AEM Porsche 20072009 9971 Turbo 20052008 Carrera 303905 User Manual

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F uel T unin g
F uel  tu nin g w it h  M AF s ensors  u ses th e tw o 3 0-c ell  2 D  ta ble s b elo w  c alle d  M AF1_C al  [g m s/s ]  a nd
 M AF2_C al  [g m s/s ] .  W hen tw o M AF s ensors  a re  e nable d, th ese ta ble s a re  a dded to geth er to
d ete rm in e fu el  re quir e m ents .  T he V E ta ble  is  n ot u sed w hen M AF is  e nable d.  T he fa cto ry  U EG O
s ensors  a re  s upporte d a nd th e A EM  a dapte r h arn ess is  w ir e d to  u se th em . 
						

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T unin g Ig nit io n T im in g
U nle ss u sers  a re  u sin g a n e xte rn al  (n on fa cto ry ) M AP s ensor p lu m bed in to  th e in ta ke m anifo ld ,  it  is
r e com mended th at u sers  d o n ot u se  M AP [k P a]  a s a n e ngin e lo ad in put in to  th e Ig nit io n ta ble .  T his  is
b ecause th e O EM  P ors che b oost p re ssure  s ensor is  lo cate d b efo re  th e th ro ttle  b la de a nd w ill  n ot
r e gis te r m anifo ld  v a cuum .  T he A EM  9 97.1  b ase c alib ra tio ns a re  c onfig ure d to  u se th e O EM  p re ssure
s ensors  a nd th e m ain  ig nit io n m ap lo ad a xis  is   M assA ir flo w  [g m s/re v]  a s s how n b elo w . 
						

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M AF F ilt e r
T unin g th e M AF filt e r p ro perly  p la ys a n im porta nt ro le  fo r la rg e tra nsie nt th ro ttle  c hanges.  If  th ro ttle  a ngle
i s  q uic kly  in cre ased to  w id e o pen fr o m  a  lo w  th ro ttle  a ngle , h ig h m anifo ld  v a cuum  c ondit io n, a ir  m ass fills
t h e in ta ke m anifo ld  (n early  e qualiz in g p re ssure  to  a tm ospheric ) a t a  q uic ker ra te  th an is  c onsum ed b y
t h e e ngin e (th is  is  m ore  p ro m in ent a t lo w er R PM ).  W it h out filt e rin g, th is  w ould  re sult  in  p oor (o ve r)
f u elin g.  T he e xam ple  b elo w  s how s h ig her filt e rin g d urin g q uic k th ro ttle  o pen e ve nts  to  c om bat o ve r
f u elin g a nd a  lo w er filt e r fo r th ro ttle  c lo sin g e ve nts  to  a llo w  fo r m axim um  d ecel  fu el  c ut re sponse.
M AF F ails afe
I n  th e e ve nt o f  a  s ensor/w ir in g fa ult  (M AF s ensor in put le ss th an 0 .0 5V  o r g re ate r th an 4 .9 5V ), th e
 E rro rM AF c hannel  w ill  to ggle  fr o m  0  to  1 .  If  th e M AF F ails afe  E nable  is  a ctiv e  (c onfig ura ble  in  th e
w iz ard s   M ass A ir flo w  ta b), th e s yste m  w ill  u se th e 2 D   M AF_F ails afe  [g m s/re v]  lo ok-u p ta ble  to
c alc ula te  a ir flo w  in ste ad o f  u sin g th e M AF s ensors .  U sers  c an a ls o c hoose b etw een T hro ttle  [% ] a nd
M AP [k P a] a s a  lo ad a xis .  U sers  c an a ls o e nable  th e le an p ro te ct fu nctio n in  th e s etu p w iz ard  fo r fu rth er
e ngin e s afe ty . 
						

