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

Engine Control Module (ECM) X3 (LAT)

Fig 1: Engine Control Module (ECM) X3 (LAT) Connector End View
GM1590596Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X3 (LAT)

Pin Wire Circuit Function
1 - - Not Used
2 0.35 PK 1224 Automatic Transmission Fluid Pressure Switch Signal A
3-20 - - Not Used
21 0.5 TN 5514 Low Reference
22 - - Not Used
23 0.5 OG/BK 469 Low Reference
24 0.5 TN/BK 6033 Low Reference
25-32 - - Not Used
33 0.5 TN 2501 High Speed GMLAN Serial Data Bus-
34 - - Not Used
35 0.5 TN 2761 Low Reference
36 - - Not Used
37 0.5 GY 2700 5-Volt Reference 1
38 - - Not Used
39 0.5 GY 2704 5-Volt Reference 1
40 0.5 GY 6034 5-Volt Reference 1
41-45 - - Not Used
46 0.5 OG/BK 1786 Ignition Lock Cylinder Control Actuator Signal
47 - - Not Used
48 0.5 D-GN/BK 428 EVAP Canister Purge Solenoid Control
49 0.5 D-GN 335 Low Speed Engine Cooling Fan Relay Control
50-52 - - Not Used
53 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus+
54 - - Not Used
55 0.5 YE 410 Engine Coolant Temperature (ECT) Sensor Signal
56 - - Not Used
57 0.5 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
58 - - Not Used
59 0.5 L-GN 432 Manifold Absolute Pressure (MAP) Sensor Signal
60 0.5 YE 2034 Brake Master Cylinder Pressure Sensor Signal
61-64 - - Not Used
65 0.5 TN/BK 231 Engine Oil Pressure (EOP) Switch Signal
66-73 - - Not Used
Connector Part Information 
  • OEM: 12582678
  • Service: See Catalog
  • Description: 73-Way F 0.64 2.8 Series, Sealed (BK)
Terminal Part Information 
  • Pins: 2, 21, 23, 24, 33, 35, 37, 39, 40, 46, 48, 49, 53, 55, 57, 59, 60, 65
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • 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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