- DTC judgment completed
- System normal
Lexus NX: Evaporative Emission System Pressure Sensor - Manifold Absolute Pressure Correlation (P106A)
Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (engine Control) / Sfi System / Evaporative Emission System Pressure Sensor - Manifold Absolute Pressure Correlation (P106A)
DESCRIPTION
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P106A | Evaporative Emission System Pressure Sensor - Manifold Absolute Pressure Correlation | The difference between the pressure of the canister pressure sensor (Vapor Pressure Pump*) and manifold absolute pressure sensor (MAP*) is higher than 8.7 kPa(gauge) [65 mmHg(gauge)] (2 trip detection logic). |
| Comes on | DTC stored |
HINT:
*: Data List name
MONITOR DESCRIPTION
This DTC is designed to detect a deviation in the output characteristics of a pressure sensor.
The pressure of the canister pressure sensor and manifold absolute pressure sensor is monitored 50 minutes after the power switch is turned off. If there is a difference in the pressures, the MIL is illuminated (2 trip detection logic).
HINT:
Correct judgment may not be possible when the altitude is 4000 m (13124 ft.) or higher.
MONITOR STRATEGY
| Related DTCs | P106A: Absolute pressure sensor rationality |
| Required Sensors/Components (Main) | Canister pressure sensor Manifold absolute pressure sensor |
| Required Sensors/Components (Related) | - |
| Frequency of Operation | Once per driving cycle |
| Duration | Within 65 seconds |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever the following DTCs are not stored | P0106, P0107, P0108 (Manifold absolute pressure) P0401 (EGR system (closed)) P0452, P0453 (Evaporative emission system pressure sensor) |
| Time elapsed after engine stop | 50 minutes |
| Time after ECM started by soak-timer | 60 seconds or more |
| Auxiliary battery voltage | 8 V or higher |
| Intake air temperature | -10°C (14°F) or higher |
| Engine coolant temperature sensor | -10°C (14°F) or higher |
TYPICAL MALFUNCTION THRESHOLDS
| Difference between EVAP pressure and manifold absolute pressure | Higher than 8.7 kPa(gauge) [65 mmHg(gauge)] |
CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and 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) and turn the Techstream on.
-
Put the engine in inspection mode (maintenance mode).
Click here
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- Start the engine and Idle for 10 seconds [A].
- Turn the power switch off.
- Leave the power switch off for 55 minutes [B].
- Turn the power switch on (IG) and turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
-
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: P106A.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform steps [A] through [C] again.
-
If no pending DTC is output, perform a universal trip and check for permanent DTCs.
Click here
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
CAUTION / NOTICE / HINT
HINT:
-
Refer to "Data List / Active Test" [Vapor Pressure Pump and MAP].
Click here
- Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
| 1. | CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P106A) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine and ECT > Trouble Codes| Result | Proceed to |
|---|---|
| DTC P106A is output | A |
| DTC P106A and other DTCs are output | B |
HINT:
If any DTCs other than P106A are output, troubleshoot those DTCs first.
| B | .gif) | GO TO DTC CHART |
|
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| 2. | READ VALUE USING TECHSTREAM (VAPOR PRESSURE PUMP AND MAP) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Vapor Pressure Pump and MAP.
Powertrain > Engine and ECT > Data List| Tester Display |
|---|
| MAP |
| Vapor Pressure Pump |
(e) Compare the Vapor Pressure Pump and MAP data from the Data List with day's atmospheric pressure*. Read the Data List twice, when the engine is both cold and warmed up.
HINT:
- *: Standard atmospheric pressure is 101 kPa(abs) [760 mmHg(abs)]. For every 100 m (328 ft.) increase in altitude, pressure drops by 1 kPa (7.5 mmHg). The pressure also varies due to the weather (high atmospheric pressure, low atmospheric pressure).
- Also, check "Atmosphere Pressure" in the Data List.
- If you do not know the atmospheric pressure refer to the Vapor Pressure Pump value of other vehicles in the workshop and check the difference in pressure.
| Result | Proceed to |
|---|---|
| If the Vapor Pressure Pump value differs from the atmospheric pressure by 3.5 kPa [26.254 mmHg] or higher | A |
| If the MAP value differs from the atmospheric pressure by 3.5 kPa [26.254 mmHg] or higher | B |
| B | | GO TO STEP 4 |
|
| 3. | REPLACE CANISTER PUMP MODULE |
(a) Replace the canister pump module.
Click here
| NEXT | | GO TO STEP 5 |
| 4. | REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR |
(a) Replace the manifold absolute pressure sensor.
Click here
|
| 5. | CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and the Techstream on.
(c) Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Vapor Pressure Pump and MAP.
Powertrain > Engine and ECT > Data List| Tester Display |
|---|
| MAP |
| Vapor Pressure Pump |
(d) Confirm that the difference between Vapor Pressure Pump and MAP are 3.5 kPa [26.25 mmHg] or less.
| NEXT | | END |
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