Diagnostic Instructions

DTC Descriptors

DTC B0081 0F: Passenger Presence System Erratic

DTC B0081 11: Passenger Presence System Above Maximum Threshold

DTC B0081 39: Passenger Presence System Internal Electronic Failure

DTC B0081 3A: Passenger Presence System Incorrect Component Installed

DTC B0081 4B: Passenger Presence System Calibration Not Learned

DTC B0081 5A: Passenger Presence System Plausibility Failure

DTC B0081 71: Passenger Presence System Invalid Serial Data Received

Circuit/System Description

When the ignition is turned ON, the passenger presence system (PPS) and the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. When the SDM has completed the power-up mode, the SDM will establish communication with the PPS. The SDM will also request the both of the PASSENGER AIR BAG ON/OFF indicators illuminate for 5 seconds. The SDM will then transmit a request message to the PPS to receive the PPS verification ID. The PPS will transmit the verification ID to the SDM, and the SDM will compare the ID received to data stored in memory. If the data stored in memory does not match the information transmitted by the PPS or the SDM has detects that the PPS has set a current DTC, the SDM will then disable the instrument panel (I/P) module deployment loop, set DTC B0081, and command the AIR BAG indicator ON.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

The following conditions exist for 5 seconds:

B0081 0F

B0081 11

Voltage at the PPS is at the maximum calibrated threshold.

B0081 39

The SDM has received a fault message from the PPS.

B0081 3A

The SDM has received a message from the PPS indicating a vehicle and PPS mismatch.

B0081 4B

The PPS is not calibrated.

B0081 5A

The PPS detects a plausibility error.

B0081 71

The SDM has received invalid or no serial data from the PPS.

Action Taken When the DTC Sets

Conditions for Clearing the DTC

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Testing

Important: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:

•

The SDM

•	The PPS module harness connector

•	The SDM wiring harness connector

1. Ignition ON, verify no PPS DTCs are set.

⇒	If any PPS DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .

2. Verify the correct PPS part number is installed in the vehicle.

⇒	If the incorrect PPS is installed, replace with the correct PPS.

3. Ignition OFF, disconnect the harness connector at the PPS module.
4. Ignition OFF, test for less then 10 ohms between the ground circuit terminal D and ground.

⇒	If greater then the specified range, test the ground circuit for an open/high resistance.

5. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground.

⇒	If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

6. Reconnect all PPS components and perform the Passenger Presence System Programming and Setup .
7. Clear all DTCs and operate the vehicle within the conditions for running the DTC. DTC B0081 should not set.

⇒	If DTC B0081 sets, replace the PPS.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.