Emission System: Diagnosis — Emission System — Removal & Installation

Emission System: Diagnosis Mazda CX-5 I

WARM-UP THREE-WAY CATALYTIC CONVERTER (WU-TWC) INSPECTION [SKYACTIV-G 2.0]

CAUTION

Perform the following procedures, DTC P0421:00 is indicated only.

Connect the M-MDS to the DLC-2.
Start the engine and warm it up to normal operating temperature.
Turn off the engine.
Verify that the engine compression is within the specification. (See «COMPRESSION INSPECTION [SKYACTIV-G 2.0]»(ref-615399-S31950252172014051000000) ). If the compression pressure is not within the specification, repair or replace the malfunctioning part.
Drive the vehicle for 10 min at 65-96 km/h {40-60 mph} to allow the WU-TWC to reach normal operating temperature.
Stop the vehicle and leave it in a safe space.
Access Test ID 10:21:80 on the "Diagnostic Monitoring Test Result" function.
Verify that the test result is within specification indicated on the M-MDS. If it is not as specified, replace the exhaust manifold. (See «EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.0]»(ref-615409-S05941657582014051000000) ).

Note. The rollover valve cannot be disassembled and inspected as it is built into the fuel tank.

Perform the fuel tank inspection. (See «FUEL TANK INSPECTION [SKYACTIV-G 2.0]»(ref-615403-S15339048242014051000000) ). If there is any malfunction, replace the fuel tank. (See «FUEL TANK REMOVAL/INSTALLATION [SKYACTIV-G 2.0]»(ref-615403-S35472952672014051000000) ).