TechArticles/MarelliIAWConnections
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| Pin | Description | 8V | 16V | Evo 1 | Evo 2 |
|---|---|---|---|---|---|
| 1 | Ground | Ground | Ground | Ground | Ground |
| 2 | Signal from Lambda sensor | - | - | - | Heated lambda sensor |
| 3 | Ground to crankshaft sensor | RPM & TDC sensor | RPM & TDC sensor | RPM & TDC sensor | RPM & TDC sensor |
| 4 | Signal from crankshaft sensor | RPM & TDC sensor | RPM & TDC sensor | RPM & TDC sensor | RPM & TDC sensor |
| 5 | Ground to timing sensor | Distributor sensor | Distributor sensor | Distributor sensor | Timing sensor |
| 6 | Knock sensor | Detonation sensor | Detonation sensor | Detonation sensor | Detonation sensor |
| 7 | Control signal to idle speed/rev. counter/trip computer | - | - | - | Instrument panel (D-6) |
| 8 | Diagnosis | Diagnostic | Diagnostic | Diagnostic | Diagnostic |
| 9 | Signal from CO potentiometer/MAP | - | Absolute pressure sensor - A (S) | Absolute pressure sensor - A (C) | - |
| 10 | Control signal to main relay | Fuel injection relay (85) | - | - | - |
| 11 | Ground to sensors | Diagnostic
Absolute pressure sensor (B) |
Diagnostic
Absolute pressure sensor - B (-) |
Diagnostic
Absolute pressure sensor - B (B) |
Diagnostic
Ground to Butterfly valve position sensor, Air temp sensor, Coolant temp sensor |
| 12 | Control signal to engine control lamp | - | Instrument panel (System failure warning) | Instrument panel (IAW system fail warning) | - |
| 13 | Ignition adjust | - | - | - | - |
| 14 | Ignition adjust/ABS | - | - | Anti-lock braking system control unit (3) | Anti-lock braking system control unit (3) |
| 15 | Signal from MAP sensor | Absolute pressure sensor (C) | Absolute pressure sensor - B (S) | Absolute pressure sensor - B (A) | Absolute pressure sensor |
| 16 | Control signal to waste gate control | Overboost valve
Instrument Panel (Overboost Warning Light) |
Overboost solenoid valve | Controlled supercharging solenoid valve | Overboost solenoid valve |
| 17 | Signal from throttle potentiometer | Butterfly valve position sensor (B) | Butterfly valve position sensor (B) | Butterfly valve position sensor (B) | Butterfly valve position sensor |
| 18 | Control to injection valve #4 | Injector #4 | Injector #4 | Injector #4 | Injector #4 |
| 19 | Ground | Ground | Ground | Ground | Ground |
| 20 | Power from main relay | Fuel injector relay (87) | Injector relay feed (87) | Instrument panel (IAW system fail warning)
Injector relay feed (87) |
Ignition coil unit 1
Ignition coil unit 2 Multiple relay (10) |
| 21 | AC | Connector block to AC, if present | Connector block to AC, if present | Air conditioner cable join
Air conditioner cable join |
Air conditioner coupling relay feed |
| 22 | Knock sensor | Detonation sensor | Detonation sensor | Detonation sensor | Detonation sensor |
| 23 | Signal from timing sensor | Distributor sensor | Distributor sensor | Distributor sensor | Timing sensor |
| 24 | Ground to ignition amplifier | Ignition amplifier (3) | Ignition amplifier (3) | Electronic ignition control module (3) | Ignition unit
Ignition unit |
| 25 | Control signal to amplifier | Ignition amplifier (6) | Ignition amplifier (6) | Electronic ignition control module (6) | Ignition unit |
| 26 | Control signal to amplifier | - | - | - | Ignition unit |
| 27 | Diagnosis | Diagnostic | Diagnostic | Diagnostic
Instrument panel (C-3) | |
| 28 | Control signal to pump relay | Fuel pump relay (85) | Fuel pump relay feed (85) | Fuel pump relay (85) | Multiple relay (?) |
| 29 | Signal from coolant temp sensor | Coolant temp sensor | Engine coolant temp sensor | Engine coolant temp sensor | Engine coolant temp sensor |
| 30 | Power to sensors | Absolute pressure sensor (A)
Butterfly valve position sensor (A) |
Absolute pressure sensor - B (+)
Absolute pressure sensor - A (+) Butterfly valve position sensor (A) |
Absolute pressure sensor - B (A)
Absolute pressure sensor - A (A) Butterfly valve position sensor (A) |
Timing Sensor
Absolute pressure sensor Butterfly valve position sensor |
| 31 | Signal from air temp sensor | Air temp sensor | Air temp sensor | Air temp sensor | Air temp sensor |
| 32 | Control to injection valve #2 | Injector #2 | Injector #2 | Injector #2 | Injector #2 |
| 33 | Control to injection valve #3 | Injector #3 | Injector #3 | Injector #3 | Injector #3 |
| 34 | Control signal to idle speed | Automatic idle adjustment solenoid air valve | Automatic idle adjustment solenoid air valve | Automatic idle adjustment solenoid air valve | Automatic idle adjustment solenoid air valve |
| 35 | Control to injection valve #1 | Injector #1 | Injector #1 | Injector #1 | Injector #1 |