Engine Control Module (ECM) - X3

Fig 1: Engine Control Module (ECM) - X3 Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1-2	-	-	Not Used
3	0.5 TN/WH	3211	HO2S Low Reference Bank 2 Sensor 1
4	0.5 PU/WH	3210	HO2S Reference Voltage Bank 2 Sensor 1
5	0.5 PU	3220	HO2S Reference Voltage Bank 2 Sensor 2
6	0.5 TN	3221	HO2S Low Reference Bank 2 Sensor 2
7	0.35 OG	225	Generator Turn On Signal
8-13	-	-	Not Used
14	0.5 L-BU	7126	Super Charger Vacuum Bypass Valve Control (LC3)
15	0.5 L-GN	3212	HO2S Heater Low Control Bank 2 Sensor 1
16	0.35 PK	2014	Coolant Pump Relay Control (LC3)
17	-	-	Not Used
18	0.35 BN	1174	Oil Level Switch Signal
19-20	-	-	Not Used
21	0.35 BK/WH	2751	Low Reference
22	0.35 OG/BK	6014	Low Reference (LC3)
23	0.35 OG/BK	469	Low Reference
24-28	-	-	Not Used
29	0.35 GY	23	Generator Field Duty Cycle Signal
30-32	-	-	Not Used
33	0.35 TN	2501	High Speed GMLAN Serial Data BUS -
34	0.35 YE/BK	6120	Low Reference (LC3)
35	0.35 TN	2761	Low Reference
36	-	-	Not Used
37	0.35 GY	2700	5-Volt Reference - 1
38	0.35 WH/BK	2932	5-Volt Reference - 2 (LC3)
39	0.35 GY	2704	5-Volt Reference - 2
40-45	-	-	Not Used
46	0.35 OG/BK	1786	Park/Neutral Signal
47	-	-	Not Used
48	0.35 D-GN/WH	428	EVAP Canister Purge Solenoid Control
49	0.35 D-GN	335	Cooling Fan Speed Control
50	0.5 OG/BK	3223	HO2S Heater Low Control Bank 2 Sensor 2
51-52	-	-	Not Used
53	0.35 TN/BK	2500	High Speed GMLAN Serial Data Bus +
54	-	-	Not Used
55	0.35 YE	410	ECT Sensor Signal
56	0.35 L-BU	6118	IAT 2 Signal (LC3)
57	0.35 OG/BK	380	A/C Refrigerant Pressure Sensor Signal
58	0.35 GY/BK	433	BARO Sensor Signal (LC3)
59	0.35 L-GN	432	MAP Sensor Signal
60-72	-	-	Not Used
73	2 BK/WH	451	Ground

Connector Part Information

Terminal Part Information

Pins: 7, 16, 18, 21, 22, 23, 29, 33, 34, 35, 37, 38, 39, 46, 48, 49, 53, 55, 56, 57, 58, 59
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)