Engine Control Module (ECM) C3

Fig 1: ECM C3 Connector

Courtesy of GENERAL MOTORS CORP.

Engine Control Module Connector End Views

Connector Part Information

OEM: 15418484
Service: 88953347
Description: 56-Way F 105-B (GY)

Terminal Part Information

Pins: 1, 2, 3, 12, 13, 16, 18, 19, 20, 21, 22, 23, 24, 25, 37, 38, 40, 41, 42, 43, 44, 45, 46, 48, 49, 51
Terminal/Tray: 15359541/4
Core/Insulation Crimp: M/M
Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)

Engine Control Module (ECM) C3

Pin	Wire Color	Circuit No.	Function
1	PU/WH	3110	Heated Oxygen Sensor High Signal Bank 1 Sensor (1)
2	TN/WH	3111	Heated Oxygen Sensor Low Signal Bank 1 Sensor (1)
3	PU/WH	5281	Heated Oxygen Sensor Pump Current Bank 2 Sensor (1)
4-11	-	-	Not Used
12	D-BU	1936	Primary Fuel Level Sensor Signal
13	GY/WH	3122	Heated Oxygen Sensor Heater Low Control Bank 1 Sensor (2)
14-15	-	-	Not Used
16	OG/WH	3223	Heated Oxygen Sensor Heater Low Control Bank 2 Sensor (2)
17	-	-	Not Used
18	OG/BK	1786	Transmission Park/Neutral Signal (1)
19	TN/WH	3121	Heated Oxygen Sensor Low Signal Bank 1 Sensor (2)
20	PU	3220	Heated Oxygen Sensor High Signal Bank 2 Sensor (2)
21	TN	3221	Heated Oxygen Sensor Low Signal Bank 2 Sensor (2)
22	OG	5280	Heated Oxygen Sensor Input Pump Current Bank 2 Sensor (1)
23	BN	1174	Oil Level Switch Signal
24	L-BU	1937	Secondary Fuel Level Sensor Signal
25	TN/WH	331	Oil Pressure Sensor Signal
26-36	-	-	Not Used
37	TN	2759	Fuel Tank Pressure Sensor Low Reference
38	BK	2755	Oil Pressure Sensor Low Reference
39	-	-	Not Used
40	GY/WH	3113	Heated Oxygen Sensor Heater Low Control Bank 1 Sensor (1)
41	L-GN	3212	Heated Oxygen Sensor Heater Low Control Bank 2 Sensor (1)
42	GY	2709	5-Volt Reference (LH1/LH2)
43	PU	3120	Heated Oxygen Sensor High Signal Bank 1 Sensor (2)
44	D-GN	890	Fuel Tank Pressure Sensor Signal
45	PU/WH	3210	Heated Oxygen Sensor High Signal Bank 2 Sensor (1)
46	TN/WH	3211	Heated Oxygen Sensor Low Signal Bank 2 Sensor (1)
47	-	-	Not Used
48	WH	5279	Heated Oxygen Sensor Pump Current Bank 1 Sensor (1)
49	L-GN	5278	Heated Oxygen Sensor Input Pump Current Bank 1 Sensor (1)
50	-	-	Not Used
51	GY	2705	Oil Pressure Sensor 5-Volt Reference
52-56	-	-	Not Used