1.1 HFM Sequential Multiport Fuel Injection/Ignition System (HFM-SFI) Engine 104 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Electrical Test Program – Preparation for Test Preliminary work: Diagnosis - Malfunction Memory . 11 Preparation for Test Electrical wiring diagrams, see Electrical Troubleshooting Manual. 1. Ignition: OFF 2. Connect test cable with socket box to engine control module (N3/4) Model 124 according to connection diagram. Model 129 Model 140 Model 202 Model 210 • If installing an engine control module from another vehicle (only Note regarding “Test Connection” column: possible on vehicles without drive authorization system (DAS) stage 2 The numbers indicated in parentheses, for example, O 1.0 (1.23) signify: up to the end of model year 1995), the control module’s memory must 1= Connector 1 on wiring diagram, be erased and the control module must be reactivated, see 11/5. 23= Socket 23 on wiring diagram. ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– b Diagnostic Manual • Engines • 09/00 1.1 HFM-SFI 22/1 1.1 HFM Sequential Multiport Fuel Injection/Ignition System (HFM-SFI) Engine 104 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Electrical Test Program – Preparation for Test Special Tools 102 589 04 63 00 124 589 45 63 00 201 589 00 99 00 201 589 13 21 00 Test cable 82-pin test cable CAN Electrical connecting set Tester 129 589 00 21 00 124 589 09 63 00 140 589 29 63 00 126-pin socket box Ohm decade CAN 140 82-pin test cable Conventional tools, test equipment Description Brand, model, etc. Multimeter 1) Fluke models 23, 83, 85, 87 Engine analyzer 1) Bear DACE (Model 40-960) Sun Master 3 Sun MEA-1500MB 1) Available through the MBUSA Standard Equipment Program. ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– b Diagnostic Manual • Engines • 09/00 1.1 HFM-SFI 22/2 1.1 HFM Sequential Multiport Fuel Injection/Ignition System (HFM-SFI) Engine 104 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Electrical Test Program – Preparation for Test To Avoid Damage to the Ignition System M WARNING! • To avoid damage to the engine control module (N3/10), High Voltage! connect/disconnect the control module connectors only with the ignition: OFF. • Primary connections carry a voltage of up to 400 V. The iron core • Do not connect a test lamp to circuit 1 or 15 of the ignition coil. bracket of the ignition coils must always be connected to vehicle • Do not disconnect or ground any spark plug connector at cranking or ground. idle speed. • Persons with pacemakers should not work on this type of ignition • The high output side of the ignition system must carry at least 2 k] of system. load (spark plug connector). • To avoid damaging the ignition coils during individual testing, do not Using Test Equipment load the coil with more than 28 kV. • Ensure that the engine and ignition are turned off when • If assisting a disabled vehicle and it becomes necessary to perform an connecting/ disconnecting equipment such as voltage signal ignition spark test, perform this test only with a spark plug on one pick–up on respective ignition cables and trigger pick–up on ignition cable. Ensure good ground connection to the spark plug. cylinder 1. See Service Microfiche System (SMS), Repair Instructions, group 15 for further safety precautions. ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– b Diagnostic Manual • Engines • 09/00 1.1 HFM-SFI 22/3 1.1 HFM Sequential Multiport Fuel Injection/Ignition System (HFM-SFI) Engine 104 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Electrical Test Program – Component Locations Connection Diagram - Socket Box Models 124, 202, 210 as well as Model 129, 140 starting Model Year 1996 Figure 1 003 Multimeter 050 Socket box (126-pole) 088 Test cable N3/4 Engine control module (HFM-SFI) P07-5931-57 ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– b Diagnostic Manual • Engines • 09/00 1.1 HFM-SFI 22/4 1.1 HFM Sequential