Engine Control Module (ECM) X1 (LZ4)

WARNING: This page is about a different car, the 2008 Saturn Aura. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Control Module (ECM) X1 (LZ4) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.35 OG	1786	Park/Neutral Signal
2-8	-	-	Not Used
9	0.35 WH	17	Stop Lamp Supply Voltage
10	0.8 PU	3120	HO2S High Signal (Bank 1 Sensor 2)
11	0.8 TN/WH	3121	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
14-15	-	-	Not Used
16	0.35 PU	1589	Fuel Level Sensor Signal
17	0.35 D-BU	473	High Speed Cooling Fan Relay Control
18	0.35 BN	4	Accessory Voltage
19	0.35 PK	639	Ignition 1 Voltage
20	0.35 RD/WH	540	Battery Positive Voltage
21-22	-	-	Not Used
23	0.35 PU	1272	Low Reference
24	0.35 D-GN	890	Fuel Tank Pressure Sensor Signal
25-26	-	-	Not Used
27	0.35 TN	2501	High Speed GMLAN Serial Data Bus-
28	0.35 TN/BK	2500	High Speed GMLAN Serial Data Bus+
29	0.35 D-BU	1161	APP Sensor 1 Signal
30	0.35 BN	1271	Low Reference
31	0.35 OG/BK	1057	Low Reference
32	0.35 L-BU	1162	APP Sensor 2 Signal
33	0.35 GY	705	5-Volt Reference 1
34	0.35 GY	2700	5-Volt Reference 1
35	-	-	Not Used
36	0.35 TN	1274	5-Volt Reference 1
37	0.5 TN	472	IAT Sensor Signal
38	0.5 TN/BK	2760	Low Reference
39-40	-	-	Not Used
41	0.5 YE	492	MAF Sensor Signal
42-46	-	-	Not Used
47	0.8 PK/BK	5290	Ignition 1 Voltage
48	0.35 BN	818	Vehicle Speed Signal
49	0.8 TN	3221	HO2S Low Signal (Bank 2 Sensor 2)
50	0.35 D-GN/WH	465	Fuel Pump Relay Control
51	-	-	Not Used
52	0.35 PU/WH	6386	Starter Relay Coil Control
53-55	-	-	Not Used
56	0.35 WH/BK	1164	5-Volt Reference 2
57	-	-	Not Used
58	0.35 D-GN	335	Low Speed Cooling Fan Relay Control
59	0.35 BN	5069	Powertrain Relay Control
60	0.35 TN	2759	Low Reference
61	0.35 WH	1310	EVAP Canister Vent Solenoid Control
63	0.35 D-GN/WH	459	A/C Compressor Clutch Relay Control
64	0.35 OG/WH	3223	HO2S Heater Low Control (Bank 2 Sensor 2)
65	0.35 GY/WH	3122	HO2S Heater Low Control (- Bank 2 Sensor 1)
66-67	-	-	Not Used
68	0.35 BN/WH	419	MIL Control
69	0.8 PU	3220	HO2S High Signal (Bank 2 Sensor 2)
70-72	-	-	Not Used
73	2 BK/WH	451	Ground

Connector Part Information

OEM: 13542537
Service: See Catalog
Description: 73-Way F Receptacle 0.64 2.8 Sealed (BK)

Terminal Part Information

Pins: 73
Terminal/Tray: 7116-4152-02/9
Core/Insulation Crimp: 2/5
Release Tool/Test Probe: 12094430/J-35616-35 (VT)

Pins: 1, 9, 12, 13, 16, 17, 18, 19, 20, 23, 24, 27, 28, 29, 30, 31, 32, 33, 34, 36, 48, 50, 52, 56, 58, 59, 60, 61, 63, 64, 65, 68
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 10, 11, 47, 49, 69, 37, 38, 41
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 10, 11, 47, 49, 69 - K/K
Core/Insulation Crimp: Pins 37, 38, 41 - J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)