When you first turn the ignition switch to the ON position, the inflatable restraint Sensing and Diagnostic Module (SDM) performs tests to diagnose critical malfunctions within itself. The SDM internally monitors the side air bag sensor, the safing sensor, the drive circuit, the diagnosis circuit and the ignition control. If a malfunction is detected, the SDM will set a DTC and illuminate the AIR BAG warning lamp.
The SDM detects a short or open in any of the side impact sensor circuits.
The SDM detects a malfunction in the inflatable restraint side impact sensor.
• | The SDM sets a Diagnostic Trouble Code. |
• | The SDM flashes the AIR BAG warning lamp. |
All DTCs are cleared with each ignition cycle.
This test checks for an open or high resistance condition in the PNK wire.
This test checks for an open or high resistance condition in the BLU/YEL wire.
This test checks for an open or high resistance condition in the LT GRN wire.
This test checks for an open or high resistance condition in the GRY wire.
This test checks for a short to ground in the PNK wire.
This test checks for a short to ground in the BLU/YEL wire.
This test checks for a short to ground in the LT GRN wire.
This test checks for a short to ground in the GRY wire.
This test checks for a short to voltage in the PNK wire.
This test checks for a short to voltage in the BLU/YEL wire.
This test checks for a short to voltage in the LT GRN wire.
This test checks for a short to voltage in the GRY wire.
This test checks for a short between any of the RH side impact sensor circuits.
Step | Action | Value(s) | Yes | No |
---|---|---|---|---|
1 | Was the SIR Diagnostic System Check performed? | -- | Go to Step 2 | |
Is the measured resistance within the specified range? | 0-0.5ohms | Go to Step 3 | Go to Step 15 | |
Is the measured resistance within the specified range? | 0-0.5ohms | Go to Step 4 | Go to Step 16 | |
Is the resistance measured less than the specified value? | 0-0.5ohms | Go to Step 5 | Go to Step 17 | |
Is the resistance measured less than the specified value? | 0-0.5ohms | Go to Step 6 | Go to Step 18 | |
Measure the resistance between the SDM harness connector C3 terminal 12 and ground. Is the resistance measured equal to the specified value? | OL (Infinite) | Go to Step 7 | Go to Step 19 | |
Measure the resistance between the SDM harness connector C3 terminal 10 and ground. Is the resistance measured equal to the specified value? | OL (Infinite) | Go to Step 8 | Go to Step 20 | |
Measure the resistance between the SDM harness connector C3 terminal 9 and ground. Is the resistance measured less than the specified value? | OL (Infinite) | Go to Step 9 | Go to Step 21 | |
Measure the resistance between the SDM harness connector C3 terminal 7 and ground. Is the resistance measured equal to the specified value? | OL (Infinite) | Go to Step 10 | Go to Step 22 | |
Measure the voltage between the SDM harness connector C3 terminal 12 and ground. Is the voltage measured less than the specified value? | 1 V | Go to Step 11 | Go to Step 23 | |
Measure the voltage between the SDM harness connector C3 terminal 10 and ground. Is the voltage measured less than the specified value? | 1 V | Go to Step 12 | Go to Step 24 | |
Measure the voltage between the SDM harness connector C3 terminal 9 and ground. Is the voltage measured less than the specified value? | 1 V | Go to Step 13 | Go to Step 25 | |
Measure the voltage between the SDM harness connector C3 terminal 7 and ground. Is the voltage measured less than the specified value? | 1 V | Go to Step 14 | Go to Step 26 | |
Inspect the RH side impact sensor harness for damage which may cause a short between the circuits. Is any damage evident? | -- | Go to Step 27 | Go to Step 28 | |
15 | Repair an open or high resistance condition in the PNK wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
16 | Repair an open or high resistance condition in the BLU/YEL wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
17 | Repair an open or high resistance condition in the LT GRN wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
18 | Repair an open or high resistance condition in the GRY wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
19 | Repair a short to ground in the PNK wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
20 | Repair a short to ground in the BLU/YEL wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
21 | Repair a short to ground in the LT GRN wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
22 | Repair a short to ground in the GRY wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
23 | Repair a short to voltage in the PNK wire. Refer to Wiring Repair . Are all the repairs complete? | -- | Go to Step 30 | -- |
24 | Repair a short to voltage in the BLU/YEL wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
25 | Repair a short to voltage in the LT GRN wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
26 | Repair a short to voltage in the GRY wire. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
27 | Repair the RH side impact sensor harness. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 30 | -- |
28 |
Is DTC 32 present? | -- | Go to Step 29 | |
29 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Are the repairs complete? | -- | Go to Step 30 | -- |
30 | Reconnect all SIR components. Make sure all components are properly mounted. Have all the SIR components been reconnected and properly mounted? | -- | -- |