2009 Saturn Vue XR, 3.6 7, AWDFACTORY OEM SERVICE PROCEDURE

Engine Control Module (ECM) X2 (LAT)

Fig 1: Engine Control Module (ECM) X2 (LAT) Connector End View
GM1590592Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X2 (LAT)

Pin Wire Circuit Function
1 0.5 PU 2121 Ignition Coil 1 Control
2 0.5 TN/WH 3111 HO2S Low Signal Sensor 1
3 0.5 PU/WH 3110 HO2S High Signal Sensor 1
4 0.5 PU 3120 HO2S High Signal Sensor 2
5 0.5 TN/WH 3121 HO2S Low Signal Sensor 2
6-7 - - Not Used
8 0.5 D-BU 496 Knock Sensor (KS) 1 Signal
9 0.5 GY 1716 Knock Sensor (KS) 1 Signal
10 - - Not Used
11 0.5 YE 581 Throttle Actuator Control (TAC) Motor Control - 1
12 0.5 BN 582 Throttle Actuator Control (TAC) Motor Control - 2
13 0.8 PK/BK 6341 Ignition 1 Voltage
14 0.5 PU 5284 Camshaft Position (CMP) Actuator Solenoid Valve - Bank 1 Intake Control
15-16 - - Not Used
17 0.5 L-BU 2123 Ignition Coil 3 Control
18-19 - - Not Used
20 0.5 PU 6267 Low Reference
21-22 - - Not Used
23 0.5 BN 6266 Low Reference
24-26 - - Not Used
27 0.5 PU 574 Low Reference
28 - - Not Used
29 0.5 TN 2752 Low Reference
30 0.5 BN/WH 6754 Low Reference
31 - - Not Used
32 0.5 L-GN/BK 1745 Fuel Injector 2 Control
33 0.5 D-GN/WH 2124 Ignition Coil 4 Control
34 - - Not Used
35 0.5 BN 2129 Low Reference
36 0.5 D-GN 6457 5-Volt Reference 1
37-38 - - Not Used
39 0.5 D-BU 6259 5-Volt Reference 1
40-41 - - Not Used
42 0.5 TN 2760 Low Reference
43 0.5 L-GN 2867 5-Volt Reference 2
44 0.5 GY 2701 5-Volt Reference 2
45 - - Not Used
46 0.5 BN 6753 Low Reference
47 - - Not Used
48 0.5 PK/BK 1746 Fuel Injector 3 Control
49 - - Not Used
50 0.5 L-GN 5282 Camshaft Position (CMP) Actuator Solenoid Valve - Bank 1 Exhaust Control
51-52 - - Not Used
53 0.5 OG/WH 2122 Ignition Coil 2 Control
54-55 - - Not Used
56 0.5 D-GN/WH 6264 Camshaft Position (CMP) Sensor - Exhaust Signal
57-58 - - Not Used
59 0.5 D-BU/WH 6265 Camshaft Position (CMP) Sensor - Intake Signal
60-61 - - Not Used
62 0.5 L-BU 6289 Intake Air temperature (IAT) Sensor Signal
63 0.5 YE 573 Crankshaft Position (CKP) Sensor Signal
64 0.5 D-GN 485 Throttle Position (TP) Sensor 1 Signal
65 - - Not Used
66 0.5 PU 486 Throttle Position (TP) Sensor 2 Signal
67 0.5 YE 492 Mass Air Flow (MAF) Sensor Signal
68 0.5 GY/WH 3113 HO2S Heater Low Control Sensor 1
69 0.5 GY/WH 3122 HO2S Heater Low Control Sensor 2
70 - - Not Used
71 0.5 L-BU/BK 844 Fuel Injector 4 Control
72 0.5 TN 1744 Fuel Injector 1 Control
73 3 BK/WH 251 Ground
Connector Part Information 
  • OEM: 12582677
  • Service: See Catalog
  • Description: 73-Way F 0.64 2.8 Series, Sealed (BK)
Terminal Part Information 
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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