Honda S2000 Service Manual page 914

Lights-on, Key-in, Seat Belt Reminder System
System Input Test (cont'dl
With the connectors connected, back probe the connectors and make these input tests.
. l f a n y t e s t i n d i c a t e s a p r o b l e m , f i n d a n d c o r r e c t t h e c a u s e , t h e n r e c h e c k t h e s y s t e m .
. lf all the input tests prove OK, the gauge assembly must be faulty; replace it.
Cavity
Wire
Test condition
Test: Desir€d resull
Possible cause il result is not obtained
B 4 YEL
lgnition switch
o N ( l r )
Check for voltage to ground:
There should be battery voltage.
. B l o w n N o . 5 ( 7 . 5 A ) f u s e i n t h e
under-dash fuse/relay box
. An oDen in the wire
B 5 WHT/RED U n d e r a l l
conditions
Check tor voltage to ground:
There should be battery voltage.
Blown No. 25 (7.5 A) fuse in the
under-dash f use/relay box
An oDen in the wire
B 3 RED/BLK
Combination
light switch
O N
Check for voltage to ground:
There should be battery voltage.
Blown No. 23 (10 A) fuse in the
under-dash fuse/relay box
Faulty taillight relay
Faulty combination light switch
An ooen in the wire
RED,A/VHT lgnition key is
inserted into
t h e i g n i t i o n
switch
Check for voltage to ground:
There should be 1 V or less.
Faulty ignition key switch
P o o r g r o u n d ( G 4 0 1 )
An open in the wire
lgnition key
not in iqnition
Check for voltage to ground.
There should be 5 V or more.
Faulty ignition switch.
Short to qround in the wire.
A'1
BLU/RED
lgnition switch
O N ( l l ) a n d
driver's seat
belt unbuckled
Check for voltage to ground:
There should be
'1
V or less.
Faulty driver's seat belt switch
P o o r g r o u n d ( G 6 0 1 )
An open in the wire
lgnition switch
O N ( l l ) a n d
driver's seat
belt buckled
Check for voltage to ground.
There should be 5 V or more.
Faulty driver's seat belt switch.
Short to ground in the wire.
B8
BLK U n d e r a l l
conditions
Check for continuity to ground:
There should be continuiw.
. P o o r g r o u n d ( G 5 0 1 )
. An oDen in the wire
Ito
G R N
Driver's door
oDen
Check for voltage to ground:
There should be 1 V or less.
Faulty driver's door switch
An ooen in the wire
Driver's door
ctoseo
Check for voltage to ground.
There should be 5 V or more.
. Faulty driver's door switch.
. Short in the wire.
B 4 YEL
lgnition switch
O N ( l l ) a n d t r i p
reset button
oresseo
Check the beeper operation.
The beeper should come on.
Faulty beeper
P o o r g r o u n d ( G 5 0 1 )
An open in the wire
Faultv qauoe assemblv
B 5 WHT/RED
B 8 BLK
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