Dodge RAM 2002 1500 V6 3.7L Workshop Manual

dodge :: Dodge Truck RAM 1500 Truck 4WD V6-

3.7L VIN K (2002)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Accessory Delay Module > Accessory Delay Relay > Component Information > Description and Operation

Accessory Delay Relay: Description and Operation
ACCESSORY RELAY

The accessory relay works in conjunction with the FCM's power accessory delay features to control the operation of the radio, power windows, washerpump motors, wiper motor and power outlets. The accessory relay is turned ON by the FCM See: Relays and Modules - Powertrain Management/Relaysand Modules - Computers and Control Systems/Body Control Modulethrough the relay's low side control circuit. This circuit is electronically controlledand continuously monitored for malfunctions.

45 seconds

Depending on the ignition switch position, the accessory relay will remain ON or will time out and deactivate. The accessory relay remains ON in theRUN and ACCY ignition switch positions. In the UNLK and OFF positions, the relay will remain energized for and then deactivate. Duringthis time-out period, if a driver or passenger door is opened, the relay will be deenergized immediately. While the ignition switch is in the STARTposition, the relay will also drop out and then resume operation. Accessory relay operation is most noticeable by observing the operation of the radio.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service Bulletins > Customer Interest for Alarm Module: > 08-

016-02 > Sep> 02> Alarm System - Erroneous Horn Chirp/Alarm Siren

Alarm Module: Customer InterestAlarm System - Erroneous Horn Chirp/Alarm Siren

NUMBER: 08-016-02
GROUP: Electrical
DATE: September 2, 2002

SUBJECT:Horn Chirp and Erroneous Alarm

OVERVIEW:This bulletin involves reprogramming the Forward Control Module (FCM)

MODELS:2002 - 2003 (DR) Ram Truck
SYMPTOM/CONDITION:

Two conditions have been identified which could be caused by electronic communication errors between the Forward Controller Module (FCM) andother electronic modules on the vehicle:

The first condition can occur after a vehicle has been turned off and allowed to sit for more than a three minutes. A very brief horn chirp can sometimesbe heard when a door is opened. When the engine is turned off the electronic modules continue to function, or stay awake for two to three minutes aftershut down. After two to three minutes of inactivity the modules deactivate or go into a sleep mode. When a door is opened, the modules are activated orwake up. The brief horn chirp will occur at the time the modules wake up or when the door is opened. This can occur due to a communication error inthe FCM. The second condition involves vehicles NOT equipped with Vehicle Theft Security System (VTSS) exhibiting an alarm with the hornsounding and lights flashing. This can also be caused by communication errors involving the FCM.

Both of these condition have been corrected with software revisions in the FCM. Reprogramming the FCM with the latest software revision (version 5.4)will correct the conditions.
DIAGNOSIS:

If the vehicles exhibit either of the conditions described above, perform the Repair Procedure and reprogram the Front Controller Module (FCM).

EQUIPMENT REQUIRED
REPAIR PROCEDURE:

1. Connect a Battery Charger and set as close to 14 volts charge as possible.

2.
Flash reprogram the Front Controller Module (FCM) using the MDS2 (Mopar Diagnostic System) and the DRBIII(R) (Scan Tool). The FCMsoftware must be version 5.4 or later.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > Customer Interest for Alarm Module: > 08-016-02 > Sep > 02 > Alarm System - Erroneous Horn Chirp/Alarm Siren > Page 16

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

POLICY:Reimbursable within the provisions of the warranty.

TIME ALLOWANCE

FAILURE CODE

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Alarm

Module: > 08-016-02 > Sep > 02 > Alarm System - Erroneous Horn Chirp/Alarm Siren

Alarm Module: All Technical Service BulletinsAlarm System - Erroneous Horn Chirp/Alarm Siren

NUMBER: 08-016-02
GROUP: Electrical
DATE: September 2, 2002

SUBJECT:Horn Chirp and Erroneous Alarm

OVERVIEW:This bulletin involves reprogramming the Forward Control Module (FCM)

MODELS:2002 - 2003 (DR) Ram Truck
SYMPTOM/CONDITION:

Two conditions have been identified which could be caused by electronic communication errors between the Forward Controller Module (FCM) andother electronic modules on the vehicle:

The first condition can occur after a vehicle has been turned off and allowed to sit for more than a three minutes. A very brief horn chirp can sometimesbe heard when a door is opened. When the engine is turned off the electronic modules continue to function, or stay awake for two to three minutes aftershut down. After two to three minutes of inactivity the modules deactivate or go into a sleep mode. When a door is opened, the modules are activated orwake up. The brief horn chirp will occur at the time the modules wake up or when the door is opened. This can occur due to a communication error inthe FCM. The second condition involves vehicles NOT equipped with Vehicle Theft Security System (VTSS) exhibiting an alarm with the hornsounding and lights flashing. This can also be caused by communication errors involving the FCM.

Both of these condition have been corrected with software revisions in the FCM. Reprogramming the FCM with the latest software revision (version 5.4)will correct the conditions.
DIAGNOSIS:

If the vehicles exhibit either of the conditions described above, perform the Repair Procedure and reprogram the Front Controller Module (FCM).

