From EvoEcu
The USDM Evo IX ECU uses a three-plug harness, with three rows of pins for each plug. The factory service manual refers to these plugs as C-121, C-119, and C-117.
PCB Pictures
Front, Back
Complete harness - 93-pin interface
Pins 1, 2, 9, 10, 24, 25, 46, 47, 58, 59, 67, 68, 76, 77, 89, 90, 99, and 100 are the "large" variety (so, 6 per plug, or 18 total pins are large), and the remainder (29, 22, and 24 pins for each plug, or 75 total) are the "small" type. The large pins have been colored in yellow in the diagrams below.
| C-121 | C-119 | C-117
|
| 1 | 2 | | 3 | 4 | | JAE | | 5 | 6 | | 7 | 8
|
| 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23
|
| 24 | 25 | | 26 | 27 | 28 | 29 | | 30 | 31 | 32 | 33 | | 34 | 35
|
|
| 41 | 42 | 43 | 44 | | | | 45 | 46 | 47
|
| 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59
|
| 60 | 61 | | 62 | 63 | 64 | | 65 | 66 | | 67 | 68
|
|
| 71 | 72 | | 73 | 74 | | JAE | | 75 | 76 | 77
|
| 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90
|
| 91 | 92 | 93 | | 94 | 95 | | 96 | 97 | 98 | | 99 | 100
|
|
C-121 - 35-pin connector
| 1 | 2 | | 3 | 4 | | JAE | | 5 | 6 | | 7 | 8
|
| 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23
|
| 24 | 25 | | 26 | 27 | 28 | 29 | | 30 | 31 | 32 | 33 | | 34 | 35
|
| Pin | Description
|
| 1 | Injector #1
|
| 2 | Injector #4
|
| 3 | Front O2 heater control
|
| 4 |
|
| 5 |
|
| 6 | Exhaust gas recirculation solenoid relay control, ground
|
| 7 |
|
| 8 | Alternator voltage regulator, ground
|
| 9 | Injector #2
|
| 10 |
|
| 11 | Ignition coil, cylinder #1 and #4
|
| 12 | Ignition coil, cylinder #2 and #3
|
| 13 |
|
| 14 | Idle stepping motor (A)
|
| 15 | Idle stepping motor (B)
|
| 16 | Evaporative purge solenoid relay control, ground
|
| 17 |
|
| 18 | Cooling fan relay control, ground
|
| 19 | AFS active filter (MAF signal filter?)
|
| 20 | A/C compressor clutch relay control, ground
|
| 21 | Fuel pump relay control, ground
|
| 22 | Check-engine light control, ground
|
| 23 |
|
| 24 | Injector #3
|
| 25 |
|
| 26 | Rear O2 heater control
|
| 27 |
|
| 28 | Idle stepping motor (C)
|
| 29 | Idle stepping motor (C)
|
| 30 | A/C condenser fan relay control, high
|
| 31 | A/C condenser fan relay control, low
|
| 32 | MIVEC valve control
|
| 33 |
|
| 34 | General sensor ground
|
| 35 | Evaporative ventilation solenoid relay control, ground
|
C-119 - 28-pin connector
| 41 | 42 | 43 | 44 | | | | 45 | 46 | 47
|
| 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59
|
| 60 | 61 | | 62 | 63 | 64 | | 65 | 66 | | 67 | 68
|
| Pin | Description
|
| 41 | Wastegate solenoid relay control, ground
|
| 42 | Throttle position sensor power (+5V)
|
| 43 | Crankshaft position sensor signal
|
| 44 | Coolant temperature sensor signal
|
| 45 | Engine speed (RPM)
|
| 46 | Chassis ground
|
| 47 | 12V power (through MFI relay)
|
| 48 | Fuel pressure solenoid control, ground
|
| 49 | Sensor ground (O2, MAP, air temp, coolant, TPS)
|
| 50 | Exhaust camshaft position sensor signal
|
| 51 | MAF barometric pressure sensor signal
|
| 52 | Alternator voltage regulator signal
|
| 53 | Intake camshaft position sensor signal
|
| 54 | Power steering pressure sensor signal
|
| 55 | Fuel pump relay control, ground
|
| 56 |
|
| 57 | MFI relay control, ground
|
| 58 | Chassis ground
|
| 59 | 12V power (through MFI relay)
|
| 60 | 12V power (backup ECU power, wired directly from battery)
|
| 61 | MAF sensor signal
|
| 62 | Intake air temperature sensor signal
|
| 63 |
|
| 64 | Aftermarket use: ADC 0F, typically used for map switching in TephraMod
|
| 65 | Air conditioning control
|
| 66 |
|
| 67 |
|
| 68 | Starter relay signal
|
C-117 - 30-pin connector
| 71 | 72 | | 73 | 74 | | JAE | | 75 | 76 | 77
|
| 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90
|
| 91 | 92 | 93 | | 94 | 95 | | 96 | 97 | 98 | | 99 | 100
|
| Pin | Description
|
| 71 | Front O2 sensor signal
|
| 72 |
|
| 73 | Rear O2 sensor signal
|
| 74 |
|
| 75 |
|
| 76 |
|
| 77 |
|
| 78 | Throttle position sensor signal
|
| 79 |
|
| 80 | Vehicle speed sensor signal
|
| 81 |
|
| 82 |
|
| 83 | Air conditioning control
|
| 84 |
|
| 85 | Data link (OBD-II/MUT-III comms, pin 7 on OBD-II port, C-122)
|
| 86 |
|
| 87 |
|
| 88 | Clutch pedal switch
|
| 89 |
|
| 90 |
|
| 91 | Knock sensor signal
|
| 92 | MAP sensor signal
|
| 93 | Fuel tank pressure differential sensor signal
|
| 94 |
|
| 95 | Fuel level sender sensor signal (gauge)
|
| 96 | Fuel temperature sensor signal
|
| 97 | Fuel level sender sensor signal (low-fuel light)
|
| 98 | Engine immobilizer system
|
| 99 | Ignition switch IG1 (power when ignition in position "ON" and "START")
|
| 100 | Data link (flash signal, pin 26 on diagnostic port, C-121)
|
