Test Description
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 7:
This step tests the ROS signal and ROS voltage circuits for an open or high resistance.
- 8:
This step tests between the ROS signal and ROS voltage circuits for continuity.
- 9:
This step tests the ROS signal circuit for a short to voltage.
DTC B3855, B3856, or B3857
| 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 |
Go to Diagnostic System Check - Vehicle |
| 2 |
- Install a scan tool.
- Turn ON the ignition, with the engine OFF.
- Use the scan tool to request SIR DTCs displayed.
Does the scan tool indicate that DTC B3856, or B3857 is current? |
Go to Step 10 |
Go to Step 3 |
| 3 |
- Turn OFF the ignition.
- 2. If DTC B3855 is current, disconnect the inflatable restraint rollover sensor (ROS) connector. Refer to Inflatable Restraint Vehicle Rollover Sensor Replacement .
- Inspect both the component and harness sides of the connector for damage or corrosion. Refer to Testing for Intermittent Conditions and Poor Connections
.
Does the connector exhibit any signs of damage or corrosion? |
Go to Step 4 |
Go to Step 5 |
| 4 |
- If the component side of the ROS connector is damaged, the ROS must be replaced. Refer to Inflatable Restraint Vehicle Rollover Sensor Replacement .
- If the harness side of the ROS connector is damaged, replace the harness side of the connector. Refer to Connector Repairs
.
Did you complete the repair? |
Go to Step 11 |
- |
| 5 |
- Turn OFF the ignition.
- Disconnect the inflatable restraint sensing and diagnostic module (SDM) connector. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
- Inspect both the component and harness sides of the SDM connector for damage or corrosion. Refer to Testing for Intermittent Conditions and Poor Connections
.
Does the connector exhibit any signs of damage or corrosion? |
Go to Step 6 |
Go to Step 7 |
| 6 |
- If the component side of the SDM connector is damaged, the SDM must be replaced. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
- If the harness side of the SDM connector is damaged, replace the harness side of the connector. Refer to Connector Repairs
.
Did you complete the repair? |
Go to Step 11 |
- |
| 7 |
If DTC B3855 is current, test both the ROS signal and ROS voltage circuits for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
.
Did you find and correct the condition? |
Go to Step 11 |
Go to Step 8 |
| 8 |
Test for continuity between the ROS signal circuit and the ROS voltage circuit on the ROS connector. Refer to Circuit Testing
and Wiring Repairs
.
Did you find and correct the condition? |
Go to Step 11 |
Go to Step 9 |
| 9 |
- Turn ON the ignition, with the engine OFF.
- Test the ROS signal for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
.
Did you find and correct the condition? |
Go to Step 11 |
Go to Step 10 |
| 10 |
- Turn OFF the ignition.
- If DTC B3855, B3856, or B3857 was current replace the ROS. Refer to Inflatable Restraint Vehicle Rollover Sensor Replacement .
Did you complete the replacement? |
Go to Step 11 |
- |
| 11 |
- Reconnect all SIR components.
- Use the scan tool in order to Clear the DTCs.
- Operate the vehicle within the Conditions for Running the DTC as specified in the text.
Does the DTC reset? |
Go to Step 12 |
System OK |
| 12 |
- Turn OFF the ignition.
- Replace the SDM. Refer to Control Module References
for replacement, setup, and programming.
Did you complete the replacement? |
Go to Step 13 |
- |
| 13 |
- Turn ON the ignition, with the engine OFF
- Use the scan tool in order to Clear the DTCs.
- Operate the vehicle within the Conditions for Running the DTC as specified in the text.
Does the DTC reset? |
Go to Step 2 |
System OK |