Section 4

SECTION 4 (Seat Shuts Off After More Than 40 Seconds)

1. Check the temperature PIDS with a generic scan tool (GST) from the two TEDs on the affected seat when a heating cycle is initiated.

a. If a TED does not increase more than 1 or 2 degrees, then proceed to Step 2.

b. If the TEDs both increase temperature, then proceed to Step 3.

2. Let the TEDs sit with no heating or cooling cycle for 5 minutes. Check the resistance of the TED that does not increase temperature from Step 1.

a. If the resistance of the TED is around 2.5 ohms +/- 10 ohms at room temperature, then proceed to Step 3.

b. If the resistance of the TED is 0 or hundreds of ohms at room temperature then replace the TED, verify the fix and proceed to Step 6.

3. Check for any kinks or obstructions of the ducting from the fan to the TED.

a. If there are kinks, then replace the ducting, if there is an obstruction, then remove if possible otherwise replace the ducting and continue to Step 4.

b. If there are no kinks or obstructions of the ducting, then continue to Step 5.

4. If CCS continues to be inoperable with DTC B272C/D code and





a. Time to failure is different than before, then start new diagnosis from Step 3 in Section 1.

b. Time to failure is not different than before, then continue to Step 5.

c. If CCS is now operable, then repower the SRS and return vehicle to customer.

5. Check for seat back/cushions damage or if the scrim (Figures 9 and 10) has been obstructed or damaged or bunched in the cushion blocking airflow from the TED, or the TED - CCS cushion alignment is incorrect.

a. If the cushion is not a CCS cushion, then replace it with a CCS cushion and proceed to Step 6.

b. If the TED and cushion alignment are incorrect, then correct the alignment, proceed to Step 6.

c. If the cushion or scrim is damaged or bunched or is incorrect, then repair or replace the damaged cushion/scrim and continue to Step 6.

d. If the cushion or scrim is not damaged or bunched and the cushion is a correct cushion for a climate control seat, then replace the TED and continue to Step 6.

6. If CCS continues to be inoperable with a B272C/D code, start a new diagnosis from Step 3 in Section 1 of this TSB; otherwise repower the SRS and return vehicle to customer.