DTC B1406: Ppd Defect

Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM . Remove driver-side air bag module. Disconnect passenger-side air bag module and seat belt pretensioner connectors. Disconnect SRSCM connector. Go to next step.
Check continuity of high-side and low-side circuits of PPD wire harness between SRSCM and PPD interface unit. If continuity exists in both circuits, go to next step. If continuity does not exist in both circuits, replace wire harness between SRSCM and PPD interface unit.
Check continuity of high-side and low-side circuits of PPD wire harness between PPD interface unit and PPD sensor. If continuity exists in both circuits, go to next step. If continuity does not exist in both circuits, replace wire harness between PPD interface unit and PPD sensor. See WIRING DIAGRAMS .
Measure resistance change of PPD sensor with a change of weight. Resistance of PPD should be 50 K/Ohms or less when a weight of 33 pounds (15 kg) or more is placed on PPD. Resistance of PPD should be greater than 50 K/Ohms when a weight of 1.3 pounds (0.6 kg) or less is placed on PPD. If resistance is not as specified, replace PPD. If resistance is as specified, go to next step.
NOTE: DTC's other than DTC B1406 may be retrieved by scan tool. They are not relevant to this test.
Connect SRSCM connector. Connect negative battery cable. Wait at least 30 seconds. Turn ignition on. Wait at least 30 seconds. Using scan tool, clear all DTC's. Turn ignition off. Wait at least 30 seconds. Wait at least 30 seconds. Turn ignition on. Wait at least 30 seconds. Using scan tool, retrieve SIR DTC's. If DTC B1406 is retrieved, replace PPD. If DTC B1406 is not retrieved, system is okay