Heated Seat Element; Seat Cushion; Seat Back; Heated Seat Sensor - Chrysler 2000 LHS Owner's Manual

8N - 8 ELECTRICALLY HEATED SYSTEMS
DIAGNOSIS AND TESTING (Continued)
HEATED SEAT SWITCH
For circuit description and diagrams, refer to
Group 8W Wiring Diagrams.
Inspect the Heated Seat Switches for apparent
damage or sticking/binding and replace as required.
Refer to Heated Seat Switch Removal and Installa-
tion.
Inspect the continuity between pin 4 and pin 6 of
the switch. Measure the resistance between the two
pins. Refer to (Fig. 4) and the Heated Seat Switch
Pin Call-Out table. If the readings don't correspond
to those in the Heated Seat Switch Continuity table,
replace the heated seat switch.
Fig. 4 Heated Seat Switch (Rear View)
HEATED SEAT SWITCH PIN CALL-OUT
PIN
1
2
3
4
5
6
HEATED SEAT SWITCH CONTINUITY
CONTINUITY
BETWEEN POSITION
PIN 4 AND 6
PIN 4 AND 6
PIN 4 AND 6
FUNCTION
LO LED
OPEN
GROUND
IGNITION FEED
HI LED
REQUEST LINE
SWITCH READING
OFF 2200 OHMS
LO 415 OHMS
HI 33 OHMS
MEMORY HEATED SEAT / MIRROR MODULE
(MHSMM)
Before testing the Memory Heated Seat / Mirror
Module (MHSMM), test the heated seat switches, the
heated seat elements, and the heated seat sensors. If
there are no problems, proceed as follows:
• Replace the current MHSMM with a known
good module, and test the operation of the heated
seats. If OK, discard the faulty MHSMM. If the prob-
lem persists, proceed.
• Test each of the circuits from the heated seat
switch, elements, and sensors to the MHSMM.
Repair any shorts or open circuits as required.

HEATED SEAT ELEMENT

The wire harness connectors for the seat cushion
and seat back heating elements are located under the
seat, near the rear edge of the seat cushion frame.

SEAT CUSHION

(1) Unplug the 4–way heated seat cushion wire
harness connector.
(2) Check the continuity between the two heated
seat driver circuit cavities of the seat cushion cover
half of the heated seat cushion wire harness connec-
tor. If there is continuity, go to Step 3, otherwise
replace the faulty seat cushion cover.
(3) Check the continuity between one of the heated
seat driver circuit cavities of the seat cushion cover
half of the heated seat cushion wire harness connec-
tor and the seat cushion frame. If there isn't any con-
tinuity, go to the Seat Back test, otherwise replace
the faulty seat cushion cover.

SEAT BACK

(1) Unplug the 2–way heated seat back wire har-
ness connector.
(2) Check the continuity between the heated seat
driver circuit cavity and the ground cavity of the seat
back cover half of the heated seat cushion wire har-
ness connector. If there is continuity go to Step 3,
otherwise replace the faulty seat cushion cover.
(3) Check the continuity between the heated seat
driver circuit cavity of the seat back cover half of the
heated seat cushion wire harness connector and the
seat back frame. If there isn't any continuity, test the
heated seat sensor as described in this section, oth-
erwise replace the faulty seat cushion cover.

HEATED SEAT SENSOR

The wire harness connector for the seat cushion
heating element and sensor are located under the
seat, near the rear edge of the seat cushion frame.
For circuit descriptions and diagrams, refer to Group
8W, Wiring Diagrams.
LH