check engine ACURA NSX 1997 Service Service Manual

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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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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