Engine Control Module (ECM) X2 (4.3L)

Fig 1: Engine Control Module (ECM) X2 (4.3L) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1-3	-	-	Not Used
4	0.5 TN	2761	Low Reference
5	0.35 GY/BK	6272	Low Reference
6	0.5 TN	1744	Fuel Injector 1 Control
7	0.5 YE/BK	846	Fuel Injector 6 Control
8	0.5 TN/WH	845	Fuel Injector 5 Control
9	0.5 BN	2129	Low Reference
10	0.5 L-BU/BK	844	Fuel Injector 4 Control
11	0.5 PK/BK	1746	Fuel Injector 3 Control
12	0.5 L-GN/BK	1745	Fuel Injector 2 Control
13	0.5 GY	2704	5-Volt Reference
14-15	-	-	Not Used
16	0.5 YE	581	Throttle Actuator Control Motor Control - 1
17-19	-	-	Not Used
20	0.35 BN	6266	Low Reference
21	-	-	Not Used
22	0.5 PU	2121	Ignition Coil 1 Control
23	0.5 L-BU	2123	Ignition Coil 3 Control
24	0.5 OG/WH	2122	Ignition Coil 2 Control
25-29	-	-	Not Used
30	0.5 D-GN/WH	428	Evaporative Emission (EVAP) Canister Purge Solenoid Control
31	0.5 OG	225	Generator Turn On Signal
32	0.5 BN	582	Throttle Actuator Control Motor Control - 2
33	0.35 D-BU	6259	5-Volt Reference
34	-	-	Not Used
35	0.35 GY	2705	5-Volt Reference
36	0.35 TN/WH	331	Oil Pressure Sensor Signal
37	0.8 PU/WH	1665	Heated Oxygen Sensor (HO2S) High Signal - Bank 1 Sensor 1
38	0.8 PU	1666	Heated Oxygen Sensor (HO2S) High Signal - Bank 2 Sensor 1
39	0.5 L-GN	432	Manifold Absolute Pressure (MAP) Sensor Signal
40	0.35 TN	2752	Low Reference
41	0.35 BK	2755	Low Reference
42	-	-	Not Used
43	0.5 GY	23	Generator Field Duty Cycle Signal
44	-	-	Not Used
45	0.35 WH/BK	6271	Crankshaft Position (CKP) Sensor Signal
46	0.35 D-BU/WH	6265	Camshaft Position (CMP) Sensor Signal
47	-	-	Not Used
48	0.8 TN	1664	Heated Oxygen Sensor (HO2S) Low Signal - Bank 1 Sensor 1
49	0.5 OG/BK	469	Low Reference
50	0.5 GY	1716	Knock Sensor (KS) 1 Signal
51	0.5 D-BU	496	Knock Sensor (KS) 1 Signal
52	-	-	Not Used
53	0.35 GY	2701	5-Volt Reference
54	0.35 PU/WH	6270	5-Volt Reference
55-56	-	-	Not Used
57	0.35 D-GN	485	Throttle Position (TP) Sensor 1 Signal
58	0.5 YE	410	Engine Coolant Temperature (ECT) Sensor Signal
59	0.35 PU	486	Throttle Position (TP) Sensor 2 Signal
60-64	-	-	Not Used
65	0.8 GY/WH	3113	Heated Oxygen Sensor (HO2S) Heater Low Control - Bank 1 Sensor 1
66	0.8 L-GN	3212	Heated Oxygen Sensor (HO2S) Heater Low Control - Bank 2 Sensor 1
67	-	-	Not Used
68	0.8 TN	1667	Heated Oxygen Sensor (HO2S) Low Signal - Bank 2 Sensor 1
69	-	-	Not Used
70	0.5 GY	2303	Knock Sensor (KS) 2 Signal
71	0.5 L-BU	1876	Knock Sensor (KS) 2 Signal
72	-	-	Not Used
73	3 BK/WH	1551	Ground

Connector Part Information

OEM: 15497996
Service: 88988372
Description: 73-Way F 0.64 2.8 Series, Sealed (BK)

Terminal Part Information

Pins: 73
Terminal/Tray: 7116-4152-02/9
Core/Insulation Crimp: A/5
Release Tool/Test Probe: 12094430/J-35616-35 (VT)

Pins: 5, 20, 33, 35, 36, 40, 41, 45, 46, 53, 54, 57, 59
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 4, 6-13, 16, 22-24, 30-32, 39, 43, 49, 50, 51, 58, 70, 71, 37, 38, 48, 65, 66, 68
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 4, 6-13, 16, 22-24, 30-32, 39, 43, 49-51, 58, 70, 71 - J/J
Core/Insulation Crimp: Pins 37, 38, 48, 65, 66, 68 - K/K
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)