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Home >> Hummer >> 2008 >> H3 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 118 (Wiring Systems And Power Management - Component Views & Component Connector End Views) >> Component Connector End Views >> Engine Control Module (ECM) X1 (LZ4)

Engine Control Module (ECM) X1 (LZ4)

WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) X1 (LZ4) Connector End View
GM1650395Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X1 (LZ4)

Pin Wire Circuit Function
1 0.35 OG/BK 1786 Park/Neutral Signal
2-8 - - Not Used
9 0.35 WH 17 Stop Lamp Supply Voltage
10 0.35 PU 3120 HO2S High Signal (Bank 1 Sensor 2)
11 0.35 TN/WH 3121 HO2S Low Signal (Bank 1 Sensor 2)
12 0.35 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
13 0.35 TN 5514 Low Reference
14-15 - - Not Used
16 0.35 PU 1589 Fuel Level Sensor Signal
17 0.35 D-BU 473 High Speed Cooling Fan Relay Control
18 0.35 BN 4 Accessory Voltage
19 0.35 PK 639 Ignition 1 Voltage
20 0.35 RD/WH 540 Battery Positive Voltage
21-22 - - Not Used
23 0.35 PU 1272 Low Reference
24 0.35 D-GN 890 Fuel Tank Pressure Sensor Signal
25-26 - - Not Used
27 0.35 TN 2501 High Speed GMLAN Serial Data Bus-
28 0.35 TN/BK 2500 High Speed GMLAN Serial Data Bus+
29 0.35 D-BU 1161 APP Sensor 1 Signal
30 0.35 BN 1271 Low Reference
31 0.35 OG/BK 1057 Low Reference
32 0.35 L-BU 1162 APP Sensor 2 Signal
33 0.35 GY 705 5-Volt Reference 1
34 0.35 GY 2700 5-Volt Reference 1
35 - - Not Used
36 0.35 TN 1274 5-Volt Reference 1
37 0.35 TN 472 IAT Sensor Signal
38 0.35 TN/BK 2760 Low Reference
41 0.35 YE 492 MAF Sensor Signal
42-46 - - Not Used
47 0.8 PK/BK 5290 Ignition 1 Voltage
48 0.35 BN 818 Vehicle Speed Signal
49 0.35 TN 3221 HO2S Low Signal (Bank 2 Sensor 2)
50 0.35 D-GN/WH 465 Fuel Pump Relay Control
51 - - Not Used
52 0.35 PU/WH 6386 Starter Relay Coil Control
53-55 - - Not Used
56 0.35 WH/BK 1164 5-Volt Reference 2
57 - - Not Used
58 0.35 D-GN 335 Low Speed Cooling Fan Relay Control
59 0.35 BN 5069 Main Relay Control
60 0.35 TN 2759 Low Reference
61 0.35 WH 1310 EVAP Canister Vent Solenoid Control
62 - - Not Used
63 0.35 D-GN/WH 459 A/C Compressor Clutch Relay Control
64 0.35 OG/WH 3223 HO2S Heater Low Control (Bank 2 Sensor 2)
65 0.35 GY/WH 3122 HO2S Heater Low Control (Bank 2 Sensor 1)
66-67 - - Not Used
68 0.35 BN/WH 419 MIL Control
69 0.35 PU 3220 HO2S High Signal (Bank 2 Sensor 2)
70-72 - - Not Used
73 2 BK 451 Ground
Connector Part Information 
  • OEM: 13542537
  • Service: See Catalog
  • Description: 73-Way F MX123 34566 Series Sealed (BK)
Terminal Part Information 
  • Pins: 1, 9, 12-13, 16-20, 23-24, 27-34, 36, 48, 50, 52, 56, 58-61, 63-65, 68
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 10-11, 37-38, 41, 47, 49, 69
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins 10, 11, 47, 49, 69 - K/K
  • Core/Insulation Crimp: Pins 37, 38, 41 - J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 73
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: 2/5
  • Release Tool/Test Probe: 12094430/J-35616-35 (VT)
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