Circuit Description
The passenger side deployment loop consists the following components:
| • | An inflatable restraint side impact module-RF |
| • | The inflatable restraint side impact module wiring harness |
| • | The side impact module-RF high circuits |
| • | The side impact module-RF low circuits |
A shorting bar is used within the side impact module-RF connector. The shorting bar will short together the side impact module-RF high circuit, and the side impact module-RF low circuit when the connector is disconnected. This helps prevent unwanted deployment of the inflator module during servicing. 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. This flow of current will deploy the side impact module-RF. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored in memory.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B0021 Right Front Side Deployment Loop
This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description .
DTC Symptom | DTC Symptom Descriptor |
|---|---|
01 | Short to Battery |
02 | Short to Ground |
04 | Open Circuit |
0D | Resistance Above Threshold |
0E | Resistance Below Threshold |
Conditions for Running the DTC
Ignition voltage is within the normal operating voltage range.
Conditions for Setting the DTC
B0021 01
The side impact module-RF high and/or low circuit is short to voltage for 120 milliseconds.
B0021 02
The side impact module-RF high and/or low circuit is short to ground for 120 milliseconds.
B0021 04
The side impact module-RF high and/or low circuit is open for 120 milliseconds.
B0021 0D
The side impact module-RF deployment loop resistance is more than 3.9 ohms for 120 milliseconds.
B0021 0E
The side impact module-RF 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 GMLAN serial data.
Conditions for Clearing the MIL/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. |
Diagnostic Aids
The following are possible causes of the malfunction:
| • | A short between the side impact module-RF high and low circuits |
| • | An open or a high resistance in the side impact module-RF high or low circuits |
| • | A short to ground or a short to voltage in the side impact module-RF high or low circuits |
| • | The side impact module-RF connector |
| • | The SDM connector |
| • | A malfunctioning side impact module wiring harness |
| • | A malfunctioning side impact module-RF |
| • | A malfunctioning SDM |
Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections .
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests to see if the malfunction is caused by the side impact module-RF or by the side impact-RF wiring harness.
-
This step tests to see what DTCs are present. If DTC B0021 01 is present, test the side impact module-RF for a short to battery voltage on the high and low circuits. If DTC B0021 02 is present, test the side impact module-RF for a short to ground on the high and low circuits. If DTC B0021 04, 0D, 0E is present, test the side impact module-RF test the high and low circuits for an open circuit and for high or low resistance.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: SIR Schematics Connector End View Reference: SIR Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Does connector exhibits any signs of damage or corrosion? | Go to Step 3 | Go to Step 4 |
3 |
Did you complete the repair? | Go to Step 11 | -- |
4 |
Important: The J-45289 CANdi Module must be used with the scan tool. Does the scan tool indicate that DTC B0014 is current? | Go to Step 6 | Go to Step 5 |
Does the scan tool indicate that DTC B0014 is current? | Go to Step 9 | Go to Step 8 | |
6 |
Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
Did you find and correct the condition? | Go to Step 11 | Go to Step 10 | |
8 |
Did you complete the replacement? | Go to Step 11 | -- |
9 |
Did you complete the replacement? | Go to Step 11 | -- |
10 |
Did you complete the replacement? | Go to Step 11 | -- |
11 |
Does the DTC reset? | Go to Step 2 | System OK |
