Generation 2 Automatic ECU wiring by Rabbit

Thanks to Bart, Christian, Damian and Mohamed.

ECU - Mitsubishi Genuine Part Number MD331116, MD335999


1	2	3									12	13
1	2	3	4	5	6	7	8	9	10	11	12	13
14	15	16									25	26
14	15	16	17	18	19	20	21	22	23	24	25	26

(B-60)



31	32	33	34	35	36	37	38

39	40	41	42	42	44	45	46

(B-61)



51	52	53	54	55	56

57	58	59	60	61	62

(B-62)


71									80	81
71	72	73	74	75	76	77	78	79	80	81
82									91	92
82	83	84	85	86	87	88	89	90	91	92

Maybe compatable with all of the following MD335299, MD352555, MD336610, MD352556, MD334383, MD331116

B-59

Pin #	IN / OUT	Wire size (mm²)	Wire colour	Sheild	Description	Paired with	Test	Result
1	IN	0.85	Yellow with Blue trace		Injector 1 ground control		@ warm idle: Quickly depress accelerator	~11 - 14.4v: Short dip in voltage
2	IN	0.85	Blue with Green trace		Injector 3 ground control		@ warm idle: Quickly depress accelerator	~11 - 14.4v: Short dip in voltage
3					No connection
4	IN	0.50	Blue with Yellow trace		Idle speed control servo (coil A1)	17	@ warm idle: Stop and restart engine	~0.0 - 6.0v repeating
5	IN	0.50	Solid White		Idle speed control servo (coil B1)	18	@ warm idle: Stop and restart engine	~0.0 - 6.0v repeating
6					No connection
7	OUT	0.50	Solid Black	Y	Torque reduction request 1 (Automatic Gearbox ECU)	59	@ idle: While driving and during speed changes	~4.5 - 5.5v: ~0.0 - 3.0v
8	IN	0.50	Black with Blue trace		Fuel pump relay ground control		With key ON @ idle	~12.0 - 14.4v ~0.0 - 3.0v
9					No connection
10	OUT	0.50	Black with Yellow trace		Ignition tower transistor A (? cyl 2 & 3)	23	With engine @3000rpm	~0.3 - 3.0v
11					No connection
12	IN	0.50	Red with Yellow trace		Power source	38	With key ON	~12.0 - 14.4v
13	OUT	1.25	Solid Black		Chassis ground		Resistance to chassis	0.0 Ohms
Pin #	IN / OUT	Wire size (mm²)	Wire colour	Sheild	Description	Paired with	Test	Result
14	IN	0.85	Yellow with Black trace		Injector 2 ground control		@ warm idle: Quickly depress accelerator	~11 - 14.4v: Short dip in voltage
15	IN	0.85	Light Green with White trace		Injector 4 ground control		@ warm idle: Quickly depress accelerator	~11 - 14.4v: Short dip in voltage
16					No connection
17	IN	0.50	Solid Yellow		Idle speed control servo (coil A2)	4	@ warm idle: Stop and restart engine	~0.0 - 6.0v repeating
18	IN	0.50	Solid Green		Idle speed control servo (coil B2)	5	@ warm idle: Stop and restart engine	~0.0 - 6.0v repeating
19					No connection
20	IN	0.30	Solid Blue		(?) Fan relay (high) (? A/C control unit)	21	Fan (off) & temp <90^oc Fan (fast) & temp >105^oc	~12.0 - 14.4v ~0.0 - 3.0v
21	IN	0.50	Solid Blue		(?) Fan relay (low) (? A/C ??? )	20	Fan (off) & temp <90^oc Fan (slow) & temp >105^oc	~12.0 - 14.4v ~0.0 - 3.0v
22	IN	0.30	Green with White trace		A/C clutch relay	45	@ idle (A/C off): A/C ON	~12.0 - 14.4v (>6.0v): ~0.0 - 3.0v
23	OUT	0.50	Black with Green trace		Ignition power transistor B (? cyl 1 & 4)	10	With engine @3000rpm	~0.3 - 3.0v
24					No connection
25	IN	0.50	Red with Yellow trace		Power source	38	With key ON	~12.0 - 14.4v
26	OUT	1.25	Solid Black		Ground ( + O2 sensor wire shielding)		Resistance to chassis	0.0 Ohms

