Diagnostic Instructions
DTC Descriptor
DTC 032 : Rezeroing Error Fault
Circuit/System Description
The inflatable restraint Passenger Presence System (PPS) is a calibrated unit. Anytime the passenger seat bottom cushion or trim attachments have been removed/serviced or the PPS has been replaced, the PPS system must learn the empty seat value by rezeroing.
If there is an error during the rezeroing process, the PPS will set DTC 032. DTC 056 will also set indicating a system fault until a successful rezero has been completed. When the PPS detects this DTC within the PPS it will notify the customer
of the enable/disable status by turning on the OFF indicator on the PASSENGER AIR BAG ON/OFF indicators, then the PPS will communicate to the sensing and diagnostic module (SDM) through a non GMLAN communications circuit that a PPS fault is present. The SDM
will then turn the AIR BAG indicator ON, and set DTC B0081 indicating a problem within the PPS and will suppress the deployment of the instrument panel (I/P) module.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
| • | An error occurs after a rezero command was given. |
| • | Sensor data is out of range during rezero. |
Action Taken When the DTC Sets
| • | The PPS will set a DTC 032, and then communicate with the SDM via non GMLAN circuit. |
| • | The PPS will also set DTC 056 indicating a PPS internal system fault has occurred until the re-zeroing procedure was performed. |
| • | The SDM will set DTC B0081. |
| • | The SDM disables the I/P module deployment loop. |
| • | The PPS will turn ON the passenger air bag status OFF indicator. |
| • | The SDM commands the AIR BAG indicator ON via GMLAN serial data. |
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used. |
| • | A history DTC will clear once 255 malfunction-free ignition cycles have occurred. |
Diagnostic Aids
This fault indicates that the system did not correctly rezero. You may have to perform the rezero process several times until an acceptable rezero is achieved. When the PPS has been properly rezeroed, using a scan tool a clear DTCs command must be given
to clear DTC 032 and DTC 056 from history.
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
Circuit/System Verification
Important: If DTC resets after rezeroing, it may be necessary to perform this rezeroing procedure several times.
- Ignition ON, use the scan tool to clear all SIR and PPS DTCs. Refer to
Passenger Presence System Flash Code Procedures. Rezero the PPS, refer to
Passenger Presence System Rezeroing. Verify that DTC 032 does not reset.
- If DTC 032 resets, replace the PPS.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
