Body Control Computer - Introduction: Overview

IDENTIFICATION

Application	Body
Breeze, Cirrus & Stratus	JA
Caravan, Town & Country, & Voyager	NS
Concorde, Intrepid, LHS & 300M	LH
Dakota	AN
Durango	DN
Pickup	BR
Ram Van & Ram Wagon	AB
Sebring Convertible	JX

BODY IDENTIFICATION

Modules (1)	Body
Air Bag System Control Module (ABSCM)	All Models
Anti-Lock Brake Controller	JA, JX, LH & NS
Automatic Temperature Control (ATC) (2)	LH
Body Control Module (BCM)	JA, JX, LH & NS
Central Timer Module (CTM)	AB, AN, BR & DN
Compass/Mini-Trip Computer	AN, DN, JA, JX & NS
Mechanical Instrument Cluster (MIC)	All Models
Overhead Travel Information System (OTIS)	LH
Remote Keyless Entry (RKE)	BR, JA, JX, LH & NS
Smart Key Immobilizer Module	JX
Transmission Control Module (TCM)	JA, JX, LH & NS
Vehicle Information Center (VIC)	NS
Vehicle Theft Security System (VTSS)	BR, JA, JX, LH & NS
(1) Modules or systems that communicate over CCD bus. (2) For Automatic Temperature Control (ATC) system and A/C-heater system diagnostic information, see appropriate article in AUTOMATIC A/C-HEATER SYSTEMS in AIR CONDITIONING.

(1)	Modules or systems that communicate over CCD bus.

(2)	For Automatic Temperature Control (ATC) system and A/C-heater system diagnostic information, see appropriate article in AUTOMATIC A/C-HEATER SYSTEMS in AIR CONDITIONING.

MODULE APPLICATIONS

DESCRIPTION

The body control computer system consists of a combination of modules that communicate over the Chrysler Collision Detection (CCD) bus system on all models except Concorde and Intrepid. Concorde and Intrepid communicate over the Programmable Communication Interface (PCI) bus system. Through the CCD or PCI bus, information related to the operation of vehicle components and circuits are relayed to the appropriate system module(s). This reduces the complexity of vehicle wiring and size of wiring harness.

Body control computer systems covered in BODY CONTROL COMPUTER TESTS article are as follows

Chime system
Compass/Mini-Trip Computer (CMTC)
Door ajar system
Exterior lighting
Instrument cluster
Interior lighting
Intermittent wipers
Mechanical Instrument Cluster (MIC)
Memory Heated Seat/Mirror System (MHSMS)
Power door locks
Power windows
Remote keyless entry
Sentry Key Immobilizer System (SKIS)
Vehicle Information System (VIC)
Vehicle Theft Security System (VTSS).

Body control computer fault messages are accessed through 16-pin Data Link Connector (DLC) using Chrysler's Diagnostic Readout Box (DRB) scan tool or generic scan tool. DLC is located on left side of steering column, above brake pedal.

Note. Self-diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRB) scan tool. A generic scan tool may not be capable of performing all necessary test functions.

The Body Control Module (BCM) is part of junction block located under left side of instrument panel on JA, JX and NS models. On LH models, BCM is mounted to junction block located behind left end cap of instrument panel. BCM stores odometer information for electronic instrument cluster display and provides power and ground for a variety of systems.

The BCM on all models except Concorde, Intrepid, LHS and 300M is the only module that has the capability of providing both "bias" and "termination" on the CCD bus system. See CCD BUS SYSTEM. Systems are monitored by BCM through voltage drops.

Vehicle may be equipped with either a premium or base model BCM. Base body control computer is used on vehicles with a mechanical instrument cluster.

On JA body, premium BCM is used on vehicles with a trunk ajar switch. On LH body, premium BCM can be identified by the presence of either the Automatic Temperature Control (ATC) system, Overhead Travel Information System (OTIS), or both.

CONNECTOR IDENTIFICATION

Note. For terminal identification of body control system connectors, use appropriate illustration(s). See CONNECTOR IDENTIFICATION DIRECTORY . Connector terminal numbers may be molded into connectors. If connector terminal identification differs from that shown in figure, use wire colors to ensure correct circuit is being tested. See WIRING DIAGRAMS .

