Code 28 (Chart 1) - Current Sink Or Source Failure: Description

During INITIATOR CIRCUIT RESISTANCE tests, Diagnostic Energy Reserve Module (DERM) injects a 150-milliampere current from DRIVER SENSE HIGH output to PASS SENSE LOW output for 50 milliseconds. Once completed, DERM injects a 150-milliampere current from PASS SENSE HIGH output to DRIVER SENSOR LOW output for 50 milliseconds. During these operations, DERM monitors voltage at SENSE LOW inputs and calculates voltage differences between driver and passenger SENSE HIGH and SENSE LOW terminals. Voltage differences are used to determine resistance of each initiator circuit. Code 28 indicates slightly high or low initiator circuit resistance. This is most likely caused by poor terminal contact at connectors leading to either inflator module.