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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 (LF1) CONNECTOR END VIEW
2011 Cadillac CTS V, 2D Coupe, Standard

Engine Control Module (ECM) X1 (LF1) Connector End View

2011 Cadillac CTS V, 2D Coupe, StandardSECTION Engine Control Module (ECM) X1 (LF1) Connector End View
Fig 1: Engine Control Module (ECM) X1 (LF1)
GM2470482Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X1 (LF1)

Pin Wire Circuit Function
1-3 - - Not Used
4 0.5 YE/WH 3200 Air Inlet Absolute Pressure Sensor
5 0.5 GY/WH 3201 5-Volt Reference 1
6 0.5 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
7-8 - - Not Used
9 0.5 D-GN 890 Fuel Tank Pressure Sensor Signal
10 0.5 GY 2709 5-Volt Reference 1
11-13 - - Not Used
14 0.5 WH/BK 1164 5-Volt Reference 4
15 0.5 D-BU 1161 APP Sensor 1 Signal
16-19 - - Not Used
20 0.5 TN/WH 3202 Low Reference
21 0.5 GY 2700 5-Volt Reference 1
22 0.5 TN 5514 Low Reference
23-24 - - Not Used
25 0.5 D-BU 1936 Primary Fuel Level Sensor Signal
26 0.5 TN 2759 Low Reference
27 0.5 L-BU 1937 Secondary Fuel Level Sensor Signal
28-29 - - Not Used
30 0.5 BN 1271 Low Reference
31 - - Not Used
32 0.5 D-GN/WH 459 A/C Compressor Clutch Relay Control
33 0.5 TN 1274 5-Volt Reference 3
34 0.5 L-BU 1162 APP Sensor 2 Signal
35-38 - - Not Used
39 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus+
40 0.5 TN 2501 High Speed GMLAN Serial Data Bus-
41 - - Not Used
42 0.5 D-BU 473 High Speed Cooling Fan Relay Control
43 - - Not Used
44 0.5 D-GN/WH 465 Fuel Pump Relay Control - Primary
45 - - Not Used
46 0.5 BN/WH 419 MIL Control
47 0.5 D-BU/WH 7361 5-Volt Reference 2 - Manual Transmission Clutch Position Sensor (MV7)
48 0.5 TN 6338 Manual Transmission Clutch Position Sensor Signal Position (MV7)
49-50 - - Not Used
51 0.5 PK 339 Ignition 1 Voltage
52 0.5 RD/WH 340 Battery Positive Voltage
53 0.5 PU 1272 Low Reference
54-56 - - Not Used
57 0.5 WH 17 Stop Lamp Switch Signal (MYA)
58 - - Not Used
59 0.5 D-GN 335 Low Speed Cooling Fan Relay Control
60-61 - - Not Used
62 0.5 PK/BK 5291 Ignition 1 Voltage
63 0.5 YE 447 Starter Relay Coil Control
64-65 - - Not Used
66 0.75 WH 1310 EVAP Canister Vent Solenoid Control
67 0.5 PK/BK 5292 Ignition 1 Voltage
68 0.5 OG/GN 7360 Manual Transmission Clutch Position Sensor Return (MV7)
69 - - Not Used
70 0.5 D-BU 5985 Accessory Wakeup Serial Data
71 - - Not Used
72 0.5 BN 5069 PWR/TRN Relay Control
73 2 PK/BK 5290 PWR/TRN Relay Voltage
Connector Part Information 
  • Harness Type: Engine
  • OEM Connector: 34566-0303
  • Service Connector: 13574782
  • Description: 73-Way F 0.64 2.8 Series, Sealed (BK with BU Terminal Position Assurance Lock)
Terminal Part Information 
  • Pins: 1-72
  • 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
  • Pin: 73
  • Terminated Lead: SEALED: 13576392 UNSEALED: 13575797
  • Release Tool: J-38125-11A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: 2/5
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.