TROUBLESHOOTING [ENGINE CONTROL FS]
DTC
P0400
EGR flow malfunction
DESCRIPTION
• DTC P0400 indicates an EGR valve/flow failure
[Possible Cause]
• Damaged EGR valve
• Damaged PCM
• Damaged EGR boost sensor
• Damaged harness connector
• Damaged EGR boost solenoid valve
• Damaged harness
• Restriction in exhaust system
STEP
INSPECTION
ACTION
1
OUTPUT ALL DTCS
• Verify EGR boost solenoid valve
connection and repair as necessary.
• Output all continuous memory, KOEO and
KOER self-test DTCs.
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0 1 -0 1 A ENGINE ON-BOARD
DIAGNOSIS [FS], Rettieving DTCs
Procedure
•
Are any other DTCs displayed on NGS
tester?
Yes
Go to DTC charts and PROCEED as required.
No
Go to next step.
2
CHECK FOR UNMETERED AIR LEAKS
• Carefully inspect following areas for
potential air leaks:
• Hoses connecting to MAF sensor
assembly.
• Hoses connecting to throttle body.
• Intake manifold gasket leaks.
• Positive crankcase ventilation (PCV)
disconnected.
• Vacuum lines disconnected.
• Improperly seated engine oil dipstick
and tube.
• Exhaust leaks at flanges and gaskets.
•
Are there any air leaks?
Yes
Air leaks located.
SERVICE source of air leak.
RESET PCM to completely clear DTCs.
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After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No
Go to next step.
3
CHECK CYLINDER COMPRESSION
• Check cylinder compression.
o - 0 1 -1 0 A COMPRESSION INSPECTION
[FS]
•
Are cylinder compression readings
within specification?
Yes
Go to next step.
No
SERVICE as necessary.
RESET PCM to completely clear DTCs.
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After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
4
CHECK OPERATION OF EGR VALVE
• Key on and listen for initialization noise
(clicks) of EGR valve by using screwdriver
or soundscope.
Note
• EGR valve initialization is closing action of
valve observed before and after engine is
started, and when engine is stopped.
•
Does EGR valve initialization noise
heard?
Yes
Go to step 9.
No
Go to next step.
5
CHECK POWER CIRCUIT TO EGR VALVE
• Key off.
• EGR valve disconnected.
• Key on, engine off.
• Measure voltage between power circuit
and chassis ground at EGR valve vehicle
harness connector.
•
Is EGR valve power voltage greater than
10.5 volts?
Yes
Go to next step.
No
SERVICE open in EGR valve power circuit.
RECONNECT all components.
RESET PCM to completely clear DTCs.
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After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
6
CHECK RESISTANCE OF EGR VALVE
• Key off.
• EGR valve disconnected.
• Measure resistance of EGR valve coils.
• Is each resistance approximately 22
ohms?
Yes
Go to next step.
No
REPLACE EGR valve.
RECONNECT all components.
RESET PCM to completely clear DTCs.
a-
After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
01 - 0 1 A -5 4
Содержание MX-6 1998
Страница 1: ......
Страница 501: ...STARTING SYSTEM 3 If not as specified replace the starter interlock switch 01 19 3...
Страница 803: ...MANUAL TRANSAXLE W 6 U 5 1 5 W A C 05 15 7...
Страница 934: ...CONTROL SYSTEM CONTROL SYSTEM STRUCTURAL VIEW W6U740WA0 07 40 2...
Страница 983: ...SERVICE TOOLS 08 60 SERVICE TOOLS 08 RESTRAINTS S S T 08 60 1 08 RESTRAINTS SST 08 60 1...
Страница 1005: ...TROUBLESHOOTING POWER DOOR LOCK SYSTEM From previous page Go to next page W 6 U 9 0 1 W H 3 09 01E 7...
Страница 1168: ...SEATS 4A 4 If not as specified replace the power seat switch 2A 2B t 4B 3A 1C 1A 1F W6U913WA9 09 13 7...