DTC 034
DTC 034
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptor
DTC 034
- Wet Seat Fault
Circuit/System Description
The inflatable restraint Passenger Presence System (PPS) has several flexible conductive metal strips placed underneath the seat cushion trim. These sensor strips transmit and receive a low-level electric field. If the seat is saturated with liquid, the PPS will detect a low resistance value between these sensor strips. If this occurs, allow seat to dry, it may take up to 48 hours for the seat to completely dry. Check if fault returns. If the PPS determines there is a wet seat condition the PPS will communicate to the sensing and diagnostic module (SDM) through a dedicated serial data circuit that a PPS fault is present. 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 SDM that a PPS fault is present. The SDM will then turn the AIR BAG indicator ON, and set DTC B0092 indicating a problem within the PPS and will disable the deployment of the instrument panel (I/P) module. In some conditions DTC 056 will set along with DTC 034. The wet seat fault should be diagnosed first.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
* Seat or seat trim/foam is saturated with liquid.
* Low resistance values between sensor strips.
Action Taken When the DTC Sets
* The PPS will set a DTC 034, and then communicate with the SDM via dedicated serial data 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 disables the I/P module deployment loop.
* The PPS will illuminate the passenger air bag status OFF indicator.
* The SDM commands the AIR BAG indicator ON via serial data circuit.
Conditions for Clearing the DTC
* The condition for setting the DTC no longer exists.
* A history DTC will clear once 255 malfunction-free ignition cycles have occurred.
Diagnostic Aids
This fault indicates that the seat or seat trim/foam is saturated with liquid. If this DTC sets, verify the wet seat condition, let dry and see if fault returns. If DTC 056 is set along with DTC 034, diagnose the wet seat fault first.
Reference Information
Schematic Reference
SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
SIR System Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
Important: If DTC resets after rezeroing, it may be necessary to perform this rezeroing procedure several times.
1. Remove the PPS and passenger seat bottom cushion assembly and allow to air dry approximately 48 hours.
2. Reinstall the PPS and seat bottom cushion assembly.
3. Ignition ON, clear all SIR and PPS DTCs. Rezero the PPS, refer to Passenger Presence System Rezeroing (Programming and Relearning).
4. Verify DTC 034 is not set as current, refer to Passenger Presence System Flash Code Procedures (Passenger Presence System Flash Code Procedures).
• If DTC 034 is set as current, replace the PPS.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* SIR/SRS Wiring Repairs (Component Tests and General Diagnostics)
* Control Module References (Programming and Relearning) for SDM and PPS replacement, setup, and programming