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'''POWER/GROUND OVERVIEW''' ||Switched 12Vs||B/W, 49, 59, 109||all come from ECCS relay, connected inside the harness|| ||Grounds||50, 60 and 110, 20,07,108,116||these go to body ground in 2 groups|| '''GROUND LAYOUT (ORIGINAL HARNESS)''' ||ECU pin||function||proposed usage||notes|| ||50, 60||'''GND for:''' CAS, Air.Reg '''Shielding for:''' CAS, NBO signal, KS, MAF||tie to Sensor GND||goes to Engine Ground 1|| ||10 20 107 108 116||'''GND for:''' FICD, Ign. Transistors, Injectors, Idle valve, O2 heater '''seems like a Power GND'''||use as Power GND '''TBC''' how thick? ||goes to Engine Ground 2|| ||26||MAF GND||tie to Sensor GND||originated from ECU|| ||30||TPS GND, ECT GND||tie to Sensor GND||originated from ECU|| [http://gtlamateurfest.uw.hu/nissan/2013-01-CAS-oscope/GroundWiringDiagram.jpg Orig. Ground Wiring](HUGE) '''Wire assignments''' (that I already know): ||ECU pin||color||orig.func||location of remote end||VEMS pin||new function||comment|| ||1||R/W||Ign.1||d/c||EC36 pin 35|| ||TTL output req.|| ||2||R/Y||Ign.2||d/c||EC36 pin 33|| ||TTL output req.|| ||3||R/G||Ign.3||d/c||EC36 pin 34|| ||TTL output req.|| ||11||R/L||Ign.4||d/c||EC36 pin 36|| ||TTL output req.|| ||101||W/B||Inj. 1||d/c||EC36 pin 7|| || || ||110||Y/B||Inj. 2||d/c||EC36 pin 19|| || || ||103||G/B||Inj. 3||d/c||EC36 pin 8|| || || ||112||L/B||Inj. 4||d/c||EC36 pin 20|| || || ||41||G/Y||CAS TDC strobes||d/c||EC36 pin 27||primary trigger|||| ||51||"||"||"||"||"||"|| ||42||G/B||CAS degree pulse||d/c||EC36 pin 13||secondary trigger|||| ||52||"||"||"||"||"||"|| ||18||B/P||fuel pump relay||d/c||EC36 pin 15|| ||low-side switched|| ||54||Y/W||Idle sw. -||TB left side||EC36 pin 28|| || || ||27||G/B||MAF signal||front of engine||EC18 pin 6|| || || ||26||B||MAF ground||front of engine||TBD|| ||was common with other B pins in Nissan ECU|| ||57||Y||Idle sw. +||left side of throttle body||EC36 pin 2||IAT|| || ||48||LG/R||TPS supply||d/c||EC36 pin 29|| || || ||38||LG/B||TPS signal||d/c||EC36 pin 1|| || || ||30||B||ECT+TPS ground||at TB||EC39 pin 5||sens. comm. GND||Q|| ||7||Y/R||tach. signal||d/c||EC36 pin4|| ||voltage level or PWM?|| ||106||SB||idle control valve||d/c||EC36 pin 17||idle control valve||picked Inj_H channel for this (PWM)|| ||23||W||knock sensor||d/c||EC18 pin 1|| || || ||28||L/OR||ECT signal||d/c||EC36 pin 14|| || || ||16||R/B||ECCS relay||d/c||n/a|| ||own switching circuit, see top of page|| ||45||B/R||Ign. switch||d/c||n/a|| ||own switching circuit, see top of page|| ||58||R||Constant 12V||d/c||EC36 pin 23||FLYBACK, direct path to Injector common (resistors common)|| || ||29||W||O2 sensor||d/c||EC18 pin 13||WBO2 (Nernst) signal|| || ||115||L||O2 heater||d/c||EC18 pin 18||WBO2 heater|| || '''New wires to be laid for new functions''' || ||G||WBO2 pump+||WBO2 area||EC18 pin 9|| || ||Y||WBO2 pump-||WBO2 area||EC18 pin 7|| || || 'TBD' ||MAP +5V||rear of intake manifold||EC36 pin 28|| || || 'TBD' ||MAP signal||rear of intake manifold||EC18 pin 6|| '''Wires still needed for new functions''' ||||Oil pressure. sensor||will add later|| ||||EBP sensor||will add later|| ||||Water temp. sensor||will add later|| ||||Water pressure sensor||will add later|| '''Wires freed up''' (no equivalent function on VEMS, or not YET assigned to a VEMS function): ||ECU pin||color||function||location of remote end||comment|| ||6||G/Y||A/C relay||? a harness around the exhaust side||low side switch|| ||17||?||Check Connector||? inside|||| ||32||?||Check Connector||? inside|||| ||33||?||Check Connector||? Inside|||| ||43||OR||starting signal||? key, probably|||| ||44||G/OR||neutral switch||?probably merges into harness around firewall|||| ||46||L/G||A/C switch||? inside||(A/C switch + blower on) -> 0V|| ||47||?||Check Connector||? Inside|||| ||53||Y/G||VSS||from gauge cluster|||| ||56||?||A/T control unit||?||could be missing|| ||111||PU||PR control solenoid||next to ign. power transistors||low side switch||
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