Emission System: Other Mazda MX-5 NC

Open Circuit

1. If there is no continuity, there is an open circuit. Repair or replace the wiring harness. EVAP system leak detection pump terminal C and PCM terminal 1V EVAP system leak detection pump terminal D and PCM terminal 1U EVAP system leak detection pump terminal A and main relay EVAP system leak detection pump terminal B and body ground

Short Circuit

1. If there is continuity, there is a short circuit. Repair or replace the wiring harness. EVAP system leak detection pump terminal C and body ground EVAP system leak detection pump terminal D and body ground EVAP system leak detection pump terminal C and power supply EVAP system leak detection pump terminal D and power supply EVAP system leak detection pump terminal A and body ground EVAP system leak detection pump terminal B and power supply

Scheme 37

Scheme 38

Scheme 39

1. Remove the battery cover.
2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [LF]»(ref-244448-S25513985422006092400000) .)
3. Disconnect the evaporative hose from the air filter.
4. Cover the evaporative hose with vinyl sheets or the like to prevent them from being scratched or contaminated with foreign material.
5. Remove the air filter.
6. Install in the reverse order of removal.

Scheme 40

1. Remove the air filter. (See «AIR FILTER REMOVAL/INSTALLATION [LF]»(ref-244459-S28552087032006092400000) ).
2. Blow from port A and verify that there is airflow from port B. If not as specified, replace the air filter.
3. Blow from port B and verify that there is airflow from port A. If not as specified, replace the air filter. (See «AIR FILTER REMOVAL/INSTALLATION [LF]»(ref-244459-S28552087032006092400000) ).

Scheme 41

1. Remove the battery cover.
2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [LF]»(ref-244448-S25513985422006092400000) .)
3. Disconnect the evaporative hose.
4. Remove the evaporative chamber.
5. Cover the evaporative hose with vinyl sheets or the like to prevent them from being scratched or contaminated with foreign material.
6. Install in the reverse order of removal.

Scheme 42

1. Remove the evaporative chamber.
2. Blow from port A and verify that there is airflow from port B. If not as specified, replace the evaporative chamber.

Scheme 43

1. Remove the battery cover.
2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [LF]»(ref-244448-S25513985422006092400000).)
3. Remove in the order indicated in (Scheme 44).
4. Install in the reverse order of removal.

Scheme 44

1. Fit the evaporative hose onto the respective fittings, and install clamps (Scheme 45) Insert the evaporative hose securely to the nipple. Inspect the evaporative hose for damage and deformation.

Scheme 45

1. Remove the charcoal canister. (See «CHARCOAL CANISTER REMOVAL/INSTALLATION [LF]»(ref-244459-S34047711422006092400000) ).
2. Plug the EVAP leak detection pump side and purge solenoid valve side of the charcoal canister.
3. Inspect for air leakage when blowing air by mouth from the fuel tank side. If air leaks, replace the charcoal canister. (See «CHARCOAL CANISTER REMOVAL/INSTALLATION [LF]»(ref-244459-S34047711422006092400000) ).

Scheme 46

1. Remove the battery cover.
2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [LF]»(ref-244448-S25513985422006092400000) .)
3. Disconnect the purge solenoid valve connector.
4. Disconnect the vacuum hose from the purge solenoid valve.
5. Remove the purge solenoid valve from the air hose.
6. Install in the reverse order of removal.

1. If there is no continuity, there is an open circuit. Repair or replace the wiring harness. Purge solenoid valve terminal A and PCM terminal 2C Purge solenoid valve terminal B and main relay

1. If there is continuity, there is a short circuit. Repair or replace the wiring harness. Purge solenoid valve terminal A and power supply Purge solenoid valve terminal A and body ground Purge solenoid valve terminal B and body ground

1. If there is no continuity, there is an open circuit. Repair or replace the wiring harness. EGR valve terminal A and PCM terminal 2G EGR valve terminal B and PCM terminal 2L EGR valve terminal E and PCM terminal 2K EGR valve terminal F and PCM terminal 2H EGR valve terminal C and main relay EGR valve terminal D and main relay

1. If there is continuity, there is a short circuit. Repair or replace the wiring harness. EGR valve terminal A and body ground EGR valve terminal A and power supply EGR valve terminal B and body ground EGR valve terminal B and power supply EGR valve terminal C and body ground EGR valve terminal D and body ground EGR valve terminal E and body ground EGR valve terminal E and power supply EGR valve terminal F and body ground EGR valve terminal F and power supply

Scheme 47

Scheme 48

1. Remove the intake manifold. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [LF]»(ref-244455-S24513161252006092400000) .)
2. Remove the PCV valve.
3. Verify that there is no airflow when pressure is applied to port A. If there is airflow, replace the PCV valve.
4. Verify that there is airflow when vacuum is applied to port A. If there is no airflow, replace the PCV valve.

Quick Release Connector Type

Scheme 49