EQUIPMENT REQUIRED
REPAIR PROCEDURE:

1. Connect a Battery Charger and set as close to 14 volts charge as possible.

2.
Flash reprogram the Front Controller Module (FCM) using the MDS2 (Mopar Diagnostic System) and the DRBIII(R) (Scan Tool). The FCMsoftware must be version 5.4 or later.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > All Technical Service Bulletins for Alarm Module: > 08-016-02 > Sep > 02 > Alarm System - Erroneous Horn Chirp/Alarm Siren > Page 22

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

POLICY:Reimbursable within the provisions of the warranty.

TIME ALLOWANCE

FAILURE CODE

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service Bulletins > Page 23

Sentry Key Immobilizer Module

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service Bulletins > Page 24

Alarm Module: Description and Operation
SENTRY KEY IMMOBILIZER MODULE

(SKIM) (RF)

(SKIS)

The Sentry Key Immobilizer Module contains a Radio Frequency transceiver and a central processing unit, which includes theSentry Key Immobilizer System program logic. The SKIS programming enables the SKIM to program and retain in memory the codes ofat least two, but no more than eight electronically coded Sentry Key transponders. The SKIS programming also enables the SKIM to communicateover the Programmable Communication Interface bus network with the Powertrain Control Module , and/or the DRB III scan tool.(PCI) (PCM)

eight millimeters (0.31 inches)

The SKIM transmits and receives RF signals through a tuned antenna enclosed within a molded plastic ring that is integral to the SKIM housing.When the SKIM is properly installed on the steering column, the antenna ring is oriented around the ignition lock cylinder housing. This antennaring must be located within of the Sentry Key in order to ensure proper RF communication between the SKIM andthe Sentry Key transponder.

For added system security each SKIM is programmed with a unique "Secret Key" code and a security code. The SKIM keeps the "Secret Key"code in memory The SKIM also sends the "Secret Key" code to each of the programmed Sentry Key transponders. The security code is used bythe assembly plant to access the SKIS for initialization, or by the dealer technician to access the system for service. The SKIM also stores in itsmemory the Vehicle Identification Number , which it learns through a PCI bus message from the PCM during initialization.(VIN)

The SKIM and the PCM both use software that includes a rolling code algorithm strategy, which helps to reduce the possibility of unauthorizedSKIS disarming. The rolling code algorithm ensures security by preventing an override of the SKIS through the unauthorized substitution of theSKIM or the PCM. However, the use of this strategy also means that replacement of either the SKIM or the PCM units will require a systeminitialization procedure to restore system operation.

When the ignition switch is turned to the ON or START positions, the SKIM transmits an RF signal to excite the Sentry Key transponder. TheSKIM then listens for a return RF signal from the transponder of the Sentry Key that is inserted in the ignition lock cylinder. If the SKIM receivesan RF signal with valid "Secret Key" and transponder identification codes, the SKIM sends a "valid key" message to the PCM over the PCI bus. Ifthe SKIM receives an invalid RF signal or no response, it sends "invalid key" messages to the PCM. The PCM will enable or disable engineoperation based upon the status of the SKIM messages.

three seconds

one second

The SKIM also sends messages to the Instrument Cluster which controls the VTSS indicator LED. The SKIM sends messages to the InstrumentCluster to turn the LED ON for about when the ignition switch is turned to the ON position as a bulb test. After completion of thebulb test, the SKIM sends bus messages to keep the LED OFF for a duration of about . Then the SKIM sends messages to turn theLED ON or OFF based upon the results of the SKIS self-tests. If the VTSS indicator LED comes ON and stays ON after the bulb test, it indicatesthat the SKIM has detected a system malfunction and/or that the SKIS has become inoperative.

If the SKIM detects an invalid key when the ignition switch is turned to the ON position, it sends messages to flash the VTSS indicator LED. TheSKIM can also send messages to flash the LED as an indication to the customer that the SKIS has been placed in it's "Customer Learn"programming mode. See Sentry Key Immobilizer System Transponder Programming in this section for more information on the "Customer Learn"programming mode.

For diagnosis or initialization of the SKIM and the PCM, a DRB III scan tool and the proper Powertrain Diagnostic Procedures manual arerequired.
The SKIM cannot be repaired and, if faulty or damaged, the unit must be replaced.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service Bulletins > Page 25

Alarm Module: Service and Repair
SENTRY KEY IMMOBILIZER MODULE

REMOVAL

1. Disconnect and isolate the battery negative cable.2. Remove the steering column upper and lower shrouds. Refer to Steering, Column, Shroud, Removal.3. Disconnect the steering column wire harness connector from the Sentry Key Immobilizer Module .(SKIM)

Fig. 6 Sentry Key Immobilizer Module (SKIM)

4. Remove the screw securing the SKIM module to the steering column.5. Release the SKIM antenna ring retaining clips from around the ignition switch lock cylinder housing and remove the SKIM.

INSTALLATION

NOTE:

If the SKIM is replaced with a new unit, a DRB III scan tool MUST be used to initialize the new SKIM and to program at least two SentryKey transponders. (Refer to VEHICLE THEFT SECURITY - STANDARD PROCEDURE).

