2006 Chevrolet Cobalt SS, 4D Sedan, StandardFACTORY OEM SERVICE PROCEDURE

Engine Control Module (ECM) C1

Fig 1: Powertrain Control Module (PCM) C1 Connector End View
GM1228485Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) C1 Connector & Terminal Parts Information

Connector Part Information 
  • OEM: 15492320
  • Service: 88988821
  • Description: 56-Way F Micro 64 Series Sealed (BU)
Terminal Part Information 
  • Pins: 16, 35, 37, 41
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
  • Pins: 2, 6, 19, 20, 55
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 7, 9, 12, 13, 18, 33, 34, 36, 40, 44, 47, 48, 49, 53, 54, 56
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) C1 Terminal Identification

Pin Wire Color Circuit No. Function
1 - - Not Used
2 PU 420 TCC Brake Switch/Cruise Control Release Signal
3-5 - - Not Used
6 BN/WH 379 CPP Switch Signal
7 L-BU 20 Stop Lamp Switch Signal
8 - - Not Used
9 TN 2759 Low Reference
10-11 - - Not Used
12 BN/WH 419 MIL Control
13 D-GN/WH 465 Fuel Pump Relay Control
14-15 - - Not Used
16 PU 16 VSS Low Signal
17 - - Not Used
18 BN 4 Accessory Voltage
19 PK/BK 1039 Ignition 1 Voltage
20 RD/WH 840 Battery Positive Voltage
21-32 - - Not Used
33 WH/BK 1164 5-Volt Reference - 1
34 GY 2709 5-Volt Reference - 1
35 PU 1272 5-Volt Reference - 1
36 BN 1271 Low Reference
37 tn 1274 Low Reference
38-39 - - Not Used
40 BN 5069 Powertrain relay Control
41 YE 400 VSS High Signal
42-43 - - Not Used
44 PU 1589 Fuel Level Sensor Signal
44-46 - - Not Used
47 D-BU 1161 APP Sensor 1 Signal
48 D-GN 890 Fuel Tank Pressure Sensor Signal
49 L-BU 1162 APP Sensor 2 Signal
50-52 - - Not Used
53 D-GN/WH 459 A/C Compressor Clutch Relay Control
54 D-BU 473 High Speed Cooling Fan Relay Control
55 WH 1310 EVAP Canister Vent Solenoid Control
56 YE 447 Starter Relay Coil Control
Factory Service Tools

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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.

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