Toyota Tundra Service Manual: Evaporative Emission System Pressure Sensor - Manifold Absolute Pressure Correlation (P106A,P106B)

Toyota Tundra Service Manual / Engine, Hybrid System / 1ur-fe Engine Control / Sfi System / Evaporative Emission System Pressure Sensor - Manifold Absolute Pressure Correlation (P106A,P106B)

DESCRIPTION

DTC No.

DTC Detection Condition

Trouble Area

P106A

The pressure detected by the canister pressure sensor (Vapor Pressure Pump*) and the pressure detected by the manifold absolute pressure sensor (MAP*) differ by 7 kPa (54 mmHg) or more

(2 trip detection logic)

  • Canister pressure sensor (canister pump module)
  • Manifold absolute pressure sensor

P106B

The pressure detected by the canister pressure sensor (Vapor Pressure Pump*) and the pressure detected by the pressure sensor of either air switching valve (for Bank 1 or Bank 2) (Air Pump Pressure (Absolute)* or Air Pump2 Pressure (Absolute)*) differ by 6.98 kPa (52 mmHg) or more

(2 trip detection logic)

  • Canister pressure sensor (canister pump module)
  • Air switching valve (Bank 1)
  • Air switching valve (Bank 2)

HINT:

*: Name of Data List item

MONITOR DESCRIPTION

This DTC is stored when a deviation from pressure sensor characteristics is detected.

The pressure sensors* are checked 55 minutes after the ignition switch is turned off. If the pressures detected by the pressure sensors* differ by a certain amount, the MIL is illuminated and a DTC is stored (2 trip detection logic).

HINT:

  • *: P106A checks the canister pressure sensor and manifold absolute pressure sensor. P106B checks the canister pressure sensor and the pressure sensor of the air switching valves (Bank 1 and Bank 2).
  • Correct judgment may not be possible when the altitude is 4000 m (13120 ft.) or more.

MONITOR STRATEGY

Related DTCs

P106A: Evaporative emission system pressure sensor - manifold absolute pressure correlation

P106B: Evaporative emission system pressure sensor - secondary air injection system pressure sensor correlation

Required Sensors/Components (Main)

  • Canister pressure sensor
  • Manifold absolute pressure sensor
  • Pressure sensor (Air switching valve (Bank 1 or Bank 2))

Required Sensors/Components (Related)

-

Frequency of Operation

Once per drive cycle

Duration

Less than 65 seconds

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

P106A:

Monitor runs whenever following DTCs not present

P0107, P0108 (Manifold absolute pressure)

P0401 (EGR system)

P0452, P0453 (EVAP system, Evaporative emission system pressure sensor)

Time elapsed after engine stop

50 minutes

Time after ECM started by soak-timer

60 seconds or more

Battery voltage

10.5 V or more

Intake air temperature

-10°C (14°F) or more

Engine coolant temperature

-10°C (14°F) or more

P106B:

Monitor runs whenever following DTCs not present

P0452, P0453 (EVAP system)

P2431, P2432, P2433, P2436, P2437, P2438 (Secondary air injection system pressure sensor)

P2440, P2441, P2442, P2443, P2444, P2445, P2446, P2447 (Secondary air injection system)

Time elapsed after engine stop

50 minutes

Time after ECM started by soak-timer

60 seconds or more

Battery voltage

10.5 V or more

Intake air temperature

-10°C (14°F) or more

Engine coolant temperature

-10°C (14°F) or more

TYPICAL MALFUNCTION THRESHOLDS

P106A:

Difference between EVAP pressure and manifold absolute pressure

More than 7.22 kPa (54 mmHg)

P106B:

Difference between EVAP pressure (Vapor Pressure Pump*) and secondary air pressure sensor (bank 1) (Air Pump Pressure (Absolute)*)

More than 6.98 kPa (52 mmHg)

Difference between EVAP pressure (Vapor Pressure Pump*) and secondary air pressure sensor (bank 2) (Air Pump2 Pressure (Absolute)*)

More than 6.98 kPa (52 mmHg)

HINT:

*: Name of Data List item

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) (See page ) [A].
  4. Start the engine.
  5. Idle the engine for 10 seconds [B].
  6. Turn the ignition switch off.
  7. Soak the vehicle for 55 minutes [C].
  8. Turn the ignition switch ON and turn the Techstream on.
  9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
  10. Read the pending DTCs [D].
  11. If a pending DTC is output, the system is malfunctioning.

