Mazda MX-6 1998, Workshop Manual

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TROUBLESHOOTING [ENGINE CONTROL FS]
STEP INSPECTION
ACTION
6 Check fuel injection control signal at
suspected faulty cylinder.
Is terminal voltage correct?
(Compare with normal cylinder)
Specification
B+
Yes Check fuel injector for following.
• Leakage.
• Injection volume.
No
Repair or replace.
2 Grayish white with specific plug
[TROUBLESHOOTING HINTS]
® Air/fuel mixture-insufficient fuel injection volume
Others
© Faulty spark plug
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.
D- 0 1 -1 4 BEFORE REPAIR PROCEDURE
tr 0 1 -1 4 AFTER REPAIR PROCEDURE
STEP
INSPECTION ACTION
1 Check spark plug for following.
• Heating value. Yes
Go to next step.
• Air gap.
Are they okay?
No Replace spark plug.
2 Check operation of fuel injector at suspected
faulty cylinder.
Is operation sound heard?
Yes Go to next step.
No Repair or replace.
3 Check fuel injector resistance at suspected
faulty cylinder.
Is resistance correct?
Yes Go to next step.
Specification
12— 16 k « [20 *C {68 °F}]
No Replace fuel injector.
4 Check fuel injector control signal at suspected
faulty cylinder.
Is terminal voltage correct?
(Compare with normal cylinder)
Specification
B+
Yes Check fuel injection volume at suspected faulty cylinder.
No Repair or replace.
01-01A -1 70