Engine Control Module (ECM) X1 (HV-240) (L79)

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

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) X1 Connector Terminal Identification (HV-240) (L79)

Pin	Wire	Circuit	Function
1	0.5 BK/WH	51	Ground
2	0.5 BK/WH	51	Ground
3	0.5 YE/BK	496	Knock Sensor Signal
4	D-GN	411	Exhaust Gas Recirculation (EGR) Valve Control
5	-	-	Not Used
6	0.5 YE/BK	1868	Low Reference
7	0.5 D-BU	417	Throttle Position (TP) Sensor Signal
8	0.5 PK/BK	1746	Fuel Injector 3 Control
9	0.5 BK	1744	Fuel Injector 1 Control
10	BK/WH	252	Low Reference
11	0.5 YE	410	Engine Coolant Temperature (ECT) Sensor Signal
12	D-GN/RD	1665	Oxygen (O2) Sensor 1 Low Reference (Unleaded Only)
13	0.5 PU/WH	1749	Idle Air Control (IAC) Coil B High Control
14	-	-	Not Used
15	0.5 GY	416	5-Volt Reference
16	0.5 OG/BK	469	Low Reference
17	0.5 BK/WH	51	Ground
18	0.5 L-BU	406	Ignition Coil (IC) 1 and 4 Control
19	0.5 D-GN/WH	423	Ignition Coil (IC) 2 and 3 Control
20	0.5 D-GN/WH	428	Evaporative Emissions (EVAP) Canister Purge Solenoid Control
21	0.5 D-BU/WH	1869	Crankshaft Position (CKP) Sensor Signal
22	0.5 L-GN/BK	1745	Fuel Injector 2 Control
23	0.5 BN	472	Intake Air Temperature (IAT) Sensor 5-Volt Reference
24	0.5 L-GN	432	Manifold Absolute Pressure (MAP) Sensor Signal
25	0.5 BN/WH	633	Camshaft Position (CMP) Sensor Signal
26	0.5 L-BU/BK	844	Fuel Injector 4 Control
27	0.5 GY	1653	Oxygen (O2) Sensor 1 Signal (Unleaded Only)
28	0.5 BN	1747	Idle Air Control (IAC) Coil A High Control
29	0.5 WH	444	Idle Air Control (IAC) B Low Control
30	0.5 YE/WH	1748	Idle Air Control (IAC) A Low Control
31	0.5 L-BU/BK	1688	5-Volt Reference Voltage
32	0.5 BK/YE	808	Low Reference

Connector Part Information