Pinpoint Test Z : DTC B272A: Notes
Refer to Climate Controlled Seats for schematic and connector information.
Normal Operation and Fault Conditions
The SCME monitors seat cushion temperature while it supplies voltage and ground to both blower motors. The SCME also supplies a variable voltage signal to control the blower speed. Cabin air enters the blower through a filter attached to the blower motor housing. Heated or cooled air exits the blower motor and flows through a duct to the foam pad.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B272A | Passenger Cushion Over-Temp Detected | If the passenger seat cushion blower motor temperature exceeds 70 ° C (158 ° F) in cool mode or 85 ° C (185 ° F) in heat mode for more than 4 seconds, the SCME shuts down the passenger seat system and sets this DTC. |
Possible Causes
- Wiring, terminals or connectors
- Restricted blower motor filter
- Crushed or restricted cushion foam pad
- Cushion blower motor
- SCME