Lexus ES: Evaporative Emission Fuel Tank (Small Leak) (P142200,P142300)
DTC SUMMARY
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P142200 | Evaporative Emission Fuel Tank (Small Leak) | Leak detection pump creates negative pressure (vacuum) in fuel tank and fuel tank pressure is measured. Reference pressure is measured at the start and at end of leak check. If stabilized pressure is higher than third reference pressure, ECM determines that fuel tank has a small leak. |
| Comes on | DTC stored | SAE Code: P1422 |
| P142300 | Evaporative Emission Fuel Tank (Gross Leak) | Leak detection pump creates negative pressure (vacuum) in fuel tank and fuel tank pressure is measured. Reference pressure is measured at the start and at end of leak check. If stabilized pressure is higher than [third reference pressure x 0.2], ECM determines that fuel tank has a large leak. |
| Comes on | DTC stored | SAE Code: P1423 |
| DTC No. | Monitoring Item | Detection Timing | Detection Logic | SAE Code |
|---|---|---|---|---|
| P142200 | Fuel tank small leak | EVAP monitoring (power switch off) | 2 trip | P1422 |
| P142300 | Fuel tank gross leak | P1423 |
DESCRIPTION
Refer to EVAP (evaporative emission) System.
Click here .gif)
MONITOR DESCRIPTION
-
P142200: Fuel tank small leak
In operation G, the leak detection pump creates negative pressure (vacuum) in the fuel tank and the fuel tank pressure is measured. If the stabilized system pressure is higher than the third reference pressure, the ECM determines that the fuel tank has a small leak. The ECM illuminates the MIL and stores the DTC (2 trip detection logic).
-
P142300: Fuel tank gross leak
In operation G, the leak detection pump creates negative pressure (vacuum) in the fuel tank and the fuel tank pressure is measured. If the stabilized system pressure is higher than [third reference pressure x 0.2] (near atmospheric pressure), the ECM determines that the fuel tank has a large leak. The ECM illuminates the MIL and stores the DTC (2 trip detection logic).
MONITOR STRATEGY
| Required Sensors/Components (Main) | Fuel tank pressure sensor Fuel vapor-containment valve |
| Required Sensors/Components (Related) | - |
| Frequency of Operation | Once per driving cycle |
| Duration | Within 20 minutes |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
| Key-off monitor runs when all of the following conditions are met | - |
| Atmospheric pressure | 70 kPa(abs) [10.2 psi(abs)] or higher, and less than 110 kPa(abs) [16 psi(abs)] |
| Auxiliary battery voltage | 10.5 V or higher |
| Vehicle speed | Less than 4 km/h (2.5 mph) |
| Power switch | Off |
| Engine condition | Not running |
| Key-OFF duration | 5, 7 or 9.5 hours |
| Pressure sensor of canister pump module malfunction (P0451, P0452, P0453) | Not detected |
| Fuel tank pressure sensor malfunction (P1451, P1452, P1453) | Not detected |
| Purge VSV | Not operated by scan tool |
| Vent valve | Not operated by scan tool |
| Fuel vapor-containment valve | Not operated by scan tool |
| Leak detection pump | Not operated by scan tool |
| Purge flow before key-OFF | Performed |
| Engine coolant temperature | 4.4°C (39.9°F) or higher, and less than 35°C (95°F) |
| Intake air temperature | 4.4°C (39.9°F) or higher, and less than 35°C (95°F) |
TYPICAL MALFUNCTION THRESHOLDS
P1422: Fuel Tank Small Leak| Fuel tank pressure when vacuum introduction for fuel tank was complete | Between conditions 1 and 2 |
| Condition 1 | Higher than third reference pressure |
| Condition 2 | Lower than [third reference pressure x 0.2] |
| Fuel tank pressure when vacuum introduction for fuel tank was complete | Higher than [third reference pressure x 0.2] |
MONITOR RESULT
Refer to EVAP system.
Click here
CONFIRMATION DRIVING PATTERN
NOTICE:
- The Evaporative System Check (Automatic Mode) consists of 9 steps performed automatically by the Techstream. It takes a maximum of approximately 40 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 start the engine during this operation.
- When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor will from and any check result will be inaccurate. When performing the Evaporative System Check, keep the fuel temperature less than 35°C (95°F).
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for at least 30 seconds.
- Turn the power switch on (IG) [A].
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode [B].
- After the "Evaporative System Check" is completed, check for All Readiness by entering the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P142200 or P142300.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
- DTC judgment completed
- System normal
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
HINT:
- If the judgment result is NORMAL, the system is normal.
- If the judgment result is ABNORMAL, the system is malfunctioning.
-
[A] to [B]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
CAUTION / NOTICE / HINT
NOTICE:
-
Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
Click here
(Select Powertrain in Health Check and then check the time stamp data.)
Click here
-
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
Click here
PROCEDURE
| 1. | GO TO EVAP SYSTEM |
(a) Refer to EVAP System.
Click here
| NEXT | .gif) | END |
READ NEXT:
Fuel Tank Pressure Sensor Circuit Short to Ground (P145011,P145015,P14502A,P14502F)
DTC SUMMARY DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P145011 Fuel Tank Pressure Sensor Circuit Short to Ground The output voltage of the fuel
Actuator Cut Circuit Stuck Off (P16B09F)
MONITOR DESCRIPTION The ECM monitors the operation of the throttle actuator. When a malfunction is detected in the throttle actuator cut circuit immediately after the power switch is turned off, the E
Throttle Actuator "A" Control Motor Circuit Current Below Threshold (P210018,P210019)
DESCRIPTION The throttle actuator is operated by the ECM and opens and closes the throttle valve using gears. The opening angle of the throttle valve is detected by the throttle position sensor, which
SEE MORE:
ABS Solenoid Control Module Actuator Stuck On (C143A7E,C143A7F,C143D49,C14DA14)
DESCRIPTION The ABS solenoid relay is built into the skid control ECU in the brake actuator assembly. The ABS solenoid relay supplies power to each solenoid. The skid control ECU (brake actuator assembly) detects an ABS solenoid relay malfunction by performing a self check and relay operation check.
Removal
REMOVAL PROCEDURE 1. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY Click here 2. REMOVE ACCELERATOR PEDAL(W/SENSOR) ROD ASSEMBLY NOTICE:
Avoid physical shock to the accelerator pedal sensor assembly.
Do not disassemble the accelerator pedal sensor assembly.
The accelerator pedal s
