Chrysler PT Cruiser 2001 Service Manual Supplement page 2063

PT
HEATED SEAT SYSTEM (Continued)
CONDITION
SEATS DO NOT HEAT AND
NO HEATED SEAT SWITCH
INDICATORS
HEATED SEAT SWITCH
INDICATORS FLASHING
SELF-DIAGNOSTICS - HEATED SEAT SYSTEM
The heated seat system is capable of performing
some self-diagnostics. The following table depicts the
various failure modes which will be reported to the
occupant via flashing of the heated seat switch Light-
Emitting Diode (LED) indicators. Flashing LED indi-
cators on the driver side switch indicate that a fault
exists in the driver side portion of the system and,
FAILURE MODE
Shorted Heating Element
Open Heating Element
NTC Sensor Value Out of Range
DRIVER SEAT HEATER
SWITCH
DESCRIPTION
The heated seat switches are located on the out-
board cushion side shield of the driver and passenger
seats. The two, momentary rocker type switches pro-
vide a resistor multiplexed signal to the appropriate
Heated Seat Module (HSM) through separate hard
wired circuits. Each switch contains two light emit-
ting diodes (LED), one for each High and Low setting
to let the occupant know that the seat heater system
is on.
The heated seat switches and their LED's cannot
be repaired. If either switch is faulty or damaged the
entire switch must be replaced.
2001 PT CRUISER
HEATED SEAT SYSTEM DIAGNOSIS
POSSIBLE CAUSES
1. Faulty circuit breaker.
2. Faulty relay.
3. Faulty module.
1. Faulty sensor.
2. Faulty element.
HEATED SEAT SYSTEM SELF-DIAGNOSTIC TABLE
SWITCH HI LED
CORRECTION
1. Check power seat circuit breaker in Junction
Block (JB). Replace, if required.
2. Refer to Heated Seat Relay for the proper
relay diagnosis and testing procedures. Replace,
if required.
3. Refer to Heated Seat Module for the proper
module diagnosis and testing procedures.
Replace, if required.
1. Refer to Heated Seat Sensor for the proper
heated seat system self-diagnostic routine.
Repair, as required.
2. Refer to Heated Seat Element for the proper
heated seat system self-diagnostic routine.
Repair, as required.
likewise, flashing LED indicators on the passenger
side switch indicate a fault exists in the passenger
side portion of the system. The LED indicators will
flash at a rate of approximately one-half second on,
and one-half second off for a duration of one minute.
This process will repeat each time an attempt is
made to turn the system on with the heated seat
switches until the problem has been corrected.
SWITCH LO LED INDICATOR
INDICATOR
Flashing
Flashing
Off
OPERATION
There are three modes that can be selected with
each of the heated seat switches: Off, Low, and High.
When the front of the switch rocker is depressed, the
High mode is selected and the high mode LED indi-
cator illuminates. Depressing the front of the switch
rocker a second time will return the heated seat to
Off. When the rear of the switch rocker is depressed,
the Low mode is selected and the low mode LED
indicator illuminates. Depressing the rear of the
switch rocker a second time will return the heated
seat to Off. In addition, the heated seats will auto-
matically return to the Off mode anytime the vehicle
ignition switch is turned Off.
HEATED SYSTEMS 8G - 3
Flashing
Off
Flashing