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B0017

DTC B0017 RF/Passenger Frontal Deployment Loop (Single Stage or Stage1) Open

Schematic:






CIRCUIT DESCRIPTION
When you first turn the ignition switch to the RUN position, the inflatable restraint Sensing and Diagnostic Module (SDM) performs tests to diagnose critical malfunctions within itself. The SDM then performs the following continuous diagnostic tests on the deployment loops:
^ Deployment loop voltage out of range test
^ Deployment loop resistance measurement test

If the voltage out of range test detects a short to voltage condition, the resistance measurement test for that deployment loop will not be performed.

CONDITIONS FOR RUNNING THE DTC
^ Ignition 1 voltage is within the normal operating voltage range.
^ Passenger frontal deployment loop is not shorted to voltage.
^ Passenger frontal deployment loop is not shorted to ground.

CONDITIONS FOR SETTING THE DTC
^ The SDM detects the resistance between the passenger frontal high side and low side of the deployment loop is greater than 4.8 Ohms for 300 milliseconds.
^ The SDM detects the voltage at the passenger frontal high is less than 2.4 Volts and passenger frontal high to low side resistance is 6 Ohms or greater for 300 milliseconds.

ACTION TAKEN WHEN THE DTC SETS
^ The SDM commands ON the AIR BAG warning lamp via Class 2 serial data.
^ The SDM also sets this DTC as current after an accident. The SDM will write the status of this DTC to the "crash log" area of the EEPROM for retrieval.

CONDITIONS FOR CLEARING THE DTC
^ Passenger frontal deployment loop resistance is 4.8 Ohms or less for 300 milliseconds.
^ Passenger frontal high voltage is greater than 2.4 Volts and passenger frontal high to passenger frontal low side resistance is less than 6 Ohms for 300 milliseconds.
^ You issue a scan tool CLEAR CODES command.
^ A history DTC will clear once 255 malfunction free ignition cycles have occurred.

When the SDM detects that no DTCs are present, the SDM commands the AIR BAG warning lamp OFF.

DIAGNOSTIC AIDS
The following can cause an intermittent condition:
^ A short between the passenger frontal high and the passenger frontal low circuits.
^ A malfunctioning shorting bar on the inflatable restraint IP module 2-way connector.
^ Refer to Testing for Intermittent and Poor Connections in Diagrams.

TEST DESCRIPTION

Test Step 1 - Step 7:





Test Step 8 - Step 14:






The number(s) below refer to the step number(s) on the diagnostic table.
2. This step inspects the inflatable restraint IP module in-line connector.
5. Tests for a malfunctioning inflatable restraint IP module.
7. This step checks to see if the inflatable restraint sensing and diagnostic module (SDM) wiring harness connector is OK.
9. Tests for an open or high resistance in the passenger frontal high deployment circuit.
11. Tests for an open or high resistance in the passenger frontal low deployment circuit or if there is a malfunctioning SDM.