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DRIV E -B Y-W IR E T H R O TTLE  C O NTR O L
T he P ors che 9 97.1  u ses a  s in gle  th ro ttle  b ody c ontro lle d v ia  d riv e -b y-w ir e
( D BW ). It  is  im porta nt to  n ote  th at th ro ttle  c ontro l  is  a  c rit ic al  s yste m  w hic h
n eeds to  b e c orre ct. T he b asic  te rm s o f  d riv e -b y-w ir e  a re  a s fo llo w s: th e
‘ g as p edal’  in sid e th e p assenger c abin  is  c alle d th e A ccele ra to r P edal
( D BW _A PP1% ), w hile  th e e le ctro nic ally  c ontro lle d th ro ttle  in  th e e ngin e
b ay is  re fe re nced a s ‘T hro ttle ’  (T hro ttle % , D BW 1_TP SA% ). B ased o n th e
m easure d A ccele ra to r P edal  p osit io n, th e E CU d ete rm in es a  d esir e d
D BW _Targ et p osit io n a nd m ove s th e T hro ttle  to  th at p osit io n. 
A s s how n, th ere  is  a  D riv e  B y W ir e  W iz ard  w hic h m ust b e u sed to  c alib ra te  a ccele ra to r p edal  a nd
t h ro ttle  p osit io n s ensors . A lt h ough s ensor c alib ra tio n v a lu es fr o m  o ne v e hic le  m ay b e c lo se e nough to
w ork  fo r a noth er v e hic le  u nder s om e c ir c um sta nces, it  is  a bsolu te ly  n ecessary  to  ru n th e D riv e  B y W ir e
W iz ard  b efo re  ru nnin g th e e ngin e fo r th e fir s t tim e. T he w iz ard  s hould  b e re peate d if  a ny c om ponents  in
t h e th ro ttle  c ontro l  s yste m  a re  re m ove d o r re pla ced s uch a s th e th ro ttle  b odie s, T P S s ensors , e le ctro nic
t h ro ttle  c ontro l  m oto r, o r a ccele ra to r p edal.
P le ase e nsure  th e v e hic le ’s  b atte ry  is  fu lly  c harg ed (a t le ast 1 2.6  V olt s ) b efo re  ru nnin g th e D riv e  B y W ir e
W iz ard , a s lo w  b atte ry  v o lt a ge c an re sult  in  a bnorm al  s ensor m easure m ents . If  a  b atte ry  c harg er is
a va ila ble , it  is  p re fe ra ble  to  c onnect th e b atte ry  c harg er in  5 A , 1 0A , o r 2 0A  m ode a nd p erfo rm  th e D riv e
B y W ir e  W iz ard  w hile  th e b atte ry  v o lt a ge is  n ear 1 3.5 –1 4.0  V olt s . W hen c onnecte d to  th e In fin it y  E M S
w it h  th e e ngin e O FF, g o to  W iz ard s |  D riv e  B y W ir e  W iz ard .  F ollo w  th e s te p-b y-s te p in stru ctio ns fo r
e ach p age. 
The P ors che 9 97.1  T urb o S PO RT b utto n (S port C hro no p ackage o nly ) lo cate d in  th e
c ente r c onsole  (s how n) s till  s erv e s a s a  s w it c h in put to  th e E CU. T his  s w it c h c hanges th e
a ccele ra to r-p edal  to  th ro ttle -ta rg et re la tio nship  a nd a dds a  te m pora ry  (1 0 s econd)
o ve rb oost fu nctio n (fr o m  1 .0  b ar to  1 .2  b ar) in  th e s to ck P ors che D M E. T hese th ro ttle
c urv e s a re  c onfig ura ble  in  th e In fin it y  T uner s oft w are  u sin g th e D BW _Thro ttle C urv e 1 /
D BW _Thro ttle C urv e 2 ta ble s, w hic h a llo w  th e tu ner to  d efin e th e D BW  th ro ttle  ta rg et b ased o n
A ccele ra to r P edal  P osit io n a nd E ngin e S peed.  In ste ad o f  im ple m entin g o ve rb oost fu nctio nalit y  in to  th e
s port b utto n, In fin it y  u ses th e fa cto ry  c ru is e c ontro l  b utto ns o ve r C AN in ste ad to  c onfig ure  th e
M ODE_S W IT C H fu nctio n to  c hange b oost ta rg ets .  S ee th e  C ru is e C ontro l  s ectio n o f  th is  m anual  fo r
m ore  in fo rm atio n a bout M ODE_S W IT C H. 
						

