2007 Saturn Ion Red LineFACTORY OEM SERVICE PROCEDURE

Powertrain Control Module (PCM) C1

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

Connector Part Information 
  • OEM: 15471388
  • Service: See Catalog
  • Description: 56-Way F Micro 64 Series Sealed (BU)
Terminal Part Information 
  • Pins: 6-8, 10, 12-20, 22, 24, 26, 27, 29-32, 34, 37, 38, 40, 41, 43, 44, 46-48, 51, 53, 54, 56
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)
Powertrain Control Module (PCM) C1 Terminal Identification

Pin Wire Color Circuit No. Function
1-5 - - Not Used
6 D-GN/WH 459 A/C Compressor Clutch Relay Control
7 BN 1271 Low Reference
8 PU 1272 Low Reference
9 - - Not Used
10 D-BU 473 High Speed Cooling Fan Relay Control
11 - - Not Used
12 PU 1589 Fuel Level Sensor Signal - Primary
13 PK/BK 5290 Ignition 1 Voltage
14 L-BU 6118 IAT 2 Sensor Signal
15 PU 1807 ECM Class 2 Serial Data
16 PU 1807 ECM Class 2 Serial Data
17 GY 2700 5-Volt Reference
18 BN 4 Accessory Voltage
19 YE 1139 Ignition 1 Voltage
20 OG 480 Battery Positive Voltage
21 - - Not Used
22 WH 1310 EVAP Canister Vent Solenoid Control
23 - - Not Used
24 D-GN 890 Fuel Tank Pressure Sensor Signal
25 - - Not Used
26 RD/BK 380 A/C Refrigerant Pressure Sensor Signal
27 D-BU 1161 APP Sensor 1 Signal
28 - - Not Used
29 BK 2759 Low Reference
30 WH/BK 1164 5-Volt Reference
31 WH 121 Engine Speed Signal
32 L-BU 20 Stop Lamp Supply Voltage/Stop Lamp Switch Signal
33 - - Not Used
34 PK 2014 Coolant Pump Relay Control
35-36 - - Not Used
37 D-GN/WH 465 Fuel Pump Relay Control - Primary
38 BN 5069 Main Relay Control
39 - - Not Used
40 BN/WH 419 MIL Control
41 L-BU 1162 APP Sensor 2 Signal
42 - - Not Used
43 TN 1274 5-Volt Reference
44 GY 1884 Cruise Control Set/Coast and Resume/Accelerate Switch Signal
45 - - Not Used
46 PU 420 TCC Brake Switch/Cruise Control Release Signal
47 GY 705 5-Volt Reference
48 YE 447 Starter Relay Coil Control
49-50 - - Not Used
51 D-GN 335 Low Speed Cooling Fan Relay Control
52 - - Not Used
53 BN/WH 379 CPP Switch Signal
54 D-GN 1433 PNP/Clutch Start Switch Signal
55 - - Not Used
56 BK 2751 Low Reference
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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