Engine Control Module Connector End Views. Chevrolet Joy 2008

For 1990-2009 cars

Connector 1: | Engine Control Module (ECM)

### Engine Control Module (ECM)

#### Connector Part Information

- OEM: FC1
- Service: N/A
- Description: 90-Way F (BK)

#### Engine Control Module (ECM)

Pin | Wire | Circuit | Function
--- | --- | --- | ---
1-2 | -- | -- | Not Used
3 | BK | 750 | Ground
4 | -- | -- | Not Used
5 | WH | 257 | Exhaust Gas Recirculation (EGR) Valve Control (EC2000/EC2500)
6 | D-GN/WH | 465 | Fuel Pump Relay Control
7 | GY/BK | 1029 | Main Relay Control
8 | D-GN/WH | 135 | Temperature Gage Signal
9 | D-BU | 473 | High Speed Cooling Fan Control
10 | D-GN | 335 | Low Speed Cooling Fan Control
11 | BK/WH | 951 | Shield Ground
12 | YE/BK | 457 | Knock Sensor (KS) Signal
13 | GY/BK | 720 | Low Reference
14 | PU/D-GN | 1980 | Heated Oxygen Sensor (HO2S) 2 Signal (EC2000/EC2500)
15 | -- | -- | Not Used
16 | BN/D-BU | 718 | Low Reference
17 | BN | 808 | Low Reference
18 | -- | -- | Not Used
19 | PK/BK | 632 | Low Reference
20-21 | -- | -- | Not Used
22 | BN/WH | 633 | Camshaft Position (CMP) Sensor Signal
23 | -- | -- | Not Used
24 | BK | 750 | Ground
25 | BK/WH | 1451 | Shield Ground
26 | -- | -- | Not Used
27 | GY | 2642 | Octane Selection Switch Signal (w/Octane Selection Switch)
BK | 750 | Ground (w/o Octane Selection Switch)
28 | BK | 750 | Ground
29 | PK/RD | 339 | Ignition 1 Voltage
30 | RD/BK | 1240 | Camshaft Position (CMP) Sensor Signal
31 | OG | 406 | Ignition Coil and 2 and 3 Control
32 | WH | 423 | Ignition Coil and 1 and 4 Control
33 | BK | 750 | Ground
34 | -- | -- | Not Used
35 | D-BU/WH | 1677 | Heated Oxygen Sensor (HO2S) 1 Heater Control (Euro Emissions and EC2000/EC2500)
36-38 | -- | -- | Not Used
39 | BN/WH | 419 | Malfunction Indicator Lamp (MIL) Control
40 | PU | 30 | Fuel Gage Signal
41 | D-GN/WH | 459 | A/C Clutch Relay Control
42 | D-BU | 496 | Knock Sensor (KS) Signal
43 | D-GN | 534 | Idle Motor Position Signal
44 | D-GN/PK | 412 | Heated Oxygen Sensor (HO2S) 1 Signal
45 | BN | 1456 | Exhaust Gas Recirculation (EGR) Valve Position Signal
46 | GY/YE | 596 | Fuel Sender Signal
47-48 | -- | -- | Not Used
49 | D-BU | 732 | Evaporator Temperature Sensor Signal
50 | GY | 474 | 5-Volt Reference
51 | BN/D-GN | 437 | Vehicle Speed Sensor (VSS) Signal
52 | D-GN/WH | 762 | A/C Request Signal
53 | WH | 1909 | Rough Road Signal (w/ABS)
WH | 1909 | Rough Road Signal (w/o ABS)
54 | D-BU/WH | 1869 | Crankshaft Position (CKP) Sensor Signal High
55 | PK | 427 | Idle Switch Position Signal
56 | PU | 1319 | Serial Data
57-58 | -- | -- | Not Used
59 | BN | 1744 | Fuel Injector 1 Control
60 | PK/BK | 1746 | Fuel Injector 3 Control
61 | L-BU | 425 | Idle Speed Motor Return
62 | D-BU | 426 | Idle Speed Motor Feed
63 | -- | -- | Not Used
64 | D-GN | 676 | Heated Oxygen Sensor (HO2S) 2 Heater Signal (EC2000/EC2500)
65 | D-GN/WH | 428 | EVAP Canister Purge Valve Solenoid Control
66 | OG/BK | 1733 | Ignition 1 Voltage
67 | BK | 750 | Ground
68 | WH | 121 | Tachometer Signal
69-73 | -- | -- | Not Used
74 | D-BU | 417 | Throttle Position (TP) Sensor Signal
75 | L-GN | 432 | Manifold Absolute Pressure (MAP) Sensor Signal
76 | YE | 410 | Engine Coolant Temperature (ECT) Sensor Signal
77 | -- | -- | Not Used
78 | BN | 472 | Intake Air Temperature (IAT) Sensor Signal
79 | GY | 2702 | 5-Volt Reference
80 | -- | -- | Not Used
81 | YE | 2643 | Octane Switch Signal (Euro 96 and US83 Emissions)
82 | -- | -- | Not Used
83 | OG/BK | 495 | Power Steering Pressure Switch Signal
84 | -- | -- | Not Used
85 | YE/BK | 1868 | Low Reference
86 | BN/WH | 312 | Headlamp Relay Control
87-88 | -- | -- | Not Used
89 | L-BU | 844 | Fuel Injector 4 Control
90 | L-GN/BK | 1745 | Fuel Injector 2 Control