• | 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 |
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 |
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.
Ignition voltage is between 9-16 volts.
The roof rail module - driver high and/or low control circuit is shorted to voltage for 2 seconds.
The roof rail module - driver high and/or low control circuit is shorted to ground for 2 seconds.
The roof rail module - driver high and/or low control circuit is invalid during SDM initialization.
The roof rail module - driver deployment loop resistance is more than 5.5 ohms for 2 seconds.
The roof rail module - driver deployment loop resistance is less than 1.1 ohms for 2 seconds.
• | 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. |
• | The condition for setting the DTC is no longer present |
• | A history DTC will clear after 100 fault-free ignition cycles |
Control Module References for scan tool information
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.
⇒ | If less than the specified range, test the control circuits for a short to ground. If the circuits test normal, replace the SDM. |
⇒ | 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. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for SDM replacement, setup, and programming |