DTC 064
DTC 064
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.
DTC Descriptor
DTC 064
- Passenger Presence Module Communication/ID Performance
Circuit/System Description
The passenger presence module communicates over a serial data communication circuit to the inflatable restraint sensing and diagnostic module (SDM). When the ignition is turned ON, the passenger presence module will check to make sure the PPS verification ID matches that stored in the SDM. If the SDM cannot communicate with the passenger presence module, the SDM will set a DTC and request the instrument panel cluster (IPC) to illuminate the AIR BAG warning indicator. If the SDM can communicate to the passenger presence module but the verification ID does not match, the passenger presence module will set DTC 064 and notify the SDM that a fault has occurred. The SDM will then set DTC B0081 indicating a problem within the passenger presence module and will suppress the deployment of the passenger instrument panel air bag and then illuminate the AIR BAG warning indicator.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
* The passenger presence module has lost communications with the SDM.
* The passenger presence module verification ID does not match the ID that is stored in the SDM.
Action Taken When the DTC Sets
* The passenger presence module will set a DTC, and then communicate with the SDM.
* The SDM will set DTC B0081.
* The SDM disables the passenger instrument panel air bag deployment loop.
* The passenger presence module will illuminate the passenger air bag status OFF indicator.
* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG warning indicator.
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
The SDM has received an incorrect PPS verification ID. The SDM will continue to request the verification ID from the passenger presence module for 5 seconds. If the SDM does not communicate or receive the correct verification ID from the passenger presence module within 5 seconds, the SDM will set DTC B0081 as current.
Reference Information
Schematic Reference
SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Description and Operation
SIR System Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning)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.
* Passenger presence module
* SDM
* Passenger presence module wiring harness connector
* SDM wiring harness connector
1. Ignition OFF, disconnect the harness connector at the passenger presence module and the SDM.
2. Test for less than 1.0 ohm between the serial data circuit terminal 18 at the passenger presence module harness connector and terminal 60 at the SDM harness connector.
• If greater than the specified range, test the signal circuit for an open/high resistance.
3. If all circuits test normal, test or replace the passenger presence module.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
Control Module References (Programming and Relearning)for passenger presence module or SDM replacement, setup, and programming