    HINT:

    If no pending DTC is output, perform the steps below.

  12. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  13. Input the DTC: P106A or P106B.
  14. 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

    N/A

    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

    HINT:

    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform steps [A] through [D] again.
  15. If no pending DTC is output, perform a universal trip and check for permanent DTCs (See page ).

    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:

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 be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE

1.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P106A, P106B)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(e) Read the DTCs.

Result

Result

Proceed to

P106A is output

A

P106B is output

B

P106A and P106B are output

C

P106A, P106B and other DTCs are output

D

HINT:

If any DTCs other than P106A or P106B are output, perform troubleshooting for those DTCs first.

B

GO TO STEP 3

C

GO TO STEP 6

D

GO TO DTC CHART

A

2.

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

(a) Replace the manifold absolute pressure sensor (See page ).

NEXT

GO TO STEP 7

3.

READ VALUE USING TECHSTREAM (AIR PUMP PRESSURE (ABSOLUTE) AND AIR PUMP2 PRESSURE (ABSOLUTE))

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List / Air Pump Pressure (Absolute), Air Pump2 Pressure (Absolute) and Vapor Pressure Pump.

(e) Read the value.

Result

Result

Proceed to

Difference between Air Pump Pressure (Absolute) and Vapor Pressure Pump is more than 3.5 kPa (26 mmHg)

A

Difference between Air Pump2 Pressure (Absolute) and Vapor Pressure Pump is more than 3.5 kPa (26 mmHg)

B

B

GO TO STEP 5

A

4.

REPLACE AIR SWITCHING VALVE (FOR BANK 1)

(a) Replace the air switching valve for bank 1 (See page ).

NEXT

GO TO STEP 7

5.

REPLACE AIR SWITCHING VALVE (FOR BANK 2)

(a) Replace the air switching valve for bank 2 (See page ).

NEXT

GO TO STEP 7

6.

REPLACE CANISTER PUMP MODULE

(a) Replace the canister pump module (See page ).

NOTICE:

  • When replacing the canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in the canister interior, replace the canister and canister pump module together.
  • Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace the canister and canister pump module together.
  • Check for filter blockage in the canister filter. If the canister filter has blockages, replace the fuel tank inlet pipe sub-assembly.
Text in Illustration

*1

Fuel Tank

*2

Fuel Tank Vent Hose

*3

Canister Assembly

*4

Canister Pump Module

- Canister Pressure Sensor

- Leak Detection Pump

- Vent Valve

*5

Fuel Tank Inlet Pipe Sub-assembly (Canister Filter)

*6

Canister Outlet Hose

*a

Inspection Area (check for disconnection and/or cracks)

-

-

NEXT

7.

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream on.

(c) Clear the DTCs (See page ).

(d) Enter the following menus: Powertrain / Engine and ECT / Data List.

(e) Compare the Data List items Air Pump Pressure (Absolute) and Vapor Pressure Pump, Air Pump2 Pressure (Absolute) and Vapor Pressure Pump, and Vapor Pressure Pump and MAP.

(f) Confirm that the difference between Vapor Pressure Pump and MAP, and between Vapor Pressure Pump, Air Pump Pressure (Absolute) and Air Pump2 Pressure (Absolute) is 3.5 kPa (26 mmHg) or less.

NEXT

END

    Mass Air Flow Circuit Low (P0102,P0103)

    Manifold Absolute Pressure / Barometric Pressure Circuit Low Input (P0107,P0108)

    See More:

    Toyota Tundra Service Manual > Emission Control System: System Diagram
    SYSTEM DIAGRAM 1. SECONDARY AIR INJECTION CONTROL SYSTEM DIAGRAM 2. SECONDARY AIR INJECTION SYSTEM WIRING DIAGRAM 3. EGR CONTROL SYSTEM DIAGRAM 4. EGR CONTROL SYSTEM WIRING DIAGRAM 5. EVAP CONTROL SYSTEM DIAGRAM Text in Illustration *1 Fuel Tank Cap *2 Fuel Tank *3 Fuel Cutoff Valve *4 Vent Line *5 ...

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