Honda 2004 Odyssey, Service Manual

Page: 560 / 2459

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＊０５
０２
０３
Ｓ０Ｘ４ＡＺ１Ｋ７７１０００９１４９１ＦＡＡＴ００
DTC P1491 ’01 Model:
YES
NO
YES
NO
YES
NO
YES
NO
11-251
EGR VALVE 6P CONNECTOR
EGR (PNK) GND (BLK)
EGR VALVE 6P CONNECTOR
SG2
(GRN/BLK)
VCC2
(YEL/BLU)
PCM CONNECTOR A (31P)
VCC2
(YEL/BLU) SG2
(GRN/BLK)
EGR Valve
Insufficient Lift
1. Reset the PCM (see page 11-4).
2. Start the engine. Hold the engine at 3,000 rpm with
no load (in Park or neutral) until the radiator fan
comes on.
3. Test-drive the vehicle under load for about 10
minutes. Try to keep the engine speed in the
1,700
2,500 rpm range.
4. Check for a Temporary DTC with the scan tool or
the HDS.
Go to step 5.
Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the EGR valve and at the PCM.
5. Turn the ignition switch OFF.
6. Disconnect the EGR valve 6P connector.
7. Start the engine, and let it idle.
8. Measure voltage between EGR valve 6P connector
terminals No. 4 and No. 6.
Substitute a known-good PCM, and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
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.
Go to step 13.
Go to step 12.
12. Measure voltage between PCM connector
terminals A28 and A30.
Repair open in the wire between the EGR
valve and the PCM (A28, A30).
Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
(cont’d)
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is T empor ar y DT C P1491 indicated?
Is ther e batter y voltage?
Is ther e about 5 V ?
Is ther e about 5 V ?
03/07/29 09:25:45 61S0X050_110_0251