Chrysler 300M 2000 V6 3.5L Workshop Manual

chrysler :: Chrysler 300M V6-3.5L VIN G (2000)

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

Alarm Module: Locations

Sentry Key Immobilizer Module Location

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations > Page 7

Sentry Key Immobilizer Module

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations > Page 8

Alarm Module: Service Precautions

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIR BAGS AND SEAT BELTS/AIR BAGS BEFOREATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE.FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLEPERSONAL INJURY.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations > Page 9

Alarm Module: Description and Operation
SENTRY KEY IMMOBILIZER MODULE (SKIM)

The Sentry Key Immobilizer Module (SKIM) contains a Radio Frequency (RF) transceiver and a central processing unit, which includes theSentry Key Immobilizer System (SKIS) 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 (PCI) bus network with the Powertrain Control Module (PCM), and/or the DRB III scan tool.

Sentry Key Immobilizer Module Location

Sentry Key Immobilizer Module

8 mm (0.31 inches)

The SKIM transmits and receives RF signals through a tuned antenna enclosed within a molded plastic ring formation that is integral to the SKIMhousing. When the SKIM is properly installed on the steering column, the antenna ring is oriented around the circumference of the ignition lockcylinder housing. This antenna ring must be located within of the Sentry Key in order to ensure proper RF communicationbetween the SKIM and the 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 and sends the code over the PCI bus to the PCM, which also keeps this code in its memory. The SKIM also sends the "SecretKey" code to each of the programmed Sentry Key transponders. The security code is used by the assembly plant to access the SKIS forinitialization, or by the dealer technician to access the system for service. The SKIM also stores in its memory the Vehicle Identification Number(VIN), which it learns through a PCI bus message from the PCM during initialization.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations > Page 10

300M V6-3.5L VIN G (2000)

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.

The SKIM also sends messages to the BCM which controls the VTSS indicator LED. The SKIM sends messages to the BCM to turn the LED onfor about three seconds when the ignition switch is turned to the ON position as a bulb test. After completion of the bulb test, the SKIM sends bus

messages to keep the LED off for a duration of about one second. Then the SKIM sends messages to turn the LED on or off based upon the resultsof the SKIS self-tests. If the VTSS indicator LED comes on and stays on after the bulb test, it indicates that the SKIM has detected a systemmalfunction 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 and to generate a single audible chime tone. These functions serve as an indication to the customerthat the SKIS has been placed in its "Customer Learn" programming mode. See Sentry Key Immobilizer System Transponder Programming formore 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 Body Diagnostic Procedures are required. TheSKIM 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 > Adjustments > Programming the Sentry Key Immobilizer Module (SKIM)

Alarm Module: AdjustmentsProgramming the Sentry Key Immobilizer Module (SKIM)
Programming The Sentry Key Immobilizer Module

NOTE

: IF THE PCM AND THE SKIM ARE REPLACED AT THE SAME TIME, PROGRAM THE VIN INTO THE PCM FIRST. ALLVEHICLE KEYS WILL THEN NEED TO BE REPLACED AND PROGRAMMED TO THE NEW SKIM.

1. Turn the ignition ON (transmission in park/ neutral).2. Use the DRB and select "THEFT ALARM", "SKIM" then MISCELLANEOUS.3. Select "SKIM MODULE REPLACEMENT (GASOLINE)"4. Program the vehicle four-digit PIN into the SKIM.5. Select "COUNTRY CODE" and enter the correct country.

NOTE

: BE SURE TO ENTER THE CORRECT COUNTRY CODE. IF THE INCORRECT COUNTRY CODE IS PROGRAMMED INTO SKIM, THE SKIM MUST BE REPLACED.

6. Select "UPDATE VIN" (the SKIM will learn the VIN from the PCM).7. Press "ENTER" to transfer the VIN (the PCM will send the VIN to the SKIM).8. The DRB will ask if you want to transfer the secret key. Select "ENTER" to transfer secret key from the PCM. This will ensure the current
vehicle ignition keys will still operate the SKIS system.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Adjustments > Programming the Sentry Key Immobilizer Module (SKIM) >

Page 13

Alarm Module: AdjustmentsProgramming the Ignition Keys to the SKIM
Programming The Ignition Keys To The Sentry Key Immobilizer Module

1. Turn the ignition ON (transmission in Park/Neutral).2. Use the DRB and select "THEFT ALARM", "SKIM" then "MISCELLANEOUS".3. Select "PROGRAM IGNITION KEYS".4. Enter secured access mode by entering the vehicle four-digit PIN.

