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Heated
Service Manual
9 pgs63.04 Kb0
Service Manual
20 pgs169.02 Kb0

Dodge Heated Service Manual

DR HEATED SYSTEMS 8G - 1
HEATED SYSTEMS
TABLE OF CONTENTS
page page
HEATED MIRRORS ......................... 1 HEATEDSEAT SYSTEM ..................... 3
HEATED MIRRORS
TABLE OF CONTENTS
page page
HEATED MIRRORS
DESCRIPTION - HEATED MIRROR SYSTEM . . . 1
HEATED MIRRORS
DESCRIPTION - HEATED MIRROR SYSTEM
DIAGNOSIS AND TESTING - HEATED
MIRROR SYSTEM ......................2
lower inboard corner of each outside mirror glass (Fig. 1); or, by the heated mirror switch that is located in the lower left corner of the a/c heater con­trol unit face plate. The heated mirror system helps the vehicle operator maintain outside rear view mir­ror visibility during inclement operating conditions by keeping both outside mirror glasses clear of ice, snow, or fog. The heated mirror system for this vehi­cle includes the following major components:
• The heated mirror switch, including the heated mirror system solid state electronic control logic and timer circuitry, the heated mirror relay and the heated mirror system indicator lamp. All of these components are integral to the a/c heater control unit on the instrument panel.
• The two outside mirror heating grids, which are integral to the power outside mirror units.
Following are general descriptions of the major components in the heated mirror system. See the owner’s manual in the vehicle glove box for more information on the features, use and operation of the heated mirror system.
Fig. 1 HEATED MIRROR- typical
1 - POWER HEATED OUTSIDE REAR VIEW MIRROR 2 - REAR WINDOW DEFOGGER ICON
Electrically heated outside rear view mirrors are an additional factory-installed option on models that are equipped with factory-installed dual power mir­rors. Vehicles with this option can be visually identi­fied by the International Control and Display Symbol icon for rear window defogger, which appears on the
OPERATION - HEATED MIRROR SYSTEM
The solid state electronic control logic and timer circuitry for the heated mirror system receives bat­tery current from a fuse in the Junction Block (JB) only when the ignition switch is in the On or Start positions. After the heated mirror system is turned On, the electronic control logic and timer circuitry will automatically turn the system off after a pro­grammed time interval of about fifteen minutes. After the initial time interval has expired, if the
8G - 2 HEATED MIRRORS DR
HEATED MIRRORS (Continued)
heated mirror switch is depressed and released a sec­ond time during the same ignition cycle, the elec­tronic control logic and timer circuitry will automatically turn the heated mirror system off after a programmed time interval of about five minutes. The heated mirror system will be shut off automati­cally if the ignition switch is turned to the Off or Accessory positions. After the heated mirror system is turned On, it can also be turned off manually by depressing and releasing the heated mirror switch a second time.
When the heated mirror system is turned On, the heated mirror system control logic and timer cir­cuitry energizes the heated mirror system indicator lamp and the heated mirror relay. When energized, the heated mirror relay supplies fused ignition switch output (run/start) current from a fuse in the JB to the outside mirror heating grids located behind the mirror glass of each of the outside rear view mir­rors. When energized, each of the outside mirror heating grids produces enough heat to warm the glass of the outside rear view mirrors.
DIAGNOSIS AND TESTING - HEATED MIRROR SYSTEM
If only one of the outside mirror heating grids is inoperative, perform continuity checks on the circuits and heater grid for that mirror only. If both outside mirror heating grids are inoperative, proceed with the heated mirror system diagnosis as follows. (Refer to Appropriate Wiring Information).
WARNING: ON VEHICLES EQUIPPED WITH AIR­BAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISO­LATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYS­TEM CAPACITOR TO DISCHARGE BEFORE PER­FORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRE­CAUTIONS COULD RESULT IN ACCIDENTAL AIR­BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
The operation of the heated mirror system can be
confirmed in one of the following manners:
1. Turn the ignition switch to the On position. While monitoring the instrument panel voltmeter, momentarily depress and release the heated mirror switch. When the heated mirror system is turned On, a distinct voltmeter needle deflection should be noted.