1. Slide the SKIM antenna ring around the ignition switch lock cylinder housing and clip in place.2. Install the retaining screw.3. Connect the steering column wire harness connector to the Sentry Key Immobilizer Module (SKIM).4. Install the steering column upper and lower shrouds. Refer to Steering, Column, Shroud, Installation.5. Connect the battery negative cable.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Page 29

Keyless Entry Module: Description and Operation
REMOTE KEYLESS ENTRY MODULE

(VTSS)

When an RKE lock message is sent to the instrument cluster, the instrument cluster actuates the door locks, the interior lighting is turned OFF, thehorn chirps (if this feature is enabled), the park lamps flash (if this feature is enabled) and, if the vehicle is so equipped, the Vehicle Theft SecuritySystem is armed. When an RKE unlock message is sent to the instrument cluster, the instrument cluster actuates the driver side front door(or all doors if this feature is enabled) unlock, the interior lighting is turned ON and, if the vehicle is so equipped, the VTSS is disarmed.

three minutes

When an RKE panic message is sent to the instrument cluster, the instrument cluster actuates the driver side front door (or all doors if this featureis enabled) unlock, the interior lighting is turned ON and, if the vehicle is so equipped, the VTSS is disarmed. The panic message will also causethe exterior lamps (including the headlights) to flash, and the horn to pulse for about , or until a second panic message is sent to theinstrument cluster. A vehicle speed of about will also cancel the panic event.25.7 kilometers-per-hour (15 miles-per-hour)

Refer to the owner's manual for more information on the features, use and operation of the RKE system.

(RKE)

Whenever the vehicle battery power is interrupted, the Remote Keyless Module Module will retain all vehicle access codes in its memory.When replacing or adding a key fob transmitter (maximum of 4) a DRB III scan tool is required to program the RKE Module to accept the newVehicle Access Code if a customer owned transmitter is not available.
If a functioning transmitter is available, (Refer to POWER LOCKS/KEYLESS ENTRY TRANSMITTER - STANDARD PROCEDURE).

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Page 30

Keyless Entry Module: Testing and Inspection

Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, furtherdetails on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds. Refer tothe proper Body Diagnostic Procedures Manual for testing the Remote Keyless Entry system using a DRB III scan tool.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Page 31

Keyless Entry Module: Service and Repair
REMOVAL

1. Disconnect and isolate the battery negative cable.2. Remove the instrument cluster (Refer to INSTRUMENT CLUSTER - REMOVAL).

Fig. 5 Remote Keyless Entry Module

3. Remove remote keyless entry module from instrument cluster.

INSTALLATION

1. Install remote keyless entry module to instrument cluster.2. Install instrument cluster (Refer to INSTRUMENT CLUSTER - INSTALLATION)3. Connect the battery negative cable.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Winch Relay > Component Information > Description and Operation

Winch Relay: Description and Operation
RELAY PACK

DESCRIPTION

Relay Pack

above 10 volts more than 30 seconds

about 30 minutes

Electrical operation of the control assembly consists of four heavy duty relays, a thermal-switch located on the motor armature brush holder and a LowVoltage Interrupt (LVI) located in the control assembly. The thermal-switch interrupts the power-in function and the LVI affects both the power-in andpower-out functions and must be reset by allowing the charging circuit voltage to rise for . The thermal switch isreset only by allowing the winch motor to cool adequately (). Relay number 1 and 3 control current flow through the field windingsand relay number 2 and 4 supply current to the motor armature.

OPERATION

In the power-out mode, relay number 2 and 3 are energized by the remote control switch. Current flows from the positive battery terminal through relaynumber 3 then through the black motor cable to the number 2 and number 1 field windings. From the black motor cable current then flows throughsolenoid number 2 to the motor armature to ground.

In power-in mode, relay number 1 and 4 are energized. Current again flows from the battery positive cable, but this time current flows through solenoidnumber 1 then through field winding number 1. Current flowing in the reverse direction through the field windings cause the motor to turn in theopposite direction. From the red motor cable current then flows through relay number 4 to the black cable going to the motor armature to ground.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Winch Relay > Component Information > Service and Repair > Winch Relay

Winch Relay: Service and RepairWinch Relay
RELAY

REMOVAL

1. Remove the relay pack (1).

2. Remove the nuts (2 & 3), disconnect the cables and remove the bus straps (4).

Relay #4 shown, all others similar.NOTE:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Winch Relay > Component Information > Service and Repair > Winch Relay > Page 37

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

3. Remove the nuts (1) and disconnect the control wires (2).

4. Slide the relay (1) out of the retaining tab (2) and remove.

INSTALLATION

Relay #4 shown, all others similar.NOTE:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Winch Relay > Component Information > Service and Repair > Winch Relay > Page 38

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

1. Slide the relay (1) into the retaining tab (2).

2. Install the control wires (2) and install the nuts (1).3. Tighten the nuts to 3 N.m (25 in.lbs.)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Winch Relay > Component Information > Service and Repair > Winch Relay > Page 39

