Subaru Crosstrek Service Manual: Dtc p2420 evap system switching valve control circuit high
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC P2420 EVAP SYSTEM SWITCHING VALVE CONTROL CIRCUIT HIGH
DTC detecting condition:
Immediately at fault recognition
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">
, and Inspection Mode Inspection Mode > PROCEDURE">.
Wiring diagram:
Engine electrical system Engine Electrical System">
| STEP | CHECK | YES | NO |
1.CHECK HARNESS BETWEEN ECM AND LEAK CHECK VALVE ASSEMBLY CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the leak check valve assembly.
3) Turn the ignition switch to ON.
4) Measure the voltage between leak check valve assembly and chassis ground.
Connector & terminal
(R400) No. 1 (+) — Chassis ground (−):
Is the voltage 10 V or more?
Repair the short circuit to power in harness between ECM connector and leak check valve assembly connector.
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P2420 EVAP SYSTEM SWITCHING VALVE CONTROL CIRCUIT HIGH">Go to Step 2.
2.CHECK LEAK CHECK VALVE ASSEMBLY.
1) Turn the ignition switch to OFF.
2) Check the switching valve of the leak check valve assembly. Leak Check Valve Assembly > INSPECTION">
Is the check result OK?
Repair the poor contact in the leak check valve assembly connector.
Replace the leak check valve assembly. Leak Check Valve Assembly">
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit in Evaporative Leak Check Module switching valve.
Judge as NG if out of specification.
2. COMPONENT DESCRIPTION
(1) | Leak check valve ASSY | (5) | Vacuum pump | (9) | Fuel tank |
(2) | Switching valve | (6) | Drain filter | (10) | Canister |
(3) | Reference orifice (0.02 inch orifice) | (7) | Purge control solenoid valve | ||
(4) | Pressure sensor | (8) | Intake manifold |
3. EXECUTION CONDITION
Secondary Parameters | Execution condition |
Battery voltage | ≥ 10.9 V |
Evaporative emission system switching valve command | ON |
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Malfunction Criteria | Threshold Value |
Measured EVAP system switching valve current | ≥ 12 A |
Time Needed for Diagnosis: 2500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
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Other materials:
Installation
BRAKE > Front Disc Brake AssemblyINSTALLATIONNOTE:Before installation, remove mud and foreign matter from the caliper body assembly and support - front disc brake.1. Check each part. Front Disc Brake Assembly > INSPECTION">2. Apply a thin coat of grease to the support - front disc bra ...
Braking tips
WARNING
Never rest your foot on the brake
pedal while driving. This can cause
dangerous overheating of the
brakes and needless wear on the
brake pads and linings.
When the brakes get wet
When driving in rain or after washing the
vehicle, the brakes may get wet. As a
result, brake stopping d ...
Type B
Temperature control dial (Refer to "Automatic
climate control operation (type B, C
and D)" F4-7 and/or "Temperature control"
Air conditioner button (Refer to "Air
conditioner control"
Fan speed control dial (Refer to "Automatic
climate control operation (type B, C
and D)" F4-7 a ...
