No.5 Engine Stalls-After Start/At Idle - Mazda 2002 6 Workshop Manual

NO.5 ENGINE STALLS-AFTER START/AT IDLE

5 ENGINE STALLS—AFTER START/AT IDLE
• Engine stops unexpectedly.
DESCRIPTION
• A/C system operation is improper
• Air leakage from intake-air system parts
• Purge solenoid valve malfunction
• Improper operation of IAC valve
• EGR valve malfunction
• No signal from CKP sensor due to sensor, related wire or wrong installation
• Vacuum leakage
• Engine overheating
• Low engine compression
• Spark leakage from high-tension leads
• Poor fuel quality
• PCV valve malfunction
• Air cleaner restriction
• Restriction in exhaust system
• Electrical connector disconnection
• Open or short circuit in fuel pump body and related harness
• No battery power supply to PCM or poor GND
• Inadequate fuel pressure
• Fuel pump body mechanical malfunction
• Fuel leakage from fuel injector
• Fuel injector clogging
• Ignition coil malfunction
POSSIBLE CAUSE
• Improper air/fuel mixture ratio control
• Improper valve timing
• Improper operation variable valve timing control system (L3-VE)
• Immobilizer system (PATS) and/or circuit malfunction (if equipped)
• Pressure regulator malfunction
Warning
The following troubleshooting flow chart contains the fuel system diagnosis and repair
procedures. Read the following warnings before performing the fuel system services:
• Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always
• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or
Caution
• Disconnecting/connecting quick release connector without cleaning it may possibly cause
Diagnostic procedure
STEP INSPECTION
1 Note
• The following test should be performed for
vehicles with immobilizer system. Go to
Step 10 for vehicles without immobilizer
system.
Connect WDS or equivalent to DLC-2.
Do following conditions appear?
• Engine is not completely started.
• DTC B1681 is displayed.
2 Does engine stall after approx. 2 seconds since
engine is started?
3 Is coil connector securely connected to coil?
TROUBLESHOOTING
keep sparks and flames away from fuel.
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.
(See F–17 BEFORE REPAIR
(See F–17 AFTER REPAIR
damage to fuel pipe and quick release connector. Always clean quick release connector
joint area before disconnecting/connecting, and make sure that it is free of foreign material.
PROCEDURE.)
PROCEDURE.)
RESULTS
Yes Both conditions appear:
Go to Step 3.
No Either or other condition appears:
Go to next step.
Yes Go to next step.
No Immobilizer systemis okay.
Go to Step 10.
Yes Go to next step.
No Connect coil connector securely.
Return to Step 2.
A6E398018881W07
ACTION
F–191
F