Mazda MX-5 Miata Sport 2007 Manual page 2081

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
P0446
P0455
P0456
P2401
P2402
P2404
P2405
P2407
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.
NOTE:
PID SPECIFICATION
PID
BARO
FLI
IAT
VPWR
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.
2007 Mazda MX-5 Miata Sport
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.
Change over valve (COV) (EVP system leak
detection pump) stuck close
Evaporative emission control system leak detected
(gross leak)
Evaporative emission system leak detected (very
small leak)
EVAP system leak detection pump motor circuit
low
EVAP system leak detection pump motor circuit
high
EVAP system leak detection pump sense circuit
problem
EVAP system leak detection pump sense circuit low
input
EVAP system leak detection pump sense circuit
intermittent
PID Range
72.2 kPa {543 mmHg, 21.3 inHg} or more
15-85%
5-45°C {41-113°F}
11.0 V or more