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

4. Install the bus straps (4) and connect the cables.5. Install the nuts (2 & 3) and tighten to .9.5 N.m (85 in.lbs.)

6. Install the relay pack (1).

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Winch Relay > Component Information > Service and Repair > Winch Relay > Page 40

Winch Relay: Service and RepairWinch Relay Pack
RELAY PACK

REMOVAL

1. Disconnect and isolate battery negative cable (3).

2. Remove the winch assembly (2).

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Winch Relay > Component Information > Service and Repair > Winch Relay > Page 41

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

3. Remove the nut and disconnect the red battery positive cable (1).

Relay #4 shown, all others similar.NOTE:

4. Remove the control wire nuts (1) and disconnect the control wires (2) from each relay.

INSTALLATION

Relay #4 shown, all others similar.NOTE:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Winch Relay > Component Information > Service and Repair > Winch Relay > Page 42

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

1. Install the control wires (2) to all the relays and install the nuts (1).2. Tighten the nuts to .3 N.m (25 in.lbs.)

3. Install the red battery positive cable (1) and install the switch wire.4. Install the nut and tighten to .10 N.m (85 in.lbs.)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Winch Relay > Component Information > Service and Repair > Winch Relay > Page 43

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

5. Install the relay pack cover (1) and install the three screws (2).

6. Install the winch assembly (2).

7. Connect the battery negative cable (3) and verify winch operation.

> Relays and Modules > Relays and Modules - Body and Frame > Door Module > Component Information > Diagrams

Door Module: Diagrams

Driver Door Module - C1

Driver Door Module - C2

> Relays and Modules > Relays and Modules - Body and Frame > Door Module > Component Information > Diagrams > Page 48

Door Module: Description and Operation
DRIVER DOOR MODULE

(DDM)

A Driver Door Module is used on all models equipped with power locks, power windows, and power mirrors. The DDM houses thefollowing switches:-

- The DDM includes a two-way, momentary, resistor multiplexed switch to control the power lock system.Power Lock Switch

-

Power Mirror Selector Switch

- A three-position rocker switch in the DDM selects the right or left power mirror for adjustment, or turns thepower mirror system Off.

-

Power Mirror Adjustment Switches

- Four momentary, arrowhead shaped, directional switches allow the driver to adjust the selected powermirror in the Up, Down, Right, or Left directions.

-

Power Window Lockout Switch

- A two-way latching, push-button switch in the DDM allows the vehicle operator to lock out the powerwindow switches on each passenger door so that the passenger door power windows may be operated only from the master switches in theDDM.

-

Power Window Switches

- The DDM houses a two-way momentary power window switch for the driver side front door. This switch also hasa second detent in the Down direction and internal circuitry to provide an Auto-Down feature for the driver side front door power window. Inaddition to the power window switch for its own door, the DDM houses individual master switches for each passenger door power window.

(LED s)

The DDM also incorporates several green Light- Emitting Diodes that illuminate the power lock and power window switch paddles, andthe power mirror switch directional buttons to improve switch visibility in dark ambient lighting conditions. The DDM cannot be adjusted orrepaired and, if faulty or damaged, the entire DDM unit must be replaced.

The Driver Door Module (DDM) combines a power lock switch, a driver power window switch with an Auto-down feature, master switches foreach passenger door power window, a power window lockout switch, a power mirror selector switch, and four power mirror adjustment switchesin a single unit. The switches in the DDM can be diagnosed using conventional diagnostic tools and methods.

Power Lock Switch

(IPM)

The DDM power lock switch circuitry is connected in series between ground and the driver door switch mux input of the instrument cluster. Eachpower lock switch position (Lock, Unlock, and Neutral) provides a different resistance value to the instrument cluster input, which allows theinstrument cluster to sense the switch position. Based upon the power lock switch input, the instrument cluster controls the battery and ground feedoutputs to the individual power lock motors to lock or unlock the door latches. The Light-Emitting Diode (LED) in the DDM power lock switch isconnected to battery current through the power window circuit breaker in the Integrated Power Module on a fused ignition switch output(run-acc) circuit so that the switch will be illuminated whenever the ignition switch is in the ON or Accessory positions.

Power Window Switches

The DDM power window switch circuitry is connected to battery current through a circuit breaker in the Integrated Power Module (IPM) on afused ignition switch output (run-acc) circuit so that the power windows will operate whenever the ignition switch is in the ON or Accessorypositions. Each two-way, momentary master passenger power window switch in the DDM provides battery current and ground to the individualpower window switches on each passenger door so that the power window switch controls the battery current and ground feeds to its respectivepower window motor. The DDM switch for the driver side front door power window is labeled "Auto" and includes an auto-down feature. Whenthis switch is depressed to a second momentary detent position and released, the driver door power window is automatically operated through aninternal circuit and relay to its fully lowered position. The Auto-down event is cancelled if the switch paddle is depressed a second time in eitherthe Up or Down direction. When the two position window lockout switch in the DDM is depressed and latched in the lockout position, the batterycurrent feed to each of the individual passenger power window switches is interrupted so that the passenger door power windows can only beoperated from the master switches in the DDM. The window lockout switch also controls the battery current feed for the LED in each passengerpower window switch so that the switch will not be illuminated when it is locked out.

