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Engine Control Module (ECM) - Sirius D42 (1.2L) (LMU)

Fig 1: Engine Control Module (ECM) - Sirius D42 (1.2L) (LMU) Connector End View
GM1500001Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) - Sirius D42 (1.2L) (LMU)

Pin Wire Circuit Function
1-2 - - Not Used
3 BK - Ground
4 - - Not Used
5 D-BU - Exhaust Gas Recirculation (EGR) Valve Control
6 L-GN - Fuel Pump Relay Control
7 BN - Main Relay Control
8 WH - Engine Coolant Temperature (ECT) Gage Signal
9 D-BU - High Speed Cooling Fan Relay Control
10 D-GN - Low Speed Cooling Fan Relay Control
11 BK/WH - Ground
12 L-BU (M/T) - Low Reference
WH
13 BN - Low Reference
14 PU - Heated Oxygen Sensor (HO2S) 2 Low Reference
15 - - Not Used
16 L-BU - Low Reference
17 YE - Low Reference
18 - - Not Used
19 BN - Low Reference
20 OG/BK - A/C Pressure Sensor Signal
21 GY - Fuel Level Sensor Signal
22 L-GN/WH - Camshaft Position (CMP) Sensor Signal
23 WH/BK - Serial Data
24 BK - Ground
25 BK - Ground
26 - - Not Used
27 BN - Octane Selector Switch
28 BK - Ground
29 PK - Ignition 1 Voltage
30 RD/WH - Battery Positive Voltage
31 WH - Ignition Coil and 2 and 3 Control
32 OG - Ignition Coil and 1 and 4 Control
33 BK - Ground
34 - - Not Used
35 PK/BK - Heated Oxygen Sensor (HO2S) 1 Signal
36-38 - - Not Used
39 BN - Malfunction Indicator Lamp (MIL) Control
40 PU - Fuel Gage Control
41 D-GN - A/C Clutch Relay Control
42 OG - Knock Sensor (KS) Signal
D-BU (M/T)
43 L-GN - Idle Motor Position Signal
44 D-GN/WH - Heated Oxygen Sensor (HO2S) 1 Low Reference
45 D-GN - Exhaust Gas Recirculation (EGR) Valve Control
46 L-BU - Fuel Level Sensor Signal
47-48 - - Not Used
49 D-BU - Evaporator Temperature Sensor Signal
50 L-GN - 5-Volt Reference
51 D-GN - Vehicle Speed Signal
52 D-GN/WH - A/C Request Signal
53 L-BU - Rough Road Signal
54 D-BU/WH - Crankshaft Position (CKP) Sensor Signal
55 PK - Idle Switch Position Signal
56 BK/WH - Serial Data
57 YE - CAN Serial Data Low
58 - - Not Used
59 L-BU/WH - Fuel Injector 1 Control
60 L-GN/BK - Fuel Injector 3 Control
61 L-BU - Idle Speed Motor Feed
62 D-BU - Idle Speed Motor Return
63 - - Not Used
64 BN - Heated Oxygen Sensor (HO2S) 2 Signal
65 BN - EVAP Canister Purge Valve Solenoid Control
66 BN - Ignition 3 Voltage
67 BK - Ground
68 WH - Engine Speed Signal
69-73 - - Not Used
74 D-BU - Throttle Position (TP) Sensor Signal
75 GY/BK - Manifold Absolute Pressure (MAP) Sensor Signal
76 YE - Engine Coolant Temperature (ECT) Sensor Signal
77 - - Not Used
78 RD - Intake Air Temperature (IAT) Sensor Signal
79 GY - 5-Volt Reference
80 - - Not Used
81 D-GN - Octane Selection Switch
82 - - Not Used
83 GY - Power Steering Pressure Switch Signal
84 YE - Rough Road Sensor Return
85 YE/BK - Low Reference
86-87 - - Not Used
88 PU - CAN Serial Data High
89 BN - Fuel Injector 4 Control
90 PK/BK - Fuel Injector 2 Control
Connector Part Information 
  • OEM: FC1
  • Service: N/A
  • Description: 90-Way Connector (BK)
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