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

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

2011 Cadillac CTS V, 2D Coupe, StandardSECTION Engine Control Module (ECM) X1 (LLT) Connector End View
Fig 1: Engine Control Module (ECM) X1 (LLT) Connector End View
GM1826274Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X1 (LLT)

Pin Wire Circuit Function
1 0.75 L-GN 5282 Camshaft Phaser Exhaust Solenoid (1)
2 0.75 PU 5284 Camshaft Phaser Intake Solenoid (1)
3 1 PU/WH 4906 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 6
4 1 PU 4806 Direct Fuel Injector (DFI) High Voltage Control Cylinder 6
5 1 YE 7301 High Pressure Fuel Pump Actuator High Control
6 0.75 D-GN/WH 428 EVAP Canister Purge Solenoid Control
7 0.5 OG 5275 CMP Intake Sensor (1)
8 - - Not Used
9 0.5 PU 5274 CMP Exhaust Sensor (2)
10 0.5 OG 225 Generator Turn On Signal
11-12 - - Not Used
13 0.5 BN/WH 2130 Ignition Control Low Reference Bank 2
14 - - Not Used
15 0.5 GY 705 5-Volt Reference 2
16-23 - - Not Used
24 0.5 YE 581 TAC Motor Control - 1
25 0.8 WH/BK 5283 Camshaft Phaser Exhaust Solenoid (2)
26 1 D-GN 4803 Direct Fuel Injector (DFI) High Voltage Control Cylinder 3
27 1 D-GN/WH 4903 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 3
28 1 D-GN 4805 Direct Fuel Injector (DFI) High Voltage Control Cylinder 5
29 1 D-GN/WH 4905 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 5
30 0.5 GY 23 Generator Field Duty Cycle Signal
31-32 - - Not Used
33 0.5 YE 5276 CMP Intake Sensor (2)
34 0.5 D-GN 5273 CMP Exhaust Sensor
35 0.5 YE 573 CKP Sensor Signal
36 0.5 YE 2918 FRP Sensor Signal
37 - - Not Used
38 0.5 GY 598 5-Volt Reference 1
39 0.5 GY 2701 5-Volt Reference 3
40 0.5 GY 596 5-Volt Reference 1
41 0.5 BK 552 Low Reference
42 0.5 TN 808 Low Reference
43 0.5 TN 470 Low Reference
44 0.5 TN 476 Low Reference
45 0.5 GY 605 5-Volt Reference 3
46 0.5 TN 452 Low Reference
47 - - Not Used
48 0.5 BN 582 TAC Motor Control - 2
49 0.8 OG/BK 5272 Camshaft Phaser Intake Solenoid
50 1 L-BU 4804 Direct Fuel Injector (DFI) High Voltage Control Cylinder 4
51 1 BN 4801 Direct Fuel Injector (DFI) High Voltage Control Cylinder 1
52 1 D-BU 4802 Direct Fuel Injector (DFI) High Voltage Control Cylinder 2
53 1 D-BU/WH 4902 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 2
54 - - Not Used
55 0.5 PU 2121 IC 1 Control
56 0.5 L-BU 2123 IC 3 Control
57 0.5 D-GN 2125 IC 5 Control
58 - - Not Used
59 0.5 D-BU 496 Knock Sensor (KS) Signal
60 0.5 GY 2303 Knock Sensor (KS) Signal
61 0.5 TN/WH 331 Oil Pressure Sensor Signal
62-66 - - Not Used
64 0.5 OG/GN 7360 Manual Transmission Clutch Position Sensor Return (MV7)
67 0.5 TN/WH 3111 HO2S Low Reference - Bank 1 Sensor 1
68-69 - - Not Used
70 0.5 PU/WH 3210 HO2S Reference Voltage - Bank 2 Sensor 1
71 - - Not Used
72 0.75 L-GN 3212 HO2S Heater Low Control - Bank 2 Sensor 1
73 0.8 PU 7300 High Pressure Fuel Pump Actuator Low Control
74 1 L-BU/WH 4904 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 4
75 1 BN/WH 4901 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 1
76 0.5 PK/BK 5291 Ignition 1 Voltage
77 0.5 PK/BK 5292 Ignition 1 Voltage
78 - - Not Used
79 0.5 OG/WH 2122 IC 2 Control
80 0.5 D-GN/WH 2124 IC 4 Control
81 0.5 L-BU/WH 2126 IC 6 Control
82 0.5 YE 410 ECT Sensor Signal
83 0.5 GY 1716 Knock Sensor 1 Signal
84 0.5 L-BU 1876 Knock Sensor 2 Signal
85-87 - - Not Used
88 0.5 TN 2752 Low Reference
89 0.5 PU 486 TP Sensor 2 Signal
90 0.5 D-GN 485 TP Sensor 1 Signal
91 - - Not Used
92 0.5 PU/WH 3110 HO2S Reference Voltage - Bank 1 Sensor 1
93 0.5 TN/WH 3211 HO2S Low Reference - Bank 1 Sensor 1
94-95 - - Not Used
96 0.5 GY/WH 3113 Heater Low Control - Bank 1 Sensor 1
Connector Part Information 
  • Harness Type: Engine
  • OEM Connector: 1928404781
  • Service Connector: 19149311
  • Description: 96-Way F 120 MAT Series, 280 BDK Series, Sealed (BK) (BK)
Terminal Part Information 
  • Pins: 1, 2, 6, 10, 25, 30, 36, 38, 40, 42-44, 49, 61, 64, 76, 77, 82, 95
  • Terminated Lead: 13578933
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-16 (L-GN)
  • Terminal/Tray: 1928498135/19
  • Core/Insulation Crimp: J/J
  • Pins: 3-5, 26-29, 50-53, 73-75
  • Terminated Lead: 13575545
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-16 (L-GN)
  • Terminal/Tray: 1928498135/19
  • Core/Insulation Crimp: K/K
RENDER: 1.0x

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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.