NOTE

: A MAXIMUM OF EIGHT KEYS CAN BE LEARNED TO EACH SKIM AT ONE TIME. ONCE A KEY IS LEARNED TO A SKIMIT (THE KEY) CANNOT BE TRANSFERRED TO ANOTHER VEHICLE.
If ignition key programming is unsuccessful, the DRB will display one of the following messages:

Programming Not Attempted - The DRB attempts to read the programmed key status and there are no keys programmed in the SKIM memory.

Programming Key Failed - (Possible Used Key From Wrong Vehicle) - SKIM is unable to program key due to one of the following:-

faulty ignition key transponder

- ignition key is programmed to another vehicle.

8 Keys Already Learned, Programming Not Done - SKIM transponder ID memory is full.1. Obtain ignition keys to be programmed from customer (8 keys maximum)2. Using the DRB, erase all ignition keys by selecting "MISCELLANEOUS" and "ERASE ALL CURRENT IGN. KEYS"3. Program all ignition keys.
Learned Key In Ignition - Ignition key transponder ID is currently programmed in SKIM memory.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Adjustments > Page 14

Alarm Module: Service and Repair

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIR BAGS AND SEAT BELTS/AIR BAGS BEFOREATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE.FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLEPERSONAL INJURY.

REMOVAL

Negative Battery Cable Remote Terminal

1. Open hood and disconnect the negative battery cable remote terminal from the remote battery post.2. Remove knee bolster. Refer to Instrument Panel Systems for Removal and Installation.3. Remove the steering column upper and lower shrouds.4. Disengage the steering column wire harness from the Sentry Key Immobilizer Module (SKIM).5. Remove the one screw securing the SKIM to the bottom of the steering column.

Sentry Key Immobilizer Module Location

6. Slide the SKIM away from the steering column to clear the SKIM antenna ring from around the ignition switch lock cylinder housing .7. Remove the SKIM from the vehicle.

INSTALLATION

1. For installation, reverse the above procedures.2. If the SKIM is replaced with a new unit, a DRB III(R) scan tool and the proper Body Diagnostic Procedures MUST be used to initialize the new
SKIM and to program at least two Sentry Key transponders.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antenna Control Module > Component Information > Locations

Rear Defogger / Antenna Module

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antenna Control Module > Component Information > Locations > Page 18

Antenna Control Module: Service and Repair
REMOVAL

Negative Battery Cable Remote Terminal

1. Open hood and disconnect the negative battery cable remote terminal from the remote battery post.2. Remove right upper quarter trim panel.3. Remove the attaching screw from module.

Rear Window Antenna Module

4. Disconnect wire connectors and radio antenna coaxial cable.5. Remove module from vehicle.

INSTALLATION

For installation, reverse the above procedures.

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

Remote Keyless Entry Module Location

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Page 22

Keyless Entry Module: Service and Repair

Remote Keyless Entry Module Location

Remote Keyless Entry Module/BCM

The Remote Keyless Entry (RKE) Module is located between the junction block and body control module. Refer to Instrument Panel and Systems forJunction Block/BCM Removal and Installation procedures.

REMOVAL

1. With the junction block/BCM removed, separate the two. Refer to Instrument Panel and Systems for BCM Removal and Installation procedures.2. Remove the three retaining screws to RKE Module and separate from BCM.

For installation, reverse the above procedures.INSTALLATION

The RKE transmitters must be reprogrammed to the new RKE module.NOTE:

> Relays and Modules > Relays and Modules - Body and Frame > Door Lock Relay > Component Information > Diagrams

Door Lock Relay: Diagrams

> Relays and Modules > Relays and Modules - Body and Frame > Door Lock Relay > Component Information > Diagrams > Page 27

300M V6-3.5L VIN G (2000)

Junction Block Front

Door Lock Relay

Door Unlock Relay

Driver Door Unlock Relay

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

Remote Keyless Entry Module Location

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Page 31

Keyless Entry Module: Service and Repair

Remote Keyless Entry Module Location

Remote Keyless Entry Module/BCM

The Remote Keyless Entry (RKE) Module is located between the junction block and body control module. Refer to Instrument Panel and Systems forJunction Block/BCM Removal and Installation procedures.

