Dtc (Diagnostic Trouble Codes); Reading The Dtc; General Troubleshooting Information - Honda EP3 Service Manual

General Troubleshooting Information
DTC (Diagnostic Trouble Codesl
The self-diagnostic function of the SRS system allows it
to locate the causes of system problems and then store
this information in memory. For easier troubleshooting,
this data can be retrieved via a data link circuit.
. W h e n y o u t u r n t h e i g n i t i o n s w i t c h O N ( l l ) , t h e S R S
indicator will come on. lf it goes off after 6 seconds,
the system is normal.
. lf there is an abnormality, the svstem locates and
defines the problem, stores this information in
memory, and turns the SRS indicator on. The data
w i l l r e m a i n i n t h e m e m o r y e v e n w h e n t h e i g n i t i o n
switch is turned off or if the battery is disconnected.
. When you connect the Honda PG lM Tester to the 16P
d a t a l i n k c o n n e c t o r ( D L C ) t o s h o r t t h e S C S t e r m i n a l ,
a n d t u r n t h e i g n i t i o n s w i t c h O N ( l l ) . t h e S R S i n d i c a t o r
will indicate the diagnostic trouble code (DTC) by the
n u m b e r o f b l i n k s .
. When you connect the Honda PGM Tester to the 16P
data link Connector (DLC), you can retrieve the DTC in
t h e H o n d a S y s t e m s " S R S " m e n u .
. After reading and recording the DTC, proceed with
the troubleshooting procedure for th is code.
Precautions
. U s e o n l y a d i g i t a l m u l t i m e t e r t o c h e c k t h e s y s t e m . l f
it's not a Honda multimeter, make sure its output is
1 0 m A ( 0 . 0 1 A ) o r l e s s w h e n s w i t c h e d t o t h e s m a l l e s t
v a l u e i n t h e o h m m e t e r r a n g e , A t e s t e r w i t h a h i g h e r
o u t p u t c o u l d d a m a g e t h e a i r b a g c i r c u i t o r c a u s e
a c c i d e n t a l a i r b a g d e p l o y m e n t a n d p o s s i b l e i n j u r y .
. Whenever the ignition switch is ON (ll), or has been
turned OFF for less than 3 minutes, be careful not to
b u m p t h e S R S u n i U t h e a i r b a g s c o u l d a c c i d e n t a l l y
d e p l o y a n d c a u s e d a m a g e o r i n j u r i e s .
. Before you remove the SRS harness, disconnect the
driver's airbag connector. the front passenger's
airbag connector, both side airbag connectors, both
seat belt buckle tensioner connectors, and both seat
b e l t t e n s i o n e r c o n n e c t o r s .
. Make sure the battery is sufficiently charged. lf the
battery is dead or low, measuring values won't be
correct.
. Do not touch a tester probe to the terminals in the
SRS unit or harness connectors, and do not connect
t h e t e r m i n a l s w i t h a j u m p e r w i r e . U s e o n l y t h e
backprobe set and the Honda PGM Tester. Backprobe
spring loaded lock type connectors correctly.
Reading the DTC
When the SRS indicator is on, read the DTC using either
of the following methods:
PGM Tester "SRS" Menu Method:
Connect the Honda PGM Tester {A) to the 16P data link
connector {DLC)(B), and follow the Tester's Drompts in
t h e
" S R S "
m e n u .
lf the Tester indicates no DTC, no communication. DTC
3-6 to 3-'10, DTC 4-6 to 4-10, DTC 9-1, or DTC 9-2,
double-check by using the "SCS" menu method.
(cont'd)
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