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DTC P2144 [MZR-CD (RF Turbo)]

BME010202100205

DTC P2144 | EGR control solenoid valve control circuit low input
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DETECTION CONDITION | • The PCM monitors the output signal to the EGR control solenoid valve. If the EGR control solenoid valve voltage is low even if the EGR control solenoid valve is off, the PCM determines that there is a malfunction in the EGR control solenoid valve control system. Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
POSSIBLE CAUSE | • EGR control solenoid valve malfunction • Open circuit in wiring harness between PCM control relay terminal C and EGR control solenoid valve terminal A • Open circuit in wiring harness between EGR control solenoid valve terminal B and PCM terminal 77
• Short to ground circuit in wiring harness between EGR control solenoid valve terminal B and PCM terminal 77
• 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 the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available? | 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 | VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT? • Connect the WDS or equivalent to the DLC-2. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Is the PENDING CODE for this DTC present? | Yes | Go to the next step.
No | Intermittent concern exists. Perform the "INTERMITTENT CONCERN TROUBLESHOOTING". (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD (RF Turbo)].)
4 | INSPECT EGR CONTROL SOLENOID VALVE CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Disconnect the EGR control solenoid valve connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 10.
No | Go to the next step.
5 | INSPECT EGR CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT FOR OPEN • Turn the engine switch to the ON position (Engine off). • Measure the voltage between EGR control solenoid valve terminal A (wiring harness-side) and body GND. • Is the voltage B+? | Yes | Go to the next step.
No | Repair or replace the wiring harness for an open circuit, then go to Step 10.
6 | INSPECT EGR CONTROL SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between EGR control solenoid valve terminal B (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness for a possible short to ground, then go to Step 10.
No | Go to the next step.
7 | INSPECT EGR CONTROL SOLENOID VALVE • Inspect the EGR control solenoid valve. (See EGR CONTROL SOLENOID VALVE INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace the EGR control solenoid valve, then go to Step 10.
No | Go to the next step.
8 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 10.
No | Go to the next step.
9 | INSPECT EGR CONTROL SOLENOID VALVE CONTROL CIRCUIT FOR OPEN • Inspect for continuity between EGR control solenoid valve terminal B (wiring harness-side) and PCM terminal 77 (wiring harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for an open circuit, then go to the next step.
10 | VERIFY TROUBLESHOOTING OF DTC P2144 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Is the PENDING CODE for this DTC present? | Yes | Replace the PCM, then go to the next step.
No | Go to the next step.
11 | VERIFY AFTER REPAIR PROCEDURE • Perform the Repair Verification Drive Mode. (See OBD DRIVE MODE [MZR-CD (RF Turbo)].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | DTC troubleshooting completed.