Honda Civic 2002-2003 Service Manual page 539

EPS Components
EPS Indicator Circuit Troubleshooting (cont'd)
12. Turn the ignition switch OFF.
13. Disconnect EPS control unit connector C (20P).
14. Turn the ignition switch ON (II).
Does the EPS indicator come on?
YES-Repair short to ground in the YEL/BLU wire
between the gauge assembly and the EPS control
unit, or replace the bulb circuit board in the gauge
assembly .•
NO-Goto step 15.
15. Measure the voltage between EPS control unit
connector C (20P) terminal No. 10 and body ground.
EPS CONTROL UNIT CONNECTOR C 120PI
VT3 IBLU/ORN}
Wire side of female terminals
Is there battery Voltage?
YES-Go to step 16.
NO-Repair open in the wire between EPS control
unit connector C (20P) and the No.1 0 (7.5A) fuse .•
17-48
16. Measure the voltage between EPS control unit
connector A (2P) terminal No.1 and body ground.
EPS CONTROL UNIT CONNECTOR A 12P)
Wire side offemale terminals
Is there battery voltage?
YES-Go to step 17.
NO-Check for a blown No. 18 (60A) fuse in the
under-hood fuse/relay box or open/short in the
WHT/BLU wire between the under-hood fuse/relay
box and the EPS control unit..
17. Turn the ignition switch OFF.
18. Reconnect EPS control unit connector A (2P).
19. Turn the ignition switch ON (II).
20. Measure the voltage between EPS control unit
connector C (20P) terminal No.8 and body ground.
EPS CONTROL UNIT CONNECTOR C 120P)
SCS IBRN)
2 3
11 13
=
Wire side of female terminals
Is there about 10 V?
YES-Check for loose or poor connections at the
EPS control unit. If the connections are good,
substitute a known-good EPS control unit. If the
symptom/indication goes away, replace the
original EPS control unit and recheck .•
NO-Repair short to ground in the BRN wire
between the data link connector and the EPS
control unit..