• | 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 | Open | Short to Voltage | Signal Performance |
---|---|---|---|---|---|
Side Impact Module - Driver - Low Control | B0014 02 | B0014 04 | B0014 0D | B0014 01 | B0014 0E |
Side Impact Module - Driver - High Control | B0014 02 | B0014 04 | B0014 0D | B0014 01 | B0014 0E |
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 |
Roof Rail Module - Left - Low Control | B0016 02 | B0016 04 | B0016 0D | B0016 01 | B0016 0E |
Roof Rail Module - Left - High Control | B0016 02 | B0016 04 | B0016 0D | B0016 01 | B0016 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 |
Roof Rail Module - Right - Low Control | B0023 02 | B0023 04 | B0023 0D | B0023 01 | B0023 0E |
Roof Rail Module - Right - High Control | B0023 02 | B0023 04 | B0023 0D | B0023 01 | B0023 0E |
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 airbag 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.
Ignition voltage is between 9-16 volts.
The airbag module high and/or low circuit is short to voltage for 120 milliseconds.
The airbag module high and/or low circuit is short to ground for 120 milliseconds.
The airbag module high and/or low circuit is open for 120 milliseconds.
The airbag module deployment loop resistance is more than 3.9 ohms for 120 milliseconds.
The airbag module deployment loop resistance is less than 1.1 ohms for 120 milliseconds.
• | 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. |
• | The condition responsible for setting the DTC no longer exists. |
• | A history DTC will clear once 100 malfunction-free ignition cycles have occurred. |
SIR System Description and Operation
J 38715-A Driver and Passenger SIR Load Tool
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
• | I/P Module - Stage 1 terminal 10 |
• | I/P Module - Stage 2 terminal 6 |
• | Left Front Roof Rail Module terminal 13 |
• | Right Front Roof Rail Module terminal 14 |
• | Seat Belt Pretensioner - Left terminal 17 |
• | Seat Belt Pretensioner - Right terminal 18 |
⇒ | If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the SDM. |
• | I/P Module - Stage 1 terminal 11 |
• | I/P Module - Stage 2 terminal 7 |
• | Left Front Roof Rail Module terminal 12 |
• | Right Front Roof Rail Module terminal 15 |
• | Seat Belt Pretensioner - Left terminal 19 |
• | Seat Belt Pretensioner - Right terminal 16 |
⇒ | If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the SDM. |
• | I/P Module - Stage 1 terminal 10 |
• | I/P Module - Stage 2 terminal 6 |
• | Left Front Roof Rail Module terminal 13 |
• | Right Front Roof Rail Module terminal 14 |
• | Seat Belt Pretensioner - Left terminal 17 |
• | Seat Belt Pretensioner - Right terminal 18 |
⇒ | If not the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the SDM. |
• | I/P Module - Stage 1 terminal 11 |
• | I/P Module - Stage 2 terminal 7 |
• | Left Front Roof Rail Module terminal 12 |
• | Right Front Roof Rail Module terminal 15 |
• | Seat Belt Pretensioner - Left terminal 19 |
• | Seat Belt Pretensioner - Right terminal 16 |
⇒ | If not the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the SDM. |
⇒ | If DTC is not set or is set as history, replace the applicable air bag module. |
• | I/P Module - Stage 1 terminal 10 |
• | I/P Module - Stage 2 terminal 6 |
• | Left Front Roof Rail Module terminal 13 |
• | Right Front Roof Rail Module terminal 14 |
• | Seat Belt Pretensioner - Left terminal 17 |
• | Seat Belt Pretensioner - Right terminal 18 |
⇒ | If not within the specified range, test the circuit for an open/high resistance. |
• | I/P Module - Stage 1 terminal 11 |
• | I/P Module - Stage 2 terminal 7 |
• | Left Front Roof Rail Module terminal 12 |
• | Right Front Roof Rail Module terminal 15 |
• | Seat Belt Pretensioner - Left terminal 19 |
• | Seat Belt Pretensioner - Right terminal 16 |
⇒ | If not within the specified range, test the circuit for an open/high resistance. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for SDM replacement, setup, and programming |