Programming and Relearning

Passenger Presence System Programming and Setup

Passenger Presence System Preload Test

The passenger presence system (PPS) consists of an electronic control module, a sensor mat in the seat, a harness, and PASSENGER AIR BAG ON/OFF indicators. The passenger presence system is designed to tell the difference between an empty seat, child seats, and a small person, such as a child who has outgrown child restraints. This is done by a combination of the force measured and the pattern generated by an occupied seat through an algorithm. A digital pressure value is generated by an occupant. The harder you push, the higher the digital pressure value. This digital pressure value is generated by an algorithm is used to determine the type of occupant sitting in the front passenger seat. If the digital pressure value measured and pattern generated is that of an empty seat, child seat, or small person, then the passenger presence module will send a serial data signal to the inflatable restraint sensing and diagnostic module to disable the passenger instrument panel air bag. If the digital pressure value measured and pattern generated is that of a person of adult size, then the passenger presence module will send a serial data signal to the inflatable restraint sensing and diagnostic module to enable the passenger instrument panel air bag. The inflatable restraint sensing and diagnostic module will notify the customer of the enable/disable status by illuminating one of the PASSENGER AIR BAG ON/OFF indicator. If the passenger seat bottom cushion, seat bottom trim, or heater pad has been serviced, reinstalled, or removed for any reason, the procedure below will check for any preloads on the passenger presence system. A service replacement passenger presence system module does not require an unlock procedure prior to an initial preload test.

Note:

* DTC B0081 11 will set if the preload system test is performed with items on the passenger seat

* Before the passenger presence system can be checked for preloads the front passenger seat must be completely empty of all items. The presence of any items on the front passenger seat will affect the calibration and operation of the passenger presence system.

* When the preload test is performed, the instrument panel cluster and dash lights will begin illuminating at varying intensity. This is normal operation during the preload test procedure and does not indicate additional system faults.

* The Diagnostic Repair Verification Verification Tests must be performed after successfully completing the preload test procedure to ensure the system is functioning properly.

Passenger Presence System Preload System Test

1. Empty the front outboard passenger seat (this system is susceptible to heavy material).

2. With the scan tool, perform the Preload Passenger Presence System procedure.

3. Using the scan tool, check for DTC B0081 in history. If the test fails or DTC B0081 11 is current, confirm that the seat is empty. Perform the passenger presence sensor learn test again. If the test fails again, for heated seats, ensure that the sensor pad is on top of the heater element. Once the test successfully completes, cycle the ignition OFF.

4. Perform the Diagnostic Repair Verification Verification Tests after successfully completing the preload test procedure to ensure the system is functioning properly.