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Engine Control Module (ECM) X2 Connector End View

WARNING: This page is about a different car, the 2011 GMC Canyon and 2011 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) X2 Connector End View
GM1673472Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X2

Pin Wire Circuit Function
1 0.5 PU 2121 IC 1 Control
2 0.5 TN/WH 1653 HO2S Low Signal Sensor 1 (LLR or LLV)
0.5 TN 1664 HO2S Low Signal - Bank 1 Sensor 1 (LH9)
3 0.5 D-GN 1655 HO2S High Signal - Sensor 1 (LLR or LLV)
0.5 PU/WH 1665 HO2S High Signal - Bank 1 Sensor 1 (LH9)
4 0.5 PU/WH 1668 HO2S High Signal - Bank 1 Sensor 2 (LH9)
HO2S High Signal - Sensor 2 (LLR or LLV)
5 0.5 TN/WH 1669 HO2S Low Signal - Bank 1 Sensor 2 (LH9)
HO2S Low Signal - Sensor 2 (LLR or LLV)
6 0.8 L-BU 1876 Knock Sensor 2 Signal (LH9)
- - Not Available (LLR or LLV)
7 0.8 GY 2303 Knock Sensor 2 Signal (LH9)
- - Not Available (LLR or LLV)
8 0.8 D-BU 496 Knock Sensor 1 Signal (LH9)
0.35 L-BU 1876 Knock Sensor Signal (LLR or LLV)
9 0.8 GY 1716 Knock Sensor 1 Signal (LH9)
0.35 GY 2303 Knock Sensor Signal (LLR or LLV)
10 - - Not Available
11 0.5 YE 581 TAC Motor Control - 1
12 0.5 BN 582 TAC Motor Control - 2
13 0.5 PK 739 Ignition Voltage
14 0.5 BN 2198 CMP Actuator Solenoid Control (LLR or LLV)
0.35 PU 5284 CMP Actuator Solenoid Control (LH9)
15 - - Not Available
16 0.8 PK/BK 1746 Fuel Injector 3 Control (LH9)
- - Not Available (LLR or LLV)
17 0.5 PU/WH 2128 IC 8 Control (LH9)
0.5 L-BU 2123 IC 3 Control (LLR or LLV)
18 0.5 D-GN/WH 2124 IC 4 Control (LH9)
- - Not Available (LLR or LLV)
19 0.5 BN/WH 2130 Low Reference (LH9)
- - Not Available (LLR or LLV)
20-22 - - Not Available
23 0.5 OG 6260 Low Reference (LH9)
0.5 PK/BK 632 Low Reference (LLR or LLV)
24 0.5 BK 2755 Low Reference
25-26 - - Not Available
27 0.5 GY/BK 6272 Low Reference (LH9)
0.5 D-BU/WH 1869 Low Reference (LLR or LLV)
28 - - Not Available
29 0.35 BK 2752 Low Reference
30-31 - - Not Available
32 0.5 L-GN/BK 1745 Fuel Injector 2 Control (LH9)
0.5 L-BU/BK 844 Fuel Injector 4 Control (LLR or LLV)
33 0.5 RD 2127 IC 7 Control (LH9)
0.5 D-GN/WH 2124 IC 4 Control (LLV)
0.5 D-GN 2125 IC 5 Control (LLR)
34 0.5 D-GN 2125 IC 5 Control (LH9)
- - Not Available (LLR or LLV)
35 0.5 BN 2129 Low Reference (LH9)
- - Not Available (LLR or LLV)
36-38 - - Not Available
39 0.5 D-BU 6259 5-Volt Reference 1 (LH9)
0.35 RD 631 5-Volt Reference (LLR or LLV)
40 0.5 GY 2705 5-Volt Reference 1 (LH9)
- - Not Available (LLR or LLV)
41 - - Not Available
42 0.5 BK 2760 Low Reference
43 0.5 PU/WH 6270 5-Volt Reference (LH9)
0.5 L-GN 1867 5-Volt Reference (LLR or LLV)
