Section 2

SECTION 2 (Seat Shuts Off In Less Than 5 Seconds)

1. Follow the spread terminal fix procedure listed in Section 5. If this has already been performed and Step 3 in Section 1 has lead you back to this procedure, proceed to Step 2.

2. If CCS is inoperable with a DTC B272C/D code, determine if an over-temp DTC is present (B2729, B2730, B272A, B272B) only on the first heating cycle. If the over-temp code is present after several heating cycles then allow the TED's to rest for 15 minutes before retesting the system.

a. If there is an over-temp DTC present then go to Step 3.

b. If no over-temp DTC is present then go to Step 6.

3. Are any of the TED PIDS reading between 200-400° F (93-204° C) at room temperature conditions (when heat mode has not been on for 5 minutes), or is one TED reading 10° higher than the other TED?

a. If reading excessively hotter than room temperature, for example 200° F (93° C) or so, then go to Step 4.

b. If TED temperatures between Back TED and Cushion TED are 10° different, go to Step 11.

c. If readings are correct, then check for blockage / obstruction of the cushion or the ducting. If blockage is not found, then replace the module and proceed to Step 5. If blockage is found, repair as needed.





4. Check for short to ground or voltage in the thermistor circuit. (As shown on TED connector (C3034 - driver back, C3035 - driver cushion, C3039 - passenger back, or C3040 - passenger cushion) Figure 1.)

a. Check harness side of TED Connector (C3034 - driver back, C3035 - driver cushion, C3039 - passenger back, or C3040 - passenger cushion) for voltage with IGN on; is approximately 5v +/- 1.5v present at Pin 3. If voltage is present, proceed to Step 4b. If not, then unplug the dual climate control seat module (DCCSM) located under the passenger seat, and check if harness side Pin 3 is shorted to ground. If Pin 3 is shorted fix wiring, if not replace DCCSM.

b. Check TED assembly connector, is resistance across Pins 2 and 3 greater than 200 ohms?

(1) If no, then replace TED.

(2) If yes, go to Step 5.

5. If CCS continues to be inoperable with a 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 go to Step 6.

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

6. Are both ambient TED PID readings below 0° F (-18° C) or greater than 400° F (204° C)?

a. If yes, then the Connector C32656 on the DCCSM is not plugged in, or both TEDs (Driver - C3034 and C3035, Passenger - C3039 and C3040) are not plugged in. Plug it in and proceed to Step 12.

b. If not then proceed to Step 7.

7. Is one of the TED PID readings below 0° F (-18° C) or greater than 400° F (204° C)?

a. If yes, then proceed to Step 8.

b. If no, then go to Step 9 in Section 3.

8. Verify the TED is plugged in. (C3034 - Driver Back, C3035 - Driver Cushion, C3039 - Passenger Back, or C3040 - Passenger Cushion)

a. If plugged in, then proceed to Step 9.

b. If not plugged in, then correct and proceed to Step 12.





9. Is the thermistor circuit in the TED open? (Check the connector (C3034 - Driver Back C3035 - Driver Cushion, C3039 - Passenger Back, or C3040 - Passenger Cushion, C3265A - DCCSM). (Figure 2)

a. If it is open, then proceed to Step 10.

b. If it is not open, then proceed to Step 11.

10. Verify the wire harnesses to the thermistor are good (looking for shorts or opens in the harnesses).

a. If the wire harnesses to the thermistor are not good, then repair as needed and proceed to Step 12.

b. If the wire harnesses are good, then proceed to Step 11.

11. Is the resistance on the thermistor circuit at the TED Connector (C3034 - Driver Back, C3035 - Driver Cushion, C3039 - Passenger Back, or C3040 - Passenger Cushion) (between 2.7 K ohms (proper value at 65° F) (18° C) to 1.86 K ohms (proper value at 80° F) (27° C) at ambient (room temperature)?

a. No, then replace the TED that is outside the resistance range specified above, assuming the TED is at room temperature, and proceed to Step 12.

b. Yes, then replace the DCCSM and proceed to Step 12.

12. If CCS continues to be inoperable with a B272C/D code, start a new diagnosis from Step 3 in Section 1, otherwise repower the SRS and finish other repairs as needed and return vehicle to customer.