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T he 1 D  M odeS ele ct_ D BW  ta ble  is  u sed to  s w it c h b etw een th e tw o d iffe re nt D BW _Thro ttle C urv e  ta ble s,
d ependin g o n th e s ta tu s o f  th e C AN_S PO RTB UTTO N s ig nal.  T he C AN_S PO RTB UTTO N to ggle s
b etw een 0  a nd 1  (2  a nd 3  a re  n ot u sed) w hen d epre ssin g th e S PO RT b utto n. S ta te s 0  a nd 1  a re  m apped
t o  th e D BW _Thro ttle C urv e 1 a nd D BW _Thro ttle C urv e 2 ta ble s re spectiv e ly . B oth  2 D  ta ble s u se a ccele ra to r
p edal  p osit io n fo r th e y -a xis  a nd R PM  fo r th e x -a xis . T he v a lu es th at a re  e nte re d in  th e ta ble  a re  th ro ttle
p osit io n ta rg ets  (e xam ple  s how n b elo w ).
N ote : T here  is  a ls o  a  D BW  T unin g s e ctio n in  th e W iz a rd s |  S etu p W iz a rd  |  D BW  T unin g…  T hese
s e ttin gs c a n b e u se d to  fin e tu ne D BW  r e sp onse . 
						

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T here  a re  a  fe w  in te gra te d D BW  fa il  s afe s in corp ora te d in to  th e In fin it y  s yste m . T he E CU c onsta ntly
m onit o rs  th e a ccele ra to r p edal  s ensor v o lt a ge a nd th ro ttle  p osit io n s ensor v o lt a ges to  e nsure  th e s ig nals
a re  n ot e xcessiv e ly  h ig h o r lo w  d ue to  d am aged s ensors , s hort c ir c uit s , o r b ro ken w ir e s. T he E CU a ls o
p erfo rm s s elf- d ia gnostic s to  e nsure  th e e le ctro nic  th ro ttle  is  fo llo w in g d esir e d D BW _Targ et p ro perly , th at
t h e D BW  th ro ttle  c ontro l  m oto r is  n ot u sin g e xcessiv e  e nerg y to  m ove  th e th ro ttle , a nd w atc hin g to  s ee
t h at a ll  th e re dundant s ensors  a re  w ork in g to geth er a s e xpecte d. If  a ny o f  th ese c ondit io ns a re
d ete rm in ed to  b e a bnorm al  o r u nsafe , th e E CU c an s hut th e e ngin e d ow n to  p re ve nt u nin te nded e ngin e
a ccele ra tio n.  T his  e rro r w ill  re set w hen th e ig nit io n k ey is  c ycle d. 
						

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CRUIS E C O NTR O L
C urre ntly , a  c ru is e c ontro l  fe atu re  is  n ot s upporte d w it h  th e
A EM  In fin it y . H ow eve r, th e m ult i- fu nctio nal  s te erin g w heel
b utto ns a re  tra nsm it te d o ve r th e P ors che C AN b us a nd a re
a va ila ble  fo r m is cella neous p urp oses d escrib ed b elo w . T here
a re  5  b utto ns: E nable , C ancel,  S et, A ccele ra te + , a nd
D ecele ra te - (a s s how n).  
N ote : C ru is e  e nable  (c h annel  C C_E nable ) m ust b e
a ctiv e  (in dic a te d b y a n illu m in ate d g re en c ru is e  lig ht o n
t h e d ash ) fo r th e b elo w  fe atu re s to  b e fu nctio nal.  T o
a ctiv a te   C C_E nable , s im ply  tu rn  c ru is e  c o ntr o l o n (p re ss th e o ute r b utto n o n th e c ru is e
m ultifu nctio n s w itc h  in  o nce ). 
C an cel B utto n
T he C ancel  b utto n (p ush d ow n) n ow  e ngages th e 3 -s te p re v lim it e r c hannel  “C C_C ancel” . A  3 -s te p re v
l im it e r is  a  s im plifie d tra ctio n c ontro l  b ased s yste m  th at u ses e ngin e a nd v e hic le  s peed o r la unch tim er
i n puts  to  lim it  th e R PM  o f  th e e ngin e. T o o pera te , fir s t b e s ure  th e 3 S te pS wit c h ta ble  is  s et to  re cogniz e
t h e “m om enta ry ” C ancel  b utto n, a s s how n. S et th e 3 S te pTarg etF uel  a nd/o r th e 3 S te pTarg etS park  ta ble ’s
f ir s t (0  M PH) c ell  to  th e d esir e d la unch R PM . W hen th e C ancel  b utto n is  h eld  d ow n, th e E M S w ill  lim it
t h e e ngin e’s  c orre spondin g R PM . O nce th e c ar is  la unched a nd th e E M S b egin s to  re gis te r v e hic le
s peed, th e R PM  lim it  c an th en b e ta ilo re d to  p re ve nt w heel  s pin  u sin g th ese ta ble s.
R esu m e B utto n
T he R esum e b utto n (p ush u p) is  u sed a s a n A EM  tra ctio n c ontro l  s w it c h. N ote : T he  P SM  O ff  b utto n
i s  fu nctio nal. T he P ors c h e P SM  s y ste m  is  s till a ctiv e  w ith  th e A EM  In fin ity  s y ste m  a nd c a n b e
d is a ble d b y p re ssin g th e  P SM  O ff  b utto n.  T he la tc hin g R esum e b utto n c hanges th e
T C _S lip Targ etT rim  1 -a xis  lo okup ta ble  (s how n). S im ult a neously , th e lo w  fu el  lig ht o n th e d ash w ill  b lin k
t o  in fo rm  th e d riv e r th e s ta tu s o f  th e p ro gra m mable  A EM  tra ctio n c ontro l.  N orm ally  th is  ta ble  is  u sed w it h
a  m ult ip le  p osit io n s w it c h. H ow eve r, b ecause th e R esum e b utto n is  e it h er O FF (0 ) o r O N (1 ), o nly  th e
f ir s t tw o c ells  o f  th e ta ble  a re  u sed. T w o p ossib le  tra ctio n s cenario s, fo r e xam ple , c ould  b e O N/O FF o r
a ggre ssiv e /n onaggre ssiv e . T o u se th is  fe atu re , it  m ust b e e nable d in  In fin it y  T uner: W iz ard  |  S etu p w iz ard
|   T ra ctio n C ontro l  |  T ra ctio n C ontro l  E nable . 
						

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A ccel/D ecel B utto ns
T he s te erin g w heel’s  A ccele ra te +  a nd D ecele ra te - (p ull  to w ard s, p ush a w ay) m om enta ry  b utto ns
i n cre m ent a nd d ecre m ent th e m ap s w it c hin g fu nctio n “C C_M odeS wit c h”. T his  fe atu re  is  e xtre m ely
f le xib le  a s it  c an b e u sed to  s w it c h V E ta ble s, ig nit io n m aps, la m bda ta rg ets , a nd b oost le ve ls . 
N ote s:
W hen th e A ccele ra te +  o r D ecele ra te - b utto n is  d epre ssed (o r w hen K eyO n o ccurs ) th e ta chom ete r
d is pla ys 1 K , 2 K , 3 K , 4 K , 5 K , 6 K , 7 K , o r 8 K  m om enta rily  re pre sentin g th e c urre ntly  s ele cte d v a lu e o f
M odeS wit c h. B ecause o f  th e P ors che 9 97.1  T urb os  ta chom ete r ra nge, 1 –8 a re  th e o nly  v a lid  v a lu es (9 –
1 2 a re  n ot u sed fo r th is  a pplic atio n b ut c an b e u sed if  u sin g a n e xte rn al  1 2 p osit io n s w it c h). 
I n  o rd er fo r th e c urre nt M odeS wit c h m ode to  b e re calle d b etw een k ey o ff/ k ey o n c ycle s, th e  K ey O ff
C om mit   fu nctio n m ust b e e nable d in  th e tu nin g p re fe re nces s ectio n o f  th e w iz ard .
F or s afe ty  p re cautio ns, th e A EM  b ase s essio n file s c om e s ta ndard  w it h  th e V E ta ble s, ig nit io n m aps,
l a m bda ta rg ets , a nd b oost ta ble s a ll  s et th e s am e b ecause th e A ccele ra te +  o r D ecele ra te - b utto n c ould
b e m is ta kenly  b um ped.  
						

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W it h  th e A EM  In fin it y , tra ctio n c ontro l  a nd th e re v lim it e r c an b e c ontro lle d u sin g a ny c om bin atio n o f
D BW , fu el  c ut, ig nit io n c ut, o r ig nit io n re ta rd .
I n  o rd er to  u se th is  fe atu re , c are  m ust b e ta ken in to  a ccount w hen s ettin g u p th e ta ble s a nd tu nin g. E nte r
t h e n um ber o f  th e ta ble  in to  th e c orre spondin g m ode s ele ctio n ta ble  fo r e ach fe atu re . 
						

