Dlc Circuit Troubleshooting - Honda S2000 Service Manual

DLC Circuit Troubleshooting
lf the ECM does not communicate with the OBD ll scan
tool, Honda PGM Tester, or l/M test equipment, do this
troubleshooti ng procedure.
1. Measure voltage between DLC terminal No.8 and
body ground.
DATA LINK CONNECTOR (DLC} I16P)
Wire side of female terminals
Is there battery voltage?
YES Go to step 2.
NO Repair open in the wire between DLC terminal
N o . 8 a n d t h e A C G S ( 1 5 A ) f u s e i n t h e u n d e r - h o o d
fuse/relay box.l
Measure voltage between DLC terminals No.8 and
N o . 1 2 .
DATA LINK CONNECTOR (DLCI
W i r e s i d e o f f e m a l e t e r m i n a l s
ls there battery voltage?
YES Go to step 3.
NO Repair open in the wire between DLC terminal
N o . 8 a n d b o d y g r o u n d { G 4 0 1 ) . I
4 .
5 .
3. Measure voltage between DLC terminals No.8 and
N o . 1 3 .
DATA LINK CONNECTOR IDLC) (16P}
Wire side of female terminals
ls there battety voltage?
YES Go to step 4.
NO Repair open in the wire between DLC terminal
N o . 8 a n d b o d y g r o u n d ( G 1 0 1 ) . I
Turn the ignition switch ON ( ll).
Measure voltage between DLC terminals No. 13 and
N o . 1 5 .
DATA LINK CONNECTOR {DLCI
Wire side of female terminals
ls there 8.5 V ot mote?
YES Go to step 10.
NO Go to step 6.
T u r n t h e i g n i t i o n s w i t c h O F F .
(cont'd)
6 .
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