check engine ACURA NSX 1997 Service Service Manual
[x] Cancel search | Manufacturer: ACURA, Model Year: 1997, Model line: NSX, Model: ACURA NSX 1997Pages: 1503, PDF Size: 57.08 MB
Page 1468 of 1503

Immobilizer Syste m
Problem s an d Replacemen t Part s
Parts Set :
A: Blan k ke y
B: Immobilize r contro l uni t
Maste r ke y
Learnin g ke y
C : Immobilize r receive r
D : Ignitio n switc h wit h immobilize r receive r
Immobilize r contro l uni t
Maste r ke y
Learnin g ke y
E: EC M
F: Doo r ke y cylinde r
Maste r key s fo r door s ope n o r locke d
G : Ignitio n switc h wit h immobilize r receive r
Immobilize r contro l uni t
Maste r ke y
Learnin g ke y
Doo r ke y cylinder s
Trun k ke y cylinde r
Glov e bo x ke y cylinde r
NOTE:
The immobilize r syste m ca n stor e u p t o fiv e ke y codes .
I f i t i s necessar y t o rewrit e th e immobilize r contro l uni t t o lear n a ne w key , th e deale r need s th e customer' s vehicle , al l
it s maste r key s an d vale t keys , it s learnin g key , an d th e Hond a PG M Teste r equippe d wit h a n immobilize r progra m
card . An y ke y tha t i s no t learne d durin g rewritin g wil l n o longe r star t th e engine .
I f th e custome r ha s los t hi s key , an d canno t star t th e engine , contac t Acur a Custome r Relation s o r Roadsid e Assistance .
Befor e Testing :
Du e t o th e actio n o f th e immobilize r system , th e engin e take s slightl y mor e tim e t o star t tha n th e engin e o f a vehicl e
withou t a n immobilize r system .
Whe n th e syste m is normal , an d th e prope r ke y i s inserted , th e indicato r ligh t come s o n fo r tw o seconds , the n i t wil l g o
off .
If th e indicato r start s t o blin k afte r tw o seconds , o r i f th e engine does no t start , repea t th e startin g procedure .
— If th e engin e stil l doe s no t start , perfor m th e immobilize r contro l uni t inpu t tes t an d transponde r an d immobilize r
receive r test .
I f al l th e inpu t test s an d transponde r an d immobilize r receive r tes t prov e OK , chec k th e EC M (se e sectio n 11 ).
— If th e EC M is OK , th e immobilize r contro l uni t mus t b e faulty ; replac e th e immobilize r contro l unit , maste r ke y an d
learnin g ke y together , an d the n rewrit e th e EC M wit h th e Hond a PG M Tester .
— If th e EC M is faulty , substitut e a known-goo d ECM , an d recheck . However , sinc e th e known-goo d EC M ha s a differ -
ent cod e store d int o it , i t mus t b e rewritte n wit h th e Hond a PG M Tester . Otherwise , th e engin e wil l no t start .
Proble m Parts se t
Maste r o r vale t ke y ha s bee n los t o r additiona l maste r o r vale t ke y i s required .
Al l maste r an d vale t key s hav e bee n lost .
Learnin g ke y ha s bee n lost .
Immobilize r receive r doe s no t work .
Immobilize r contro l uni t doe s no t work .
ECM doe s no t work .
Ignitio n switc h doe s no t work .
Doo r ke y cylinde r ha s bee n broken . PCM-Teste
r
required?
A
A x 2, and B
B
C
B
E
D
F(G )
YES
YES
YES
NO
YES
YES
YES
NO (YES)
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Page 1470 of 1503

Immobilizer Receiver and Transponder (Key) Test
IMMOBILIZER
CONTROL
UNIT
Does the immobilizer indi-
cator blink?
Perform the control unit input
test.
Try to start the engine with another
master key or valet key from this
vehicle.
Does the engine start?
Replace the transponder (igni-
tion key).
3P CONNECTOR
"B"
Does the engine crank?
Rewrite the immobilizer control
unit and the ECM with the PGM
Tester.
Check for an open in the BRN
wire between the immobilizer
control unit and the ECM. If the
wire is OK, rewrite the ECM with
the PGM Tester.
Does the engine start?
Immobilizer system is OK now.
Wire side of
female terminals
Is there continuity?
Short in the shielded wires
between the immobilizer receiver
and the immobilizer control unit.
Replace the wire harness.
Measure resistance between the
B1 and B3 terminals of the 3P con-
nector.
Is there about 15 ohms?
Faulty receiver or open in the
shielded wires between the immo-
bilizer receiver and immobilizer
control unit.
Replace the immobilizer control
unit.
1. Turn the ignition switch ON (II).
2. Check that the immobilizer
indicator light starts blinking
after two seconds.
1. Turn the ignition switch OFF.
2. Disconnect the 3P connector
"B" from the immobilizer con-
trol unit.
3. Check for continuity between
the B1 and B2, and the B3 and
B2 terminals of the 3P connec-
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