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Last Modified: 9-16-2014 6.6 C Doc ID: RM000002BHC08MX Model Year: 2015 Model: Tundra Prod Date Range: [08/2014 - ] Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2420; Evaporative Emission System Switching Valve Control Circuit High; 2015 MY Tundra [08/2014 - ] DTC P2420 Evaporative Emission System Switching Valve Control Circuit High DTC SUMMARY DTC CODE MONITORING ITEM MALFUNCTION DETECTION CONDITION TROUBLE AREA DETECTION TIMING DETECTION LOGIC P2420 Vent valve stuck open (vent) Following condition met during key-off EVAP monitor: EVAP pressure change when vent valve closed (ON) less than 0.3 kPa-g (2.25 mmHg-g) Canister pump module (Reference orifice, leak detection pump, vent valve) Connector/wire harness (Canister pump module - ECM) ECM While ignition switch off 2 trip HINT: The vent valve is built into the canister pump module. DESCRIPTION The description can be found in the EVAP (Evaporative Emission) System
. INSPECTION PROCEDURE Refer to the EVAP System
. MONITOR DESCRIPTION 5 hours* after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the EVAP system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure. HINT: *: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the ignition SEQUENCE OPERATION DESCRIPTION DURATION - ECM activation Activated by soak timer 5, 7 or 9.5 hours after ignition switch turned off. - A Atmospheric pressure measurement Vent valve turned OFF (vent) and EVAP system pressure measured by ECM in order to register atmospheric pressure. If pressure in EVAP system not between 70 kPa-a and 110 kPa-a (525 mmHg-a and 825 mmHg-a), 60 seconds 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2420; Evapor... |