P2401

FA20 ENGINE CONTROL: SFI SYSTEM: P2401, P2402, P2419, P2420; Evaporative Emission System Leak Detection Pump Control Circuit Low; 2013 MY FR-S [03/2012 -]
P2401 - Evaporative Emission System Leak Detection Pump Control Circuit Low
P2402 - Evaporative Emission Leak Detection Pump Stuck ON
P2419 - Evaporative Emission System Switching Valve Control Circuit Low
P2420 - Evaporative Emission Pressure Switching Valve Stuck OFF

DTC SUMMARY





DESCRIPTION

The description can be found in EVAP (Evaporative Emission) System EVAP System.

MONITOR DESCRIPTION

While the ECM monitors the EVAP system, it also monitors the status of the leak detection pump and the vent valve within the canister pump module. If the ECM detects an abnormality in the leak detection pump or vent valve operational statuses, the ECM stores the DTC, and illuminates the MIL.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS

P2401





P2402





P2419





P2402





MONITOR RESULT

Refer to Checking Monitor Status Mode 6 Data.

CONFIRMATION DRIVING PATTERN

NOTICE:
* The Evaporative System Check (Automatic Mode) consists of 5 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes.
* Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.
* Do not run the engine during this operation.
* When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature below 35°C (95°F) and the coolant temperature below 45°C (113°F).

1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON and turn the Techstream on.

3. Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure) Reading and Clearing Diagnostic Trouble Codes.

4. Turn the ignition switch off and wait for at least 30 seconds.

5. Turn the ignition switch to ON and turn the Techstream on.

6. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

7. After the "Evaporative System Check" is completed, check for All Readiness by entering the following menus: Powertrain / Engine / Utility / All readiness.

8. Input the DTC: P2401, P2402, P2419 or P2420.

9. Check the DTC judgment result.





HINT
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows ABNORMAL, the system has a malfunction.

10. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

Refer to DTC P0451 P0451.

INSPECTION PROCEDURE

NOTICE:
* Do not disassemble the canister pump module.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. INSPECT CANISTER PUMP MODULE (POWER SOURCE)

(a) Turn the ignition switch off.









(b) Disconnect the canister pump module connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Voltage:





NG -- INSPECT RELAY (EFI MAIN1)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

(c) Disconnect the ECM connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open):





Standard Resistance (Check for short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT CANISTER PUMP MODULE

(a) Inspect the canister pump module Testing and Inspection.

NG -- REPLACE CANISTER PUMP MODULE Removal

OK -- CHECK INTERMITTENT PROBLEMS Check For Intermittent Problems

4. INSPECT RELAY (EFI MAIN1)

(a) Inspect the EFI MAIN1 relay Testing and Inspection.

NG -- REPLACE RELAY (EFI MAIN1)
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - EFI MAIN1 RELAY)

(a) Turn the ignition switch off.

(b) Remove EFI MAIN1 relay from the engine room relay block assembly.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open):





Standard Resistance (Check for short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- GO TO ECM POWER SOURCE CIRCUIT ECM Power Source Circuit