REMOVAL

1. With the junction block/BCM removed, separate the two. Refer to Instrument Panel and Systems for BCM Removal and Installation procedures.2. Remove the three retaining screws to RKE Module and separate from BCM.

For installation, reverse the above procedures.INSTALLATION

The RKE transmitters must be reprogrammed to the new RKE module.NOTE:

> Relays and Modules > Relays and Modules - Body and Frame > Memory Positioning Module > Component Information > Locations

> Relays and Modules > Relays and Modules - Body and Frame > Memory Positioning Module > Component Information > Locations > Page 35

Memory Positioning Module: Diagrams

Memory Heated Seat/Mirror Module - C1

Memory Heated Seat/Mirror Module - C2

> Relays and Modules > Relays and Modules - Body and Frame > Memory Positioning Module > Component Information > Locations > Page 36

300M V6-3.5L VIN G (2000)

Memory Heated Seat/Mirror Module - C3

Memory Heated Seat/Mirror Module - C4

> Relays and Modules > Relays and Modules - Body and Frame > Memory Positioning Module > Component Information > Locations > Page 37

Memory Positioning Module: Service and Repair
REMOVAL

1. Open hood, disconnect and isolate the negative battery cable remote terminal from the remote battery post.

Memory Heated Seat/Mirror Module Location

2. Remove two module attaching screws.3. Disconnect four module connectors.4. Remove module from vehicle.

INSTALLATION

For installation, reverse the above procedures.

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay > Component Information > Locations

Power Door Lock Relay: Locations

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay > Component Information > Locations > Page 41

300M V6-3.5L VIN G (2000)

8W-12-2

8W-12-3

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay > Component Information > Locations > Page 42

Power Door Lock Relay: Diagrams

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay > Component Information > Locations > Page 43

300M V6-3.5L VIN G (2000)

Junction Block (Front)

Door Lock Relay

Door Unlock Relay

Driver Door Unlock Relay

> Relays and Modules > Relays and Modules - Body and Frame > Power Mirror Control Module > Component Information > Locations

> Relays and Modules > Relays and Modules - Body and Frame > Power Mirror Control Module > Component Information > Locations > Page 47

Power Mirror Control Module: Diagrams

Memory Heated Seat/Mirror Module - C1

Memory Heated Seat/Mirror Module - C2

> Relays and Modules > Relays and Modules - Body and Frame > Power Mirror Control Module > Component Information > Locations > Page 48

300M V6-3.5L VIN G (2000)

Memory Heated Seat/Mirror Module - C3

Memory Heated Seat/Mirror Module - C4

> Relays and Modules > Relays and Modules - Body and Frame > Power Mirror Control Module > Component Information > Locations > Page 49

Power Mirror Control Module: Description and Operation
MEMORY HEATED SEAT MIRROR MODULE

