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HOMESERVICE MANUALSCADILLAC2011CTS V, 2D COUPE, STANDARDREPAIR AND DIAGNOSISELECTRICALWIRING DIAGRAMSWIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - DOOR HANDLE SWITCH THROUGH FOG LAMPCOMPONENT CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) X3 (LSA) CONNECTOR END VIEW
2011 Cadillac CTS V, 2D Coupe, Standard

Engine Control Module (ECM) X3 (LSA) Connector End View

2011 Cadillac CTS V, 2D Coupe, StandardSECTION Engine Control Module (ECM) X3 (LSA) Connector End View
Fig 1: Engine Control Module (ECM) X3 (LSA) Connector End View
GM1590596Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X3 (LSA)

Pin Wire Circuit Function
1-2 - - Not Used
3 0.5 TN 1667 HO2S Low Signal - Bank 2 Sensor 1
4 0.5 PU 1666 HO2S High Signal - Bank 2 Sensor 1
5 0.5 PU 1670 HO2S High Signal - Bank 2 Sensor 2
6 0.5 TN 1671 HO2S Low Signal - Bank 2 Sensor 2
7 0.5 OG 225 Generator Turn On Signal
8 0.5 L-GN 1652 Reverse Lockout Solenoid Signal (MG9)
9-12 - - Not Used
13 0.5 GY 587 Skip Shift Signal (MG9)
14 0.35 L-BU 7126 Super Charger Vacuum Bypass Valve Control
15 0.5 L-GN 3212 HO2S Heater Low Control - Bank 2 Sensor 1
16 0.5 PK 2014 Charge Air Cooler Coolant Pump Control
17 - - Not Used
18 0.8 BN 1174 Oil Level Switch Signal
19-20 - - Not Used
21 0.5 TN 5514 A/C Refrigerant Pressure Sensor Low Reference
22 0.8 OG/BK 6014 Barometric Pressure Sensor Low Reference
23 0.8 OG/BK 469 Manifold Absolute Pressure Sensor Low Reference
24-26 - - Not Used
27 0.5 OG/D-GN 7360 Manual Transmission Clutch Position Sensor Return (MG9)
28 - - Not Used
29 0.5 GY 23 Generator Field Duty Cycle Signal
30-32 - - Not Used
33 0.5 TN 2501 High Speed GMLAN Serial Data Bus-
34 0.5 TN 470 Sensor Low Reference
35 0.8 TN 2761 Coolant Temperature Sensor Low Reference
36 0.8 YE/BK 6120 Manifold Air Temperature Sensor Low Reference
37 0.5 GY 2700 A/C Pressure Sensor 5 Volt Reference
38 0.8 WH/BK 2932 Barometric Pressure Sensor (5) Volt Reference
39 0.8 GY 2704 Manifold Absolute Pressure Sensor 5 Volt Reference
40-42 - - Not Used
43 0.5 D-BU/YE 7361 Manual Transmission Clutch Position Sensor Supply (MG9)
44 - - Not Used
45 0.35 L-GN 5007 Backup Lamp Switch Signal (MG9)
46 0.5 OG/BK 1786 Ignition Lock Cylinder Control Actuator Signal (MYD)
47 - - Not Used
48 0.5 D-GN/WH 428 EVAP Canister Purge Solenoid Control
49 0.5 D-GN 335 Low Speed Cooling Fan Relay Control
50 0.5 OG/WH 3223 HO2S Heater Low Control - Bank 2 Sensor 2
51-52 - - Not Used
53 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus+
54 - - Not Used
55 0.8 YE 410 Engine Coolant Temperature Sensor Signal
56 0.8 L-BU 6118 Manifold Air Temperature Sensor Signal
57 0.5 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
58 0.8 GY/BK 433 Barometric Pressure Sensor Signal
59 0.8 L-GN 432 Manifold Absolute Pressure Sensor Signal
60-62 - - Not Used
63 0.5 L-GN 6338 Manual Transmission Clutch Position Sensor Signal Position (MG9)
64-65 - - Not Used
66 0.35 YE 400 Vehicle Speed Sensor Signal
67 0.35 PU 401 Vehicle Speed Sensor Low Reference
68-72 - - Not Used
73 3.0 BK 1550 Ground
Connector Part Information 
  • Harness Type: Engine
  • OEM Connector: 12582678
  • Service Connector: 88988372
  • Description: 73-Way F 0.64 2.8 Series, Sealed (BK)
Terminal Part Information 
  • Pins: 3-8, 13, 15, 16, 18, 21, 27, 29, 33, 34, 37, 43, 46, 48-50, 53, 57, 63
  • Terminated Lead: 13575575
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Pins: 14, 45, 66, 67
  • Terminated Lead: 13575811
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Pins: 22, 23, 35, 36, 38, 39, 55, 56, 58, 59, 65
  • Terminated Lead: 13575575
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: K/K
  • Pins: 73
  • Terminated Lead: Pending
  • Release Tool: J-38125-11A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
RENDER: 1.0x

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  • • 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.