- Canister pump module
-
Connector/wire harness
(Canister pump module - ECM)
- EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
- ECM
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VIA3 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 08/2016] |
| Title: 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0451-P0453; Evaporative Emission Control System Pressure Sensor Range / Performance; 2016 MY Sienna [12/2015 - 08/2016] | ||
|
DTC |
P0451 |
Evaporative Emission Control System Pressure Sensor Range / Performance |
|
DTC |
P0452 |
Evaporative Emission Control System Pressure Sensor / Switch Low Input |
|
DTC |
P0453 |
Evaporative Emission Control System Pressure Sensor / Switch High Input |
DTC SUMMARY
|
DTC No. |
Monitoring Item |
Malfunction Detection Condition |
Trouble Area |
Detection Timing |
Detection Logic |
|---|---|---|---|---|---|
|
P0451 |
Canister pressure sensor abnormal voltage fluctuation |
Sensor output voltage fluctuates frequently in a certain time period. |
|
|
2 trip |
|
Canister pressure sensor constant voltage |
Sensor output voltage does not vary in a certain time period. |
|
2 trip |
||
|
P0452 |
Canister pressure sensor low input |
EVAP pressure sensor less than 42.11009 kPa(abs) [315.85178 mmHg(abs)] for 0.5 seconds. |
|
1 trip |
|
|
P0453 |
Canister pressure sensor high input |
EVAP pressure sensor more than 123.76147 kPa(abs) [928.28775 mmHg(abs)] for 0.5 seconds. |
|
1 trip |
HINT:
The canister pressure sensor is built into the canister pump module.
DESCRIPTION
The description can be found in EVAP (Evaporative Emission) System (See page
![2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: EVAP System+](/t3Portal/stylegraphics/info.gif)
).
MONITOR DESCRIPTION
-
DTC P0451: Canister pressure sensor abnormal voltage fluctuation or being constant
If the canister pressure sensor voltage output fluctuates rapidly for 10 seconds, the ECM stops the EVAP system monitor. The ECM interprets this as the canister pressure sensor voltage fluctuating, and stops the EVAP system monitor. The ECM then illuminates the MIL and stores the DTC.
Alternatively, if the sensor voltage output does not change for 10 seconds, the ECM interprets this as the sensor being stuck, and stops the monitor. The ECM then illuminates the MIL and stores the DTC.
(Both the malfunctions are detected by 2 trip detection logic.)
-
DTC P0452: Canister pressure sensor voltage low
If the canister pressure sensor voltage output (pressure) is below 0.45 V: 42.11009 kPa(abs) [315.8518 mmHg(abs)], the ECM interprets this as an open or short circuit in the canister pressure sensor or its circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and stores the DTC (1 trip detection logic).
-
DTC P0453: Canister pressure sensor voltage high
If the canister pressure sensor voltage output (pressure) is 4.9 V: 123.76147 kPa(abs) [928.2878 mmHg(abs)] or more, the ECM interprets this as an open or short circuit in the canister pressure sensor or its circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and stores the DTC (1 trip detection logic).
MONITOR STRATEGY
|
Required Sensors/Components |
Canister pump module |
|
Frequency of Operation |
Continuous |
|
Duration |
0.5 seconds: P0452 and P0453 Less than 2 minutes: P0451 (stuck monitoring) Less than 15 seconds: P0451 (noise monitoring) |
|
MIL Operation |
Immediate: P0452 and P0453 2 driving cycles: P0451 |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
P0451 (Noise Monitor)
|
Monitor runs whenever following DTCs not stored |
None |
|
Atmospheric pressure (absolute pressure) |
70 kPa(abs) [525 mmHg(abs)] or more, and less than 110 kPa(abs) [825 mmHg(abs)] |
|
Battery voltage |
10.5 V or higher |
|
Intake air temperature |
4.4°C (40°F) or more, and less than 35°C (95°F) |
|
Canister pressure sensor malfunction (P0452, P0453) |
Not detected |
|
Either of following conditions met |
A or B |
|
A. Engine condition |
Running |
|
B. Time after key-off |
5, 7 or 9.5 hours |
P0451 (Stuck Monitor)
|
Monitor runs whenever following DTCs not stored |
None |
|
Battery voltage |
10.5 V or higher |
|
Intake air temperature |
4.4°C (40°F) or more, and less than 35°C (95°F) |
|
Canister pressure sensor malfunction (P0452, P0453) |
Not detected |
|
Atmospheric pressure (absolute pressure) |
Less than 70 kPa(abs) [525 mmHg(abs)], or 110 kPa(abs) [825 mmHg(abs)] or more |
|
Time after key-off |
5, 7 or 9.5 hours |
P0452 and P0453
|
Monitor runs whenever following DTCs not stored |
None |
|
Ignition switch |
ON |
|
Battery voltage |
8 V or higher |
|
Starter |
OFF |
TYPICAL MALFUNCTION THRESHOLDS
P0451: Canister Pressure Sensor Noise Monitor
|
Frequency that EVAP pressure change 0.3 kPa(gauge) [2.25 mmHg(gauge)] or higher |
10 times or more in 10 seconds |
P0451: Canister Pressure Sensor Stuck Monitor
|
EVAP pressure change during reference pressure measurement |
Less than 0.65 kPa(gauge) [4.876 mmHg(gauge)] |
P0452: Canister Pressure Sensor Low Voltage
|
EVAP pressure |
Below 42.11009 kPa(abs) [315.8518 mmHg(abs)] |
P0453: Canister Pressure Sensor High Voltage
|
EVAP pressure |
Higher than 123.76147 kPa(abs) [928.2878 mmHg(abs)] |
CONFIRMATION DRIVING PATTERN
NOTICE:
- The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 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 run the engine during this operation.
