91-93 US VR4 Version 1 Plug and Play Flash Ecu (Works with 91-94 GTO obd1 cars)
for Mitsubishi 3000gt VR4 or Dodge Stealth TT
Thank you for purchasing a Jesters Plug and Play Flash Ecu. This ecu can be utilized for the following 91-93US VR4/91-94GTO Obd1. Please double check you are using the correct instructions for your application.
1x 91-93 3000gt VR4 US Spec Plug and Play (PNP) Flash Ecu with the latest version of Chrome preinstalled
1x OBD1-OBD2 adapter plug with flash plug for Tactrix 2.0 cable
1x 91-93 US VR4/91-98 GTO/91-95 Fed Spec SL Plug and Play (PNP) Flash Ecu with the latest version of Chrome or ChromeSL preinstalled
1x 91-93 OBD1-OBD2 adapter plug with flash plug for Tactrix 2.0 cable
1x Gray 12 pin connector with pre-installed yellow wire in pin 51
1x Red wire(to be installed)
5x Extra ecu pins
1x Copy of Chrome – Free download via www.Chromedecu.com
Installation Instructions 91-93 US 3000GT VR4
Jumper setup: The 91-93 US VR4 PNP ECU can reverse the primary O2 sensors by changing the jumpers.
Stock setup for all US VR4 and GTOs is pictured below. If the jumpers are turned 90 degrees this switches the O2s. If your ecu jumpers do not look like the setup below double check your ecu version.
Step 1- With car off, remove stock ecu(See A) from behind center console.
Step2- Install red wire into pin 77 of car side plug. See plug pinout below as viewed looking at ecu.
Step3- Plug the 3 stock plugs and the supplied gray 12 pin plug with pre-installed yellow wire into PNP ecu.
Step 4- Route the yellow and red wires to the stock OBD1 connector by the fuse box under the driver side dash.
Step5- Plug the yellow wire in the back of the OBD1 connector pin 6 (Corner).
Step6- Plug the red wire in pin 2.
Your car is now converted to a Flash Ecu running Chrome. It is a full OBD2 ecu. You can now use any OBD2 reader or the Tactrix 2.0 cable to reflash or datalog your car when using the supplied adapter. The adapter does not have to be installed unless you are datalogging, reflashing or reading the OBD2 codes/data.
|Pin Number 91-93 Plug and Play Flash Ecu||Pin Number 98-99||98-99 VR4 Function|
|39||26||O2 Heater Rear Post Cat|
|40||27||O2 Heater Front Post Cat|
|46||4||O2 Heater Front Pre Cat|
|52||17||Fan Motor Relay (Hi)|
|53||18||Fan Motor Relay (Lo)|
|54||35||EVAP emission vent solenoid|
|58||86||Reduce Torque request 1 A/T (SL Only)|
|59||87||Reduce Torque execution A/T (SL Only)|
|60||88||Reduce Torque request 2 A/T (SL Only)|
|61||73||O2 Sensor Rear Post Cat|
|62||74||O2 Sensor Front Post Cat|
|74||92||Map Sensor 0-5V|
|79||3||O2 Heater Rear Pre Cat|
The plug views below is as if you were looking straight at the ecu plug or the back of the vehicle ecu plugs.