Power Mirror Switches

The DDM power mirror switch circuitry is connected to battery current through a fuse in the IPM on a fused B(+) circuit so that the power mirrorsremain operational regardless of the ignition switch position. A rocker type selector switch has three positions, one to select the right mirror, one toselect the left mirror, and a neutral Off position. After the right or left mirror is selected, one of four directional buttons is depressed to move theselected mirror Up, Down, Right or Left. The DDM power mirror switch circuitry controls the battery current and ground feeds to each of the four(two in each mirror head) power mirror motors. The Light-Emitting Diode (LED) in the DDM power mirror switch is connected to battery currentthrough the power window circuit breaker in the IPM on a fused ignition switch output (run-acc) circuit so that the switch directional buttons willbe illuminated whenever the ignition switch is in the ON or Accessory positions.

> Relays and Modules > Relays and Modules - Body and Frame > Door Module > Component Information > Diagrams > Page 49

Door Module: Testing and Inspection
DRIVER DOOR MODULE

(LED) (DDM)

(IPM)

The Light-Emitting Diode illumination lamps for all of the Driver Door Module power window, power lock, and power mirrorswitches receive battery current through the power window circuit breaker in the Integrated Power Module . If all of the LEDs are inoperative inthe DDM, be certain to diagnose the power window system before replacing the switch unit. (Refer to POWER WINDOWS - DIAGNOSIS ANDTESTING). If only one LED in the DDM is inoperative, replace the faulty DDM. If the driver side front door power window operates in a normalmanner, but the Auto-Down feature is inoperative, replace the faulty DDM. Refer to the appropriate wiring information. The wiring informationincludes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out informationand location views for the various wire harness connectors, splices and grounds.1. Disconnect and isolate the battery negative cable. Remove the DDM from the door trim panel. Disconnect the door wire harness connectors for the

DDM from the DDM connector receptacles.

Fig.2 Driver Door Module Connector C1 Receptacle

> Relays and Modules > Relays and Modules - Body and Frame > Door Module > Component Information > Diagrams > Page 50

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

> Relays and Modules > Relays and Modules - Body and Frame > Door Module > Component Information > Diagrams > Page 51

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

Fig. 3 Driver Door Module Connector C2 Receptacle (Part 1 Of 2)

Fig. 3 Driver Door Module Connector C2 Receptacle (Part 2 Of 2)

2. Test the DDM switch continuity. See the Driver Door Module Switch Tests chart to determine if the continuity is correct for the suspect switches
in each switch position and/or. If not OK, replace the faulty DDM as required.

> Relays and Modules > Relays and Modules - Body and Frame > Door Module > Component Information > Diagrams > Page 52

Door Module: Service and Repair
DRIVER DOOR MODULE

REMOVAL

1. Disconnect and isolate the battery negative cable.

Fig. 4 Driver Door Module

2. Using a trim stick, gently pry the driver door module from the door panel.3. Disconnect the electrical harness connectors from the driver door module.

INSTALLATION

1. Connect electrical harness connectors to the driver door module.2. Position driver door module to door trim panel and press into place.3. Connect battery negative cable.

> Relays and Modules > Relays and Modules - Body and Frame > Heated Mirror Relay > Component Information > Diagrams

Heated Mirror Relay: Diagrams

> Relays and Modules > Relays and Modules - Body and Frame > Heated Mirror Relay > Component Information > Diagrams > Page 56

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

8w-10-2

> Relays and Modules > Relays and Modules - Body and Frame > Heated Mirror Relay > Component Information > Diagrams > Page 57

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

8w-10-3

Heated Mirror Relay

> Relays and Modules > Relays and Modules - Body and Frame > Heated Mirror Relay > Component Information > Diagrams > Page 58

Heated Mirror Relay: Description and Operation
ELECTRICALLY HEATED SYSTEMS

HEATED MIRROR RELAY

A button located on the HVAC control head controls the Heated Mirror Relay, which is located in the IPM. The HVAC control will ground the HeatedMirror Relay Control circuit to energize this relay. The relay control circuit is continuously monitored for certain malfunctions that the HVAC will reportas DTC's.
A button located on the HVAC control head controls the Heated Mirror Relay, which is located in the IPM.

See: Relays and Modules - Powertrain Management/Relays and Modules - Computers and Control Systems/Body Control Module
See: Powertrain Management/Computers and Control Systems/Information Bus

> Relays and Modules > Relays and Modules - Body and Frame > Heated Mirror Relay > Component Information > Diagrams > Page 59

Heated Mirror Relay: Testing and Inspection

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 bothoutside mirror heating grids are inoperative, proceed with the heated mirror system diagnosis as follows. (Refer to Appropriate Wiring Information)See:Diagrams

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANYSTEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECTAND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEMCAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TODISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAGDEPLOYMENT 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 instillment 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 unheatedand 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 availableat 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. See: Power and Ground DistributionWhen the above steps have been completed and both outside mirror heatinggrids are still inoperative, one or more of the following is faulty:

