Honda Civic 1998 Service Manual page 1342

Troubleshooting
Y
Self-diagnostic Procedures
The self-diagnostic function of the sRs system allows it to locate the causes ot system
problems and to store this intorma-
tion in mem-ory. 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 | o n s w | t c h o N ( | | } , t h e s R s i n d i c a t o r w i | | c o m e o n . | f i t g o e s o f f a t t e r s i x s e c o n d s , t h e s y s
normar.
.
lf there is an abnormality, the system locates and defines the problem, stores this
information in memory. and turns
t h e s R s i n d i c a t o r | i g h t o n . T h e d a t a w i | | 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 s w i t c h i s t u r n e d o f ' o r i f
tery is disconnected.
. when you connect the scs service connector to the sewice check connector
(2P), and turn the ignition switch oN (ll)'
the SR3 indicator light will indicate the diagnostic trouble code
(DTC) by the number ol blinks'
. After reading and recording the DTC, proceed with the troubleshooting for this code'
Precautions
.
Use on|y a digita| mu|t|meter to check the system. |f it,s not a Honda multimeter,
make sure its output is 10 mA (0.01 A)
or less when switched to the smallest value in the ohmmeter range. A tester
with a higher output could damage the
airbag circuit or cause accidental airbag deployment and possible iniury'
r Whenever the ignition switch is oN (ll), or has been turned oFF for less than three minutes,
be caretul not to bump the
SRS unit; the airbags could accidentally deploy and cause damage or injuries'
.
Before vou remove the sRS main harness, disconnect the driver's airbag connector
(and the front passenger's airbag
connector).
. Make sure the battery is sufficiently charged (see section 23). 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 the terminals
with a jumper wire. Use only the backprobe set and the SCS service connector'
For backprobing spring-losded lock type connectors, refer to page 24-9'
v
Reading the DTC
When the SRS indicator light is on, read the DTC using one of these methods:
A. Connect the Honda PGM Tester to the 16P Data Link Connector
(DLC), and follow the tester's prompts' lf the tester
i n d i c a t e s n o D T c , d o u b | e - c h e c k b y j u m p i n g t h e s e r v i c e c h e c k c o n n e c t o r a n d w a t c h i n g t h e s R s i n d i c a t o r
next page).
I
HONDA PGM TESTER
DATA LINK CONNECTOR {16P)
v
2+1'