EEPROM Refresh FailureFront Riser Sensor Out of Range HighFront Riser Sensor Out of Range LowFront Riser Down Position StuckFront Riser Up Position StuckHorizontal Sensor Out of Range HighHorizontal Forward Position StuckHorizontal Sensor Out of Range LowHorizontal Rearward Position StuckIgnition Status Message Not ReceivedDriver Thermistor Out of Range HighDriver Thermistor Out of Range LowDriver Heated Seat Switch Open/Shorted to GroundDriver Heated Seat Switch Stuck in High StateDriver Heated Seat Switch Stuck in Low StateDriver Mirror Veritcal Sensor Out of Range HighDriver Mirror Vertical Sensor Out of Range LowDriver Mirror Horizontal Sensor Out of Range HighDriver Mirror Horizontal Sensor Out of Range LowDriver Seat Heat Output Shorted to GroundDriver Seat Heat Output OpenMemory Set "S" Position StuckMemory Position #2 StuckMemory Position #1 StuckPRNDL Display Message Not ReceivedRear Riser Down Position StuckRear Riser Up Position StuckRear Riser Sensor Out of Range LowRear Riser Sensor Out of Range HighRecliner Down Position StuckRecliner Up Position StuckRecliner Sensor Out of Range LowRecliner Sensor Out of Range HighPassenger Heated Seat Switch Open/Shorted to GroundPassenger Thermistor Out of Range LowPassenger Thermistor Out of Range HighPassenger Heated Seat Switch Stuck in High StatePassenger Heated Seat Switch Stuck in Low StatePassenger Seat Heat Output Shorted to GroundPassenger Seat Heat Output OpenPassenger Mirror Horizontal Sensor Out of Range LowPassenger Mirror Horizontal Sensor Out of Range HighPassenger Mirror Vertical Sensor Out of Range LowPassenger Mirror Vertical Sensor Out of Range High

> Relays and Modules > Relays and Modules - Body and Frame > Power Mirror Control Module > Component Information > Locations > Page 50

Power Mirror Control Module: Service and Repair
REMOVAL

1. Open hood, disconnect and isolate the negative battery cable remote terminal from the remote battery post.

Memory Heated Seat/Mirror Module Location

2. Remove two module attaching screws.3. Disconnect four module connectors.4. Remove module from vehicle.

INSTALLATION

For installation, reverse the above procedures.

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

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Control Module > Component Information > Locations > Page 54

Power Seat Control Module: Diagrams

Memory Heated Seat/Mirror Module - C1

Memory Heated Seat/Mirror Module - C2

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Control Module > Component Information > Locations > Page 55

300M V6-3.5L VIN G (2000)

Memory Heated Seat/Mirror Module - C3

Memory Heated Seat/Mirror Module - C4

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Control Module > Component Information > Locations > Page 56

Power Seat Control Module: Service and Repair
REMOVAL

1. Open hood, disconnect and isolate the negative battery cable remote terminal from the remote battery post.

Memory Heated Seat/Mirror Module Location

2. Remove two module attaching screws.3. Disconnect four module connectors.4. Remove module from vehicle.

INSTALLATION

For installation, reverse the above procedures.

> Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module > Component Information > Technical Service Bulletins > Customer Interest for Seat Heater Control Module: > 08-26-99 > Aug >

99 > Heated Seat Module/BCM - Erroneous DTC's Set

Seat Heater Control Module: Customer InterestHeated Seat Module/BCM - Erroneous DTC's Set

NUMBER: 08-26-99

GROUP: Electrical

DATE: Aug. 6, 1999

SUBJECT:Erroneous "Heated Seat Switch Missing/Shorted to Ground" DTC

MODELS:1999 - 2000 (LH) LHS/300M

NOTE:

THIS BULLETIN APPLIES TO VEHICLES BUILT AFTER MAY 10, 1999 (MDH 051 0XX).

SYMPTOM/CONDITION:Diagnostic Trouble Codes (DTC's) "Driver and Passenger Heated Seat Switch Missing/Shorted to Ground" may be set when ignition is cycled from ONto OFF. The heated seat switch will lose power prior to the Memory Heated Seat/Mirror Module (MHSMM) receiving an ignition OFF message from theBody Control Module (BCM). It will appear as if the switch is not connected to the MHSMM, setting the faults. This will not occur on every ignitionON to OFF transition.

DIAGNOSIS:The following procedure will assure that if the DTC's are present, they were set due to the above condition, and a true fault condition does not exist:

1. Clear all MHSMM faults.

2.
Turn vehicle ignition ON. Using a DRBIII(R) verify that the heated seat switch voltage is approximately 1 V when the switch is in the "off"position.

3.

If the voltage reading is 0 V, verify that the switch connector is plugged in properly. If so, follow repair procedures outlined in 1998 ChryslerConcorde/Dodge Intrepid/1999 300M/LHS Body Diagnostic Procedure Manual (Publication No.81-270-97229) Memory System Tests 25A and32A.

NOTE:

MHSMM FAULT COUNTERS WILL BE RESET AFTER 20 IGNITION CYCLES.