2. Turn the ignition switch to the On position. Momentarily depress and release the heated mirror switch to turn the heated mirror system On. The heated mirror operation can be checked by feeling the outside rear view mirror glass. A distinct differ­ence in temperature between the unheated and heated mirror glass can be detected within three to four minutes of system operation.
The above checks will confirm system operation. Illumination of the heated mirror system indicator lamp means that there is electrical current available at the heated mirror relay, but does not confirm that the electrical current is reaching the outside mirror heating grids.
If the heated mirror system does not operate, the problem should be isolated in the following manner:
(1) Confirm that the ignition switch is in the On position.
(2) Check the fuses in the Power Distribution Cen­ter (PDC) and in the Junction Block (JB). The fuses must be tight in their receptacles and all electrical connections must be secure.
When the above steps have been completed and both outside mirror heating grids are still inopera­tive, one or more of the following is faulty:
• Heated mirror switch, electronic control logic
and timer circuitry, and heated mirror relay.
• Heated mirror wire harness circuits or connec-
tors.
• Outside mirror heating grid (both mirror grids
would have to be faulty).
If turning On the heated mirror system produces a severe voltmeter deflection or fuse failures, check for a shorted circuit between the output of the heated mirror relay and the outside mirror heating grids.
DR HEATED SEAT SYSTEM 8G - 3
HEATED SEAT SYSTEM
TABLE OF CONTENTS
page page
HEATED SEAT SYSTEM
DIAGNOSIS AND TESTING - HEATED SEAT
SYSTEM .............................4
HEATED SEAT ELEMENT
DIAGNOSIS AND TESTING - HEATED SEAT
ELEMENT ............................6
HEATED SEAT SENSOR
HEATED SEAT SYSTEM
DESCRIPTION
Individually controlled, electrically heated front seats are available as a factory-installed option on some DR models. Vehicles with this option can be visually identified by the leather trim seats and two separate heated seat switches mounted in the lower center of the instrument panel. The heated seat sys­tem allows the front seat driver and passenger to select from two different levels of electrical seat heat­ing, or no seat heating to suit their individual com­fort requirements. The heated seat system for this vehicle includes the following major components, which are described in further detail later in this sec­tion:
• Heated Seat Switches - Two heated seat switches are used per vehicle. One switch is used for each front seat. The switches are mounted in the instrument panel, below the radio (Fig. 1). Each switch also includes two Light-Emitting Diode (LED) indicator lamps and an incandescent back lighting bulb.
• Heated Seat Module - also referred to as the Seat Heat Interface Module (SHIM), this module con­tains the solid state electronic control and diagnostic logic circuitry for the heated seat system. One heated seat module is used per vehicle and is mounted under the drivers front seat cushion (Fig. 1). Refer to the Electronic Control Modules section of the service manual for additional heated seat module informa­tion.
DIAGNOSIS AND TESTING - HEATED SEAT
SENSOR .............................7
HEATED SEAT SWITCH
DIAGNOSIS AND TESTING - HEATED SEAT
SWITCH .............................8
• Heated Seat Elements - Four heated seat ele- ments are used per vehicle. One element is used for each front seat back and one element and sensor assembly is used for each front seat cushion (Fig. 1). The heating elements are integral to the individual front seat and seat back cushions and cannot be removed once installed at the factory. Replacement seat heating elements are available, without having to replace the entire seat cushion or trim cover. Refer to the detailed procedure later in this section.
• Heated Seat Sensors - Two heated seat sen- sors are used per vehicle. One heated seat tempera­ture sensor is used for each front seat cushion. The sensors are integral to the individual front seat cush­ion heating elements (Fig. 1) and cannot be removed once installed at the factory. Replacement seat heat­ing elements with the sensors are available, without having to replace the entire seat cushion or trim cover. Refer to the detailed procedure later in this section.
Following are general descriptions and operations of the major components in the heated seat system. See the owner’s manual in the vehicle glove box for more information on the features, use and operation of the heated seat system. Refer to Wiring for the location of complete heated seat system wiring dia­grams.
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