Honda Civic 2002-2003 Service Manual page 339

Idle Control System
DTe Troubleshooting (cont'd)
11. Connect lAC valve 3P connector terminal No.3 to
body ground with a jumper wire.
lAC VALVE 3P CONNECTOR
IACV IBLK/REDI
JUMPER WIRE
Wire side of female terminals
12. Check for continuity between ECM connector
terminal A12 and body ground.
ECM CONNECTOR A 131PI
Wire side of female terminals
Is there continuity?
YES-Go to step 13.
NO-Repair open in the wire between the lAC valve
and the ECM (A121 .•
13. Reconnect the lAC valve 3P connector.
14. Turn the ignition switch ON (III.
11-132
15. Measure voltage between body ground and ECM
connector terminal A 12.
ECM CONNECTOR A 131PI
9
2223
=
Wire side of female terminals
Is there battery voltage?
YES-Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-6). If the symptom/indication
goes away with a known-good ECM, replace the
original ECM .•
NO-Replace the lAC valve .•
•