Pinpoint Test BQ : DTC B272E: Notes

Refer to Climate Controlled Seats for schematic and connector information.

Normal Operation 

The Passenger Climate Controlled Seat Module - 2 (PCSM-2) supplies voltage and ground to both blowers in parallel circuits. If the DCSM detects any of the faults below, the DTC will be set.

• DTC B272E (Driver Ignition Run/Blower Circuit Short to Ground) (this DTC sets for an open or short to voltage) - If either the blower voltage supply or return circuits are open (to both cushion and backrest blowers) or shorted to voltage, the DTC is set and after 4-6 seconds the PCSM-2 disables outputs to the LH rear seat. The DTC will also set if the blower voltage supply or return circuit is open to only one blower when PCSM-2 supply voltage is less than 12 volts.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• Rear Heating Ventilation Air Conditioning (RHVAC) module
• Backrest or cushion Thermo-Electric Device (TED)
• PCSM-2