Description
(1) engine ECU Delphi DCM 3.5
- "a" 53-way black connector (CH)
- "b" 53-way brown connector (CMI)
- "c" 48-way grey connector (CME)
Make: DELPHI
Role
The engine management ECU manages the entire injection system
The engine ECU software incorporates the following functions
- Check functionalities of injection and pollution control
- Driving improvement strategies
- The coded immobiliser function ADC2R
- Emergency strategies
- Fan unit and warning lamp operating management (*)
- The diagnostic with memorisation of failures
- The cruise control and speed limiter function (*)
Note(*) according to specification
The engine management ECU electrically controls the following components
- Diesel injectors
- Fuel flow regulator
- Control electrovalve for the EGR heat exchanger by-pass (egr)
- Cold connection double air mixer electrovalve (hot air flap inactive)
- Variable geometry turbocharger electrovalve
- Pre and post-heating control unit
- Diesel fuel heater
- "Blow-by" heaters
- Diesel fuel additive pump
- Exhaust gas recycling valve
- The vacuum in the brake servo
The atmospheric pressure sensor cannot be separated from the engine ECU
The engine management ECU has 2 power stages which are able to supply the very high control current necessary for the operation of the diesel injectors
Electrical features
Engine ECU DELPHI DCM 3.5 (3 connectors)
- 53-way black connector (CH)
- 53-way brown connector (CMI)
- 48-way grey connector (CME)
| channel No. | allocation of channels of connector |
|---|---|
| 1 | engine ECU power supply input |
| 2 | engine ECU supply input |
| 3 | earth |
| 4 | earth |
| 5 | engine ECU supply input |
| 6 | engine ECU power supply input |
| 7 | additional heating control signal 1 |
| 8 | control signal: diesel additive pump for the particle emission filter |
| 9 | not used |
| 10 | engine running information |
| 11 | power relay control output |
| 12 | cooling fan control output 2 |
| 13 | cooling fan control output 1 |
| 14 | not used |
| 15 | not used |
| 16 | additional heating control signal 2 |
| 17 | not used |
| 18 | engine ECU power supply input |
| 19 | remote-controlled wake-up line (RCD) |
| 20 | air and fuel supply: brake vacuum sensor (brake servo) |
| 21 | refrigerant pressure sensor supply |
| 22 | brake pedal secondary switch signal input |
| 23 | not used |
| 24 | not used |
| 25 | not used |
| 26 | cooling fan diagnostic information |
| 27 | not used |
| 28 | main relay control output |
| 29 | not used |
| 30 | engine ECU power supply input |
| 31 | not used |
| 32 | signal: braking servo vacuum |
| 33 | aircon fluid pressure sensor signal input |
| 34 | accelerator pedal position sensor signal input 2 |
| 35 | accelerator pedal position sensor signal input 1 |
| 36 | accelerator pedal tight spot switch signal input |
| 37 | not used |
| 38 | CAN High Hybrid |
| 39 | not used |
| 40 | Intersystem CAN High |
| 41 | not used |
| 42 | not used |
| 43 | not used |
| 44 | earth: accelerator pedal position sensor 2 |
| 45 | refrigerant pressure sensor earth |
| 46 | accelerator pedal sensor supply |
| 47 | earth: accelerator pedal position sensor 1 |
| 48 | not used |
| 49 | not used |
| 50 | CAN Low Hybrid |
| 51 | not used |
| 52 | Intersystem CAN Low |
| 53 | earth |
| channel No. | allocation of channels of connector |
|---|---|
| 1 | not used |
| 2 | control output: double air mixer electrovalve |
| 3 | EGR all-or-nothing electrovalve control output |
| 4 | variable geometry turbocharger electrovalve control output |
| 5 | power supply + battery of the oil vapour heater and diesel fuel heater |
| 6 | control +: engine (Exhaust gas recycling valve (egr)) |
| 7 | not used |
| 8 | signal input: inlet air temperature and pressure sensor |
| 9 | not used |
| 10 | not used |
| 11 | not used |
| 12 | not used |
| 13 | diesel fuel high pressure sensor supply |
| 14 | air and fuel supply: double air mixer position copy sensor and variable geometry turbocharger position copy sensor |
| 15 | air and fuel supply: Exhaust gas recycling valve (egr) |
