DTC 052

DTC 052

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) provide an overview of each diagnostic category.



DTC Descriptor
DTC 052
- Heated Seat Ground Fault




Circuit/System Description

The seat heater mat which is a part of the heated seat system is calibrated as a part of the inflatable restraint Passenger Presence System (PPS). If the vehicle is equipped with a front passenger seat heater, the PPS continuously monitors for faults from the heated seat element. If the PPS determines there is a fault in the heated seat element, the PPS will set DTC 052, turn the passenger air bag status indicator to OFF, and notify the sensing and diagnostic module (SDM) of a fault in the PPS through a dedicated serial data circuit. The SDM will then turn the air bag indicator to ON, and set DTC B0081 indicating a problem within the PPS and will disable the deployment of the instrument panel (I/P) module. The heater seat mat along with the PPS is a calibrated system and must be replaced as a complete unit


Conditions for Running the DTC

Ignition voltage is between 9-16 volts.


Conditions for Setting the DTC

The PPS has detected the heated seat element voltage out of range.


Action Taken When the DTC Sets

* The PPS will set a DTC 052, 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 will set DTC B0081.
* 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.



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

If there is a fault in the passenger heated seat element supply circuit, the entire PPS system must be replaced.


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

1. Ignition ON, verify that the passenger heated seat operates properly.

• If the heated seat does not operate, refer to Heated Seat Inoperative (Testing and Inspection).

2. Verify DTC 052 is not set as current.

• If DTC 052 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