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B-60

Pin #	IN / OUT	Wire size (mm²)	Wire colour	Sheild	Description	Paired with	Test	Result
31					No connection
32					No connection
33	IN	0.50	Blue with White trace		(?) Alternator 'G'	41	Test	Result
34	IN	0.50	Red with Blue trace		Oil control valve switch ground control (MIVEC solenoid)		Test	Result
35					No connection
36	IN	0.50	Light Green with Black trace		Engine check light ground control (dash)		Test	Result
37	OUT	0.85	Yellow with Black trace		5v to powersteering oil pressure switch		Test	Result
38	IN	0.50	Solid Red		Engine control relay ground control (turns on 12 & 25)	12 & 25	Test	Result
Pin #	IN / OUT	Wire size (mm²)	Wire colour	Sheild	Description	Paired with	Test	Result
39					No connection
40	IN	0.50	Blue with White trace		Alarm light ground control (dash)		Test	Result
41	OUT	0.50	Solid White		(?) 5v to Alternator 'FR'	41	Test	Result
42					No connection
43					No connection
44					No connection
45	IN	0.30	Green with Black trace		A/C (? Engine coolant Temperature switch)	22	Test	Result
46					No connection

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B-61

Pin #	IN / OUT	Wire size (mm²)	Wire colour	Sheild	Description	Paired with	Test	Result
51					No connection
52					No connection
53					No connection
54					No connection
55					No connection
56	OUT	0.50	Solid Light Green		Diagnositc connector (pin 1)	62	Test	Result
Pin #	IN / OUT	Wire size (mm²)	Wire colour	Sheild	Description	Paired with	Test	Result
57					No connection
58	OUT	0.50	Solid White		RPM Signal		Test	Result
59	IN	0.50	Solid White	Y	Torque reduction execution 1 (Automatic Gearbox ECU)	7
60	IN	0.50	Solid Red		O2 sensor ground control (heater element)	76	Test	Result
61					No connection
62	OUT	0.50	Solid Orange		Diagnositc connector (pin 7)	56	Test	Result

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B-62

Pin #	IN / OUT	Wire size (mm²)	Wire colour	Sheild	Description	Paired with	Test	Result
71	IN	1.25	Black with Yellow trace		Starter relay via Gear inhibitor switch (only start in N or P)	91	Test	Result
72	OUT	0.50	Red with White trace		5v to Air intake temperature sensor		Test	Result
73					No connection
74	OUT	0.50	Solid Pink		High temp sensor (+)	77	Test	Result
75					No connection
76	IN	0.50	Solid White	Y	O2 sensor (heated type) (for v6, back 3 cyl)	60	Test	Result
77	IN	0.50	White with Blue trace		High temp sensor (-)	74	Test	Result
78	IN	0.50	Solid White	Y	Detonation sensor		Test	Result
79					No connection
80	IN	0.50	Red with Black trace		Battery backup		Test	Result
81	OUT	0.50	Green with Blue trace		5v to Throttle position sensor Atmospheric/Barometric pressure sensor		Test	Result
Pin #	IN / OUT	Wire size (mm²)	Wire colour	Sheild	Description	Paired with	Test	Result
82	IN	1.25	Black with White trace		Gets 12v when the key is turned to start		Test	Result
83	OUT	0.50	Yellow with Green trace		5v to engine coolant temperature sensor		Test	Result
84	IN	0.50	Green with White trace		Throttle position sensor		Test	Result
85	IN	0.50	Yellow with Red trace		Atmospheric/Barometric pressure sensor (MAP)		Test	Result
86	OUT	0.50	Solid Yellow		5v to vechicle speed sensor		Test	Result
87	OUT	0.50	Yellow with Red trace		5v to idle switch (in Throttle position sensor)		Test	Result
88	OUT	0.50	Blue with Red trace		Camshaft position sensor		Test	Result
89	OUT	0.50	Brown with Green trace		Crank angle sensor		Test	Result
90					No connection
91	OUT	1.25	Black with Yellow trace		Gear inhibitor switch (only start in N or P)	71	Test	Result
92	IN	0.50	Solid Black		Ground for: Throttle position sensor, Atmospheric/Barometric pressure sensor, Engine coolant temperature sensor, Plus others		Test	Result

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Notes:

IN and OUT are current flow (eg: an IN can connect to ground completing a circuit through a relay and turn on enternal devices)
It maybe a pair is the up/down 'base idle' and the other is up/down 'fast speed idle' for power steering and Air conditioning (A/C)
4(IN) & 17(IN) = Idle speed control servo (coil A) ( both switch to ground) (connect to pins 1 & 3 on servo)
5(IN) & 18(IN) = Idle speed control servo (coil B) (both switch to ground) (connect to pins 4 & 6 on servo)
( servo pins 2 and 5 are connected to the engine control relay)