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1 | Mitsubishi Galant VR-4 (EC5A) and Legnum (EC5W) Electronic Fuel Injection (Engine) ECU CON2 and MUT pin to H8/539, 7202 and 7203 IC pin connection information | #REF! | |||||||||||||||||
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3 | CON2 | This document outlines the pinning between the OBD / MUT ports, the CON2 programming connector and the H8/539 (and variants such as the 7202 and 7203) processors (aka the "IC"). It also outlines how each pin behaves in different states (during a bad or failed flash chip, during normal ECU running conditions and during programming modes). | |||||||||||||||||
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5 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | CON2 Pin | Voltages | Behaviour on ECU boot fail | Behaviour when ECU running | Behaviour when programming | CON2 Pin Function | OBD Pin | H8/539 IC Pin(s) | |||
6 | 1 | 0.0 - 0.0v | Constant 0.0v | Ground connection | 10, 26, 35, 53, 73, 99 | ||||||||||||||
7 | #REF! | 2 | 0.0 - 5.0v | K-Line Pin¹ | K-Line Pin¹ | Constant 5.0v from IC or PCB⁵ | Serial RXD from chip to prog tool | K-Line Pin¹ | 102 | ||||||||||
8 | 3 | 0.0 - 5.0v | K-Line Pin¹ | K-Line Pin¹ | K-Line Pin¹ | Serial TXD to chip from prog tool | K-Line Pin¹ | 103 | |||||||||||
9 | 4 | 0.0 - 5.0v | Reset signal from WDT² | Constant 5.0v from IC or PCB | Reset signal from prog tool² | Reset signal to chip from prog tool | 71 | ||||||||||||
10 | 5 | 5.0 - 5.0v | Constant 5.0v | 5V power to chip Vin pin | 1, 44, 76 | ||||||||||||||
11 | 6 | 3.5 - 17v³ | Constant 3.5v from IC or PCB² | Constant 3.5v from IC or PCB² | Constant 12v from prog tool³ | 12V to chip Vpp pin from prog tool | MUT Pin 1 | 19 | |||||||||||
12 | 7 | 4.5 - 12v⁴ | Constant 4.5v from IC or PCB | Constant 4.5v from IC or PCB | Constant 12v from prog tool⁴ | 12V to chip MD1 pin from prog tool | 82 | ||||||||||||
13 | 8 | 0.0 - 0.0v | Constant 0.0v | Ground connection | 10, 26, 35, 53, 73, 99 | ||||||||||||||
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15 | Footnote | Additional Information | |||||||||||||||||
16 | 1 | Connected to K-Line pin but goes through a logic level converter (down to 5V), the IC switches which pin (TXD or RXD) is connected to K-Line depending on transmitting or receiving | |||||||||||||||||
17 | 2 | Reset pin is taken to GND to reset IC, it's connected on the PCB to IC pin 19 (WDT out / Vpp in) by logic level converter, if IC crashes or fails to boot WDT pin pulls reset pin to ground | |||||||||||||||||
18 | 3 | Vpp pin (and as such MUT Pin 1) should be taken to 12v to supply enough power for flash programming however the Tactrix Openport 2.0 raises this to 17v | |||||||||||||||||
19 | #REF! | 4 | When flashing via MUT, additional circuitry on PCB raises this to 12v when it detects 12v or more on MUT Pin 1 | ||||||||||||||||
20 | 5 | Pin is seemingly not used during programming via MUT but is probably used by CON2 external programmer such as the "HOKUTO DENSHI F-ZTAT Programmer FLASH 2" | |||||||||||||||||
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22 | Mode | L-Line Pin | MUT Reflash Pin 1 | K-Line Pin | ⁰¹²³⁴⁵⁶⁷⁸⁹ | ||||||||||||||
23 | Boot Fail | Const 5.0v | Constant 12v from MUT Tool² | Signalling ranging 0 - 12 v | |||||||||||||||
24 | Running | Const 5.0v | Constant 3.5v from IC / PCB | Signalling ranging 0 - 12 v | |||||||||||||||
25 | Program | Const 5.0v | Constant 12v from MUT Tool² | Signalling ranging 0 - 12 v | |||||||||||||||
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28 | Last updated 26th Nov 2020 | ||||||||||||||||||
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30 | Although best efforts have been made, this information is not guaranteed to be correct - use at your own risk! | ||||||||||||||||||