FAQ : Lexus IS300 ECU Pinout

FAQ : Lexus IS300 ECU Pinout

By
John Huh
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The IS300 was brought into the mainstream in 1998 and the phenomenon known has “Altezza lights” were born. Sprung from the Japanese nameplate of Altezza, the IS300 brought the non turbo 2JZ into the luxury line of Lexus. Many people opt for the standard 2JZGTE engine swap, while others retain the W55 transmission and simply turbocharge the 2JZGE.

While the Altezza light craze has died down thankfully, these cars and motors are still in abundance. Perfect for the luxury sports coupe enthusiast, the IS300 ECU Pinout is what you need for piggyback computer like an Super AFC install or gauges.

Are you looking for an easy plug and play IS300 stereo wiring harness for the 2001-2005 year range? Check out this unit at www.prostreetonline.com

lexus-is300-ecu-pinout

 

If you are looking to install some aftermarket gauges or you need a sensor output from your ECU, this Lexus IS300 ECU Pinout will get you through it. Our Lexus IS300 ECU Pinout will let you get the install done quickly and without error, please leave us a message below if you have any specific requests for information.

Connector/Pin #SignalFull name/DestinationWire Color
A1EOMChassis GroundWhite/Black
A2ECChassis GroundWhite/Black
A3Not Used
A4BATTEFI Relay Battery PowerBlack/Yellow
A5B2EFI Relay PowerBlack/Red
A6BEFI Relay PowerBlack/Red
A7BMETCS PowerBlue/White
A8ST1-Stop  SwitchBlack/Blue
A9Not Used
A10Not Used
A11KSWTo Unlock WarningBlack/Yellow
A12STAFrom Park Position SwitchBlack
A13MRELMain relay turn onBlack/Orange
A14FCCircuit Opening Relay (Roll)Green/Yellow
A15FPRFuel Pump relayGreen/Red
A16ACMGFrom A/C Compressor RelayBlue/White
A17IGSWSwitched IgnitionBlack/Orange
A18TAMA/C Ambient Temp SensorLight Green/Red
A19Not Used
A20F/PSFrom Center Airbag Sensor AssyBlue
A21Not Used
A22Not Used
A23Not Used
A24Not Used
A25PREA/C Dual Pressure SwitchBlue/Yellow
A26SILOBD Data FeedWhite
A27Not Used
A28Not Used
A29Not Used
A30IMLDSecurity Indicator LampBlue/Black
A31CODETo ImmobilizerGreen/Black
B1Not Used
B2WMil Lamp IndicatorRed/Blue
B3TCTo DLC3 ConnectorRed/White
B4STPFrom Stop  SwitchGreen/White
B5SFTDE-Shift DownGrey/Red
B6SFTUE-Shift upGrey/Green
B7HT1BBank1, Sensor2, HeaterGreen/Black
B8HT2BBank2 Sensor2, HeaterRed/White
B9NEOTo Vehicle Skid ControlGreen
B10TBPPressure Switching Valve VSVPink
B11SPDTo Combination MeterWhite/Blue
B122A/T IndicatorYellow/Green
B13CLSWCruise Control Clutch SwitchYellow/Red
B144To Shift Lock ECULight Green/Black
B15LTrans Control switchGreen/Yellow
B16TACHTach to MeterBlack
B17OX2BBank2 Sensor2, O2 SignalWhite
B18TRC+From Vehicle Skid ControlRed/Yellow
B19ENG+To Vehicle Skid ControlBlue/Black
B20MPX2Multiplex CommunicationsOrange
B21MPX1Multiplex CommunicationsBlue
B22WFSEOBD Data FeedLight Green
B23TXCTTo ImmobilizerPink/Black
B24RXCKTo ImmobilizerViolet
B25PTNKVapor Pressure SensorBlue/White
B26Not Used
B27Not Used
B28OX1BBank1, Sensor2, O2 SignalWhite
B29TRC-From Vehicle Skid ControlWhite/Green
B30ENG-To Vehicle Skid ControlPink
B31CCSCruise Control SwitchBlue/Red
B32VPA2Sub TPS, Idle inputBlue/White
B33VPASub-TPS InputPink/Blue
B34E2Sensor GroundBrown
B35VC5V ReferenceBlue/Yellow
C1E02Chassis GroundWhite/Black
C2E01Chassis GroundWhite/Black
C3ME01Chassis GroundBrown
C4Not Used
C5Not Used
C6Not Used
C7IGFIgnitor Fault DetectionBlack/Blue
C8Not Used
C9Not Used
C10Not Used
C11Not Used
C12Not Used
C13IGTIgnitor 1Grey/Black
C14Not Used
C15#60Injector No. 6Black/White
C16#40Injector No. 4Red/White
C17#20Injector No. 2Blue
C18Not Used
C19Not Used
C20Not Used
C21ACISACIS VSVYellow/Green
C22CCVCanister Closed ValveYellow/Red
C23PSPPower Steering Oil Press. SensorViolet
C24THWEngine Coolant tempRed
C25Not Used
C26EVGMAF GroundBlue/White
C27VGMAF InputGreen/Black
C28OX2ABank2,Sensor1, O2 SignalBlack
C29Not Used
C30HT2ABank2,Sensor1, HeaterPink
C31Not Used
C32THAMAF Temp InputBlue/Black
D1KNK1Knock Sensor #1Black
D2KNK2Knock Sensor #2White
D3NA/T IndicatorGreen/Red
D43A/T IndicatorGreen/White
D5RA/T IndicatorRed/Black
D6PA/T IndicatorGreen
D7E1Chassis GroundBrown
D8Not Used
D9HT1ABank1, Sensor 1, HeaterLight Green
D10SLU-A/T ControlsLight Green/Black
D11SLU+A/T ControlsGreen/White
D12SLN-A/T ControlsRed/White
D13SLN+A/T ControlsYellow/Red
D14MOLEngine Oil Level SensorWhite/Red
D15RLAlternator StatusBlue/Red
D16S4A/T controlsBlack/Red
D17S3A/T ControlsWhite/Blue
D18S2A/T ControlsGreen/Yellow
D19S1A/T ControlsYellow
D20NCO-O/D Clutch GroundGreen
D21NCO+O/D Clutch Speed SensorRed
D22SP2-VSS For A/T GroundRed/Blue
D23SP2+VSS For A/TBlue/Yellow
D24Not Used
D25Not Used
D26Not Used
D27OILA/T ControlsGrey
D28OX1ABank1, Sensor 1, O2 SignalWhite
D29Not Used
D30Not Used
D31Not Used
D32Not Used
D33Not Used
D34SLT-A/T ControlsRed/Black
D35SLT+A/T ControlsBlack/Yellow
E1GEO1Shield for Throttle Control MotorBlack
E2M-Throttle Control MotorRed
E3M+Throttle Control MotorWhite
E4E03Chassis GroundBrown
E5OCV-VVTI Control Signal ReturnYellow/Black
E6OCV+VVTI Control SignalRed/Yellow
E7MOPSEngine Oil Pressure SwitchGrey
E8FANNo1. and No2. FansBlue/Black
E9CL-Throttle Control MotorYellow
E10CL+Throttle Control MotorRed/White
E11PRGCannister PurgeWhite/Green
E12Not Used
E13#50Injector No. 5Blue/Red
E14#30Injector No. 3Violet
E15#10Injector No. 1Red
E16Not Used
E17Not Used
E18Not Used
E19Not Used
E20Not Used
E21Not Used
E22Not Used
E23Not Used
E24VTA2TPS, Idle inputGreen/Yellow
E25VTATPS InputWhite/Red
E26IGT3Ignitor 3Black/Yellow
E27IGT2Ignitor 2Black/Red
E28Not Used
E29G2Camshaft Position SensorGreen
E30Not Used
E31NECrankshaft Position SensorBlack/White
E32NE-Ground for Cam/Crank sensorsBlue
E33Not Used
E34LCK1A/C Clutch Lock SensorWhite/Blue

