Engine Control Module (ECM) X1 (4.8L/5.3L/6.0L)

Fig 1: Engine Control Module (ECM) X1 (4.8L/5.3L/6.0L) Connector End View

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) X1 (4.8L/5.3L/6.0L)

Pin	Wire	Circuit	Function
1	0.35 OG/BK	1786	Ignition Lock Cylinder Control Actuator Signal
2-8	-	-	Not Used
9	0.5 L-BU/WH	6311	Torque Converter Clutch (TCC) Brake Signal
10	0.8 PU/WH	1668	Heated Oxygen Sensor (HO2S) High Signal - Bank 1 Sensor X
11	0.8 TN/WH	1669	Heated Oxygen Sensor (HO2S) Low Signal - Bank 1 Sensor X
12	0.35 OG/BK	380	A/C Refrigerant Pressure Sensor Signal (C60)
13	0.35 TN	5514	Low Reference (C60)
14-15	-	-	Not Used
16	0.5 PU	1589	Fuel Level Sensor Signal - Primary
17	-	-	Not Used
18	0.5 D-BU	5985	Accessory Wakeup Serial Data
19	0.5 PK	439	Ignition Voltage
20	0.5 RD/WH	440	Battery Positive Voltage
21-22	-	-	Not Used
23	0.35 PU	1272	Low Reference
24	0.5 D-GN	890	Fuel Tank Pressure Sensor Signal
25-26	-	-	Not Used
27	0.5 TN	2501	High Speed GMLAN Serial Data Bus (-)
28	0.5 TN/BK	2500	High Speed GMLAN Serial Data Bus (+)
29	0.35 D-BU	1161	Accelerator Pedal Position (APP) Sensor 1 Signal
30	0.35 BN	1271	Low Reference
31	0.5 TN	2759	Low Reference
32	0.35 L-BU	1162	Accelerator Pedal Position (APP) Sensor 2 Signal
33	0.5 GY	2709	5-Volt Reference
34	0.35 GY	2700	5-Volt Reference (C60)
35	-	-	Not Used
36	0.35 TN	1274	5-Volt Reference
37	0.5 TN	472	Intake Air Temperature (IAT) Sensor Signal
38	0.5 TN	470	Low Reference
39-40	-	-	Not Used
41	0.5 YE	492	Mass Air Flow (MAF) Sensor Signal
42-46	-	-	Not Used
47	0.5 PK	1339	Ignition Voltage
48	-	-	Not Used
49	0.8 TN	1671	Heated Oxygen Sensor (HO2S) Low Signal - Bank 2 Sensor 2
50	0.35 D-GN/WH	465	Fuel Pump Relay Control - Primary
51	-	-	Not Used
52	0.35 YE/BK	625	Starter Enable Relay Control
53-55	-	-	Not Used
56	0.35 WH/BK	1164	5-Volt Reference
57	0.35 YE/BK	1827	Vehicle Speed Signal
58	-	-	Not Used
59	0.5 YE	5991	Powertrain Relay Control
60	-	-	Not Used
61	0.5 WH	1310	Evaporative Emission (EVAP) Canister Vent Solenoid Control
62	-	-	Not Used
63	0.35 D-GN/WH	459	A/C Compressor Clutch Relay Control (C60)
64	0.8 OG/WH	3223	Heated Oxygen Sensor (HO2S) Heater Low Control - Bank 2 Sensor 2
65	0.8 GY/WH	3122	Heated Oxygen Sensor (HO2S) Heater Low Control - Bank 2 Sensor 1
66-67	-	-	Not Used
68	0.35 BN/WH	419	MIL Control
69	0.8 PU	1670	Heated Oxygen Sensor (HO2S) High Signal - Bank 2 Sensor 2
70	-	-	Not Used
71	0.5 OG/BK	6399	Replicated TOS Signal
72	-	-	Not Used
73	3 BK/WH	1551	Ground

Connector Part Information  OEM: 13580802 Service: See Catalog Description: 73-Way F MX123 34566 Series (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: 1, 12, 13, 23, 29, 30, 32, 34, 36, 50, 52, 56, 57, 63, 68 Terminal/Tray: 33467-0003/23 Core/Insulation Crimp: H/H Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU) Pins: 9, 16, 18-20, 24, 27, 28, 31, 33, 37, 38, 41, 47, 59, 61, 71, 10, 11, 49, 64, 65, 69 Terminal/Tray: 33467-0005/23 Core/Insulation Crimp: Pins 9, 16, 18-20, 24, 27, 28, 31, 33, 37, 38, 41, 47, 59, 61, 71 - J/J Core/Insulation Crimp: Pins 10, 11, 49, 64, 65, 69 - K/K Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)