Expedition 4WD V8-5.4L VIN 5 (2006)
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.
