Fault Information

Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance
--- | --- | --- | --- | --- | ---
Roof Rail Module - Left High Circuit | B0016 02 | B0016 0D | B0016 04 | B0016 01 | B0016 0E
Roof Rail Module - Left Low Circuit | B0016 02 | B0016 0D | B0016 04 | B0016 01 | B0016 0E

### 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 side 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 - left 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 - left high and/or low circuit is short to voltage for 120 milliseconds.

#### B0016 02

The roof rail module - left high and/or low circuit is short to ground for 120 milliseconds.

#### B0016 04

The roof rail module - left high and/or low circuit is open for 120 milliseconds.

#### B0016 0D

The roof rail module - left deployment loop resistance is more than 3.9 ohms for 120 milliseconds.

#### B0016 0E

The roof rail module - left 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 SIR system is disabled and no deployments are allowed.

### Conditions for Clearing the DTC

• | The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

• | A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

### Reference Information

#### Schematic Reference

SIR Schematics

#### Connector End View Reference

SIR Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

• | SIR/SRS Wiring Repairs

#### Special Tools Required

• | J 38715-A SIR Driver/Passenger Load Tool

• | J 38715-5 SIR Load Tool Adapter

### 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 roof rail module- left

• | The SDM module

• | The roof rail module- left wiring harness connector

• | The SDM wiring harness connector

1. Ignition OFF, remove the left garnish molding - lock pillar upper and disconnect the roof rail module - left in-line connector. Refer to Lock Pillar Upper Garnish Molding Replacement .
2. Use the J 38715-5 adapter to connect the J 38715-A to the harness side of the roof rail module - left in-line connector. Use the PASSENGER INFLATOR connector located on the load tool.
3. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0016 is set in history.

⇒ | If DTC B0016 is history replace the roof rail module - left.

4. Ignition OFF, disconnect and remove both the J 38715-A and adapter, then remove the SDM connector.
5. Test the high and low circuits between the SDM and roof rail module - left for a short to voltage, short to ground, or open/low resistance.

⇒ | If any of the above conditions are found make the appropriate repair.

6. If all circuits test normal then replace the SDM.

### 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