The passenger frontal deployment loop consists of the following components:
• | A dual stage inflatable restraint instrument panel (I/P) module |
• | The I/P module high circuits for both stages 1 and 2 |
• | The I/P module low circuits for both stages 1 and 2 |
There are 2 shorting bars used within the I/P module connector which will short together both I/P module stage 1 high and low circuits, and both I/P module stage 2 high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. During a 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 I/P module. 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.
This diagnostic procedure supports the following DTCs:
• | DTC B0012 Passenger Frontal Deployment Loop (Stage 2) Resistance Low |
• | DTC B0013 Passenger Frontal Deployment Loop (Stage 2) Open |
• | DTC B0014 Passenger Frontal Deployment Loop (Stage 2) Voltage Out of Range |
• | DTC B0016 Passenger Frontal Deployment Loop (Single Stage or Stage 1) Resistance Low |
• | DTC B0017 Passenger Frontal Deployment Loop (Single Stage or Stage 1) Open |
• | DTC B0018 Passenger Frontal Deployment Loop (Single Stage or Stage 1) Voltage Out of Range |
Ignition 1 voltage is within the normal operating voltage range.
• | DTC B0012 stage 2 or B0016 stage 1 will set when the I/P module deployment loop resistance is less than 1.3 ohms for 500 milliseconds. |
• | DTC B0013 stage 2 or B0017 stage 1 will set when one of the following conditions occur: |
- | The I/P module high circuit is less than 2.4 volts and the I/P module deployment loop is more than 6 ohms for 500 milliseconds. |
- | The I/P module deployment loop resistance is more than 4.8 ohms for 500 milliseconds. |
• | DTC B0014 stage 2 or B0018 stage 1 will set when one of the following conditions occur: |
- | The I/P module high and/or low circuits is short to ground or short to voltage for 500 milliseconds. |
- | The I/P module high circuit is less than 2.4 volts and I/P module deployment loop resistance is less than 6 ohms for 500 milliseconds. |
The SDM commands the AIR BAG indicator ON via class 2 serial data.
• | 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. |
The following are possible causes of the malfunction:
• | A short between the I/P module stage 1 or stage 2, high and low circuits |
• | An open or a high resistance in the I/P module stage 1 or stage 2, high or low circuits |
• | A short to ground or a short to voltage in the I/P module stage 1 or stage 2, high or low circuits |
• | The I/P module connector |
• | The SDM connector |
• | A malfunctioning I/P module |
• | 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 .
The numbers below refer to the step numbers on the diagnostic table.
This step tests to see if the malfunction is caused by the I/P module.
This step tests to see what DTCs are present. If DTC B0012 or B0016 is present, test the I/P module for a short between high and low circuits in stage 1 or stage 2. If DTC B0013 or B0017 is present, test the I/P module high and low circuits for an open and for high resistance in stage 1 or stage 2. If DTC B0014 or B0018 is present, test the I/P module high and low circuits for a short to ground and for a short to voltage in stage 1 or stage 2.
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 the connector exhibit any signs of damage or corrosion? | Go to Step 3 | Go to Step 4 |
3 |
Did you complete the repair? | Go to Step 9 | -- |
Important: If scan tool displays multiple codes, diagnose the open code first. Does the scan tool indicate that DTC B0012, B0013, B0014, B0016, B0017, or B0018 are current? | Go to Step 5 | Go to Step 7 | |
5 |
Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
Did you find and correct the condition? | Go to Step 9 | Go to Step 8 | |
7 |
Did you complete the replacement? | Go to Step 9 | -- |
8 |
Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |