Merlins Ralliart and EvoX TUNING GUIDE Version K.pdf - EvoScan

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MERLINS RALLIART & EVOLUTION-X TUNING GUIDESECTION 3 – DIAGNOSTIC TROUBLE CODES3.01-OBD-II DTC INTRODUCTIONThe Diagnostic Trouble Code numbering follows a standardized structure. AllDiagnostic Trouble Codes have a letter followed by a 4-digit number (e.g. P1234).The first letter indicates the type of code:P = Power-trainC = ChassisB = BodyU = Network CommunicationThe remaining 4-digit number specifies the problem within that system. The faultcodes documented here have been abbreviated and restricted for simplicity to afour cylinder twin-cam with two oxygen sensors.The RALLIART and EvoX coding has many sophisticated constraints embedded inthe ROM that are not in earlier versions of the Evolution. What typically happens iswhen you make modifications to improve breathing and increase boost levels, oneor more of the boundary or limit tables or timers will be exceeded, thus triggeringsome DTC.This must have been a constant source of irritation through-out 2009 but the tuningcommunity, spearheaded by tephra de-coding the various ROMs, have found waysto get around the problems.REV: 0.K merlin@three.com.au Page 30 of 134
MERLINS RALLIART & EVOLUTION-X TUNING GUIDE3.02-OBD-II DIAGNOSTIC CONNECTORThe connector is behind the dash facia, drivers side, just out-board of the steeringcolumn on the EVOX and RALLIART. Just feel with your hand and plug theOpenPort2 cable into the 16 pin socket.The OBD-II specification provides for a standardized hardware interface, SAE J1962defines the pin-out of the connector as:Table 2OBDII CONNECTOR PIN FUNCTIONDESCRIPTION PIN # DESCRIPTION8 16 BATTERY VOLTAGEECU - K line 7 15 L line of ISO9141-2 & ISO14230-4CAN high ISO15765-4 & SAE-J2234 6 14 CAN low ISO15765-4 & SAE-J2234SIGNAL GROUND 5 13CHASSIS GROUND 4 123 11Bus positive line of SAE-J1850 2 10 Bus negative line of SAE-J18501 9 ETACSNote that it is now considered a good idea to remove pin 9 from the OpenPort2cable to prevent damage to the ETACS ECU. Pin 9 is only used for flashing SubaruECUs.REV: 0.K merlin@three.com.au Page 31 of 134
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P0444P0445P0446P0447P0448P0449P0450
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Merlins Ralliart and EvoX TUNING GUIDE Version K.pdf - EvoScan

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