Charger V8-5.7L (2008)
Seat Heater: Testing and Inspection
Heated Seats
HEATED REAR SEAT SYSTEM
There are two methods of diagnosing the heated rear seat system. The "HEATED SEAT SYSTEM SELF-DIAGNOSIS" is to be performed when the
system is inoperative and one or more of the heated seat switch/module Light Emitting Diode (LED) indicator lamps are flashing. The "HEATED SEAT
SYSTEM BASE DIAGNOSIS" is to be performed when the system is inoperative and no LEDs are flashing or lighting when the switch/module buttons
are pressed.
HEATED SEAT SYSTEM SELF-DIAGNOSIS
NOTE: Before testing the individual components in the heated rear seat system, check the vehicles battery open-circuit voltage and charging
system performance. If the vehicles electrical system is defective or weak it may not be suppling sufficient energy to operate the heated rear seat
system.
The heated rear seat system is capable of performing some self-diagnostics. The following table depicts the various monitored failures which will be
reported to the vehicle operator or technician by flashing the individual heated seat switch/module Light Emitting Diode (LED) indicator lamps. Heated
Rear Seat System Self-Diagnosis Table for failure identification. The left heated seat switch/module indicator lamps will flash if a failure occurs in the
left rear heated seat, and the right heated seat switch/module indicator lamps will flash for a right rear heated seat failure. If a monitored heated rear seat
system failure occurs, the switch/module indicator lamps will flash at a pulse rate of about one-half second on, followed by about one-half second off for
a duration of about one minute after the switch/module for the inoperative heated rear seat is depressed in either the Low or High direction. This process
will repeat every time the inoperative heated seat switch/module is actuated until the problem has been corrected.
For complete circuit diagrams, refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and
connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness
connectors, splices and grounds.
Diagnostic logic is built into the heated seat switch/module to help locate the problem by the most efficient means possible. Anytime a problem is
suspected, locate the diagnosis and testing procedure for the component in question and follow the steps until the specific problem is located and
resolved. Once the problem is thought to be corrected, verify correct system operation. If the heated rear seat system is functioning correctly return the
vehicle to service.
If a problem could not be verified such as not finding anything wrong when following the diagnostic procedure, this is a good indication that a
INTERMITTENT problem may be present. You must then attempt to find the intermittent problem, such as moving the heating element within the seat
while testing continuity or wiggling the wire harness's/electrical connectors under the seat while testing continuity. Always, eliminate all other potential
problems before attempting to replace the heated seat switch/module.
HEATED SEAT SYSTEM BASE DIAGNOSIS
NOTE: Before testing the individual components in the heated rear seat system, check the vehicles battery open-circuit voltage and charging
system performance. If the vehicles electrical system is defective or weak it may not be suppling sufficient energy to operate the heated rear seat
system.
For complete circuit diagrams, refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and
connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness
connectors, splices and grounds.
PRELIMINARY TEST
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If a single LED indicator lamp for one heated seat switch/module does not operate and the heated rear seat elements heat, replace the switch with
the inoperative indicator lamp See: Seat Heater Switch/Service and Repair/Heated Seat Switch - Removal.
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If both LED indicator lamps for a heated seat switch/module operate, but the heated rear seat elements do not heat, See: Heated Seat Element -
Diagnosis and Testing to check the suspect heated rear seat elements. If the elements test OK, proceed to STEP 1.
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If both rear seats fail to heat and the indicator lamps on the heated seat switch/modules for both seats fail to operate, test the heated rear seat fuses
in the Integrated Power Module (IPM). If the heated rear seat fuses check OK, go to STEP 1.
LEFT REAR HEATED SEAT SWITCH/MODULE
