SFI SYSTEM(for Rear Air Fuel Ratio Sensor), Diagnostic DTC:P045011, P045015, P04502F

DTC Code	DTC Name
P045011	Evaporative Emission System Pressure Sensor/Switch Circuit Short to Ground
P045015	Evaporative Emission System Pressure Sensor/Switch Circuit Short to Battery or Open
P04502F	Evaporative Emission System Pressure Sensor/Switch Signal Erratic

DTC SUMMARY

Tech Tips

This DTC is applicable to w/ Canister Pump Module only.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P045011	Evaporative Emission System Pressure Sensor/Switch Circuit Short to Ground	EVAP pressure sensor less than 42.11 kPa(abs) [6.11 psi(abs)] for 0.5 seconds.	Canister pump module Wire harness or connector (canister pump module - ECM) ECM	Comes on	DTC stored	SAE Code: P0452
P045015	Evaporative Emission System Pressure Sensor/Switch Circuit Short to Battery or Open	EVAP pressure sensor higher than 123.761 kPa(abs) [17.95 psi(abs)] for 0.5 seconds.	Canister pump module Wire harness or connector (canister pump module - ECM) ECM	Comes on	DTC stored	SAE Code: P0453
P04502F	Evaporative Emission System Pressure Sensor/Switch Signal Erratic	Sensor output voltage fluctuates frequently in a certain time period.	Canister pump module Wire harness or connector (canister pump module - ECM) EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose) ECM	Comes on	DTC stored	SAE Code: P0451

DTC No.	Monitoring Item	Detection Timing	Detection Logic	SAE
P045011	Canister pressure sensor low input	Engine switch on (IG) EVAP monitoring (engine switch off)	1 trip	P0452
P045015	Canister pressure sensor high input	Engine switch on (IG) EVAP monitoring (engine switch off)	1 trip	P0453
P04502F	Canister pressure sensor abnormal voltage fluctuation	EVAP monitoring (engine switch off) Engine running	2 trip	P0451

Tech Tips

The canister pressure sensor is built into the canister pump module.

DESCRIPTION

The description can be found in EVAP (Evaporative Emission) System.

Click here

MONITOR DESCRIPTION

DTC P045011: Canister pressure sensor voltage low

If the canister pressure sensor voltage output (pressure) is less than 0.45 V: 42.11 kPa(abs) [6.11 psi(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 P045015: Canister pressure sensor voltage high

If the canister pressure sensor voltage output (pressure) is higher than 4.9 V: 123.761 kPa(abs) [17.95 psi(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 P04502F: Canister pressure sensor abnormal voltage fluctuation

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 (2 trip detection logic).

MONITOR STRATEGY

Required Sensors/Components

Canister pump module

Frequency of Operation

Continuous: P045011, P045015

Once per driving cycle: P04502F

CONFIRMATION DRIVING PATTERN

Note

The Evaporative System Check (Automatic Mode) consists of 7 steps performed automatically by the GTS. It takes a maximum of approximately 24 minutes.
Do not perform the Evaporative System Check when the fuel tank is higher 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 GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Intake Air Temperature.
Check that the intake air temperature is between 4.4 and 35°C (40 and 95°F).
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the GTS 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: P045011, P045015 or P04502F.

Check the DTC judgment result.

GTS 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

Tech Tips

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

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 tank cap.
The GTS is required to conduct the following diagnostic troubleshooting procedure.
Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

CONFIRM DTC AND EVAP PRESSURE

Connect the GTS to the DLC3.
Turn the engine switch on (IG) (do not start the engine).
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Powertrain > Engine > Trouble Codes
Read the DTCs.
Enter the following menus: Powertrain / Engine / Data List / Vapor Pressure Pump.

Powertrain > Engine > Data List

Tester Display

Vapor Pressure Pump

Tester Display
Vapor Pressure Pump

Read the EVAP (Evaporative Emission) pressure displayed on the GTS.

Result

Display (DTC Output)	Test Result	Suspected Trouble Area	Proceed to
P045011	Less than 42.11 kPa(abs) [6.11 psi(abs)]	Wire harness or connector (ECM - canister pressure sensor) Canister pressure sensor Short in ECM circuit	A
P045015	Higher than 123.761 kPa(abs) [17.95 psi(abs)]	Wire harness or connector (ECM - canister pressure sensor) Canister pressure sensor Open in ECM circuit	B
P04502F	-	Canister pressure sensor	C

CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Click here

GO TO EVAP SYSTEM Click here

CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)

Disconnect the ECM connector.

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

Result

Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
A46-38 (PPMP) - Body ground and other terminals	Always	Below 10 Ω	Wire harness or connector (ECM - canister pressure sensor) Short in canister pressure sensor circuit	A
A46-38 (PPMP) - Body ground and other terminals	Always	10 kΩ or higher	Wire harness or connector (ECM - canister pressure sensor) Short in ECM circuit	B

REPLACE ECM Click here

CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)

Disconnect the canister pump module connector.
Disconnect the ECM connector.

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

Result

Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
A46-38 (PPMP) - Body ground and other terminals	Always	10 kΩ or higher	Short in canister pressure sensor circuit	A
A46-38 (PPMP) - Body ground and other terminals	Always	Below 10 Ω	Short in wire harness or connector (ECM - canister pressure sensor)	B

GO TO STEP 6 Click here

GO TO STEP 7 Click here

REPLACE ECM

Replace the ECM.

Click here

Result

Proceed to
NEXT

GO TO STEP 8 Click here

CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)

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

Disconnect the canister pump module connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
R14-8 (SGND) - Body ground	Always	100 Ω or less

Turn the engine switch on (IG).

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
R14-6 (VCC) - Body ground	Engine switch on (IG)	4.5 to 5.5 V
R14-7 (VOUT) - Body ground	Engine switch on (IG)	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 or connector (ECM - canister pressure sensor)	B

REPAIR OR REPLACE HARNESS OR CONNECTOR (CANISTER PUMP MODULE - ECM) Click here

REPLACE CANISTER PUMP MODULE

Replace the canister pump module.

Click here

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.

*1	Fuel Tank Vent Hose	*2	Vent Hose
*3	Air Inlet Port	*4	Fuel Tank
*5	Canister Pump Module	*6	Canister
*7	Canister Filter	*8	No. 2 Charcoal Canister Filter
*9	Fuel Tank Cap Assembly	-	-
*a	Inspection Area (check for disconnection and/or cracks)	-	-

Result

Proceed to
NEXT

GO TO STEP 8 Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR (CANISTER PUMP MODULE - ECM)

Result

Proceed to
NEXT

CLEAR DTC

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTC after recording the Freeze Frame Data and DTC.

Powertrain > Engine > Clear DTCs

Turn the engine switch off and wait for at least 30 seconds.

Result

Proceed to
NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P045011 OR P045015)

Perform the Evaporative System Check using the GTS, referring to the Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display

All Readiness
Input the DTC: P045011 or P045015.

Tester Display
All Readiness

Check the DTC judgment result.

GTS 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

Result

Proceed to
NEXT

END