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.
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 # | Signal | Full name/Destination | Wire Color |
| A1 | EOM | Chassis Ground | White/Black |
| A2 | EC | Chassis Ground | White/Black |
| A3 | Not Used | ||
| A4 | BATT | EFI Relay Battery Power | Black/Yellow |
| A5 | B2 | EFI Relay Power | Black/Red |
| A6 | B | EFI Relay Power | Black/Red |
| A7 | BM | ETCS Power | Blue/White |
| A8 | ST1- | Stop Switch | Black/Blue |
| A9 | Not Used | ||
| A10 | Not Used | ||
| A11 | KSW | To Unlock Warning | Black/Yellow |
| A12 | STA | From Park Position Switch | Black |
| A13 | MREL | Main relay turn on | Black/Orange |
| A14 | FC | Circuit Opening Relay (Roll) | Green/Yellow |
| A15 | FPR | Fuel Pump relay | Green/Red |
| A16 | ACMG | From A/C Compressor Relay | Blue/White |
| A17 | IGSW | Switched Ignition | Black/Orange |
| A18 | TAM | A/C Ambient Temp Sensor | Light Green/Red |
| A19 | Not Used | ||
| A20 | F/PS | From Center Airbag Sensor Assy | Blue |
| A21 | Not Used | ||
| A22 | Not Used | ||
| A23 | Not Used | ||
| A24 | Not Used | ||
| A25 | PRE | A/C Dual Pressure Switch | Blue/Yellow |
| A26 | SIL | OBD Data Feed | White |
| A27 | Not Used | ||
| A28 | Not Used | ||
| A29 | Not Used | ||
| A30 | IMLD | Security Indicator Lamp | Blue/Black |
| A31 | CODE | To Immobilizer | Green/Black |
| B1 | Not Used | ||
| B2 | W | Mil Lamp Indicator | Red/Blue |
| B3 | TC | To DLC3 Connector | Red/White |
| B4 | STP | From Stop Switch | Green/White |
| B5 | SFTD | E-Shift Down | Grey/Red |
| B6 | SFTU | E-Shift up | Grey/Green |
| B7 | HT1B | Bank1, Sensor2, Heater | Green/Black |
| B8 | HT2B | Bank2 Sensor2, Heater | Red/White |
| B9 | NEO | To Vehicle Skid Control | Green |
| B10 | TBP | Pressure Switching Valve VSV | Pink |
| B11 | SPD | To Combination Meter | White/Blue |
| B12 | 2 | A/T Indicator | Yellow/Green |
| B13 | CLSW | Cruise Control Clutch Switch | Yellow/Red |
| B14 | 4 | To Shift Lock ECU | Light Green/Black |
| B15 | L | Trans Control switch | Green/Yellow |
| B16 | TACH | Tach to Meter | Black |
| B17 | OX2B | Bank2 Sensor2, O2 Signal | White |
| B18 | TRC+ | From Vehicle Skid Control | Red/Yellow |
| B19 | ENG+ | To Vehicle Skid Control | Blue/Black |
| B20 | MPX2 | Multiplex Communications | Orange |
| B21 | MPX1 | Multiplex Communications | Blue |
| B22 | WFSE | OBD Data Feed | Light Green |
| B23 | TXCT | To Immobilizer | Pink/Black |
| B24 | RXCK | To Immobilizer | Violet |
| B25 | PTNK | Vapor Pressure Sensor | Blue/White |
| B26 | Not Used | ||
| B27 | Not Used | ||
| B28 | OX1B | Bank1, Sensor2, O2 Signal | White |
| B29 | TRC- | From Vehicle Skid Control | White/Green |
| B30 | ENG- | To Vehicle Skid Control | Pink |
| B31 | CCS | Cruise Control Switch | Blue/Red |
| B32 | VPA2 | Sub TPS, Idle input | Blue/White |
| B33 | VPA | Sub-TPS Input | Pink/Blue |
| B34 | E2 | Sensor Ground | Brown |
| B35 | VC | 5V Reference | Blue/Yellow |
| C1 | E02 | Chassis Ground | White/Black |
| C2 | E01 | Chassis Ground | White/Black |
| C3 | ME01 | Chassis Ground | Brown |
| C4 | Not Used | ||
| C5 | Not Used | ||
| C6 | Not Used | ||
| C7 | IGF | Ignitor Fault Detection | Black/Blue |
| C8 | Not Used | ||
| C9 | Not Used | ||
| C10 | Not Used | ||
| C11 | Not Used | ||
| C12 | Not Used | ||
| C13 | IGT | Ignitor 1 | Grey/Black |
| C14 | Not Used | ||
| C15 | #60 | Injector No. 6 | Black/White |
| C16 | #40 | Injector No. 4 | Red/White |
| C17 | #20 | Injector No. 2 | Blue |
| C18 | Not Used | ||
| C19 | Not Used | ||
| C20 | Not Used | ||
| C21 | ACIS | ACIS VSV | Yellow/Green |
