Honda Civic 1998 Service Manual page 1228

lnterlock System
2 .
Control Unit Input Test
t . Disconnect the 8P connector from the interlock con-
t r o l u n r t .
I n s p e c t t h e c o n n e c t o r a n d s o c k e t t e r m i n a l s t o b e
sure they are all making good contact.
.
lf the terminals are bent, loose or corroded, repair
them as necessary, and recheck the system.
.
l f t h e t e r m i n a l s l o o k O K , m a k e t h e f o l l o w i n g
input tests at the connector.
lf a test indicates a problem, find and correct
the cause, then recheck the system.
-
l f a l l t h e i n p u t t e s t s p r o v e O K , s u b s t i t u t e a
known-good control unit, and recheck the sys-
tem. lf the check is OK, the control unit must
be faulty; replace it.
N O T E : l f t h e s h i f t l o c k s o l e n o i d c l i c k s w h e n t h e
ignition switch is turned ON (ll) and you step on the
brake pedal (with the shift lever in E), the shift lock
s y s t e m i s e l e c t r o n i c a l l y n o r m a l ; i f t h e s h i f t l e v e r
cannot be shifted from E, test the A//T gear position
switch. parking pin switch, and see section 14.
Key Interlock System:
Cavity
Wire
Test condition
Test: Desired result
Test: Desired result
Wire side of
female terminals
Possible cause if result is not obtained
INTERI-OCK
CONTROL UNIT
Reconnect the 8P connector to the interlock control unit.
Shift Lock System:
Cavity
Test condition Wire
Possible cause if result is not obtained
WHT/BLU
1
4
5
1
I
wHT sLr/glu wHrlneo
1
WHT/BLU
lgnition switch turned to
A C C ( l l a n d k e y p u s h e d ; n
C h e c k f o r v o l t a g e t o g r o u n d l
T h e r e s h o u l d b e b a t t e r y v o l t a g e .
Blown No. 48 (30 A) fuse in the under-
hood fuse/relay box
Blown No. 33 (7.5 Aifuse in the under
dash fuse/relay box
Faulty steering lock assembly
(key interlock solenoid)
An open in the wire
5
4
BLK
U n d e r a l l c o n d i t i o n s
Check for continuity to ground:
There sho(,ld be continuaty.
. Poor ground (G401, G402)
. An open in the wire
BLI(BLU
Shift lever in E
Check lor continuity to ground:
There should be continuity.
Poor ground {G401, G402)
Faulty M gear position switch
An open in the wire
2
YEL
lgnition switch ON (ll)
Check for voltage to ground:
There should be battery voltage.
' Blown No. 25 (7.5 A) fuse in the under
dash fuse/relay box
. An open in the wire
3
YEUBLK
l g n i t i o n s w i t c h O N ( l l )
C h e c k f o r v o l t a g e t o g r o u n d :
T h e r e s h o u l d b e b a t t e r y v o l t a g e .
B l o w n N o . 2 5 ( 7 . 5 A ) f u s e i n t h e u n d e r -
dash fuse/relay box
F a u l t y s h i f t l o c k s o l e n o i d
A n o p e n a n t h e w i r e
6
BLK/8LU
Shift lever In E C h e c k f o r v o l t a g e t o g r o u n d :
T h e r e s h o u l d b e 1 V o r l e s s .
Poor ground (G401, G402)
Faulty A,/T gear position switch
An open in the wire
I
WHT/RED
lgnition switch ON (ll)
Brake pedal depressed
C h e c k f o r v o l t a g e t o g r o u n d :
T h e r e s h o u l d b e 1 V o r l e s s .
Blown No. 52 (15 Alfuse in the under
hood fuserelay box
Faulty PCM
Faulty brake switch (see section 11)
Faulty throttle position {TP} sensor
{see section l1)
An open in the wire
l g n i t i o n s w i t c h O N ( l l )
B r a k e p e d a l a n d
accelerator depressed at
t h e s a m e t r m e
C h e c k f o r v o l t a g e t o g r o u n d :
T h e r e s h o u l d b e b a t t e r y v o l t a g e .
2 3 - 1 3 0