DTC 052

DTC 052

CIRCUIT 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 supply circuit, 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 non class 2 communications circuit. The SDM will then turn the air bag indicator to ON, and set DTC B0092 indicating a problem within the PPS and will suppress 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

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC 052 Heated Seat Ground Fault

CONDITIONS FOR RUNNING THE DTC
Ignition 1 voltage is within the normal operating voltage range.

CONDITIONS FOR SETTING THE DTC
The PPS has detected the heated seat element supply circuit voltage out of range.

ACTION TAKEN WHEN THE DTC SETS
- The PPS will set a DTC 052, then communicate with the SDM via non class 2 circuit.
- The SDM will set DTC B0092.
- 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 class 2 serial data.

CONDITIONS FOR CLEARING THE DTC
- The condition responsible for setting the DTC no longer exists.
- You issue a scan tool CLEAR DTCs command.
- 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.

TEST DESCRIPTION

Steps 1-9:

The number below refer to the step numbers on the diagnostic table.
5. Test the heated seat element supply circuit for voltage.
6. Test the heated seat element supply circuit for a short to ground, a high resistance, or an open.