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Engine Control Module (ECM) X2 (LFX)

WARNING: This page is about a different car, the 2016 Chevrolet Impala Limited. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) X2 (LFX) Connector End View
GM1968294Courtesy of GENERAL MOTORS COMPANY
Engine Control Module (ECM) X2 (LFX)

Pin Wire Circuit Function
1 0.5 BN/WH 6331 Air Pressure Sensor Signal (NU6)
2 0.5 WH 6452 Air Pressure Sensor 5-Volt Reference (NU6)
3 0.5 TN 808 Low Reference
4-9 - - Not Available
10 0.5 PU/WH 3110 HO2S Reference Voltage (Bank 1 Sensor 1)
11 0.5 PU/WH 3210 HO2S Reference Voltage (Bank 2 Sensor 1)
12 0.5 PU 3120 HO2S High Signal (Bank 1 Sensor 2)
13 0.5 PU 3220 HO2S High Signal (Bank 2 Sensor 2)
14 - - Not Available
15 0.35 PU 4008 Humidity Sensor Signal
16 0.5 BN 582 TAC Motor Control
17 0.5 D-BU/WH 6785 Low Reference (NU6)
18 0.5 GY 598 5-Volt 1 Reference
19 0.5 YE 2918 FRP Sensor Signal
20-25 - - Not Available
26 0.5 TN/WH 3111 HO2S Low Reference (Bank 1 Sensor 1)
27 0.5 TN/WH 3211 HO2S Low Reference (Bank 2 Sensor 1)
28 0.5 TN/WH 3121 HO2S Low Signal (Bank 1 Sensor 2)
29 0.5 TN 3221 HO2S Low Signal (Bank 2 Sensor 2)
30-31 - - Not Available
32 0.5 YE 581 TAC Motor Control
33 - - Not Available
34 0.5 GY 2701 5-Volt 4 Reference
35 - - Not Available
36 0.5 D-BU 496 Knock Sensor (KS) 1 Signal
37 0.5 L-BU 1876 Knock Sensor (KS) 2 Signal
38-40 - - Not Available
41 0.5 GY/WH 3113 HO2S Heater Low Control (Bank 1 Sensor 1)
42 0.5 GY/WH 3122 HO2S Heater Low Control (Bank 1 Sensor 2)
43 0.5 L-GN 432 MAP Sensor Signal
44 0.5 GY 2704 5-Volt 3 Reference
45-48 - - Not Available
49 0.35 L-BU 6289 Intake Air Temperature Sensor Signal
50 - - Not Available
51 0.35 D-GN/WH 428 EVAP Canister Purge Solenoid Control
52 0.35 YE 492 MAF Sensor Signal
53 0.5 OG 225 Charge Indicator Control/Charge Indicator Signal
54 0.5 TN 2752 Low Reference
55 0.5 GY 23 Generator Field Duty Cycle Signal
56 0.5 GY 1716 Knock Sensor (KS) 1 Signal
57 0.5 GY 2303 Knock Sensor (KS) 2 Signal
58 0..35 OG/BK 1786 Clutch Start Neutral Start Signal
59-60 - - Not Available
61 0.5 L-GN 3212 HO2S Heater Low Control (Bank 2 Sensor 1)
62 0.5 OG/WH 3223 HO2S Heater Low Control (Bank 2 Sensor 2)
63 0.5 OG/BK 469 Low Reference
64-68 - - Not Available
69 0.5 TN 2760 Low Reference
70 0.5 D-GN 485 TP Sensor 1 Signal
71-72 - - Not Available
73 2.5 BK/WH 451 Ground
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 15492323
  • Service Connector: 13574947
  • Description: 73-Way F 0.64/2.8 Series, Sealed (BK with BK Terminal Position Assurance Lock)
Terminal Part Information
  • Pins: 1-3, 10-13, 15-19, 26-29, 32, 34, 36, 37, 41-44, 49, 51-58, 61-63, 69, 70
  • Terminated Lead: 13575812
  • Release Tool: J-38125-12A
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0003
  • Core/Insulation Crimp: Not Available
  • Pin: 73
  • Terminated Lead: 13575797
  • Release Tool: J-38125-11A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
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