POLICY: Information Only

> Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Seat Heater Control Module: > 08-26-

99 > Aug > 99 > Heated Seat Module/BCM - Erroneous DTC's Set

Seat Heater Control Module: All Technical Service BulletinsHeated Seat Module/BCM - Erroneous DTC's Set

NUMBER: 08-26-99

GROUP: Electrical

DATE: Aug. 6, 1999

SUBJECT:Erroneous "Heated Seat Switch Missing/Shorted to Ground" DTC

MODELS:1999 - 2000 (LH) LHS/300M

NOTE:

THIS BULLETIN APPLIES TO VEHICLES BUILT AFTER MAY 10, 1999 (MDH 051 0XX).

SYMPTOM/CONDITION:Diagnostic Trouble Codes (DTC's) "Driver and Passenger Heated Seat Switch Missing/Shorted to Ground" may be set when ignition is cycled from ONto OFF. The heated seat switch will lose power prior to the Memory Heated Seat/Mirror Module (MHSMM) receiving an ignition OFF message from theBody Control Module (BCM). It will appear as if the switch is not connected to the MHSMM, setting the faults. This will not occur on every ignitionON to OFF transition.

DIAGNOSIS:The following procedure will assure that if the DTC's are present, they were set due to the above condition, and a true fault condition does not exist:

1. Clear all MHSMM faults.

2.
Turn vehicle ignition ON. Using a DRBIII(R) verify that the heated seat switch voltage is approximately 1 V when the switch is in the "off"position.

3.

If the voltage reading is 0 V, verify that the switch connector is plugged in properly. If so, follow repair procedures outlined in 1998 ChryslerConcorde/Dodge Intrepid/1999 300M/LHS Body Diagnostic Procedure Manual (Publication No.81-270-97229) Memory System Tests 25A and32A.

NOTE:

MHSMM FAULT COUNTERS WILL BE RESET AFTER 20 IGNITION CYCLES.

POLICY: Information Only

> Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module > Component Information > Technical Service Bulletins > Page 70

> Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module > Component Information > Technical Service Bulletins > Page 71

Seat Heater Control Module: Description and Operation
MEMORY HEATED SEAT/MIRROR MODULE (MHSMM)

The Memory Heated Seat and Mirror Module controls the seat heaters, and is mounted unto the bottom of the driver seat

The module controls the seat heaters and is connected to the seat harness by four connectors. There is only one module per memory and heatedsystem. The module cannot be repaired, and if faulty or damaged will have to be replaced.

> Relays and Modules > Relays and Modules - Body and Frame > Seat Heater Control Module > Component Information > Technical Service Bulletins > Page 72

Seat Heater Control Module: Testing and Inspection

(MHSMM)

Before testing the Memory Heated Seat / Mirror Module , test the heated seat switches, the heated seat elements, and the heated seat sensors.If there are no problems, proceed as follows:

­Replace the current MHSMM with a known good module, and test the operation of the heated seats. If OK, discard the faulty MHSMM. If theproblem persists, proceed.

- Test each of the circuits from the heated seat switch, elements, and sensors to the MHSMM. Repair any shorts or open circuits as required.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Description and Operation

ABS Main Relay: Description and Operation

ABS RELAYS (SOLID STATE)

DESCRIPTION

Two internal relays are used to control the antilock brake system. The two relays are the pump/motor relay and the system relay. The pump/motorrelay and the system relay are located in the CAB. If either the pump/motor relay or the system relay is diagnosed as not functioning properly, theCAB must be replaced.

ABS FUSES

DESCRIPTION

(PDC)

The ABS fuses and the ABS pump/motor fuse are located in the Power Distribution Center . Refer to the label on the inside of the PDC coverfor the location of these fuses. The PDC is located on the driver's side of the engine compartment in front of the strut tower.