- When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature below 35°C (95°F).
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Data List / Intake Air.
- Check that the intake air temperature is between 4.4 and 35°C (40 and 95°F).
-
Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure) (See page
).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON and turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.
- After the Evaporative System Check is completed, check for All Readiness by entering the following menus: Powertrain / Engine / Utility / All readiness.
- Input the DTC: P0451, P0452 or P0453.
-
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 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 is INCOMPLETE or N/A and 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.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When a vehicle is brought into the workshop, leave it as it is. Do not change the vehicle condition. For example, do not tighten the fuel cap.
- Do not disassemble the canister pump module.
- The Techstream is required to conduct the following diagnostic troubleshooting procedure.
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CONFIRM DTC AND EVAP PRESSURE |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON (do not start the engine).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read DTCs.
(f) Enter the following menus: Powertrain / Engine / Data List / Vapor Pressure Pump.
(g) 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 |
C |
|
P0452 |
Below 42.11009 kPa(abs) [315.8518 mmHg(abs)] |
|
A |
|
P0453 |
Higher than 123.76147 kPa(abs) [928.2878 mmHg(abs)] |
|
B |
| B |
|
| C |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) |
(a) Turn the ignition switch off.
(b) Disconnect the B1 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Result
|
Tester Connection |
Condition |
Specified Condition |
Suspected Trouble Area |
Proceed to |
|---|---|---|---|---|
|
B1-121 (PPMP) - Body ground |
Always |
Below 10 Ω |
|
A |
|
10 kΩ or higher |
|
B |
| B |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) |
(a) Disconnect g1 the canister pump module connector.
(b) Disconnect the B1 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Result
|
Tester Connection |
Condition |
Specified Condition |
Suspected Trouble Area |
Proceed to |
|---|---|---|---|---|
|
B1-121 (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 |
| A |
|
| B |
|
|
4. |
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) |
|
(a) Disconnect the canister pump module connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
g1-8 (SGND) - Body ground |
Always |
100 Ω or less |
(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
g1-6 (VCC) - Body ground |
Ignition switch ON |
4.5 to 5.5 V |
|
g1-7 (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 |
Text in Illustration
|
*a |
Front view of wire harness connector (to Canister Pump Module) |
| B |
|
|
|
5. |
REPLACE CANISTER PUMP MODULE |
(a) Replace the canister pump module (See page
).
NOTICE:
- When replacing 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 canister interior, replace canister and canister pump module together (replace canister assembly).
- Check for filter blockage in the canister assembly. If the charcoal filter inside the canister assembly is clogged, replace canister and canister pump module together (replace canister assembly).
- Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.
Text in Illustration
|
*1 |
Fuel Tank Vent Hose |
*2 |
Vent Hose |
|
*3 |
Air Inlet Port (behind Fuel Tank Filler Pipe Cover) |
*4 |
Canister Filter |
|
*5 |
Fuel Tank |
*6 |
Canister Assembly |
|
*7 |
Canister Pump Module |
- |
- |
|
*a |
Inspection Area (Check for disconnection and/or cracks) |
- |
- |
| NEXT |
|
|
6. |
REPAIR OR REPLACE HARNESS OR CONNECTOR (CANISTER PUMP MODULE - ECM) |
HINT:
If the exhaust tailpipe has been removed, go to the next step before reinstalling it.
| NEXT |
|
|
7. |
REPLACE ECM |
(a) Replace the ECM (See page
).
|
|
8. |
CHECK WHETHER DTC OUTPUT RECURS (AFTER REPAIR) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs (See page
).
(e) Turn the ignition switch off and wait for at least 30 seconds.
(f) Turn the ignition switch to ON.
(g) Turn the Techstream on.
(h) Perform the Evaporative System Check using the Techstream, referring to the Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine / Utility / All Readiness.
(j) Input the DTC: P0451, P0452 or P0453.
(k) Check the DTC judgment result.
Result
|
Techstream Display |
Description |
|---|---|
|
NORMAL |
|
|
ABNORMAL |
|
|
INCOMPLETE |
|
|
N/A |
|
| NEXT |
|
END |
|
|