This does it for our Lexus IS300 ECU Pinout so far, we are always looking to build on what we’ve got, so if you have a request or need a pin in particular let us know.

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10 COMMENTS

  1. Is this for the JDM altezza Gita jce10w or the us/euro is300? I need one for my Japanese altezza Gita jce10w as they are different ECUs to the is300 the part number is 89661-53400.
    Many thanks,

    • Hi Ryan, thanks for reading the IS300 ECU guide.

      Are you running the stock engine in your Japanese altezza Gita? If so, the IS300 USDM ECU pinout is going to be incorrect for your fitment. Are you going to use a stock ECU for your 2JZ?

  3. 02 IS300 2jz gte vvti swapped, looking to make the stock engine coolant temp gauge to work as I dont want to install an aftermarket one.

    can you please tell me if there is a way to do so, as I have search a lot of forums all I got is for sc300 and that they need to wire one ground to passenger side ik2 plug, and the gauge work again.

    Please email me if have a solution for this.

    much appreciated.

    Oz

    • Hey Oz, thanks for reading. Sounds like an awesome project. So I’m assuming you do know the wiring in your cluster, do you have a full pinout? Really all you need is a converter of some sort. This will be required in order to provide your stock gauge with the right ohm range in question.

  4. I’m wiring up this now. However I can’t find what fuse I should use for certain ecu wiring. For example the MAF signal. What fuse should I use? I’m sorry if this is such a noob question but I’m swapping Into an s13.

  6. Actually I figured it out. I have everything wired but. So my next question is what pins should be grounded. Obviously the ones that say ground but looking over the diagram I see *ground sensor *or *MAF ground* Should I ground these also?

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