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Page 63

Keyless Entry Module: Description and Operation
REMOTE KEYLESS ENTRY MODULE

(VTSS)

When an RKE lock message is sent to the instrument cluster, the instrument cluster actuates the door locks, the interior lighting is turned OFF, thehorn chirps (if this feature is enabled), the park lamps flash (if this feature is enabled) and, if the vehicle is so equipped, the Vehicle Theft SecuritySystem is armed. When an RKE unlock message is sent to the instrument cluster, the instrument cluster actuates the driver side front door(or all doors if this feature is enabled) unlock, the interior lighting is turned ON and, if the vehicle is so equipped, the VTSS is disarmed.

three minutes

When an RKE panic message is sent to the instrument cluster, the instrument cluster actuates the driver side front door (or all doors if this featureis enabled) unlock, the interior lighting is turned ON and, if the vehicle is so equipped, the VTSS is disarmed. The panic message will also causethe exterior lamps (including the headlights) to flash, and the horn to pulse for about , or until a second panic message is sent to theinstrument cluster. A vehicle speed of about will also cancel the panic event.25.7 kilometers-per-hour (15 miles-per-hour)

Refer to the owner's manual for more information on the features, use and operation of the RKE system.

(RKE)

Whenever the vehicle battery power is interrupted, the Remote Keyless Module Module will retain all vehicle access codes in its memory.When replacing or adding a key fob transmitter (maximum of 4) a DRB III scan tool is required to program the RKE Module to accept the newVehicle Access Code if a customer owned transmitter is not available.
If a functioning transmitter is available, (Refer to POWER LOCKS/KEYLESS ENTRY TRANSMITTER - STANDARD PROCEDURE).

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Page 64

Keyless Entry Module: Testing and Inspection

Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, furtherdetails on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds. Refer tothe proper Body Diagnostic Procedures Manual for testing the Remote Keyless Entry system using a DRB III scan tool.

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Page 65

Keyless Entry Module: Service and Repair
REMOVAL

1. Disconnect and isolate the battery negative cable.2. Remove the instrument cluster (Refer to INSTRUMENT CLUSTER - REMOVAL).

Fig. 5 Remote Keyless Entry Module

3. Remove remote keyless entry module from instrument cluster.

INSTALLATION

1. Install remote keyless entry module to instrument cluster.2. Install instrument cluster (Refer to INSTRUMENT CLUSTER - INSTALLATION)3. Connect the battery negative cable.

> Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module > Component Information > Locations

Seat Heater Control Module: Locations

The heated seat module is located under the drivers front seat cushion, where it is secured to a mounting bracket.

> Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module > Component Information > Locations > Page 69

Seat Heater Interface Module

> Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module > Component Information > Locations > Page 70

Seat Heater Control Module: Description and Operation

Fig. 2 Heated Seat Module

HEATED SEAT MODULE

The heated seat module is also known as the Seat Heat Interface Module. The heated seat module is located under the drivers front seat cushion,where it is secured to a mounting bracket. The heated seat module has a single connector receptacle that allows the module to be connected to allof the required inputs and outputs through the seat wire harness.

(LEDs)

The heated seat module is an electronic microprocessor controlled device designed and programmed to use inputs from the battery, the two heatedseat switches and the two heated seat sensors to operate and control the heated seat elements in both front seats and the two heated seat indicatorlamp Light- Emitting Diodes in each heated seat switch. The heated seat module is also programmed to perform self-diagnosis of certainheated seat system functions and provide feedback of that diagnosis through the heated seat switch indicator lamps.
The heated seat module cannot be repaired. If the heated seat module is damaged or faulty the entire module must be replaced.

When a heated seat switch (Driver or Passenger) is depressed a signal is received by the heated seat module, the module energizes the properindicator LED (Low or High) in the switch by grounding the indicator lamp circuit to indicate that the heated seat system is operating. At the sametime, the heated seat module energizes the selected heated seat sensor circuit and the sensor provides the module with an input indicating thesurface temperature of the selected seat cushion.

36 C (96.8 F) 42 C (107.6 F)

(N-FET)

The Low heat set point is about , and the High heat set point is about . If the seat cushion surface temperatureinput is below the temperature set point for the selected temperature setting, the heated seat module energizes an N-channel Field Effect Transistor within the module which energizes the heated seat elements in the selected seat cushion and back. When the sensor input to the moduleindicates the correct temperature set point has been achieved, the module de-energizes the N-FET which de-energizes the heated seat elements.The heated seat module will continue to cycle the N-FET as needed to maintain the selected temperature set point.

The heated seat module operates on fused battery current received from the integrated power module. Inputs to the module include a resistormultiplexed heated seat switch request circuit for each of the two heated seat switches and the heated seat sensor inputs from the seat cushions ofeach front seat. In response to those inputs the heated seat module controls battery current feeds to the heated seat elements and sensors, andcontrols the ground for the heated seat switch indicator lamps.

If the heated seat module detects a heated seat sensor value input that is out of range or a shorted or open heated seat element circuit, it will notifythe vehicle operator or the repair technician of this condition by flashing the High and/or Low indicator lamps in the affected heated seat switch.Refer to Diagnosis and Testing Heated Seat System in Heated Systems for flashing LED diagnosis and testing procedures. Refer to Diagnosis andTesting
Heated Seat Module in this section for heated seat module diagnosis and testing procedures.

> Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module > Component Information > Locations > Page 71

Seat Heater Control Module: Testing and Inspection

If a heated seat fails to heat and one or both of the indicator lamps on a heated seat switch flash, refer to Diagnosis and Testing Heated Seat System inHeated Seats for the location of flashing LED heated seat system diagnosis and testing procedures. If a heated seat heats but one or both indicator lampsON the heated seat switch fail to operate, test the heated seat switch. Refer to Diagnosis and Testing Heated Seat Switch in Heated Seats for heated seatswitch diagnosis and testing procedures. If the heated seat switch checks OK, proceed as follows.

1. Check the heated seat element (Refer to HEATED SEATS/HEATED SEAT ELEMENT - DIAGNOSIS AND TESTING).2. Check the heated seat sensor (Refer to HEATED SEATS/HEATED SEAT SENSOR - DIAGNOSIS AND TESTING).3. Check the heated seat switch (Refer to HEATED SEATS/DRIVER HEATED SEAT SWITCH - DIAGNOSIS AND TESTING).

Refer to Wiring for the location of complete heated seat system wiring diagrams and connector pin-out information.NOTE:

4. Using a voltmeter, backprobe the appropriate heated seat module connector, do not disconnect. Check for voltage at the appropriate pin cavities.

should be present. If OK go to Step 5, if Not, Repair the open or shorted voltage supply circuit as required.12v

5. Using a ohmmeter, backprobe the appropriate heated seat module connector, do not disconnect. Check for proper continuity to ground on the
ground pin cavities. Continuity should be present. If OK replace the heated seat module with a known good unit and retest system, if Not OK,Repair the open or shorted ground circuit as required.

> Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module > Component Information > Locations > Page 72

Seat Heater Control Module: Service and Repair
REMOVAL

1. Position the driver seat to the full rearward and inclined position.2. Working under the driver front seat, remove the two heated seat module retaining screws. Due to the fact that the retaining screws are installed
with the seat cushion pan removed, a small right angle screwdriver will be required to access and remove the screws.

3. Disconnect the seat wire harness connector from the connector receptacle on the back of the heated seat module. Depress the connector retaining
tab and pull straight apart.

4. Remove the heated seat module from under the front seat.

INSTALLATION

1. Position the heated seat module under the front seat.2. Connect the seat wire harness connector on the connector receptacle on the back of the heated seat module.3. Working under the driver front seat install the heated seat module retaining screws4. Re-position the driver seat.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information > Specifications

Controller Antilock Brake: Specifications

Controller Mounting Screws 53 inch lbs.
RWAL Module Mounting Bolts 11 ft. lbs.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information > Specifications > Page 77

Controller Antilock Brake: Locations

EBC 125 (RWAL)

EBC 325 (ABS)

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information > Diagrams > Diagram Information and Instructions

Controller Antilock Brake: Diagram Information and Instructions

How to Use Wiring Diagrams

DaimlerChrysler Corporation wiring diagrams are designed to provide information regarding the vehicles wiring content. In order to effectively use thewiring diagrams to diagnose and repair DaimlerChrysler Corporation vehicles, it is important to understand all of their features and characteristics.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information >

Diagrams > Diagram Information and Instructions > Page 80

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

General Information (Part 1 of 2)

Diagrams are arranged such that the power (B+) side of the circuit is placed near the top of the page, and the ground (B-) side of the circuit is placednear the bottom of the page (Fig. 1).

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information >

Diagrams > Diagram Information and Instructions > Page 81

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

General Information (Part 2 of 2)

All switches, components, and modules are shown in the at rest position with the doors closed and the key removed from the ignition (Fig. 2).

Components are shown two ways. A solid line around a component indicates that the component is complete. A dashed line around the componentindicates that the component is being shown is not complete. Incomplete components have a reference number to indicate the page where the componentis shown complete.
It is important to realize that no attempt is made on the diagrams to represent components and wiring as they appear on the vehicle. For example, a short

piece of wire is treated the same as a long one. In addition, switches and other components are shown as simply as possible, with regard to function only.

Circuit Functions

Circuit Identification Code Chart

All circuits in the diagrams use an alpha/numeric code to identify the wire and its function. To identify which circuit code applies to a system, refer to theCircuit Identification Code Chart. This chart shows the main circuits only and does not show the secondary codes that may apply to some models.

Circuit Information

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information >

Diagrams > Diagram Information and Instructions > Page 82

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

Wire Code Identification

Wire Color Code Chart

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information >

Diagrams > Diagram Information and Instructions > Page 83

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

Each wire shown in the diagrams contains a code which identifies the main circuit, part of the main circuit, gauge of wire, and color.

Connector, Ground and Splice Information

CAUTION:

Not all connectors are serviced. Some connectors are serviced only with a harness. A typical example might be the Supplemental RestraintSystem connectors. Always check parts availability before attempting a repair.

