Engine Control Module (ECM) X1 (except HP2)

Fig 1: Engine Control Module (ECM) X1 (except HP2) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.35 OG/BK	1786	Park/Neutral Signal
2-8	-	-	Not Used
9	0.5 L-BU/WH	6311	Brake Switch Signal
10	0.5 PU/WH	1668	HO2S High Signal - Bank 1 Sensor 2
11	0.5 TN/WH	1669	HO2S Low Signal - Bank 1 Sensor 2
12	0.35 OG/BK	380	A/C Refrigerant Pressure Sensor Signal
13	0.35 TN	5514	Low Reference
14	0.35 PU/WH	5024	CKP Signal Low (Y91)
15	-	-	Not Available
16	0.35 PU	1589	Fuel Level Sensor Signal
17	0.35 D-BU/WH	473	High Speed Cooling Fan Relay Control
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 Available
23	0.35 PU	1272	Low Reference
24	0.35 D-GN	890	Fuel Tank Pressure Sensor Signal
25-26	-	-	Not Available
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 Sensor 1 Signal
30	0.35 BN	1271	Low Reference
31	0.35 TN/BK	6049	Low Reference
32	0.35 L-BU	1162	Accelerator Pedal Position Sensor 2 Signal
33	0.35 GY	2709	5-Volt Reference 1
34	0.35 GY/WH	2700	5-Volt Reference 1
35	-	-	Not Available
36	0.35 TN	1274	5-Volt Reference 1
37	0.5 TN/BK	472	Intake Air Temperature (IAT) Sensor Signal
38	0.5 TN	2760	Low Reference
39-40	-	-	Not Available
41	0.5 YE	492	Mass Air Flow (MAF) Sensor Signal
42-46	-	-	Not Available
47	0.5 PK/BK	1339	Ignition Voltage
48	0.35 WH/BK	5039	CKP Signal High (Y91)
49	0.5 TN	1671	HO2S Low Signal - Bank 2 Sensor 2
50	0.35 D-GN/WH	465	Primary Fuel Pump Relay Control (L96)
50	0.35 D-GN/WH	465	Fuel Pump Control Module Enable (except L96)
51	0.35 TN	1465	Secondary Fuel Pump Relay Control (except NQZ)
52	0.5 YE/BK	625	Starter Enable Relay Control
53-55	-	-	Not Available
56	0.35 WH/BK	1164	5-Volt Reference 2
57	0.35 YE/BK	1827	Vehicle Speed Signal (L96)
58	0.35 D-GN	335	Low Speed Cooling Fan Relay Control
59	0.35 YE	5991	Powertrain Relay Coil Control
60	-	-	Not Available
61	0.5 WH	1310	EVAP Canister Vent Solenoid Control
62	-	-	Not Available
63	0.8 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 GY/WH	3122	HO2S Heater Low Control - Bank 1 Sensor 2
66-67	-	-	Not Available
68	0.35 BN/WH	419	Malfunction Indicator Lamp (MIL) Control
69	0.5 PU	1670	HO2S High Signal - Bank 2 Sensor 2
70	0.35 L-BU	1937	Rear Tank Fuel Level Sensor Signal (except NQZ)
71	0.35 OG/BK	6399	Replicated Transmission Output Speed (TOS) Signal (MYD without NQH or NP0)
71	0.5 PU/WH	821	Replicated Transmission Output Speed (TOS) Signal (MYD with NQH or NP0)
72	0.5 L-GN/BK	822	Signal Return (MYD with NQH or NP0)
73	3 BK/WH	451	Ground

Connector Part Information

Harness Type: Engine
OEM Connector: 15499466 (L94)
OEM Connector: 13616079 (except L94)
Service Connector: 88988931
Description: 73-Way F Receptacle 0.64 Sealed (BK)

Terminal Part Information

Pins 1, 12-14, 16, 17, 23, 24, 29-34, 36, 48, 50, 51, 56-59, 68, 70 (without NP0 or NQH), 71 (without NP0 or NQH)
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: 9-11, 18-20, 27, 28, 37, 38, 41, 47, 49, 52, 61, 63-65, 69, 71 (NP0 or NQH), 72 (NP0 or NQH)
Terminated Lead: 13575575
Release Tool: J-38125-213
Diagnostic Test Probe: J-35616-64B (L-BU)
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J

Pins: 73
Terminated Lead: Service by Terminal - 7116-4152-02
Release Tool: J-38125-11A
Diagnostic Test Probe: J-35616-35 (VT)
Terminal/Tray: 7116-4152-02/9
Core/Insulation Crimp: A/5