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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) X1 (LSA) CONNECTOR END VIEW
2011 Cadillac CTS V, 2D Coupe, Standard

Engine Control Module (ECM) X1 (LSA) Connector End View

2011 Cadillac CTS V, 2D Coupe, StandardSECTION Engine Control Module (ECM) X1 (LSA) Connector End View
Fig 1: Engine Control Module (ECM) X1 (LSA) Connector End View
GM1590948Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X1 (LSA)

Pin Wire Circuit Function
1-6 - - Not Used
7 0.5 WH 17 Low Reference
8 - - Not Used
9 0.5 TN 2759 Fuel Tank Pressure Sensor Low Reference
10-11 - - Not Used
12 0.5 BN/WH 419 Malfunction Indicator Lamp (MIL) Control
13 0.5 D-GN/WH 465 Fuel System Control Module Signal Fuel Pump Relay Control - Primary
14-17 - - Not Used
18 0.5 D-BU 5985 Accessory Wakeup Serial Data
19 0.5 PK 339 Ignition 1 Voltage
20 0.5 RD/WH 340 Battery Positive Voltage
21-25 - - Not Used
26 0.5 YE 447 Starter Relay Coil Control
27-32 - - Not Used
33 0.35 WH/BK 1164 5-Volt Reference 2
34 0.5 GY 2709 Fuel Tank Pressure Sensor 5 Volt Reference
35 0.35 TN 1274 5-Volt Reference 1
36 0.35 BN 1271 Low Reference
37 0.35 PU 1272 Low Reference
38-39 - - Not Used
40 0.5 BN 5069 Main Relay Control
41-43 - - Not Used
44 0.5 D-BU 1936 Primary Fuel Level Sensor Signal
45 0.5 L-BU 1937 Secondary Fuel Level Sensor Signal
46 0.8 BN 7123 Supercharger Air Inlet Pressure Sensor Signal
47 0.35 D-BU 1161 Accelerator Pedal Position (APP) Sensor 1 Signal
48 0.5 D-GN 890 Fuel Tank Pressure (FTP) Sensor Signal
49 0.35 L-BU 1162 Accelerator Pedal Position (APP) Sensor 2 Signal
50-52 - - Not Used
53 0.5 D-GN/WH 459 A/C Compressor Clutch Relay Control
54 0.5 D-BU 473 High Speed Cooling Fan Relay Control
55 0.8 WH 1310 EVAP Canister Vent Solenoid Valve Control
56 - - Not Used
Connector Part Information 
  • Harness Type: Engine
  • OEM Connector: 12582680
  • Service Connector: 88988373
  • Description: 56-Way F MX123 34576 Series (BU)
Terminal Part Information 
  • Pins: 7, 33-37, 47, 49
  • 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: 9, 12, 13, 18-20, 26, 34, 40, 44-46, 48, 53-55
  • 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
RENDER: 1.0x

NO RELATED

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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.