44 0.5 GY 2701 5-Volt Reference
45 - - Not Available
46 0.35 BK 2199 Low Reference
47 - - Not Available
48 0.8 D-BU/WH 878 Fuel Injector 8 Control (LH9)
0.5 PK/BK 1746 Fuel Injector 3 Control (LLR or LLV)
49 0.8 BK/WH 845 Fuel Injector 5 Control (LH9)
- - Not Available (LLR or LLV)
50-51 - - Not Available
52 0.8 YE/BK 846 Fuel Injector 6 Control (LH9)
0.5 L-GN/BK 1745 Fuel Injector 2 Control (LLR)
53 0.5 RD/WH 2122 IC 2 Control (LH9)
0.5 OG/WH 2122 IC 2 Control (LLV)
0.5 D-GN/WH 2124 IC 4 Control (LLR)
54 0.5 L-BU/WH 2126 IC 6 Control (LH9)
0.5 RD/WH 2122 IC 2 Control (LLR)
55 0.5 L-BU 2123 IC 3 Control (LH9)
56-58 - - Not Available
59 0.5 D-BU/WH 6265 CMP Sensor Signal (LH9)
0.5 BK 630 Low Reference (LLR or LLV)
60 0.5 TN/WH 331 Oil Pressure Sensor Signal (LH9)
- - Not Available (LLR or LLV)
61 - - Not Available
62 0.5 L-BU 6289 IAT Sensor Signal
63 0.5 WH/BK 6271 CKP Sensor Signal (LH9)
0.35 YE/BK 1868 CKP Sensor Signal (LLR or LLV)
64 0.5 D-GN 485 TP Sensor 1 Signal
65 - - Not Available
66 0.5 PU 486 TP Sensor 2 Signal
67 0.5 YE 492 MAF Sensor Signal
68 0.5 BK/WH 3113 HO2S Heater Low Control - Bank 1 Sensor 1 (LH9)
0.5 D-GN 676 HO2S Heater High Control - Sensor 1 (LLR or LLV)
69 0.5 BK/WH 3122 HO2S Heater Low Control - Bank 1 Sensor 2 (LH9)
0.5 BK/WH 1423 HO2S Heater Low Control - Sensor 2 (LLR or LLV)
70 0.8 L-BU/BK 844 Fuel Injector 4 Control (LH9)
- - Not Available (LLR or LLV)
71 0.8 RD/BK 877 Fuel Injector 7 Control (LH9)
0.5 L-BU/BK 844 Fuel Injector 4 Control (LLV)
0.5 BK/WH 845 Fuel Injector 5 Control (LLR)
72 0.5 BK 1744 Fuel Injector 1 Control
73 2 BK/WH 451 Ground
Connector Part Information 
  • Harness: Engine
  • OEM: 13711077 (LH9)
  • OEM: 13600010 (LLR or LLV)
  • Service: Pending
  • Description: 73-Way F MX123 34566 Series, Sealed (BK) with (BK) Case
Terminal Part Information 
  • Pins: 1(LLR or LLV), 8(LLR or LLV), 9(LLR or LLV), 14, 17(LLR or LLV), 23(LLR or LLV), 27(LLR or LLV), 29, 33(LLR or LLV), 39(LLR or LLV), 43(LLR or LLV), 44, 46, 53(LLR or LLV), 54(LLR or LLV), 59(LLR or LLV), 63(LLR or LLV), 64, 66
  • 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: 1(LH9), 2- 7, 8(LH9), 9(LH9), 11- 13, 16, 17(LH9), 18, 19, 23(LH9), 24, 27(LH9), 32, 33(LH9), 34, 35, 39(LH9), 40, 42, 43(LH9), 48, 49, 52, 53(LH9), 54(LH9), 55, 59(LH9), 60, 62, 63(LH9), 67- 72
  • Terminated Lead: Pending
  • Release Tool: Pending
  • Diagnostic Test Probe: Pending
  • Terminal/Tray: Pending
  • Core/Insulation Crimp: Not Available
  • 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: 2/5
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