Honda Bmw 5 Service Manual
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Page 411
Fuel lniection 1 Table b. Siemens MS 41.1 ECM pin assignments (continued) Pin lSiqnal 1 Componentlfunction / Notes I - I I 40 1 ground /Crankshaft position sensor /crankshaft position sensor control I - I I 41 1 ground /Camshaft position sensor (CMP) /shielding for CMP sensor I - I I 42 1 ground I~hrottie position sensor (TPS) /TPS ground 43 44 45 46 47 48 49 50 51 ground output output output outout I I I input 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 Camshaft...
Page 412
/Fuel injection Table b. Siemens MS 41.1 ECM pin assignments (continued) 85 86 87 88 CAN-Bus low CAN-Bus high Power supply Diagnostic connector (TxD) inputloutput inpuWoutput input input output Automatic transmission control module (AGS) Automatic transmission control module (AGS) Battery voltage from main relay terminal 87 Diagnostic TxD signal to pin 17 in data link connector
Page 413
- -. Fuel Injection SIEMENS MIS 42.0 AND 43.0 When system faults are detected, a diagnostic trouble code (DTC) is stored in the engine control module (ECM). The MIL also illuminates if an emissions-related fault is detected. When faults arise, or if the malfunction indicator lamp (MIL) is illuminated, begin troubleshooting by connecting BMW ser- vice tester DISplus, MoDiC, GTI or equivalent scan tool. The capabilities of OBD II software has the potential to save hours...
Page 414
Fuel Injection - Ignition: Direct ignition Knock control 4 Primary1 secondary ignition monitoring - Emissions: OBD II compliance Secondary air injection Pre- and post-catalyst oxygen sensors 0 Electrically heated DME-mapped thermostat Misfire detection Evaporative emission control and leak detection Malfunction indicator light (MIL) Performance controls: Dual VANOS control Output of injection signal (TI) for fuel economy gauge Output of engine rpm (TD) for tachometer...
Page 415
130-25 Fuel injection CONTROL RESONANCE. TURBULENCE ----, VALVE CRANUSHAFT SECONDARY AIR MULTI-FUNCTION ROLLING CODE
Page 417
- Fuel Injection ECM relay, testing The engine control module (ECM) relay is energized via the ECM and supplies battery positive (Bc) power to many of the engine management components and subsystems. If this re- lay is faulty, the engine will not start. NOTE- The ECM relay is also referred to as the DME main relay ECM relay powers: ECM Ignition coils * Fuel injection Evaporative leak detection pump Idle air actuator - Camshaft sensors Evaporative emissions valve Hot...
Page 418
130-28 Fuel Injection ECM Relay 4 Check for voltage at terminal 6 (30) at reiay socket If battery voltage is present continue testing. if battery voltage is not present, check fuse 109 (80-amp fusible link) under passenger seat carpet. See 610 Electri- cal Component Locations. - Reinstall relay and turn ignition on. Gain access to back side of reiay socket and check for ground at terminal 4. If ground is present continue testing. If ground is not present, signal from...
Page 419
Fuel Injection A faulty MAF sensor can produce the following problems: Difficult to restart when engine is hot Engine starts then stalls * Engine starts and runs only with accelerator pedal de- pressed 4 Disconnect electrical harness connector from MAF sensor (B). - Turn ignition on and checlc for voltage and ground at connec- tor. There should be ground at pin 1 and battery voltage at pin 3. - If any faults are found, checlc for wiring breaks between MAF sensor and ECM...
Page 420
Fuel Injection Engine coolant temperature (ECT) sensor, testing and replacing 4 The ECT sensor is located below cylinder 6 intake port at the rear of the engine (1). The ECT sensor is a dual temperature sensor. One circuit provides coolant temperature information to the ECM while the other circuit provides coolant temperature information to the instrument cluster. The ECM determines the correct ignition timing and airlfuel mixture required forthe engine temperature by monitoring...