DTC P0451-P0453; Evaporative Emission Control System Pressure Sensor Range / Performance [12/2012 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON (do not start the engine).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

   Powertrain > Engine and ECT > Trouble Codes 

5. Read the DTCs.
6. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Evaporative / Vapor Pressure Pump.

   Powertrain > Engine and ECT > Data List 

   Tester Display
   Vapor Pressure Pump

7. Read the EVAP (Evaporative Emission) pressure displayed on the Techstream.

   Result

   Display (DTC Output)	Test Result	Suspected Trouble Area	Proceed to
   P0451	-	Canister pressure sensor [When the vehicle has Evaporative System Check]	C
   		Canister pressure sensor [When the vehicle does not have Evaporative System Check]	D
   P0452	Less than 42.11 kPa(abs) [315.867 mmHg(abs)]	Wire harness/connector (ECM - canister pressure sensor) Canister pressure sensor Short in ECM circuit	A
   P0453	Higher than 123.761 kPa(abs) [928.331 mmHg(abs)]	Wire harness/connector (ECM - canister pressure sensor) Canister pressure sensor Open in ECM circuit	B

Result: 

B 

See step  8

Result: 

C 

GO TO EVAP SYSTEM:  EVAP System [12/2012 - 10/2015]  ,  EVAP System [10/2015 - ] 

Result: 

D 

See step  9

Result: 

A 

See step  2

1. Disconnect the ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Result

   Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
   A62-49 (PPMP) - Body ground	Always	Below 10 Ω	Wire harness/connector (ECM - canister pressure sensor) Short in canister pressure sensor circuit	A
   		10 kΩ or higher	Wire harness/connector (ECM - canister pressure sensor) Short in ECM circuit	B

Result: 

B 

See step  7

Result: 

A 

See step  3

1. Disconnect the canister pump module connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Result

   Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
   A62-49 (PPMP) - Body ground	Always	10 kΩ or higher	Short in canister pressure sensor circuit	A
   		Below 10 Ω	Short in wire harness/connector (ECM - canister pressure sensor)	B

Result: 

B 

See step  6

Result: 

A 

See step  4

1. Replace the charcoal canister leak detection pump sub-assembly.

   Refer to REMOVAL [12/2012 - ]

   NOTE:

   • 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 canister filter.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Fuel Tank Vent Hose	*2	Vent Hose
   *3	Air Inlet Port	*4	Fuel Tank
   *5	Canister Pump Module	*6	Canister Assembly
   *7	Fuel Tank Inlet Pipe Sub-assembly (Canister Filter)	*8	Fuel Tank Cap Assembly
   *a	Inspection Area (check for disconnection and/or cracks)	-	-

Result: 

NEXT 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2012 - ]

   Powertrain > Engine and ECT > Clear DTCs 

5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON.
7. Turn the Techstream on.
8. Perform the Evaporative System Check using the Techstream, referring to the Confirmation Driving Pattern.
9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

   Powertrain > Engine and ECT > Utility 

   Tester Display
   All Readiness

10. Input the DTC: P0452 or P0453.
11. Check the DTC judgment result.

    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 memory limit

Result: 

NEXT 

END 

HINT: 

If the exhaust pipe has been removed, go to the next step before reinstalling it.

Result: 

NEXT 

See step  5

1. Replace the ECM.

   Refer to REMOVAL [12/2012 - ]

Result: 

NEXT 

See step  5

1. Disconnect the canister pump module connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Canister Pump Module)

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   V3-8 (SGND) - Body ground	Always	100 Ω or less

3. Turn the ignition switch to ON.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   V3-6 (VCC) - Body ground	Ignition switch ON	4.5 to 5.5 V
   V3-7 (VOUT) - Body ground	Ignition switch ON	4.5 to 5.5 V

   Result

   Test Result	Suspected Trouble Area	Proceed to
   Voltage and resistance within standard ranges	Open in canister pressure sensor circuit	A
   Voltage and/or resistance outside standard ranges	Open in wire harness/connector (ECM - canister pressure sensor)	B

Result: 

A 

See step  4

Result: 

B 

See step  6

1. Disconnect the canister pump module connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   V3-3 (MTRB) - A62-19 (MPMP)	Always	Below 1 Ω
   V3-4 (MGND) - Body ground	Always	Below 1 Ω
   V3-6 (VCC) - A62-34 (VCPP)	Always	Below 1 Ω
   V3-7 (VOUT) - A62-49 (PPMP)	Always	Below 1 Ω
   V3-8 (SGND) - A62-48 (EPPM)	Always	Below 1 Ω
   V3-3 (MTRB) or A62-19 (MPMP) - Body ground	Always	10 kΩ or higher
   V3-6 (VCC) or A62-34 (VCPP) - Body ground	Always	10 kΩ or higher
   V3-7 (VOUT) or A62-49 (PPMP) - Body ground	Always	10 kΩ or higher
   V3-8 (SGND) or A62-48 (EPPM) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  10

1. Replace the charcoal canister leak detection pump sub-assembly.

   Refer to REMOVAL [12/2012 - ]

   NOTE:

   • 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 canister filter.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Fuel Tank Vent Hose	*2	Vent Hose
   *3	Air Inlet Port	*4	Fuel Tank
   *5	Canister Pump Module	*6	Canister Assembly
   *7	Fuel Tank Inlet Pipe Sub-assembly (Canister Filter)	*8	Fuel Tank Cap Assembly
   *a	Inspection Area (check for disconnection and/or cracks)	-	-

Result: 

NEXT 

See step  11

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2012 - ]

   Powertrain > Engine and ECT > Clear DTCs 

5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON.
7. Turn the Techstream on.
8. Start the engine and warm it up.
9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
11. Read the DTCs.

    Powertrain > Engine and ECT > Trouble Codes 

    Result

    Result	Proceed to
    No DTC is output	A
    P0451 is output	B

Result: 

A 

END 

Result: 

B 

REPLACE ECM:  REMOVAL [12/2012 - ]