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

Controller Antilock Brake: Specifications

ABS Integrated Control Unit Mounting Braket Bolts 97 in.lb

Mounting Braket to Frame Bolts 230 in.lb

CAB to HCU Screws 17 in.lb

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information > Specifications > Page 80

Controller Antilock Brake (CAB)

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information > Specifications > Page 81

Controller Anti-lock Brake 25 Way

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Controller Antilock Brake <--> [Electronic Brake Control Module] > Component Information > Specifications > Page 82

Controller Antilock Brake: Description and Operation

INTEGRATED CONTROL UNIT (ICU)

DESCRIPTION

(HCU) (CAB)

(ICU)

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

Specifications > Page 83

300M V6-3.5L VIN G (2000)

The Hydraulic Control Unit and the Controller Antilock Brake used with this antilock brake system are combined (integrated) into oneunit, which is called the Integrated Control Unit . The ICU is located in front of the driver's side front tire, behind the inner fender splash shield.Two different ICU's (HCU and CAB) are used on this vehicle depending on whether or not the vehicle is equipped with traction control. The HCU ona vehicle equipped with traction control has a valve block that is approximately one inch longer than a HCU on a vehicle that is equipped with ABSonly.The ABS-only ICU consists of the following components: the CAB, eight (build/decay) solenoid valves (four inlet valves and four outlet valves),valve block, fluid accumulators, a pump, and an electric motor.The ABS-with traction control ICU consists of the following components: the CAB, eight (build/decay) solenoid valves (four inlet valves and fouroutlet valves), two traction control (ASR) valves, two hydraulic shuttle valves, valve block, fluid accumulators, a pump, and an electric motor.The replaceable components of the ICU are the HCU and the CAB. No attempt should be made to service any individual components of the HCU orCAB.

OPERATION

^ CONTROLLER ANTILOCK BRAKE (CAB)

^ HYDRAULIC CONTROL UNIT (HCU)
For information on the ICU's hydraulic circuits, refer to Antilock Brake System, Description and Operation.

CONTROLLER ANTILOCK BRAKE (CAB)

DESCRIPTION

(CAB)

The Controller Antilock Brake is a microprocessor-based device which monitors the ABS system during normal braking and controls it whenthe vehicle is in an ABS stop. The CAB is mounted to the bottom of the HCU. The CAB uses a 25-way electrical connector on the vehicle wiringharness. The power source for the CAB is through the ignition switch in the RUN or ON position. The CAB is on the PCI bus.

OPERATION

The primary functions of the CAB are to:^

Monitor the antilock brake system for proper operation.

^ Detect wheel locking or wheel slipping tendencies by monitoring the speed of all four wheels of the vehicle.
^ Control fluid modulation to the wheel brakes while the system is in an ABS mode.
^ Store diagnostic information.
^ Provide communication to the DRB scan tool while in diagnostic mode.
^ Illuminate the amber ABS warning lamp.
^ (with traction control only) Illuminate the TRAC ON lamp in the message center on the instrument panel when a traction control event occurs.
^ (with traction control only) Illuminate the TRAC OFF lamp when the amber ABS warning lamp illuminates.

The CAB constantly monitors the antilock brake system for proper operation. If the CAB detects a fault, it will turn on the amber ABS warning lampand disable the antilock braking system. The normal base braking system will remain operational.

If the vehicle is equipped with traction control, the TRAC OFF lamp will illuminate anytime the amber ABS warning lamp illuminates.NOTE:

(DTC)

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

Specifications > Page 84

300M V6-3.5L VIN G (2000)

The CAB continuously monitors the speed of each wheel through the signals generated by the wheel speed sensors to determine if any wheel isbeginning to lock. When a wheel locking tendency is detected, the CAB commands the CAB command coils to actuate. The coils then open and closethe valves in the HCU that modulate brake fluid pressure in some or all of the hydraulic circuits. The CAB continues to control pressure in individualhydraulic circuits until a locking tendency is no longer present.The CAB contains a self-diagnostic program that monitors the antilock brake system for system faults. When a fault is detected, the amber ABSwarning lamp is turned on and the fault Diagnostic Trouble Code is then stored in a diagnostic program memory. These DTC's will remain inthe CAB memory even after the ignition has been turned off. The DTC's can be read and cleared from the CAB memory by a technician using theDRB scan tool. If not cleared with a DRB scan tool, the fault occurrence and DTC will be automatically cleared from the CAB memory after theidentical fault has not been seen during the next 3,600 miles.

