B2425
DTC B2425 OR B2430
CIRCUIT DESCRIPTION
The driver seat module (DSM) controls the voltage supply and the ground circuits to the seat heater elements. When a heated seat function is commanded active, the seat module will switch battery voltage to the heater element supply circuits, and ground is provided through low side drive control circuits. During heated seat operation both the seat back and cushion heater elements are supplied battery voltage. The seat module grounds the appropriate control circuits for back only or back and cushion heating modes, and opens or closes the active control circuits as necessary in order to maintain the desired seat temperature.
DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- DTC B2425 Driver Seat Heater Circuit
- DTC B2430 Passenger Seat Heater Circuit
CONDITIONS FOR RUNNING THE DTC
- Battery voltage to the seat module must be within 7-16 volts.
- Heated seat operation is attempted.
CONDITIONS FOR SETTING THE DTC
- One of the low side drive control circuits is shorted to voltage or ground.
- One of the heater element voltage supply circuits is shorted to voltage or ground.
ACTION TAKEN WHEN THE DTC SETS
The seat module will disable heated seat operation.
CONDITIONS FOR CLEARING THE DTC
- The DTC will be stored as a history code when the fault is no longer present.
- A history DTC will be cleared after completing 100 consecutive ignition cycles.
DIAGNOSTIC AIDS
If the DTC is only found in history, the fault may be intermittent.
Refer to Testing for Intermittent Conditions and Poor Connections. Testing for Intermittent Conditions and Poor Connections
TEST
