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14 - 36
FUEL SYSTEM
•
PARK/NEUTRAL SAFETY SWITCH
Fig. 23 Transmission Electrical Connections
ON BOARD DIAGNOSTICS
The Single Board Engine Controller (SBEC) has
been programmed to m o n i t o r several different cir-
cuits of the fuel injection system. This m o n i t o r i n g is
called O n B o a r d Diagnosis. I f a problem i n a m o n i -
tored c i r c u i t is sensed often enough t o indicate an ac-
t u a l problem, i t s f a u l t code i s stored i n the SBEC for
e v e n t u a l display t o t h e service technician. I f t h e
problem is repaired or ceases t o exist, the SBEC can-
cels t h e F a u l t Code after 50 t o 100 vehicle key on/off
cycles.
FAULT CODE DESCRIPTION
W h e n a f a u l t code appears (either b y flashes of the
check engine l a m p or b y w a t c h i n g t h e Diagnostic
Tool), i t indicates t h a t t h e SBEC has recognized a n
a b n o r m a l signal i n t h e system. F a u l t codes indicate
the results of a f a i l u r e b u t never identify the failed
component directly.
To o b t a i n f a u l t codes f r o m t h e Check Engine L i g h t ,
cycle t h e i g n i t i o n k e y on-off-on-off-on
w i t h i n a five
second period. C o u n t t h e flashes to determine t h e
code. T h e l i g h t w i l l flash t h e f i r s t d i g i t o f the code,
pause, t h e n flash t h e second d i g i t o f the code. For ex-
ample F a u l t Code 24 w o u l d be displayed by t w o
flashes a pause a n d four flashes.
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