Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC B0081 0F: Passenger Presence System ErraticDTC 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 instrument panel cluster to illuminate both of the PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. If the SDM 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 illuminate the AIR BAG indicator.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
Any of the following conditions must exist for 5 seconds:
B0081 0F
| • | The SDM has received a fault present message from the PPS. |
| • | The PPS is in assembly plant mode and the SDM is in production mode. |
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 has failed the rezeroing procedure.
B0081 5A
| • | The PPS has lost communications with the SDM. |
| • | When the PPS has requested the passenger air bag indicator to change states (from ON to OFF or OFF to ON) and the SDM change states message does not match with the PPS message. |
| • | After the PPS change states, the SDM signal stating the Passenger Status Data Received is not valid within 2.6 seconds. |
B0081 71
The SDM has received invalid or no serial data from the PPS.
Action Taken When the DTC Sets
| • | The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator. |
| • | The I/P module deployment loop will be disable. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC no longer exists. |
| • | A history DTC will clear once 100 malfunction-free ignition cycles have occurred. |
Diagnostic Aids
If either the SDM or PPS were replaced, verify that the correct part numbers were used for the vehicle application.
Reference Information
Schematic Reference
Connector End View Reference
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:
• PPS module • SDM • PPS module harness connector • SDM wiring harness connector
- Ignition ON, verify no PPS DTCs are set.
- Verify the correct PPS part number is installed in the vehicle.
- Ignition OFF, disconnect the harness connector at the PPS module.
- Ignition OFF, test for less then 10 ohms between the ground circuit terminal 6 and ground.
- Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
- Reconnect all PPS components and perform the Passenger Presence System Programming and Setup.
- Clear all DTCs and operate the vehicle within the conditions for running the DTC. DTC B0081 should not set.
| ⇒ | If any PPS DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. |
| ⇒ | If the incorrect PPS is installed, replace with the correct PPS. |
| ⇒ | If greater then the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
| ⇒ | If DTC B0081 sets, replace the PPS. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for PPS and SDM replacement, setup, and programming |
