Mazda MX-6 1998, Руководство по ремонту

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TROUBLESHOOTING [ENGINE CONTROL FS]
5
CRANKS NORMALLY BUT WILL NOT START
DESCRIPTION
• Starter cranks engine at normal speed but engine will not run
• Refer to “ ENGINE STALLS” if this symptom appears after engine stall
• Fuel in tank
• Battery in normal condition
POSSIBLE
CAUSE
• Operation of immobilizer system
• Air leak from intake air system
• Improper operation of IAC valve
• No signal from crankshaft position sensor due to sensor, related wire or incorrect installation
• Spark leak from hightension leads
• PCV valve malfunction
• Restriction in exhaust system
• Open or short circuit in fuel pump and related harness
• Fuel pump mechanical malfunction
• Fuel injector clogged
• No battery power supply to PCM
• Open PCM ground or vehicle body ground
• EGR valve malfunction
• Low engine compression
• Vacuum leak
• Poor fuel quality
• Air cleaner restriction
• Disconnected electrical connector disconnection
• Inadequate fuel pressure
• Fuel leak from injector
• Purge solenoid valve malfunction
Warning
Following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read
following warnings before performing fuel system service:
• Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep
sparks and flames away from fuel.
• Fuel line spills and leaks are dangerous. Fuel can ignite and cause serious injuries or death
and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE
REPAIR PROCEDURE” and “AFTER REPAIR PROCEDURE” described in this manual.
w 0 1 -1 4 BEFORE REPAIR PROCEDURE
cr 0 1 -1 4 AFTER REPAIR PROCEDURE
STEP INSPECTION ACTION
1
Note
• The following test should be performed test
vehicles equipped with immobilizer system.
Skip this test and go to step 12 for vehicles
without immobilizer system.
Is following condition appeared?
• Engine is not completely started and DTC
P1624 is retreived.
Yes Go to step 3.
No Go to next step.
2
Is engine stalled after approx. 2 seconds
since engine is started?
Yes Go to next step.
No
Immobilizer system is okay.
3 Is immobilizer unit connector securely
connected to immobilizer unit?
Yes Go to next step.
No Connect immobilizer unit connector securely.
Return step 2.
4 Does security light flash and indicate following
immobilizer DTCs?
DTC: 0 1 ,0 2 , 03, 11,21
Yes
Go to “ON BOARD DIAGNOSTIC FUNCTION” of
immobilizer system.
No Go to next step.
5 Does security light illuminate? Yes
Go to step
8
.
No Go to next step.
6
Does security light flush and indicate following
immobilizer system DTC after more than 135
seconds after ignition switch turned ON?
DTC: 24, 30
Yes
Go to “ON BOARD DIAGNOSTIC FUNCTION" of
immobilizer system.
No Go to nsxt step.
0 1 -0 1 A - 1 35