Pinpoint Test J: A Single Climate Controlled Seat Does Not Operate Correctly - Poor Airflow Or Cooling/Heating Performance

Seats

Pinpoint Test J: A Single Climate Controlled Seat Does Not Operate Correctly - Poor Airflow or Cooling/Heating Performance

Normal Operation

Cabin air is drawn through the blower and distributed to each of the Thermo-Electric Device (TED) modules. The TEDs then heat or cool the incoming air depending on the control button settings. The air is then directed into the manifold (part of foam pad) where it is distributed along the surface of the cushion and backrest of the seat. Once activated, the Dual Climate Controlled Seat Module (DCSM) (front seats) or Passenger Climate Controlled Seat Module - 2 (PCSM-2) (rear seats) maintains the heating/cooling modes until deactivated or a fault is detected.

This pinpoint test is intended to diagnose the following:
- Excessive sunload or extreme cabin temperatures
- Incorrectly installed TED
- Airflow blockage
- Disconnected air duct

PINPOINT TEST J: A SINGLE CLIMATE CONTROLLED SEAT DOES NOT OPERATE CORRECTLY - POOR AIRFLOW OR COOLING/HEATING PERFORMANCE

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J1 CHECK FOR DTCs

- Enter the following diagnostic mode on the scan tool: Self Test - DCSM (front seat concern).
- Enter the following diagnostic mode on the scan tool: Self Test - PCSM-2 (rear seat concern).
- Are any DTCs present?

Yes
REFER to Dual Climate Controlled Seat Module (DCSM) DTC Chart (front seat) or Passenger Climate Controlled Seat Module - 2 (PCSM-2) DTC Chart (rear seat). Dual Climate Controlled Seat Module (DCSM) DTC Chart Passenger Climate Controlled Seat Module - 2 (PCSM-2) DTC Chart

No
GO to J2.

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J2 CHECK THE TED COOLING PERFORMANCE

- Check the TEDs cooling performance on the affected seat and verify the system is operating correctly. Refer to Component Test - Thermo-Electric Device (TED) Cooling Performance. Component Tests and General Diagnostics
- Did the TEDs pass the component test and the system is operating correctly?

Yes
Extreme cabin temperatures or excessive sunload on the seat may cause the system to enter recovery mode. Occupant size and weight characteristics can also be a factor. If a concern cannot be found or duplicated, RETURN the vehicle to the customer.

No
DISASSEMBLE the seat as necessary to INSPECT the climate controlled seat components in the seat backrest and cushion (TED inlets and outlets, air ducts, filters and foam pad) for damage, disconnection, restriction or incorrect installation and REPAIR or INSTALL new components as needed. TEST the system for normal operation.

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