B0028

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

Wiring Diagram:

CIRCUIT DESCRIPTION
The RF/passenger inflatable restraint side impact inflator module deployment loop is a 2 wire circuit. When you first turn ON the ignition, the inflatable restraint Sensing and Diagnostic Module (SDM) performs tests to diagnose critical malfunctions within itself. Then the SDM 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.
^ RF side deployment loop is not open.
^ RF side deployment loop is not shorted to voltage.
^ RF side deployment loop is not shorted to ground.

CONDITIONS FOR SETTING THE DTC
RF side deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

ACTION TAKEN WHEN THE DTC SETS
The SDM commands ON the AIR BAG warning lamp via Class 2 serial data.

CONDITIONS FOR CLEARING THE DTC
^ The resistance of the RF side deployment loop is at least 1.3 ohms or more for 500 milliseconds.
^ You can issue a CLEAR CODES command
^ A history DTC will clear once 255 malfunction free ignition cycles have occurred

DIAGNOSTIC AIDS
The following can cause an intermittent condition:
^ A short between the RF side high and the RF side low circuits.
^ A malfunctioning shorting bar on the inflatable restraint side impact inflator module 2-way harness connector.
^ Refer to Intermittents and Poor Connections in Diagrams.

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. This step checks the RF/passenger side air bag in-line connector for physical damage.
5. This step checks to see if there is a malfunctioning RF side air bag (inflatable restraint side impact inflator module).
7. This step determines if there is a short between RF side high and low deployment circuits or if there is a malfunctioning SDM.