CONTROLLER ANTILOCK BRAKE INPUTS

^

wheel speed sensors (four)

^ brake lamp switch
^ ignition switch
^ system and pump voltage
^ ground
^ traction control switch (if equipped)
^ diagnostic communication (PCI)

CONTROLLER ANTILOCK BRAKE OUTPUTS

^

amber ABS warning lamp actuation (via BUS)

^ instrument cluster (MIC) communication (PCI)
^ traction control lamps (if equipped)
^ diagnostic communication (PCI, via BUS)

HYDRAULIC CONTROL UNIT (HCU)

DESCRIPTION

Teves Mark 20 ICU

(HCU)

The Hydraulic Control Unit is mounted to the CAB as part of the ICU. The ICU is located in front of the driver's side front tire, behind theinner fender splash shield. The HCU controls the flow of brake fluid to the brakes using a series of valves and accumulators. A pump/motor ismounted on the HCU to supply build pressure to the brakes during an ABS stop.The HCU on a vehicle equipped with traction control has a valve block that is approximately one inch longer than a HCU on a vehicle that is equippedwith ABS only in order to incorporate the additional valves.

OPERATION

The operation of the HCU's hydraulic circuits can be found in Brakes, Antilock Brake System, Description And Operation, Hydraulic Circuits AndValve Operation.The following topics explain how the different components within the HCU operate.

VALVES AND SOLENOIDS

The valve block contains four inlet valves and four outlet valves. The inlet valves are spring-loaded in the open position and the outlet valves arespring loaded in the closed position during normal braking.The fluid is allowed to flow from the master cylinder to the wheel brakes.During an ABS stop, these valves cycle to maintain the proper slip ratio for each wheel. The inlet valve closes preventing further pressure increase andthe outlet valve opens to provide a path from the wheel brake to the HCU accumulators and pump/motor. This releases (decays) pressure from thewheel brake, thus releasing the wheel from excessive slippage. Once the wheel is no longer slipping, the outlet valve is closed and the inlet valve isopened to reapply (build) pressure.For information on the valves used with the traction control system, refer to Traction Control System, Description and Operation.

BRAKE FLUID ACCUMULATORS

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Specifications > Page 85

300M V6-3.5L VIN G (2000)

Teves Mark 20 ICU

There are two fluid accumulators in the HCU-one for the primary hydraulic circuit and one for the secondary hydraulic circuit. Each hydraulic circuituses a 5 cc accumulator.The fluid accumulators temporarily store brake fluid that is removed from the wheel brakes during an ABS cycle. This stored fluid is used by thepump/ motor to provide build pressure for the brake hydraulic system. When the antilock stop is complete, the accumulators are drained by thepump/motor.

PUMP/MOTOR

Teves Mark 20 ICU

There are two pump assemblies in the HCU-one for the primary hydraulic circuit and one for the secondary hydraulic circuit. Both pumps are drivenby a common electric motor. This DC-type motor is integral to the HCU and is controlled by the CAB.The pump/motor provides the extra amount of brake fluid needed during antilock braking. Brake fluid is released to the accumulators when the outletvalve is opened during an antilock stop. The pump mechanism consists of two opposing pistons operated by an eccentric camshaft. In operation, onepiston draws fluid from the accumulators, and the opposing piston pumps fluid to the master cylinder circuits. When the antilock stop is complete, thepump/motor drains the accumulators.The CAB may turn on the pump/motor when an antilock stop is detected. The pump/motor continues to run during the antilock stop and is turned offafter the stop is complete. Under some conditions, the pump/motor runs to drain the accumulators during the next drive-off.The pump/motor is not a serviceable item; if it requires replacement, the HCU must be replaced.

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Controller Antilock Brake: Service and RepairRemoval and Installation

Before proceeding with this procedure, review Service Precautions.NOTE:

REMOVAL

1. Remove the remote ground cable from the ground stud on the right strut tower.

Correctly Isolated Remote Ground Cable

2. Correctly isolate remote ground cable when servicing vehicle by installing the ground cable insulator on the strut tower ground stud as shown and
installing the nut on the stud. This will prevent accidental grounding of the remote round cable.

