Pinpoint Test D: Climate Seats Assembly - Thermal Electric Device (Ted) And Ducting Diagnostics

1. Uncouple connector C3HS03B from the seat climate control module
2. Check the resistance of the climate seats TED sensor circuits at connector C3HS03B

• For right-side seat cushion TED sensor circuits, check resistance at pins 2 and 3
• For right-side seat backrest TED sensor circuits, check resistance at pins 4 and 5
• For left-side seat cushion TED sensor circuits, check resistance at pins 7 and 8
• For left-side seat backrest TED sensor circuits, check resistance at pins 9 and 10

Is the resistance between 0.9 and 1.1 kilo-ohms? (Note: these values are based on an ambient temperature of 22°C/72°F)

• Yes  : No circuit faults present. No further action
• No  : GO to  D2.

1. Locate the appropriate seat backrest/seat cushion climate assembly connector
2. Disconnect connector
3. Check the integrity of connector terminals for bent terminals, backed-out or badly crimped wires. Rectify as required
4. Check the resistance of the climate seats TED sensor circuits at the climate assembly connector, pins 5 and 8 (Green and Green wires)

Is the resistance between 0.9 and 1.1 kilo-ohms? (Note: these values are based on an ambient temperature of 22°C/72°F)

• Yes  : GO to  D3.
• No  : Replace the seat climate assembly

1. Check the TED supply circuits at the climate assembly connector, pins 1 and 3 (Blue and Yellow wires) for open circuit faults

Is an open-circuit fault present?

• Yes  : Replace the seat climate assembly
• No  : No internal circuit faults present. Check for circuit faults in wiring harness between seat climate control module and climate seat assembly and replace as required. If no harness faults are found, GO to  D4.

1. Check that the ducting is securely attached to the blower and thermal electric device
2. Check the ducting for holes, cuts or tears

Is the ducting undamaged and securely attached to the blower and thermal electric device?

• Yes  : GO to  D5.
• No  : Replace the seat climate assembly

1. Check for blockages or restrictions at the thermal electric device exhaust vent

Are blockages or restrictions present?

• Yes  : Rectify as required
• No  : GO to  D6.

1. Check for blockages or restrictions at the blower air intake
2. Check that the blower fan movement is not restricted

Are there any air intake blockages or restrictions to the blower fan movement?

• Yes  : Rectify as required
• No  : No further action