Chart B Flash Code Diagnosis

I�JPDiagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION
When the DERM recognizes "Ignition 1" voltage, applied to terminal "A9" and "A10," is in the normal operating voltage range the "AIR BAG" warning lamp is flashed 7 times to verify operation. At this time the DERM performs "Turn-ON" tests followed by "Continuous Monitoring" tests. When no malfunctions are detected the DERM proceeds to the "Initiator Assembly Resistance Test." When a malfunction is detected the DERM sets a current diagnostic trouble code and illuminates the "AIR BAG" warning lamp. The DERM will clear current diagnostic trouble codes and move them to a history file when the malfunction is no longer detected and/or the ignition switch is cycled, except for DTC 51. DTC 51 can only be cleared using a scan tool "Clear Codes" command.

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This test determines whether "Flash Code" diagnostics can be enabled.
2. This test checks for a good ground at the data link connector.
3. This test checks for an open in the "Diagnostic Request" circuit.
4. This test checks for a short to B in the "Diagnostic Request" circuit.
5. This test determines whether further diagnosis is required.
6. This test determines whether only history or both current and history diagnostic trouble codes exist.