DTC 16

Wiring Diagram:

CIRCUIT DESCRIPTION

When the ignition switch is turned to "ON," the SDM will perform tests to diagnose critical malfunctions within itself. Upon passing these tests "Ignition 1," 23 VLR, and deployment loop voltages are measured to ensure they are within their respective normal voltage ranges. The SDM then proceeds with the "Resistance Measurement Test." "Passenger Side Low" terminal "3" is grounded through a resistor and the passenger current source connected to "Passenger Side High" terminal "4" allows a known amount of current to flow. By monitoring the voltage difference between "Passenger Side High" and "Passenger Side Low" the SDM calculates the combined resistance of the passenger inflator module, harness wiring CKTs Y/R and Y and connector terminal contact.

DTC WILL SET WHEN

The combined resistance of the passenger inflator module, harness wiring CKTs Y/R and Y and connector terminal contact is below 1.4 ohms. This test is run once each ignition cycle during the "Resistance Measurement Test" when:

1. No "higher priority faults" are detected during "Turn-ON,"

2. "Ignition 1" voltage is above a specified value.

ACTION TAKEN

SDM turns "ON" the "AIR BAG" warning lamp and sets a diagnostic trouble code.

DTC WILL CLEAR WHEN

The ignition switch is cycled.

DTC CHART TEST DESCRIPTION

Numbers below refer to circled numbers on the diagnostic chart.

1. Recording "Pass. Resist." after each Ignition to "ON" may help to locate the fault. The "Pass. Resist." value is updated each ignition cycle.

2. This test verifies proper connection of the passenger inflator module yellow 4-way connector.

3. This test checks for a malfunctioning passenger inflator module.

4. This test determines whether the malfunction is due to a short between CKT Y/R and Y.

5. This test determines whether the malfunction is due to a short between CKT Y/R and G/R.

DIAGNOSTIC AIDS

An intermittent condition is likely to be caused by a short from CKT Y/R to CKT G/R, CKT G or CKT Y, or a malfunctioning shorting bar on the passenger inflator module pigtail connector which would require replacement of the module. The test for this diagnostic trouble code is only run while "AIR BAG" warning lamp is performing the bulb check unless a higher priority DTC is detected. When a scan tool "Clear Codes" command is issued and the malfunction is still present, the DTC will not reappear until the next ignition cycle.