Chrysler PT Cruiser 2001 Service Manual Supplement page 2064

8G - 4 HEATED SYSTEMS
DRIVER SEAT HEATER SWITCH (Continued)
Both switches provide separate resistor multi-
plexed hard wire inputs to the Heated Seat Module
to indicate the selected mode. The Heated Seat Mod-
ule responds to the heated seat switch status mes-
sages by controlling the output to the seat heater
elements of the selected seat. The Low heat position
set point is about 36° C (97° F), and the High heat
position set point is about 41° C (105° F).
DIAGNOSIS & TESTING - DRIVER SEAT
HEATER SWITCH
For circuit description and diagrams, refer to Wir-
ing Diagrams.
Inspect the Heated Seat Switches for apparent dam-
age or sticking/binding and replace as required. Refer
to Heated Seat Switch Removal and Installation.
Inspect the continuity between pin 4 and pin 6 of
the switch. Measure the resistance between the two
pins. Refer to (Fig. 1)and the Heated Seat Switch Pin
Call-Out table. If the readings do not correspond to
those in the Heated Seat Switch Continuity table,
replace the heated seat switch.
Fig. 1 Heated Seat Switch (Rear View)
HEATED SEAT SWITCH PIN CALL-OUT
PIN
1
2
3
4
5
6
2001 PT CRUISER
FUNCTION
LO LED
OPEN
GROUND
IGNITION FEED
HI LED
REQUEST LINE
HEATED SEAT SWITCH CONTINUITY
CONTINUITY SWITCH
BETWEEN POSITION
PIN 4 AND 6
PIN 4 AND 6
PIN 4 AND 6
REMOVAL
(1) Disconnect and isolate the negative battery
cable remote terminal from the remote battery post.
(2) Remove the appropriate seat cushion side
shield. Refer to the Body section of this manual for
the procedure.
(3) Working from the underside of the switch, gen-
tly rock the switch back and forth out of its mounting
location.
INSTALLATION
(1) Gently rock the switch back and forth in to its
mounting location.
(2) Install the appropriate seat cushion side shield.
Refer to the Body section of this manual for the pro-
cedure.
(3) Connect the remote negative battery cable.
HEATED SEAT ELEMENT
DESCRIPTION
The heated seat system includes two seat heating
elements in each front seat, one for the seat cushion
and the other for the seat back. Al models use two
carbon fiber mesh heating elements for each seat
that are connected in parallel with the Heated Seat
Module (HSM). The temperature sensor is a Negative
Temperature Coefficient (NTC) thermistor. One tem-
perature sensor is used for each seat, and it is
located on the seat cushion heating element for all
models.
The seat heating elements are glued into the seat
and seat back cushions. The heated seat elements
and the temperature sensor cannot be adjusted or
repaired and, if faulty or damaged, the seat cush-
ion(s) must be replaced. Refer to the Body section of
this manual for the seat cushion and/or cover trim
service procedures.
READING
OFF 2200 OHMS
LO 415 OHMS
HI 33 OHMS
PT