Multiport Fuel Injection/Ignition System (HFM-SFI) Engine 104 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Electrical Test Program – Component Locations Connection Diagram - Socket Box Models 129 and 140 up to Model Year 1995 Figure 2 003 Multimeter 050 Socket box (126-pole) 096 Test cable N3/4 Engine control module (HFM-SFI) P07-5979-57 ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– b Diagnostic Manual • Engines • 09/00 1.1 HFM-SFI 22/5 b ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– 1.1 HFMSequentialMultiportFuelinjection/IgnitionSystem(HFM-SFI) Engine104 27 2625 24 Voltage supply(circuit87M) 23 OS22(afterTWC)insulation(exceptmodel 124) 22OS2 2(afterTWC)signal(exceptmodel124) 21OS2 2(after TWC)ground(exceptmodel124) Notused 20 Notused 19 Startersignal,circuit50 1817 Starter lock-outandbackuplampswitch(transmissionrangeP/Nrecognition)(4- 16 Diagnostic wire 15 TN-signal(enginerpmoutputsignal) 12 –14 CMPsensoroutputsignal(exceptmodel124) 11 OS22(afterTWC)signal(exceptmodel124) Notused 10 OS21(beforeTWC)signal(exceptmodel124) 98 Notused 7 CTPrecognitionfromEA/CC/ISCcontrolmodule 6– Transmissionoverloadprotectionswitch 5– VSSfrom ABScontrolmodule(automatic5-speedtransmissiononly) Fuelconsumptionsignal 41 –3Figure 3 Notused Fuelsafety shut-offfromEA/CC/ISCcontrolmodule Electrical TestProgram–Preparationfor Engine ControlModuleConnector“1”–Interior Layout Diagnostic Manual•Engines •09/00 speed automaticonly) Fuel safetyshut-offfromCC/ISCcontrolmodule(model202,210) Models 129and 140 Models 124,202,210 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– 1.1 HFM-SFI 22/6 P07-5477-33 P07-5936-33 – b ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– 1.1 HFMSequentialMultiportFuelinjection/IgnitionSystem(HFM-SFI) Engine104 HL CAN(+) 4443 CAN(–) 4241 GroundforOS22signal(until7/93,exceptmodel124) 40 Purgeswitchovervalve 39 Transmissionupshiftdelayswitchovervalve 38 OS22(afterTWC)heater(exceptmodel124) 37 Voltagesupply(circuit 30) 36 Voltagesupply(circuit87U) 35 Notused 34 Notused OS21,wireinsulation(until11/94) OS21,signal OS21,ground 3332 Batteryground(W10)(model124) 313029 Electronicsground(W10/1)(model124) 28 OS22(afterTWC)heaterrelaymodule(exceptmodel124,210) Figure 3a OS21heater FPrelaymodule,onmodel210module(K40) Notused Electrical TestProgram–Preparationfor Engine ControlModuleConnector“1”–Interior Layout Diagnostic Manual•Engines •09/00 module) Controller areanetwork(HFM-SFI, RCL[asofMY1996],EA,CC,ETC,Diagnostic module) Controller areanetwork(HFM-SFI, RCL[asofMY1996],EA,CC,ETC,Diagnostic Ground (componentcompartment-right,W16/4)(model202,210) Ground (outputground-rightfootwell,W15)(model140) Ground (moduleboxbracket,W27)(model129) Ground (componentcompartment-right,W16/6)(model202,210) Electronics ground,rightfootwell(W15/1)(models129and140) (continued) Models 129and 140 Models 124,202,210 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– 1.1 HFM-SFI 22/7 P07-5936-33 P07-5477-33 – b ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– 1.1 HFMSequentialMultiportFuelinjection/IgnitionSystem(HFM-SFI) Engine104 222120 Electronicsground(W10/1)(model124) 1918 IgnitioncoilT1/3(terminal1)(Models124, 129,140,202uptoModelYear1995) 16 –17 Notused 15 CMPsensorground Notused 14 Notused 1312 ElectromagneticAIRpump clutchorAIRrelaymodule(K17) 11 Resonanceintakemanifold switchovervalve Injector2 10 Injector5 Notused 98 IgnitioncoilT1/2(terminal1)(Models124,129,140,202uptoModelYear1995) 76 IgnitioncoilT1/1(terminal1)(Models124,129,140,202uptoModelYear1995) 5 CMPsensorsignal 4 Notused 3 Notused 2 MAF sensor signal 1 Notused Figure 4 Injector4 Injector 3 Adjustablecamshafttimingsolenoid Electrical TestProgram–Preparationfor Engine ControlModuleConnector“2”–Compartment Layout Diagnostic Manual•Engines •09/00 Ground (componentcompartment -right,W16/6)(models202,210) Ground (electronics-rightfootwell, W15/1)(models129and140) Ignition coilT1/1(terminal1)(Models