RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
Seat Heater: Testing and Inspection
Heated Seat System
The heated 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 Light Emitting Diode (LED) indicator lamps. Refer to the Heated Seat
System Self-Diagnosis table for failure identification. The driver side heated seat switch indicator lamps will flash if a failure occurs in the driver side
heated seat, and the passenger side heated seat switch indicator lamps will flash for a passenger side heated seat failure. If a monitored heated seat system
failure occurs, the switch 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 for the faulty heated seat is depressed in either the Low or High direction. This process will repeat every time the
faulty heated seat switch is actuated until the problem has been corrected.
If the heated seat system failure is identified by flashing heated seat switch indicator lamps, go to the appropriate diagnosis and testing procedure in this
section and confirm the condition, using the step by step procedure. If the monitored failure is confirmed, replace the component. If the monitored failure
is not confirmed, replace the heated seat module with a known good unit and retest the system.
