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DTC P0404 [MZR-CD (RF Turbo)]

id0102f1831500

DTC P0404 | EGR control circuit range/performance
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DETECTION CONDITION | • The PCM monitors EGR valve control signal current to calculate EGR valve (DC motor) temperature. If the calculate malfunction when the EGR valve (DC motor) temperature is more than 90 °C {194 °F}, the PCM determines that the EGR valve control circuit has a malfunction. Diagnostic support note • MIL illuminates if PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for the same malfunction has been stored in PCM. • PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle. • FREEZE FRAME DATA is available. • DTC is stored in the PCM memory.
POSSIBLE CAUSE | • EGR valve malfunction • Connector or terminal malfunction • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record FREEZE FRAME DATA on repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Check for related service repair information availability? | Yes | Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA • Is DTC P0404 on FREEZE FRAME DATA? | Yes | Go to the next step.
No | Go to troubleshooting procedures for DTC in FREEZE FRAME DATA. (See DTC TABLE [MZR-CD (RF Turbo)].)
4 | INSPECT EGR VALVE AND PCM CONNECTORS FOR POOR CONNECTION • Turn the engine switch off. • Disconnect the EGR valve connector. • Inspect for poor connection (such as damaged/pulled-out pins, and corrosion). • Is there any malfunction? | Yes | Repair or replace terminal, then go to Step 6.
No | Go to the next step.
5 | INSPECT EGR VALVE • Inspect the EGR valve. (See EGR VALVE INSPECTION [MZR-CD (RF Turbo)].) • Is the EGR valve normal? | Yes | Go to the next step.
No | Replace the EGR valve, then go to the next step. (See EGR VALVE REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
6 | VERIFY TROUBLESHOOTING OF DTC P0404 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn the engine switch to ON position (engine off). • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Is the same DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to the next step.
7 | VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].) • Is any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | Troubleshooting completed.