Connector		See Fig.
ABS Controller (JA, JX, LH & NS Bodies)		(Scheme 12)
Air Bag Control Module (JA, JX & NS Bodies)		(Scheme 13)
Air Bag Control Module (AB, AN, BR, DN & LH Bodies)		(Scheme 14)
ATC Module (LH Body)		(Scheme 15)
ATC Sun Sensor/VTSS Indicator (LH Body)		(Scheme 16)
Body Control Module 10-Pin (JA & JX Bodies)		(Scheme 17)
Body Control Module 14-Pin (JA & JX Bodies)		(Scheme 18)
Body Control Module 20-Pin (JA & JX Bodies)		(Scheme 19)
Body Control Module 22-Pin (JA & JX Bodies)		(Scheme 20)
Body Control Module (LH Body)
"C1" 14-Pin (Gray)		(Scheme 21)
"C2" 24-Pin (Black)		(Scheme 22)
"C3" 12-Pin (Bone)		(Scheme 23)
"C4" 16-Pin (Blue)		(Scheme 24)
Body Control Module (NS Body)		(Scheme 25)
Central Timer Module "A" (AN, BR & DN Bodies)		(Scheme 26)
Central Timer Module "B" (AN, BR & DN Bodies)		(Scheme 27)
Central Timer Module (AB Body)
"C1" (Green)		(Scheme 26)
"C2" (White)		(Scheme 27)
Compass Mini-Trip Computer (AN & DN Bodies)		(Scheme 28)
Compass Mini-Trip Computer (JA & JX Bodies)		(Scheme 29)
Compass Mini-Trip Computer (NS Body)		(Scheme 30)
Courtesy Light Relay (JA & JX Bodies)		(Scheme 31)
Data Link (DLC)		(Scheme 32)
Door Lock Motor/Ajar Switch (DN & LH Bodies)		(Scheme 33)
Electrochromic Mirror (NS Body)		(Scheme 34)
Fuel Pump
LH Body		(Scheme 35)
NS Body		(Scheme 36)
Fuel Pump Module (JA & JX Bodies)		(Scheme 37)
Headlight Switch
Caravan & Voyager		(Scheme 38)
8-Pin, NS Body		(Scheme 39)
LH & NS Bodies		(Scheme 40)
AB Body		(Scheme 41)
Headliner (LH Body)		(Scheme 42)
HVAC Control Module (Blue - NS Body)		(Scheme 43)
Ignition Switch (LH Body)		(Scheme 45)
Ignition Switch (NS Body)		(Scheme 46)
Information Center (NS Body)		(Scheme 40)
Ignition Switch (JA & JX Bodies)		(Scheme 44)
Instrument Cluster
JA & JX Bodies		(Scheme 47)
All Except JA, JX & NS Models		(Scheme 48)
NS Body		(Scheme 49)
Junction Block 6-Pin (JA & JX Bodies)		(Scheme 50)
Junction Block (Typical - NS Body Shown)		(Scheme 51)
Junction Block Internal (NS Body)		(Scheme 52)
Key-In Ignition
AN & DN Bodies		(Scheme 53)
BR Body		(Scheme 54)
Memory Heated Seat/Mirror Module (LH Body)
12-Pin Connector		(Scheme 55)
16-Pin Connector		(Scheme 56)
26-Pin Connector		(Scheme 57)
Memory Mirror (LH Body)		(Scheme 58)
Multifunction Switch 10-Pin (JA & JX Bodies)		(Scheme 59)
Multifunction Switch (AN, BR & DN Bodies)		(Scheme 60)
Multifunction Switch 7-Pin (JA, JX & LH Bodies)		(Scheme 61)
Multifunction Switch (NS Body)		(Scheme 62)
OTIS Module (LH Body)		(Scheme 63)
Parking Light (NS Body)		(Scheme 64)
Power Door Lock Module (AB Body)		(Scheme 65)
Power Door Lock Switch
AB Body		(Scheme 66)
AN & BR Body		(Scheme 68)
Power Door Lock/Window Switch (DN Body)		(Scheme 67)
Power Seat Switch (LH Body)		(Scheme 69)
Power Seat Memory Switch (LH Body)		(Scheme 30)
Power Seat Memory Heater Switch (LH Body)		(Scheme 30)
Power Top Switch		(Scheme 70)
Powertrain Control Module
AB, AN & DN Bodies		(Scheme 71)
Except AB, AN & DN Bodies		(Scheme 72)
Remote Keyless Entry (RKE) Module (NS Body)		(Scheme 30)
Relay (Typical)		(Scheme 73)
Relay Center (AN & DN Bodies)		(Scheme 74)
Seat Belt Module (BR & JX Body)		(Scheme 75)
Sentry Key Immobilizer Module (JA, JX & LH Bodies)		(Scheme 76)
Steering Column (AB Body)		(Scheme 77)
Transmission Control Module Connector		(Scheme 78)
Wiper Motor
AN & DN Bodies		(Scheme 79)
BR Body		(Scheme 80)
JA & JX Bodies		(Scheme 81)
LH Body		(Scheme 82)
NS Body		(Scheme 83)