DTC 064
DTC 064
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* 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
- Communication/ID Performance
Diagnostic Fault Information
Circuit/System Description
When the ignition is turned ON, 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 passenger presence system (PPS) module. The PPS module will respond by commanding both the PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. The SDM will transmit a request message to the PPS module to receive the PPS module verification ID. The PPS module will transmit the verification ID to the SDM and the SDM will compare the ID received to data stored in memory. The SDM will also set DTC B0092 to notify the driver that the PPS module has a current malfunction present. When the SDM detects that the PPS module has set any one of the following DTCs 023, 024, 063, 064, or 065, the SDM will disable the instrument panel (I/P) module deployment loop, set DTC B0092, and command the AIR BAG indicator to continuously illuminate.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
* The SDM has detected the PPS module has set a DTC.
* The SDM has lost communication with the PPS module.
Action Taken When the DTC Sets
* The SDM will disable the I/P module deployment loop.
* The SDM commands the AIR BAG indicator ON via serial data communication.
* The PPS module will turn ON the PASSENGER AIR BAG OFF indicator.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 255 malfunction-free ignition cycles have occurred.
Diagnostic Aids
DTC B0092 is an indication that the SDM has lost communication with the PPS module or the PPS module has internal faults/DTCs. The SDM will communicate to request the verification ID from the PPS module for 5 seconds. If the SDM does not receive the verification ID from the PPS module within 5 seconds the SDM will set the DTC as current, illuminate the AIR BAG indicator, and disable the I/P deployment loop.
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
* The PPS module wiring harness connector
* The SDM wiring harness connector
1. Ignition ON, observe the function of the inflatable restraint passenger air bag ON and OFF indicators. The inflatable restraint passenger air bag ON and OFF indicators should illuminate.
^ If the inflatable restraint passenger air bag ON/OFF status indicators do not illuminate refer to Passenger Presence System Indicator Circuit Malfunction. Passenger Presence System Indicator Circuit Malfunction
2. Ignition OFF, disconnect the harness connector at the PPS module.
3. Disconnect the harness connector at the SDM.
4. Test for infinite resistance between the serial data link terminal 18 and ground.
^ If less than the specified range, test the serial data link for a short to ground.
5. Test for less than 1 ohm between the PPS module serial data link terminal 18 and the SDM serial data link terminal 35.
^ If greater than the specified range, test the serial data link for an open/high resistance.
6. Ignition ON, test for less than 1-volt between the PPS module serial data link terminal 18 and the SDM serial data link terminal 35.
^ If greater than the specified range, test the serial data link for a short to voltage.
7. If all circuits test normal, replace the PPS module.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
* SIR/SRS Wiring Repairs