GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2006 🢒 XLR 🢒 DTC 🢒 DTC 064

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 Descriptor

DTC 064 : PPS Communication/ID Performance

Circuit/System Description

The Passenger Presence System (PPS) communicates over a non-class 2 communication circuit to the inflatable restraint sensing and diagnostic module (SDM). When the ignition is turned ON, the PPS will check to make sure the PPS verification ID matches that stored in the inflatable restraint sensing and diagnostic module (SDM). If the SDM cannot communicate with the PPS, the SDM will set DTC B0092 and request the instrument panel cluster (IPC) to turn the AIR BAG indicator ON. If the SDM can communicate to the PPS but the verification ID does not match, the PPS will set DTC 033 and notify the SDM that a fault has occurred, and in turn the SDM will set DTC B0098 and request the instrument panel cluster (IPC) to turn the AIR BAG indicator ON.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC
    • The PPS has lost communications with the SDM.
    • The PPS verification ID does not match the ID that is stored in the SDM.

Action Taken When the DTC Sets
    • The PPS will set a DTC, and then communicate with the SDM.
    • The SDM will set DTC B0092 or B0098.
    • 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 serial data communication.

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

DTC B0098 is an indication that the SDM has received an incorrect PPS verification ID. The SDM will continue to request the verification ID from the PPS for 5 seconds. If the SDM does not receive the correct verification ID from the PPS within 5 seconds, the SDM will set DTC B0098 as current. If DTC B0092 is set, then the SDM cannot communicate with the PPS.

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

SIR Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

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 PPS module
       • The SDM module
       • The PPS wiring harness connector
       • The SDM wiring harness connector

  1. Ignition ON, use the scan tool. Go to the PPS menu, then retrieve the DTCs. Refer to Passenger Presence System Flash Code Procedures . Verify DTC 064 is set.
  2. Ignition OFF, disconnect the PPS module connector.
  3. Remove the SDM connector.
  4. Test the PPS communication circuit between the SDM and the PPS for a short to ground, a high resistance, or an open. Verify short to ground, a high resistance, or an open exist.
    5. ⇒If any of the above conditions are found make the appropriate repair.
  5. Replace the PPS.
  6. Use the scan tool to clear all PPS DTCs. Refer to Passenger Presence System Flash Code Procedures . Rezero the PPS, refer to Passenger Presence System Rezeroing . Verify DTC 064 does not exist.
    7. ⇒If DTC 064 reset replaced the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  SIR/SRS Wiring Repairs
    •  Control Module References for PPS and SDM replacement, setup, and programming