| C22 | CCV | Canister Closed Valve | Yellow/Red |
| C23 | PSP | Power Steering Oil Press. Sensor | Violet |
| C24 | THW | Engine Coolant temp | Red |
| C25 | Not Used | ||
| C26 | EVG | MAF Ground | Blue/White |
| C27 | VG | MAF Input | Green/Black |
| C28 | OX2A | Bank2,Sensor1, O2 Signal | Black |
| C29 | Not Used | ||
| C30 | HT2A | Bank2,Sensor1, Heater | Pink |
| C31 | Not Used | ||
| C32 | THA | MAF Temp Input | Blue/Black |
| D1 | KNK1 | Knock Sensor #1 | Black |
| D2 | KNK2 | Knock Sensor #2 | White |
| D3 | N | A/T Indicator | Green/Red |
| D4 | 3 | A/T Indicator | Green/White |
| D5 | R | A/T Indicator | Red/Black |
| D6 | P | A/T Indicator | Green |
| D7 | E1 | Chassis Ground | Brown |
| D8 | Not Used | ||
| D9 | HT1A | Bank1, Sensor 1, Heater | Light Green |
| D10 | SLU- | A/T Controls | Light Green/Black |
| D11 | SLU+ | A/T Controls | Green/White |
| D12 | SLN- | A/T Controls | Red/White |
| D13 | SLN+ | A/T Controls | Yellow/Red |
| D14 | MOL | Engine Oil Level Sensor | White/Red |
| D15 | RL | Alternator Status | Blue/Red |
| D16 | S4 | A/T controls | Black/Red |
| D17 | S3 | A/T Controls | White/Blue |
| D18 | S2 | A/T Controls | Green/Yellow |
| D19 | S1 | A/T Controls | Yellow |
| D20 | NCO- | O/D Clutch Ground | Green |
| D21 | NCO+ | O/D Clutch Speed Sensor | Red |
| D22 | SP2- | VSS For A/T Ground | Red/Blue |
| D23 | SP2+ | VSS For A/T | Blue/Yellow |
| D24 | Not Used | ||
| D25 | Not Used | ||
| D26 | Not Used | ||
| D27 | OIL | A/T Controls | Grey |
| D28 | OX1A | Bank1, Sensor 1, O2 Signal | White |
| D29 | Not Used | ||
| D30 | Not Used | ||
| D31 | Not Used | ||
| D32 | Not Used | ||
| D33 | Not Used | ||
| D34 | SLT- | A/T Controls | Red/Black |
| D35 | SLT+ | A/T Controls | Black/Yellow |
| E1 | GEO1 | Shield for Throttle Control Motor | Black |
| E2 | M- | Throttle Control Motor | Red |
| E3 | M+ | Throttle Control Motor | White |
| E4 | E03 | Chassis Ground | Brown |
| E5 | OCV- | VVTI Control Signal Return | Yellow/Black |
| E6 | OCV+ | VVTI Control Signal | Red/Yellow |
| E7 | MOPS | Engine Oil Pressure Switch | Grey |
| E8 | FAN | No1. and No2. Fans | Blue/Black |
| E9 | CL- | Throttle Control Motor | Yellow |
| E10 | CL+ | Throttle Control Motor | Red/White |
| E11 | PRG | Cannister Purge | White/Green |
| E12 | Not Used | ||
| E13 | #50 | Injector No. 5 | Blue/Red |
| E14 | #30 | Injector No. 3 | Violet |
| E15 | #10 | Injector No. 1 | Red |
| E16 | Not Used | ||
| E17 | Not Used | ||
| E18 | Not Used | ||
| E19 | Not Used | ||
| E20 | Not Used | ||
| E21 | Not Used | ||
| E22 | Not Used | ||
| E23 | Not Used | ||
| E24 | VTA2 | TPS, Idle input | Green/Yellow |
| E25 | VTA | TPS Input | White/Red |
| E26 | IGT3 | Ignitor 3 | Black/Yellow |
| E27 | IGT2 | Ignitor 2 | Black/Red |
| E28 | Not Used | ||
| E29 | G2 | Camshaft Position Sensor | Green |
| E30 | Not Used | ||
| E31 | NE | Crankshaft Position Sensor | Black/White |
| E32 | NE- | Ground for Cam/Crank sensors | Blue |
| E33 | Not Used | ||
| E34 | LCK1 | A/C Clutch Lock Sensor | White/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.
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?
This is the same pinout for 04 thru 06 is300
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.
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.
Hey Omar, thanks for reading.
What are you swapping into the S13? A non turbo 2JZ? What harness are you using? what ECU?
I’m using a stock GE auto ecu with engine
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?
I wish you would right up a swap list for us,……putting 2jz in postal jeep icecream truck.