IDENTIFICATION

Connectors, grounds, and splices are identified as follows:-

In-line connectors located in the engine compartment are series numbersC100

-

In-line connectors located in the Instrument Panel area are series numbers.C200

-

In-line connectors located in the body are series numbers.C300

-

Jumper harness connectors are series numbers.C400

-

Grounds and ground connectors are identified with a "" and follow the same series numbering as the in-line connectors.G

-

Splices are identified with an "" and follow the same series numbering as the in-line connectors.S

­Component connectors are identified by the component name instead of a number. Multiple connectors on a component use a C1, C2, etc.identifier.

Electrostatic Discharge (ESD) Sensitive Devices

Electrostatic Discharge Symbol

All ESD sensitive components are solid state and a symbol is used to indicate this. When handling any component with this symbol comply with thefollowing procedures to reduce the possibility of electrostatic charge build up on the body and inadvertent discharge into the component. If it is notknown whether the part is ESD sensitive, assume that it is.

1. Always touch a known good ground before handling the part. This should be repeated while handling the part and more frequently after sliding
across a seat, sitting down from a standing position, or walking a distance.

2. Avoid touching electrical terminals of the part, unless instructed to do so by a written procedure.3. When using a voltmeter, be sure to connect the ground lead first.4. Do not remove the part from its protective packing until it is time to install the part.5. Before removing the part from its package, ground the package to a known good ground on the vehicle.

Notes, Cautions and Warnings

Additional important information is presented in three ways: Notes, Cautions, and Warnings.

NOTES

are used to help describe how switches or components operate to complete a particular circuit. They are also used to indicate differentconditions that may appear on the vehicle. For example, an up-to and after condition.

are used to indicate information that could prevent making an error that may damage the vehicle.CAUTIONS

WARNINGS

provide information to prevent personal injury and vehicle damage. Below is a list of general warnings that should be followed any time avehicle is being serviced.

WARNING:

- ALWAYS WEAR SAFETY GLASSES FOR EYE PROTECTION.

- USE SAFETY STANDS ANYTIME A PROCEDURE REQUIRES BEING UNDER A VEHICLE.

­BE SURE THAT THE IGNITION SWITCH ALWAYS IS IN THE OFF POSITION, UNLESS THE PROCEDURE REQUIRES IT TOBE ON.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information >

Diagrams > Diagram Information and Instructions > Page 84

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

­SET THE PARKING BRAKE WHEN WORKING ON ANY VEHICLE. AN AUTOMATIC TRANSMISSION SHOULD BE IN PARK.A MANUAL TRANSMISSION SHOULD BE IN NEUTRAL.

- OPERATE THE ENGINE ONLY IN A WELL-VENTILATED AREA.

- KEEP AWAY FROM MOVING PARTS WHEN THE ENGINE IS RUNNING, ESPECIALLY THE FAN AND BELTS.

­TO PREVENT SERIOUS BURNS, AVOID CONTACT WITH HOT PARTS SUCH AS THE RADIATOR, EXHAUST MANIFOLD(S),TAIL PIPE, CATALYTIC CONVERTER, AND MUFFLER.

­DO NOT ALLOW FLAME OR SPARKS NEAR THE BATTERY. GASES ARE ALWAYS PRESENT IN AND AROUND THEBATTERY.

- ALWAYS REMOVE RINGS, WATCHES, LOOSE HANGING JEWELRY, AND LOOSE CLOTHING.

Symbols

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information >

Diagrams > Diagram Information and Instructions > Page 85

RAM 1500 Truck 4WD V6-3.7L VIN K (2002)

Wiring Diagram Symbols

International symbols are used throughout the wiring diagrams. These symbols are consistent with those being used around the world (Fig. 3).

Take Outs

The abbreviation is used in the component location section to indicate a point in which the wiring harness branches out to a component.T/O

Terminology

This is a list of terms and definitions used in the wiring diagrams.

LHD ............................................................................................................................................................................................... Left Hand Drive VehiclesRHD ............................................................................................................................................................................................. Right Hand Drive VehiclesATX ................................................................................................................................................................. Automatic Transmissions-Front Wheel DriveMTX ..................................................................................................................................................................... Manual Transmissions-Front Wheel DriveAT ..................................................................................................................................................................... Automatic Transmissions-Rear Wheel DriveMT ........................................................................................................................................................................ Manual Transmissions-Rear Wheel DriveSOHC ..................................................................................................................................................................................... Single Over Head Cam EngineDOHC ................................................................................................................................................................................... Double Over Head Cam EngineBUX ............................................................................................................................................................................................................. Built-Up-ExportBuilt-Up-Export .................................................................................................................. Vehicles Built For Sale In Markets Other Than North America Except Built-Up-Export ........................................................................................................................................ Vehicles Built For Sale In North America

Section Identification and Information

Section Identification

The wiring diagrams are grouped into individual sections. If a component is most likely found in a particular group, it will be shown complete (all wires,connectors, and pins) within that group. For example, the Auto Shutdown Relay is most likely to be found in Group 30, so it is shown there complete. Itcan, however, be shown partially in another group if it contains some associated wiring.

Connector Replacement
REMOVAL

1. Disconnect battery