Evaporative System Test Procedure
1. Select the EVAP system test from the toolbox on the M-MDS display and follow the instructions.
2. Verify that all of the following PIDs are within the specifications at the pre-test confirmation screen.
PID SPECIFICATION
3. Start the engine.
4. Drive the vehicle or let the engine idle more than
20 min.
5. Turn ignition switch off, then turn it to the ON position again (Key On Engine Off).
6. Press the tick icon to start the test.
7. Verify that no DTCs present after the completion of the test.
If any test result is indicated with red, diagnose the problem using the following DTC troubleshooting
procedure or component inspection procedure.
P0446
Change over valve (COV) (EVP system leak
detection pump) stuck close
P0455
Evaporative emission control system leak detected
(gross leak)
P0456
Evaporative emission system leak detected (very
small leak)
P2401
EVAP system leak detection pump motor circuit
low
P2402
EVAP system leak detection pump motor circuit
high
P2404
EVAP system leak detection pump sense circuit
problem
P2405
EVAP system leak detection pump sense circuit low
input
P2407
EVAP system leak detection pump sense circuit
intermittent
NOTE:
To successfully perform this procedure, all PIDs must be within the
following specifications before proceeding to the next step.
The PCM will cancel the EVAP system test if the VPWR PID value
falls lower than 11.0 V during the test.
PID
PID Range
BARO
72.2 kPa {543 mmHg, 21.3 inHg} or more
FLI
15-85%
IAT
5-45°C {41-113°F}
VPWR
11.0 V or more
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:11 PM
Page 148
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