LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2009 >> Escalade ESV AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 651 (Wiring Systems And Power Management - Component Connector End Views - Electronic Compass Module To Memory Seat Module (X4)) >> Component Connector End Views >> Engine Control Module (ECM) X2 (HP2)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Engine Control Module (ECM) X2 (HP2)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
GM1590596Courtesy of
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 15499466
  • Service Connector: 88988931
  • Description: 73-Way F MX123 Series, Sealed (BK)
Terminal Part Information
  • Pins: 1-9, 11-13, 16-19, 24, 28, 32-35, 40, 42, 48, 49, 52-55, 60, 62, 67-72
  • Terminated Lead: Service by Harness - See Part Catalog
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins: 1-5, 11-13, 16-19, 24, 28, 32-35, 40, 42, 48, 49, 52-55, 60, 62, 67-72 - J/J
  • Core/Insulation Crimp: Pins 6-9 - K/K
  • Pins: 14, 23, 27, 29, 39, 43, 44, 46, 59, 63, 64, 66
  • Terminated Lead: Service by Harness - See Part Catalog
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Pins: 73
  • Terminated Lead: 13576375
  • Release Tool: J-38125-11A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
Engine Control Module (ECM) X2 (HP2)

Pin Wire Circuit Function
1 0.5 PU 2121 Ignition Coil 1 Control
2 0.5 TN 1664 HO2S Low Signal - Bank 1 Sensor 1
3 0.5 PU/WH 1665 HO2S High Signal - Bank 1 Sensor 1
4 0.5 PU/WH 1668 HO2S High Signal - Bank 1 Sensor 2
5 0.5 TN/WH 1669 HO2S Low Signal - Bank 1 Sensor 2
6 0.8 L-BU 1876 Knock Sensor 2 Signal
7 0.8 GY 2303 Knock Sensor 2 Signal
8 0.8 D-BU 496 Knock Sensor 1 Signal
9 0.8 GY 1716 Knock Sensor 1 Signal
10 - - Not Used
11 0.5 YE 581 TAC Motor Control - 1
12 0.5 BN 582 TAC Motor Control - 2
13 0.5 PK 1339 Ignition Voltage
14 0.35 PU 5284 Cam Phasor Control
15 - - Not Used
16 0.5 PK/BK 1746 Fuel Injector 3 Control
17 0.5 PU/WH 2128 Ignition Coil 8 Control
18 0.5 D-GN/WH 2124 Ignition Coil 4 Control
19 0.5 BN/WH 2130 Low Reference
20-22 - - Not Used
23 0.35 BN 6266 Low Reference
24 0.5 BK 2755 Low Reference
25-26 - - Not Used
27 0.35 GY/BK 6272 Low Reference
28 0.5 PK/BK 1339 Ignition Voltage
29 0.35 TN 2752 Low Reference
30-31 - - Not Used
32 0.5 L-GN/BK 1745 Fuel Injector 2 Control
33 0.5 OG 2127 Ignition Coil 7 Control
34 0.5 D-GN 2125 Ignition Coil 5 Control
35 0.5 BN 2129 Low Reference
36-38 - - Not Used
39 0.35 D-BU 6259 5-Volt Reference 1
40 0.5 GY 2705 5-Volt Reference 1
41 - - Not Used
42 0.5 TN 2760 Low Reference
43 0.35 PU/WH 6270 5-Volt Reference 2
44 0.35 GY 2701 5-Volt Reference 2
45 - - Not Used
46 0.35 TN 2199 Low Reference
47 - - Not Used
48 0.5 D-BU/WH 878 Fuel Injector 8 Control
49 0.5 TN/WH 845 Fuel Injector 5 Control
50-51 - - Not Used
52 0.5 YE/BK 846 Fuel Injector 6 Control
53 0.5 OG/WH 2122 Ignition Coil 2 Control
54 0.5 L-BU/WH 2126 Ignition Coil 6 Control
55 0.5 L-BU 2123 Ignition Coil 3 Control
56-58 - - Not Used
59 0.35 D-BU/WH 6265 Camshaft Position Sensor Signal
60 0.5 TN/WH 331 Oil Pressure Sensor Signal
61 - - Not Used
62 0.5 TN 472 Intake Air Temperature (IAT) Sensor Signal
63 0.35 WH/BK 6271 Crankshaft Position Sensor Signal
64 0.35 D-GN 485 Throttle Position Sensor 1 Signal
65 - - Not Used
66 0.35 PU 486 Throttle Position Sensor 2 Signal
67 0.5 YE 492 Mass Air Flow (MAF) Sensor Signal
68 0.5 GY/WH 3113 HO2S Heater Low Control - Bank 1 Sensor 1
69 0.5 GY/WH 3122 HO2S Heater Low Control - Bank 2 Sensor 1
70 0.5 L-BU/BK 844 Fuel Injector 4 Control
71 0.5 OG/BK 877 Fuel Injector 7 Control
72 0.5 TN 1744 Fuel Injector 1 Control
73 3 BK/WH 451 Ground
scientia non olet · About LEMON Manuals