K20 Engine Control Module X1

Fig 1: Engine Control Module X1 Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Size	Color	Circuit	Function	Option
1	0.5	OG/BK	1786	Park/Neutral Signal	-
2-8	-	-	-	Not Used	-
9	0.5	WH/D-BU	17	Stop Lamp Switch Signal	-
10	0.5	PU/WH	1668	HO2S High Signal (Bank 1 Sensor 2)	-
11	0.5	BN/WH	1669	HO2S Low Signal (Bank 1 Sensor 2)	-
12	0.5	OG/BK	380	A/C Refrigerant Pressure Sensor Signal	-
13	0.5	BN/D-GN	5514	Low Reference	-
14-15	-	-	-	Not Used	-
16	0.5	PU	1589	Fuel Level Sensor Signal (Primary)	-
17	0.5	D-BU/BK	473	High Speed Cooling Fan Relay Control	-
18	0.5	D-BU	5985	Accessory Wakeup Serial Data	-
19	0.5	PK	439	Ignition 1 Voltage	-
20	0.75	OG/BK	540	Battery Positive Voltage	-
21	0.5	D-BU	1809	Brake Booster Vacuum Sensor Signal	-
22	0.5	L-GN/BK	6258	Low reference	-
23	0.5	PU	1272	Low Reference	-
24	0.5	D-GN	890	Fuel Tank Pressue Sensor Signal	-
25-26	-	-	-	Not Used	-
27	0.5	BN	2501	High Speed GMLAN Serial Data Bus-	-
28	0.5	BN/BK	2500	High Speed GMLAN Serial Data Bus+	-
29	0.5	D-BU/WH	1161	APP Sensor 1 Signal	-
30	0.5	BN	1271	Low Reference	-
31	0.5	BN/YE	452	Low Reference	-
32	0.5	L-BU	1162	APP Sensor 2 Signal	-
33	0.5	GY	2709	Fuel Tank Pressure Sensor 5-Volt Reference	-
34	0.5	GY	1688	5-Volt Reference	-
35	-	-	-	Not Used	-
36	0.5	BN/YE	1274	5-Volt Reference	-
37	0.5	BN/RD	472	IAT Sensor Signal	-
38	0.5	BN/WH	2760	Low Reference	-
39	-	-	-	Not Used	-
40	0.5	WH	1579	Fuel Composition Sensor Signal	-
41	0.5	YE	492	MAF Sensor Signal	-
42-46	-	-	-	Not Used	-
47	0.75	PK/D-BU	5290	Ignition 1 Voltage	-
48	-	-	-	Not Used	-
49	0.5	BN/WH	1671	HO2S Low Signal (Bank 2 Sensor 2)	-
50	0.5	D-GN/WH	465	Fuel Pump Relay Control (Primary)	-
51	-	-	-	Not Used	-
52	0.5	YE	447	Starter Relay Coil Control	-
53	0.5	L-GN	6257	5-Volt Reference	-
54-55	-	-	-	Not Used	-
56	0.5	WH/BK	1164	5-Volt Reference	-
57	-	-	-	Not Used	-
58	0.5	D-GN	335	Low Speed Cooling Fan Relay Control	-
59	0.5	BN	5069	Main Relay Control	-
60	-	-	-	Not Used	-
61	0.5	WH	1310	EVAP Canister Vent Solenoid Valve Control	-
62	-	-	-	Not Used	-
63	0.5	D-GN/WH	459	A/C Compressor Clutch Relay Control	-
64	0.5	OG/WH	3223	HO2S Heater Low Control (Bank 2 Sensor 2)	-
65	0.5	BN	3122	HO2S Heater Low Control (Bank 1 Sensor 2)	-
66-67	-	-	-	Not Used	-
68	0.5	BN/WH	419	MIL Control	-
69	0.5	PU	1670	HO2S High Signal (Bank 2 Sensor 2)	-
70	0.5	L-BU	1937	Fuel Level Sensor Signal (Secondary)	-
71-72	-	-	-	Not Used	-
73	2	BK	450	Ground	-

Connector Part Information

Harness Type: Forward Lamp
OEM Connector: 7283-9139-30
Service Connector: 88988931
Description: 73-Way F (BK)

Terminal Part Information

Pins: 8, 18
Terminated Lead: 13575811
Release Tool: J-38125-213
Diagnostic Test Probe: J-35616-64B (L-BU)
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H

Pins: 1, 9-13, 16, 17, 19, 20-24, 26-34, 36-38, 41, 42, 47, 49, 50, 52-54, 56, 58, 59, 61, 63, 64-66, 68-72
Terminated Lead: 13575575
Release Tool: J-38125-213
Diagnostic Test Probe: J-35616-64B (L-BU)
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins: 1, 9-13, 16, 17, 19, 21-24, 26-34, 36-38, 41, 42, 49, 50, 52-54, 56, 58, 59, 61, 63, 64-66, 68-72 - J/J
Core/Insulation Crimp: Pins: 20, 47 - K/K

Pin: 73
Terminated Lead: 13575351
Release Tool: J-38125-12A
Diagnostic Test Probe: J-35616-35 (VT)
Terminal/Tray: 1326030-8/17
Core/Insulation Crimp: A/4