WIXLIB

BODY CONTROL MODULE 1998 Pontiac Bonneville1997-98 ACCESSORIES & EQUIPMENTGeneral Motors Corp. - Body Control ModuleBuick; LeSabre & RivieraOldsmobile; Aurora, Eighty Eight, LSS & RegencyPontiac; Bonneville* PLEASE READ THIS FIRST *WARNING: Deactivate air bag system before performing any serviceoperation. See AIR BAG RESTRAINT SYSTEM article. DO NOT applyelectrical power to any component on steering column withoutfirst deactivating air bag system. Air bag may deploy.DESCRIPTION & OPERATIONNOTE:Body Control Module (BCM) may also be referred to asMultifunction Alarm, Lock & Lighting (MALL) module.The Multifunction Alarm, Lock and Lighting (MALL) controlsdifferent body systems by obtaining information from various sensorsand switches, then using this information to command the output toeach body system. MALL module provides a set of internal servicediagnostic features to assist technician in troubleshooting electricalshort conditions that may affect MALL. If electrical short occursduring vehicle operation, MALL module stores history codes. Thesecodes can be accessed by entering MALL module diagnostic mode. Afterproviding history codes, MALL module enters Input/Output (I/O) mode.I/O mode enables verification that inputs to MALL module arefunctioning properly.COMPONENT LOCATIONSCOMPONENT LOCATIONS TABLE ComponentLocationMultifunction Alarm, Lock & . Under Right Side OfLighting Module (MALL) (1)Instrument Panel, NearGlove CompartmentInstrument Panel Fuse Block . Attached To LeftFront Door PillarRH Rear Junction Block . Under Right Rear SeatCushion(1) - Multifunction Alarm, Lock and Lighting (MALL) modulemay also be referred to as Body Control Module (BCM). TROUBLE SHOOTING* PLEASE READ THIS FIRST *NOTE:For more information and testing on Multifunction Alarm,Lock and Lighting (MALL) functions and related systems, seeappropriate INSTRUMENT PANEL article.

a & Riviera - 1997Aurora - 1998Riviera - 1998Bonneville - 1997Bonneville - 1998Eighty-Eight, LSS & Regency - 1997Eighty-Eight, LSS & Regency - 1998LeSabre - 1997LeSabre - 1998PRELIMINARY CHECKS1) Check PWR DR LK fuse (15- or 20-amp) and INT LP (20-amp)fuse in RH rear junction block. See WIRING DIAGRAMS.2) Check for poor terminal contacts at component and harnessconnectors.3) Check for proper installation of aftermarket electronicequipment which may affect other systems.4) Check for broken or partially broken wire insideinsulation which could cause system malfunction but check good incontinuity/voltage check.SELF-DIAGNOSTICS SYSTEMENTERING DIAGNOSTIC MODE1) Turn ignition switch to ON position. Depress and holdpower door UNLOCK switch. Cycle headlights 6 times within 20 secondsof depressing UNLOCK switch. Release power door lock UNLOCK switch.2) MALL module will sound stored history codes by audiblebongs. Number of bongs correspond to history code number. FASTEN BELTSindicator flashes with each bong. MALL module will cycle throughhistory codes 3 times, pausing 2 seconds between cycles. If no historycodes exist, MALL will immediately enter input/output mode. Historycodes may be erased by holding power door unlock switch for fourseconds. See MALL HISTORY CODES table for identification anddescription. To exit diagnostic mode, turn ignition switch to OFFposition or accelerate vehicle above 8 MPH.MALL HISTORY CODES TABLE History Code123Affected Circuit. FASTEN BELTS indicator (SBTELL). Battery Protection (PBATT). Courtesy Lights (CTSY) INPUT/OUTPUT (I/O) MODEWhile in Input/Output mode, each input to MALL module can betested by activating/deactivating input device (door lock switch, seatbelt switch, etc.). Each input transition is acknowledged with asingle bong with a simultaneous flash of FASTEN BELTS indicator. SeeMALL INPUTS/OUTPUTS table for inputs and outputs that should bechecked.Keyless Entry (RKE) I/O Mode FeedbackWhen using RKE transmitter, audible feedback is differentwhen activating MALL inputs power door lock switch, transaxle gearselector and keyless entry unlock. Each input is acknowledged with 2bongs with simultaneous flashes of FASTEN BELTS. On Bonneville, no

