2004 Saturn Ion Red LineFACTORY OEM SERVICE PROCEDURE

Engine Control Module (ECM) Connector End Views

WARNING: This page is about a different car, the 2005 Saturn Ion 3, 2005 Saturn Ion 2, and 2005 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.
ECM C1

GM1228485Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15452125
  • 56-Way F Micro 64 Sealed (BU)
Pin Wire Color Circuit No. Function
1 PU 1589 Fuel Level Sensor Signal
2 L-BU 1162 APP Sensor 2 Signal
3 D-GN 890 Fuel Tank Pressure Sensor Signal
4 D-BU 1161 APP Sensor 1 Signal
5 - - Not Used
6 D-GN 1433 PNP/Clutch Start Switch Signal
7 - - Not Used
8 BN/WH 379 CPP Switch Signal
9 PU 420 TCC Brake Switch/Cruise Control Release Signal
10 WH/BK 1164 5-Volt Reference
11 L-BU 20 Stop Lamp Switch Signal
12 BN 4 Accessory Voltage
13 GY 705 5-Volt Reference
14 D-GN/WH 465 Fuel Pump Relay Control
15 D-BU 1884 Cruise Control Switch Signal
16 PU 1807 Class 2 Serial Data
17 PU 1807 Class 2 Serial Data (ABS)
18 BN 5069 Main Relay Control
19-26 - - Not Used
27 YE 1139 Ignition 1 Voltage
28-29 - - Not Used
30 WH 1310 EVAP Canister Vent Solenoid Control
31 D-GN/WH 459 A/C Compressor Clutch Relay Control
32-40 - - Not Used
41 PU 1272 Low Reference
42-44 - - Not Used
45 BN/WH 419 MIL Control
46 YE 447 Starter Relay Coil Control
47-50 - - Not Used
51 OG 480 Battery Positive Voltage
52 - - Not Used
53 BN 1271 Low Reference
54 BK 2759 Low Reference
55 - - Not Used
56 TN 1274 5-Volt Reference
ECM C2

GM1332467Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15471389 (MN5)
  • 15471385 (M86)
  • 73-Way F GT 280 Micro 64 Sealed (BK)
Pin Wire Color Circuit No. Function
1-2 - - Not Available
3 YE 581 TAC Motor Control - 1
4 - - Not Available
5 BN 582 TAC Motor Control - 2
6-9 - - Not Available
10 BK 1744 Fuel Injector 1 Control
11 PK/BK 1746 Fuel Injector 3 Control
12 L-BU/BK 844 Fuel Injector 4 Control
13 L-GN/BK 1745 Fuel Injector 2 Control
14 - - Not Available
15 D-GN/WH 428 EVAP Canister Purge Solenoid Control
16 - - Not Available
17 BK/WH 1423 HO2S Heater Low Control - 1
18 YE 400 Signal High - Front/VSS High Signal/OSS High Signal (M/T)
- - Not Available (A/T)
19 PU 401 Signal Low - Front VSS Low Signal/OSS Low Signal (M/T)
- - Not Available (A/T)
20-23 - - Not Available
24 GY 2701 5-Volt Reference
25 GY 2704 5-Volt Reference
26 L-BU/BK 1688 5-Volt Reference
27 - - Not Available
28 GY 2700 5-Volt Reference (C60)
29 BK/WH 1704 Low Reference
30 - - Not Available
31 BK 2752 Low Reference
32-33 - - Not Available
34 PK/BK 5290 Ignition 1 Voltage
35 - - Not Available
36 PU 486 TP Sensor 2 Signal
37 - - Not Available
38 BK 2760 Low Reference
39 - - Not Available
40 OG/BK 469 Low Reference
41 PU 1666 HO2S High Signal - 1
42 TN 1667 HO2S Low Signal - 1
43 PU/WH 1668 HO2S High Signal - 2
44 TN/WH 1669 HO2S Low Signal - 2
45-46 - - Not Availble
47 D-GN 335 Low Speed Cooling Fan Relay Control
48 TN/BK 231 Oil Pressure Switch Signal
49 RD/BK 380 A/C Refrigerant Pressure Sensor Signal (C60)
50 YE 410 ECT Sensor Signal
51 GY 23 Generator Field Duty Cycle Signal
52 YE 492 MAF Sensor Signal
53 D-GN 676 HO2S Heater Low Control - 1
54 WH 423 IC Timing Control
55 OG 406 IC Timing Control (B)
56-57 - - Not Available
58 D-GN 485 TP Sensor 1 Signal
59 BK 2751 Low Reference (C60)
60 - - Not Availble
61 BK 2761 Low Reference
62 L-GN 432 MAP Sensor Signal
63 RD 225 Generator Turn On Signal
64 TN/WH 2500 High Speed GMLAN Serial Data Bus +
65 TN 2501 High Speed GMLAN Serial Data Bus -
66 YE 573 CKP Sensor Signal
67 PU 574 Low Reference
68 TN 472 IAT Sensor Signal
69 - - Not Available
70 BN/WH 633 CMP Sensor Signal
71 GY 1716 Low Reference
72 D-BU 496 Knock Sensor Signal
73 BK/WH 451 Ground
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  • • 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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