| 16 | power supply + EGR valve by-pass position copy sensor |
| 17 | power supply + battery of the following components - proportional oxygen sensor - double air mixer electrovalve - air flowmeter electrovalve - EGR all-or-nothing electrovalve |
| 18 | control - of the EGR valve motor |
| 19 | not used |
| 20 | diesel fuel high pressure sensor signal input |
| 21 | not used |
| 22 | signal input - negative: proportional oxygen sensor pick-up |
| 23 | signal input + positive: proportional oxygen sensor pick-up |
| 24 | signal input A positive: proportional oxygen sensor pick-up |
| 25 | EGR valve position copy sensor signal input |
| 26 | signal input: double air mixer position copy sensor |
| 27 | not used |
| 28 | not used |
| 29 | power supply + battery of the following components - fuel high pressure injection pump - variable geometry turbocharger control solenoid valve |
| 30 | not used |
| 31 | engine oil pressure switch signal input |
| 32 | signal input: inlet air pressure and temperature sensor |
| 33 | not used |
| 34 | signal input A negative: proportional oxygen sensor pick-up |
| 35 | variable geometry turbocharger position copy sensor signal input |
| 36 | not used |
| 37 | not used |
| 38 | earth: engine speed sensor + cylinder reference sensor |
| 39 | earth: Exhaust gas recycling valve (egr) |
| 40 | earth of the diesel fuel high pressure sensor |
| 41 | water in diesel sensor battery + supply |
| 42 | not used |
| 43 | EGR valve by-pass position copy sensor signal input |
| 44 | not used |
| 45 | not used |
| 46 | not used |
| 47 | pre-post heat unit diagnostics information |
| 48 | not used |
| 49 | not used |
| 50 | not used |
| 51 | variable geometry turbocharger position copy sensor earth |
| 52 | earth for the following components: double air mixer position copy sensor - inlet air pressure and temperature sensor |
| 53 | proportional oxygen sensor heater control output |
| channel No. | allocation of channels of connector |
|---|---|
| A1 | not used |
| A2 | earth of the EGR by-pass position copy sensor |
| A3 | earth: engine oil level sensor |
| A4 | earth for the following components - Particle filter differential pressure sensor - diesel fuel temperature sensor - air flow meter sensor |
| B1 | not used |
| B2 | earth: coolant temperature sensor |
| B3 | earth: particle emission filter upstream exhaust gas temperature sensor |
| B4 | not used |
| C1 | not used |
| C2 | not used |
| C3 | air flowmeter sensor signal input |
| C4 | air and fuel supply: Particle filter differential pressure sensor |
| D1 | engine oil level sensor signal input |
| D2 | signal input: Particle filter differential pressure sensor |
| D3 | signal input: Water in diesel sensor |
| D4 | control output: fuel high pressure injection pump |
| E1 | cylinder reference sensor signal input |
| E2 | not used |
| E3 | not used |
| E4 | not used |
| F1 | power supply of the engine speed sensor and cylinder reference sensor |
| F2 | air and fuel supply: inlet air pressure and temperature sensor |
| F3 | air flowmeter sensor signal input |
| F4 | not used |
| G1 | engine speed sensor signal input |
| G2 | not used |
| G3 | not used |
| G4 | not used |
| H1 | not used |
| H2 | not used |
| H3 | signal input: coolant temperature sensor |
| H4 | pre-postheating unit control output |
| J1 | signal input: particle emission filter upstream exhaust gas temperature sensor |
| J2 | not used |
| J3 | signal input: diesel fuel temperature sensor |
| J4 | not used |
| K1 | not used |
| K2 | not used |
| K3 | not used |
| K4 | not used |
| L1 | control output +: diesel injector 2 |
| L2 | control output +: diesel injector 3 |
| L3 | control output +: diesel injector 4 |
| L4 | control output -: diesel injector 4 |
| M1 | control output -: diesel injector 2 |
| M2 | control output -: diesel injector 3 |
| M3 | control output +: diesel injector 1 |
| M4 | control output -: diesel injector 1 |
Programming/initialisation
The engine management ECU software is updated by downloading (ECU fitted with a flash EPROM)