TechArticles/MarelliIAWConnections

Overboost valve X X X X Absolute pressure sensor - B (S) Overboost solenoid valve Ground Evo 1 Ground X Diagnostic X Diagnostic X Absolute pressure sensor - B (A) Controlled supercharging solenoid valve Diagnostic X X Diagnostic X Absolute pressure sensor Overboost solenoid valve Ground Absolute pressure sensor (B) Absolute pressure sensor - B (-) Absolute pressure sensor - B (B) Ground to Butterfly valve position sensor, Air temp sensor, Coolant temp sensor Control signal to engine control lamp X Instrument panel (System failure warning) Instrument panel (IAW system fail warning) X Instrument Panel (Overboost Warning Light)

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
12	Control signal to engine control lamp
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)
16	Control signal to waste gate control
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
21	AC	Connector block to AC, if present	Connector block to AC, if present
22	Knock sensor
23	Signal from timing sensor
24	Ground to ignition amplifier
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
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
30	Power to sensors	Absolute pressure sensor (A)	Absolute pressure sensor - B (+)	Absolute pressure sensor - B (A)	Timing Sensor	Absolute pressure sensor - A (+)	Absolute pressure sensor - A (A)	Absolute pressure sensor	Butterfly valve position sensor (A)	Butterfly valve position sensor (A)	Butterfly valve position sensor (A)	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 Fuel injector relay (87) Detonation sensor Distributor sensor Ignition amplifier (3) X Diagnostic Coolant temp sensor Air temp sensor Injector relay feed (87) Detonation sensor Distributor sensor Ignition amplifier (3) Engine coolant temp sensor Air temp sensor Instrument panel (IAW system fail warning) Injector relay feed (87) Air conditioner cable join Air conditioner cable join Detonation sensor Distributor sensor Electronic ignition control module (3) X Diagnostic Engine coolant temp sensor Air temp sensor Ignition coil unit 1 Ignition coil unit 2 Multiple relay (10) Air conditioner coupling relay feed Detonation sensor Timing sensor Ignition unit Ignition unit Diagnostic Instrument panel (C-3) Engine coolant temp sensor