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Service and Repair > Removal and Installation > Page 88

300M V6-3.5L VIN G (2000)

3. Using a brake pedal positioning tool such as shown depress brake pedal past its first 1 inch of travel and hold in this position. This will isolate the
master cylinder reservoir from the brake hydraulic system, not allowing the brake fluid to drain out of the reservoir.

4. Remove the bolt and 2 nuts securing the speed control servo to vehicle. Disconnect the wire harness connector from speed control servo. Leaving
the cable attached to the speed control servo, move it aside, out of the way.

Transmission Controller Mounting

5. Remove the screw attaching the washer bottle filler neck to the vehicle. Move neck to the side without loosening the filler tube.6. Remove the nut and bolt holding the transmission controller and bracket to vehicle). Lift transmission controller up and move away from mounting
position.

7. Using Mopar, Brake Parts Cleaner or an equivalent, thoroughly clean all surfaces of the HCU. Also, thoroughly clean all brake tube to HCU
connections.

Brake Tube Fittings

8. Remove the primary and secondary brake tubes coming from the master cylinder, at the HCU, using a crow foot wrench.9. Remove the chassis brake tubes at the HCU, using a crow foot wrench.

Do not apply a 12-volt power source to any terminals of the 25-way HCU connector when disconnected from the CAB.CAUTION:

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Service and Repair > Removal and Installation > Page 89

300M V6-3.5L VIN G (2000)

10. Disconnect the 25-way wiring harness connector from the CAB using the following procedure. Grasp the lock on the 25-way connector, and pull it
up from the connector as far as possible. This will unlock and raise the 25-way connector out of the socket on the CAB.

11. Raise vehicle on jackstands or centered on a hoist.12. Remove the left front tire and wheel assembly.13. Remove fasteners securing the inner fender splash shield in place. Move the splash shield out of the way.14. Remove the 3 bolts attaching the ICU to the mounting bracket.15. Remove the ICU from its mounting bracket Then, remove the ICU from the vehicle by pulling it out around the left side of the mounting bracket,
then through the wheel well.

INSTALLATION

11 Nm (97 inch lbs.).

1. Install the ICU back in the vehicle and attach it to its mounting bracket. Tighten the 3 ICU mounting bolts to 2. Reinstall the inner fender splash shield.3. Reinstall the tire and wheel assembly.4. Lower the vehicle.

Before installing the 25-way connector in the CAB, be sure that the seal is properly installed in the connector.CAUTION:

5. Install the 25-way connector into the socket on the CAB. The connector is installed using the following procedure. Position the 25-way connector
in the socket on the CAB and carefully push it onto CAB as far as it will go. When connector is fully seated into the CAB socket push in theconnector lock as far as it will go. This will pull the 25-way connector into the socket on the CAB and lock it in the installed position.

17 Nm (145 inch lbs.).

6. Install the 4 chassis brake tubes on the HCU. Tighten the chassis brake tubes to 7. Install the primary and secondary brake lines from the master cylinder on the HCU. Tighten the primary and secondary brake tubes to 17 Nm (146
inch lbs.).

8. Reinstall the transmission controller.9. Reattach the washer bottle filler neck to the radiator support.

10. Reinstall the speed control servo to its mounting studs and radiator support.11. Remove brake pedal positioning tool.12. Install the remote ground cable onto the ground stud located on left shock tower. Install the remote ground cable attaching nut and tighten to a

torque of 28 Nm (250 inch lbs.).

The ICU may need to be initialized, using the DRB scan tool, after installation.NOTE:

13. Bleed the base brakes and the ABS brakes hydraulic system.14. Road test vehicle to ensure proper operation of the base and ABS systems.

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Page 90

Controller Antilock Brake: Service and RepairDisassembly and Assembly

REMOVAL

NOTE: (HCU) (CAB)

(ICU)

To replace the Hydraulic Control Unit or the Controller Antilock Brake on this vehicle, the entire Integrated Control Unit needs to be removed from the vehicle. The CAB can then be separated from the HCU. Do not attempt to replace the CAB with the ICU mounted in thevehicle.

1. Remove the ICU from the vehicle.

2. Disconnect the pump/motor wiring harness from the CAB.

CAB Attaching Bolts

3. Remove the 4 bolts attaching the CAB to the HCU.