Mazda MX-5 1990 Workshop Manual page 212

F
TROUBLESHOOTING GUIDE
FUEL ODOR
• Gasoline odor in cabin
[TROUBLESHOOTING HINTS]
CD
Poor connection or damaged fuel system or evaporative emission control system
@ Charcoal canister overflow due to evaporative emission control system malfunction
STEP INSPECTION
2
Check if fuel leak or damage are visible at fuel
system and evaporative emission control system
3 Check if vacuum is felt at solenoid valve (purge
control) with engine running and throttle valve
opened (Neutral switch connector disconnected)
4
Apply 12V and ground to solenoid valve (purge
control) and check if air flows through valve
5 Try known good ECU
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F-68
ACTION
Yes Repair or replace
No Go to next step
Yes Go to next step
No Malfunction Code No. displayed
Check for cause (Refer to specified
check sequence)
"88" flashes
Check ECU terminal 1 F voltage
Voltage: Approx. 12V
(Ignition switch ON)
c::::>
If OK, replace ECU
9
If not OK, check wiring between
ECU and Self-Diagnosis Checker
Yes Go to Step 5
No Check for solenoid valve operating
sound in this condition
¢
If OK, check vacuum hoses for
clogging
¢
If not OK, go to next step
Yes Check ECU terminal 2X voltage
No Replace solenoid valve
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c:::r
page F-80
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page
F-128
c::r page F-127
L7'
page F-7
cr
page F-6
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L7'
page F-119
05UOFX-045