Honda ACCORD HYBRID 2005 Service Manual page 323

DTC P0112: IAT Sensor 1 Circuit Low Voltage
1. Turn the ignition switch ON (II).
2. Check IAT SENSOR 1 in the DATA LIST w i t h the
HDS.
Is about 356 °F (180 °C) or higher, or 0.08 V or
less indicated?
Y E S — G o t o step 3.
NO—Intermittent failure, system is OK at this t i m e .
Check for poor connections or loose terminals at
IAT sensor 1 and the PCM. •
3. Turn the ignition switch OFF.
4. Disconnect the MAF sensor/IAT sensor 1 5P
connector.
5. Turn the ignition switch ON (II).
6. Check IAT SENSOR 1 in the DATA LIST w i t h the
HDS.
Is about 356 °F (180 °C) or higher, or 0.08 V or
less indicated?
Y E S — G o t o step 7.
NO—Go to step 11.
7. Turn the ignition switch OFF.
8. J u m p the SCS line w i t h the HDS.
9. Disconnect PCM connector D (17P).
10. Check for continuity between MAF sensor/IAT
sensor 1 5P connector terminal No. 2 and body
g r o u n d .
MAF S E N S O R / I A T S E N S O R 1 5P C O N N E C T O R
IAT1 (RED/YEL)
it)
Wire side of female terminals
Is there continuity?
Y E S — R e p a i r short in the w i r e between IAT
sensor 1 and the PCM (D9), then go to step 13.
N O — G o t o step 18.
11. Turn the ignition switch OFF.
12. Reconnect all connectors.
13. Replace the MAF sensor/IAT sensor 1 (see page
11-220).
14. Turn the ignition switch ON (II).
15. Reset the PCM w i t h the HDS.
16. Do the PCM idle learn procedure (see page 11-340).
17. Check for T e m p o r a r y DTCs or DTCs w i t h the HDS.
Are any Temporary DTCs or DTCs indicated?
Y E S — I f DTC P0112 is indicated, check for poor
connections or loose terminals at IAT sensor 1 and
the PCM, then go to step 1. If any other T e m p o r a r y
DTCs or DTCs are indicated, go to the indicated
D T C s troubleshooting.
NO—Troubleshooting is complete. •
18. Update the PCM if it does not have the latest
software, or substitute a k n o w n - g o o d PCM
(see page 11-6).
19. Check for Temporary DTCs or DTCs w i t h the HDS.
Are any Temporary DTCs or DTCs indicated?
Y E S — I f DTC P0112 is indicated, check for poor
connections or loose terminals at IAT sensor 1 and
the PCM, then go to step 1. If any other T e m p o r a r y
DTCs or DTCs are indicated, go to the indicated
D T C s troubleshooting.
NO—If the PCM w a s updated, t r o u b l e s h o o t i n g is
complete. If the PCM was substituted, replace the
original PCM (see page 1 1 - 2 1 9 ) . •
11-83