Honda Civic Service Manual page 263

PGM-FI System
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DTC Troubleshooting (cont'dl
DTC P0113: IAT Sensor Circuit High Voltage
1. Turn the ignition switch ON (ll).
2. Check the IAT with the scan tool.
ls 4'F (-20'C) or less (or L-Limit in Honda
mode ot PGM Tester) or 5 V indicated?
3 .
4.
YES-Go to step 3.
NO Intermitent failure, system is OK at this time.
Check for poor connections or loose terminals at
the IAT sensor and at the ECM.I
Turn the ignition switch OFF.
Disconnect the IAT sensor 2P connector.
Connect IAT sensor 2P connector terminals No. 1
a n d N o . 2 w i t h a j u m p e r w i r e .
IAT SENSOR 2P CONNECTOR
rJ--
:---
l ' l L l
-'_-l--_----r--_
sG2
I
rAT
{GRN/YEL)
I
IRED/YEL)
L ]
JUMPER WIRE
Wire side of female terminals
6 . 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 ) .
1 1 - 5 6
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7. Check the IAT with the scan tool.
ls - 4"F ( 20'C) or less (or L-Limit in Honda
mode ot PGM Tester) or 5 V indicated?
YES Go to step 8.
NO - Replace the IAT sensor.l
8. Turn the ignition switch OFF.
9 . R e m o v e t h e j u m p e r w i r e .
1 0 . C o n n e c t E C M c o n n e c t o r t e r m i n a l s A 1 0 a n d 8 1 7
w i t h a j u m p e r w i r e .
ECM CONNECTORS
A (31 P) B {24 P)
Wire side of female terminals
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 ) .
Check the IAT with the scan tool.
ls - 4"F ( 20"C) or less (or L-Limit in Honda
mode of PGM Tester) or 5 V indicated?
YES Update the ECM if it does not have the latest
software, or substitute a known-good ECI\4 then
recheck (see page 11-6). lf the symptom/indication
goes away with a known-good ECM. replace the
o r i g i n a l E C M . !
NO Repair open in the wire between the ECM
( A 1 0 , 8 1 7 ) a n d t h e I A T s e n s o r . I
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1 1 .
12.
JUMPER WIRE