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CAN B US
T he A EM  In fin it y  E M S fo r th e P ors che 9 97.1  s upports  th e m ajo rit y  o f  th e C AN fe atu re s in clu din g:
T achom ete r, O il  T em pera tu re  G auge, O il  P re ssure  G auge, C oola nt T em pera tu re  G auge, A /C  R equest
B utto n, S port B utto n, S te erin g A ngle , S te erin g R ate , B oost P re ssure , C oola nt F an C ontro l,  W heel
S peed S ensors , O il  P re ssure  W arn in g, R educed E ngin e P ow er W arn in g, M IL  W arn in g, C ru is e L ig ht, a nd
F uel  C onsum ptio n (M PG )
W it h  k ey o n e ngin e o ff,  th e d ash lig hts  (c ru is e, c heck e ngin e, A BS, h ig h c oola nt te m p, lo w  fu el,
n otific atio n p re sent) w ill  b e in   te st  m ode a nd w ill  a ll  b e illu m in ate d.  T his  lig ht te st fu nctio n is
a ssocia te d w it h   S yncS ta te  in  th e In fin it y  a nd w ill  tu rn  o ff  w hen  S ync S ta te  h as a  v a lu e o f  1  (e ngin e
r u nnin g).  If  a t a ny tim e th e s yste m  lo ses s ync, th e lig hts  w ill  illu m in ate  in  te st m ode.
R ath er th an O BD2 d ia gnostic s, th e  C heck E ngin e lig ht is  n ow  d edic ate d to  th e A EM  “M IL O utp ut”
f e atu re . T he A EM  M IL O utp ut a ctiv a te s if  a ny o ne o f  th e fo llo w in g in puts  a re  in  a n e rro r s ta te : a ir  te m p,
b aro  p re ssure , c oola nt te m p, e xhaust b ack p re ssure , fu el  p re ssure , U EG O # 1, U EG O # 2, M AF a nalo g,
M AF d ig it a l,  M AP, o il  p re ssure , o r th ro ttle  p osit io n. If  a ny o f  th ese s ensors  a re  n ot u sed, th ey s hould  b e
t u rn ed O FF in  th e W iz ard  to  a vo id  a ny fa ls e re adin gs. T o a ctiv a te  th e M IL O utp ut fe atu re , g o to  th e
W iz ard  a nd c heck “E nable  M IL  O utp ut” in  A dva nced S etu p >  E ngin e P ro te ctio n.
T he fo llo w in g c hannels  o n th e P ors che C AN b us a re  a va ila ble  fo r lo ggin g. T he A EM  tra ctio n c ontro l
u tiliz es th e C AN w heel  s peed s ensors : C AN_F LW S [M PH], C AN_F R W S [M PH], C AN_R LW S [M PH],
C AN_R RW S [M PH]. T he fo llo w in g s te erin g c hannels  a re  o nly  fo r d ata  lo ggin g: C AN_S te erin gA ngle ,
C AN_S te erin gR ate .
T he fu el  le ve l  s ender o n th e P ors che 9 97.1  tu rb o o nly  a ctu ally  m easure s th e fir s t 1 /2  to  2 /3  o f  a  ta nk d ue
t o  th e s addle  ta nk d esig n to  c le ar th e fr o nt d riv e -tra in .  T he s to ck D M E re la ys a  fu el  c onsum ptio n ra te  v ia
C AN to  th e fa cto ry  d ash.  F ro m  h ere , th e d ash c alc ula te s fu el  le ve l  a nd fu el  m ile age.  T he A EM  In fin it y
d oes tra nsm it  th is  m essage o n th e C AN b us.  T he fu el  c onsum ptio n ra te  is  c alc ula te d b ased o n in je cto r
d uty  c ycle , in je cto r s iz e, e ngin e s peed, e tc .  B ecause th ere  a re  m any u ser c onfig ura ble  v a ria ble s, if  th e
f u el  m ile age n ot a ccura te , u sers  c an trim  th e flo w  ra te  b ein g tra nsm it te d b y u sin g th e trim  c hannel
 C AN_F uelF lo w Scale r .  A  v a lu e o f  0 .0 007 s hould  b e c lo se o n a  s to ck c ar.