B1051

When measurements are requested in this table, use J 39200 Digital Multimeter with correct terminal adapter from J 35616-A Connector Test Adapter Kit. When a check for proper connection is requested, refer to Intermittents and Poor Connections in Diagrams. When a wire, connector or terminal repair is requested, use J 38125-A Terminal Repair Kit and refer to Wiring Repair.

CIRCUIT DESCRIPTION
The inflatable restraint Diagnostic Energy Reserve Module (DERM) detects a closure of the inflatable restraint arming sensor when the voltage at the Driver Side High terminal B9 measures within the amount of its deployment loop supply voltage. The DERM detects a closure of either inflatable restraint discriminating sensor when the voltage at the Driver Side Low terminal B8 measures within the specified amount of ground potential. When both conditions are met simultaneously for no less than 250 microsecond, the DERM records Crash Data and sets the DTC B1051.

CONDITIONS FOR SETTING THE DTC
The DTC sets when the DERM detects simultaneously the closure of the inflatable restraint arming sensor and at least one inflatable restraint discriminating sensor for no less than 250 microseconds.

ACTION TAKEN WHEN THE DTC SETS
The DERM turns on the AIR BAG warning lamp, records the Crash Data, and sets a diagnostic trouble code.

CONDITIONS FOR CLEARING THE DTC
The DTC clears when the DERM receives a scan tool Clear Codes command.

TEST DESCRIPTION
Refer to step numbers on the diagnostic table.
1. Start at the SIR Diagnostic System Check for all diagnosis.
2. When DTC B1042 and DTC B1051 are set simultaneously, perform the DTC B1042 diagnosis first. B1042
3. If the inflatable restraint steering wheel inflator module has not deployed, DTC B1051 may have set falsely.
4. If DTC B1051 has set with no signs of frontal impact, the diagnostic trouble code DTC has set falsely.
5. When a frontal crash has occurred, it is necessary to perform the indicated procedures to ensure the SIR system is fully functional.
6. This test checks for a DERM malfunction setting the DTC.
7. This test checks for a DERM malfunction setting the DTC.
8. This test determines whether the DTC was set inadvertently during diagnosis or by a DERM malfunction.