bongs will occur when shifting into Park position, due to ignition-OFFdoor unlock feature.MALL INPUTS/OUTPUTS TABLE FUNCTION/FEATUREACTIVATE/DEACTIVATEAuxiliary Chime. Park Brake &/OrInstrument Cluster WarningInterior Lights . Interior Light SwitchesDome Light . Dome Light SwitchDoor Latch (Jamb) Switches . Left & Right Front DoorLatch (Jamb) SwitchPower Door Lock . Power Door Lock &Unlock SwitchAutomatic Door Lock & . Gear SelectorDoor LockBattery Protection . Interior Light SwitchLight On Reminder Chime . Headlight SwitchFasten Seat Belts Chime& FASTEN BELTS Indicator . Driver’s Seat Belt SwitchTurn Signal On Reminder Chime . Left & Right Turn SignalTrunk Lid Ajar Light . Trunk Lid Latch Switch SYSTEM TESTS* PLEASE READ THIS FIRST *CAUTION: To prevent damage to terminals, Connector Test Adaptor Kit(J-35616-A) must be used whenever a diagnostic procedurerequires checking or probing terminals. To locate andidentify terminals, see WIRING DIAGRAMS.SYSTEM CHECK1) Check operation of power door lock system. Move left doorlock/window switch to LOCK, then UNLOCK position. Move right doorlock/window switch to LOCK, then UNLOCK position. When each switch isactivated, all doors should lock and remain locked until UNLOCK switchis depressed, which should unlock all doors. If some door lockfunctions do not operate as specified, see appropriate POWER DOORLOCKS article:**POWER DOOR LOCKS - "G" BodyPOWER DOOR LOCKS - "H" BodyIf all power door lock functions are inoperative, seeALL MALL FUNCTIONS INOPERATIVE.2) Check operation of Remote Keyless Entry (RKE) system. SeeREMOTE KEYLESS ENTRY SYSTEM DIAGNOSTIC CHECK table. If some RKEfunctions do not operate as specified, see REMOTE KEYLESS ENTRY SYSTEMarticle:**REMOTE KEYLESS ENTRY SYSTEM - "G" BodyREMOTE KEYLESS ENTRY SYSTEM - "H" BodyIf all RKE functions are inoperative, seeALL MALL FUNCTIONS INOPERATIVE.REMOTE KEYLESS ENTRY DIAGNOSTIC CHECK TABLE

ActionResultDepress Door LOCK Button (1) . All Doors Should LockDepress Door UNLOCK Button Once (1) . Driver’s DoorShould UnlockDepress Door UNLOCK Button . All Doors Should UnlockTwice Within 4 Seconds (1)Depress TRUNK Release Button (1) . Rear Trunk LidShould OpenDepress PANIC Button (1) . Horn Should Sound &Lights Should FlashDepress Any Button (1) . Selected Function ShouldActuateShift Transmission In & . Doors Should Lock WhenOut Of ParkShifted Out Of Park & UnlockWhen Shifted Into Park(1) - Using Remote Keyless Entry (RKE) transmitter. 3) Check operation of interior lighting system. See INTERIORLIGHTING SYSTEM DIAGNOSTIC CHECK table. If some interior lightingfunctions do not operate as specified, see WIRING DIAGRAMS. If allinterior lighting functions are inoperative, seeALL MALL FUNCTIONS INOPERATIVE.INTERIOR LIGHTING SYSTEM DIAGNOSTIC CHECK TABLE ActionResultDepress UNLOCK Button On . Courtesy Lights ShouldRKE TransmitterIlluminate For 40 SecondsWith All Doors Closed, Move . Courtesy Lights ShouldInterior Light SwitchIlluminateTo ON PositionOpen & Close Each Door . Courtesy Light ShouldOne At A TimeIlluminate For 25 Seconds,Then Fade OutWith All Doors Closed, Lift . All Interior Lights ShouldEach Door HandleIlluminate For 25 Seconds,One At A Time (1)Then Fade OutClose All Doors. Turn . Courtesy Light ShouldIgnition Switch To RUN,Illuminate For 25 Seconds,then OFF Position.Then Fade OutRemove KeyDepress Cigarette Lighter(s) . Cigarette Lighter(s)Should Pop Up & HeatingElement Should Be Red HotOpen Glove Box . Glove Box Light ShouldIlluminateOpen Rear Compartment Lid . Rear Compartment LightShould IlluminateMove Headlight Switch To . Engine Compartment LightPark Position. Open EngineShould IlluminateCompartment Lid (2)Open Each Vanity Mirror . Vanity Mirror LightsShould Illuminate(1) - On Bonneville, Eighty Eight, LeSabre, LSS and Regencyonly (with remote keyless entry, illuminated entry andretained accessory power).(2) - Bonneville, LeSabre and Riviera only.

