Honda ACCORD HYBRID 2005 Service Manual page 638

EGR System
D T C T r o u b l e s h o o t i n g ( c o n t ' d )
DTC P0406: EGR Valve Position Sensor
Circuit High Voltage
1. Turn the ignition switch ON (II).
2. Check the EGR VLS in the DATA LIST w i t h the HDS.
Is 4.88 V or more indicated?
Y E S — G o t o step 3.
NO—Intermittent failure, system is OK at this t i m e .
Check f o r poor connections or loose terminals at
the EGR valve and the P C M . H
3. Turn the ignition switch OFF.
4. Disconnect the EGR valve 6P connector.
5. Turn the ignition switch ON (II).
6. Measure voltage between EGR valve 6P connector
t e r m i n a l s No. 2 and No. 3.
E G R V A L V E 6 P C O N N E C T O R
S G 2 { G R N / Y E L } V C C 2 ( Y E L / B L U )
1 2 3
4
/
Wire side of female terminals
Is there about 5 V?
YES — G o t o step 8.
N O — G o t o step 7.
7. Measure voltage between PCM connector
terminals C12 and C13.
P C M C O N N E C T O R C (22P)
16 17
12
20
S G 2 ( G R N / Y E L )
13 14 15
22
V C C 2 ( Y E L / B L U )
Wire side of female terminals
Is there about 5 V?
YES—Repair open in the w i r e between the EGR
valve and the PCM (C12), then go t o step 10.
NO — G o t o step 14.
8. Turn the ignition switch OFF.
9. Replace the EGR valve (see page 11-404).
10. Turn the ignition switch ON (II).
11. Reset the PCM w i t h the HDS.
12. Do the PCM idle learn procedure (see page 11-340).
13. 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?
YES—If DTC P0406 is indicated, check f o r poor
connections or loose t e r m i n a l s at the EGR valve
and the PCM, then go t o step 1. If any other
T e m p o r a r y DTCs or DTCs are indicated, go t o the
indicated D T C s t r o u b l e s h o o t i n g .
NO—Troubleshooting is c o m p l e t e . •
14. 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).
15. 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?
YES—If DTC P0406 is indicated, check f o r poor
connections or loose terminals at the EGR valve
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 t o the
indicated D T C s t r o u b l e s h o o t i n g .
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 w a s substituted, replace the
original PCM (see page 1 1 - 2 1 9 ) . •
11-398