2023-01-06 17:10:33 -08:00
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# 1993 Honda Prelude
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2021-02-15 20:43:25 -08:00
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See also [Honda Accord 1995](Honda-Accord-1995)
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2020-08-27 14:32:54 -07:00
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2022-01-24 17:21:25 -08:00
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[94 accord ex ecu pinout](http://honda-tech.com/showthread.php?t=2377726)
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2020-08-27 14:32:54 -07:00
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## 26 pin
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| --- | ------------------------------------ | --------- | ------------------------------------------------------- | ---------------------------- |
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| A1 | W63 | BRowN | <span style="background:#00FF00">Injector \#1</span> | Output |
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| A2 | W64 | YEL | <span style="background:#00FF00">Injector \#4</span> | Output |
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| A3 | W61 | RED | <span style="background:#00FF00">Injector \#2</span> | Output |
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| A4 | W62 | \* | \* | \* |
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| A5 | W59 | BLUe | <span style="background:#00FF00">Injector \#3</span> | Output |
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| A7 | W57 | GRN/BLK | <span style="background:#00FF00">Fuel Pump Relay</span> | Output, sink/low |
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| A8 | W58 | \* | \* | \* |
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| A9 | W55 | BLK/BLU | Idle Air Control Valve | Output, sink/low. 500Hz |
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| A12 | W54 | GReeN | Radiator Fan Control Module | Output |
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| A13 | W51 | LTGRN/RED | MIL | Output, low-side |
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| A22 | W44 | \* | \* | \* |
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| A23 | <span style="color:green">W41</span> | BLK | <span style="background:#00FF00">Power Ground</span> | Ground |
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| A24 | <span style="color:green">W42</span> | BLK | Power Ground | Ground |
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| A25 | <span style="color:red">W39</span> | YEL/BLK | <span style="background:#00FF00">Power Source</span> | Input, +12 if ignition is on |
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| A26 | <span style="color:green">W40</span> | BRN/BLK | Logic Ground | Ground |
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## 16 pin
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| --- | ---- | ------- | -------------------------------------------------- | --------------------------------------------------------- |
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| B2 | W38 | BRN/BLK | Logic Ground | Ground |
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| B10 | W30 | ORG | Vehicle Speed Sensor | Input (grounded 4 times per speedometer cable revolution) |
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| B11 | W27 | ORanGe | CYP Signal | Input, one pulse per cam rev |
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| B12 | W28 | WHT | CYP Ground | |
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| B13 | CAM- | ORG BLU | <span style="background:#00FF00">TDC Signal</span> | Input, four pulses per cam revolution |
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| B14 | CAM+ | WHT BLU | TDC Ground | |
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| B15 | CNK- | BLU GRN | <span style="background:#00FF00">CKP Signal</span> | Input, 24 pulses per cam |
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| B16 | CNK+ | BLU YEL | CKP Ground | |
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## 22 pin
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| --- | ------------------------------------ | ------------ | -------------------------------------------------- | ------------------------------------------- |
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| D3 | W19 | \* | \* | \* |
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| D11 | W11 | RED/BLK | Throttle Position Sensor | Input |
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| D13 | W9 | RED/WHT | Engine Coolant Temperature Sensor | Input |
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| D15 | W7 | RED YEL | Intake Air Temperature Sensor | Input (bias pull-up 1.5K) |
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| D16 | W8 | \* | \* | \* |
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| D17 | W5 | WHiTe/YELlow | <span style="background:#00FF00">MAP Sensor</span> | Input: 0.32V @ -13.9 PSI, 4.84V @ 10.94 PSI |
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| D20 | <span style="color:yellow">W4</span> | YEL BLU | VCC2 TPS, EGVL sensor power supply | Output +5V |
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| D21 | W1 | GRN/WHT | SG1 MAP sensor GND | Ground |
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| D22 | W2 | GRN BLU | SG2 - Sensors Ground | ground |
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