Honda 2004 Odyssey Service Manual page 557

EGR System
DTC Troubleshooting (cont'd)
8. Measure voltage between EGR valve 6P connector
terminals No. 4 and No. 6.
EGR VALVE 6P CONNECTOR
EGR (PNK)
EGR (BLU/RED)*
Wire side of female terminals
Is there battery voltage?
YES Substitute a known-good PCM, and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
NO Go to step 9.
9. Turn the ignition switch OFF.
10. Turn the ignition switch ON (II).
11. Measure voltage between EGR valve 6P connector
terminals No. 2 and No. 3.
EGR VALVE 6P CONNECTOR
SG2
(GRN/BLK)
SG2
(GRN/YEL)*
Wire side of female terminals
Is there about 5 V ?
YES Go to step 13.
NO Go to step 12.
11-248
GND (BLK)
VCC2
(YEL/BLU)
12. Measure voltage between PCM connector
terminals C18 and C28.
PCM CONNECTORS C (31P)
SG2 (GRN/BLK)
SG2 (GRN/YEL)*
VCC2 (YEL/BLU)
Wire side of female terminals
Is there about 5 V ?
YES Repair open in the wire between the EGR
valve and the PCM (C18, C28).
NO Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
13. Turn the ignition switch OFF.
14. At the sensor side, measure resistance between
EGR valve 6P connector terminals No. 1 and No. 2.
EGR VALVE 6P CONNECTOR
EGRP
Terminal side of male terminals
Is there continuity or resistance of 100 k
more?
YES Replace the EGR valve.
NO Go to step 15.
SG2
or