B0014
CIRCUIT DESCRIPTIONThe passenger frontal deployment loop consists of the following components:
^ A dual stage inflatable restraint I/P module
^ The inflatable restraint I/P module wiring harness
^ The I/P module high circuits for both stages 1& 2
^ The I/P module low circuits for both stages 1& 2
These shorting bars short together the I/P module stage 1 high circuits, and low circuits, and the I/P module stage 2 high circuits and low circuits when the connector is disconnected. This prevents 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. This flow of current will 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.
CONDITIONS FOR RUNNING THE DTC
Ignition 1 voltage is within the normal operating voltage range.
CONDITIONS FOR SETTING THE DTC
^ 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 occurs:
- 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 circuits 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.
ACTION TAKEN WHEN THE DTC SETS
The SDM commands the AIR BAG indicator ON via Class 2 serial data.
CONDITIONS FOR CLEARING THE DTC
^ The condition responsible for setting the DTC is not currently present, 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 I/P module stage 1or stage 2, high and low circuits.
^ An open or a high resistance in the I/P module stage 1or stage 2, high or low circuits.
^ A short to ground or a short to voltage in the I/P module stage 1or stage 2, high or low circuits.
^ A malfunctioning I/P module connector
^ A malfunctioning 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 Diagnostic Aids for Circuit Testing and Wiring Repair Procedures.
TEST DESCRIPTION
Steps 1-3:
Steps 4-5:
Steps 6-9:
The numbers below refer to the step numbers on the diagnostic table.
4. Tests if the malfunction is caused by the I/P module.
6. Determines which DTCs are present. If DTC B0012 or B0016 is present, test the I/P module for a short between high circuits and low circuits in stage 1 or stage 2. If DTC B0013 or B0017 is present, test the I/P module high circuits 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.