4) Check audible warnings system. See AUDIBLE WARNING SYSTEMDIAGNOSTIC CHECK table. If some audible warning functions do notoperate, see WIRING DIAGRAMS. If all audible warning functions areinoperative, see ALL MALL FUNCTIONS INOPERATIVE.AUDIBLE WARNING SYSTEM DIAGNOSTIC CHECK TABLE ActionResultClose Left Front Door. Turn .Ignition Switch To RUNPosition. Disconnect Seat BeltSeat Belt Chime ShouldSound For 4-8 Seconds.Seat Belt IndicatorShould Illuminate For70 Seconds.Turn Ignition Switch To OFF . Seat Belt Chime Does NotPosition. Buckle Seat Belt.Sound. Seat Belt IndicatorTurn Ignition Switch ToShould Illuminate For 5RUN PositionSeconds (Bulb Check)Turn Ignition Switch To OFF . Key-In-Ignition ChimePosition. With Key InShould SoundIgnition Switch, OpenLeft Front DoorRemove Key From . Key-In-Ignition ChimeIgnition SwitchShould Not SoundTurn Headlight Switch To . Lights On ChimePark PositionShould SoundTurn Headlight Switch To . Lights On ChimeOff PositionShould Not SoundClose Left Front Door. Start . Turn Signal Chime SoundsEngine. Turn Left Or RightAfter Driving 3/4 MileTurn Signal On. Drive Vehicle3/4 MileApply Parking Brake. Drive . Parking Brake On ChimeVehicle About 40 FeetShould Sound ALL MALL FUNCTIONS INOPERATIVE1) Perform body control module diagnostic system check. SeeSYSTEM CHECK. Go to next step.2) Disconnect MALL module Black, 8-pin connector C1. UsingDVOM, check voltage between MALL module connector C1, terminal "H"(Orange wire) and ground. See Fig. 1. If battery voltage exists, go tostep 6). If battery voltage does not exist, go to next step.3) Check PWR DR LK fuse (15- or 20-amp) in RH rear junctionblock. If fuse is open, go to next step. If fuse is not open, go tostep 5).4) Check for short to ground in Orange wire between RH RearJunction Block and MALL module. Repair as necessary. Recheck systemoperation. If circuit is okay, go to SYSTEM CHECK.5) Repair open in power feed to PWR DR LK fuse in RH rearjunction block or in Orange wire between RH Rear Junction Block andMALL module. Recheck system operation.6) Using DVOM, check voltage between MALL module connectorC1, terminals "H" (Orange wire) and "D" (Black wire). If batteryvoltage exists, go to step 8). If battery voltage does not exist, goto next step.7) Repair open in Black wire between MALL module and ground.See WIRING DIAGRAMS. Recheck system operation.8) Check for poor terminal contact at MALL module connectorC1. If terminal contact is okay, replace MALL module. Recheck systemoperation. If terminal contact is not okay, repair as necessary.

Recheck system operation.Fig. 1: Identifying MALL Module Connector C1 TerminalsCourtesy of General Motors Corp.REMOVAL & INSTALLATION

MULTIFUNCTION ALARM, LOCK & LIGHTING (MALL) MODULERemoval & InstallationTurn ignition switch to OFF position. Disconnect negativebattery cable. Locate MALL under right side of instrument panel, nearrear of instrument panel glove box. Remove lower instrument panelsound insulator. Disconnect MALL module harness connectors. RemoveMALL module from vehicle. To install, reverse removal procedure.WIRING DIAGRAMSFig. 2: Body Control Module (BCM) Wiring Diagram (1997 - Aurora &Riviera)

Fig. 3: Body Control Module (BCM) Wiring Diagram (1997 - Bonneville,Eighty Eight, LeSabre, LSS & Regency)

Fig. 4: Body Control Module (BCM) Wiring Diagram (1998 - Aurora &Riviera)

Fig. 5: Body Control Module (BCM) Wiring Diagram (1998 - Bonneville,Eighty Eight, LeSabre, LSS & Regency)

Fig. 6:Of 4)Interior Lights Wiring Diagram (1997 - Aurora & Riviera - 1

Fig. 7:Of 4)Interior Lights Wiring Diagram (1997 - Aurora & Riviera - 2

Fig. 8:3 Of 4)Instrument Panel Illumination Wiring Diagram (1997 - Aurora -

Fig. 9: Instrument Panel Illumination Wiring Diagram (1997 - Riviera- 4 Of 4)

Fig. 10: Illumination/Interior Light Wiring Diagram (1998 - Aurora &Riviera - 1 Of 4)

Fig. 11: Illumination/Interior Light Wiring Diagram (1998 - Aurora &Riviera - 2 Of 4)

Fig. 12:3 Of 4)Illumination/Interior Light Wiring Diagram (1998 - Aurora -