Page 1551 of 2896
EC-382Revision: June 2006
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
2007 Versa
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSORPFP:22365
Component DescriptionUBS00QIU
The EVAP control system pressure sensor (1) detects pressure in
the purge line. The sensor output voltage to the ECM increases as
pressure increases.
This illustration is a view from under vehicle
EVAP canister (2)
EVAP canister vent control valve (3)
CONSULT-II Reference Value in Data Monitor ModeUBS00QIV
Specification data are reference values.
On Board Diagnosis LogicUBS00QIW
NOTE:
If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-430, "
DTC P0643 SENSOR POWER SUPPLY" .
BBIA0693E
PBIB1207E
MONITOR ITEM CONDITION SPECIFICATION
EVAP SYS PRES
Ignition switch: ON Approx. 1.8 - 4.8V
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0451
0451EVAP control system
pressure sensor perfor-
manceECM detects a sloshing signal from the EVAP
control system pressure sensor
Harness or connectors
EVAP control system pressure sensor
Page 1552 of 2896
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-383
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: June 20062007 Versa
DTC Confirmation ProcedureUBS00QIX
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
3. Start engine and wait at least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.
If 1st trip DTC is detected, go to EC-383, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureUBS00QIY
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
Refer to EC-150, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
SEF 1 94 Y
:Vehicle front
1. Body ground E24 2. Engine ground F9 3. engine ground F16
4. Body ground E15
BBIA0698E
Page 1553 of 2896
EC-384Revision: June 2006
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
2007 Versa
2. CHECK EVPA CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
1. Disconnect EVAP control system pressure sensor (1) harness
connector.
–This illustration is a view from under vehicle
–EVAP canister (2)
–EVAP canister vent control valve (3)
2. Check sensor harness connector for water.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness connector.
3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-384, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace EVAP control system pressure sensor.
4. CHECK INTERMITTENT INCIDENT
Refer to EC-143, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
For wiring diagram, refer to EC-387, "
Wiring Diagram" .
>>INSPECTION END
Component InspectionUBS00QIZ
EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Always replace O-ring with a new one.
2. Install a vacuum pump to EVAP control system pressure sensor.
3. Turn ignition switch ON and check output voltage between ECM
terminal 42 and ground under the following conditions.
CAUTION:
Always calibrate the vacuum pump gauge when using it.
Do not apply below -93.3 kPa (-700 mmHg, -27.56 inHg) or
pressure over 101.3 kPa (760 mmHg, 29.92 inHg).
4. If NG, replace EVAP control system pressure sensor.Water should not exist.
BBIA0693E
Applied vacuum kPa
(mmHg, inHg)Voltage V
Not applied 1.8 - 4.8
-26.7 (-200, -7.87) 2.1 to 2.5V lower than above value
PBIB3314E
Page 1554 of 2896
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-385
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: June 20062007 Versa
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSORPFP:25085
Component DescriptionUBS00QJ0
The EVAP control system pressure sensor (1) detects pressure in
the purge line. The sensor output voltage to the ECM increases as
pressure increases.
This illustration is a view from under vehicle
EVAP canister (2)
EVAP canister vent control valve (3)
CONSULT-II Reference Value in Data Monitor ModeUBS00QJ1
Specification data are reference values.
On Board Diagnosis LogicUBS00QJ2
NOTE:
If DTC P0452 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-430, "
DTC P0643 SENSOR POWER SUPPLY" .
BBIA0693E
PBIB1207E
MONITOR ITEM CONDITION SPECIFICATION
EVAP SYS PRES
Ignition switch: ON Approx. 1.8 - 4.8V
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0452
0452EVAP control system
pressure sensor low
inputAn excessively low voltage from the sensor is
sent to ECM.
Harness or connectors
(EVAP control system pressure sensor
circuit is open or shorted.)
EVAP control system pressure sensor
Page 1555 of 2896
EC-386Revision: June 2006
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
2007 Versa
DTC Confirmation ProcedureUBS00QJ3
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Always perform test at a temperature of 5°C (41°F) or more.
WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Select “DATA MONITOR” mode with CONSULT-II.
5. Make sure that “FUEL T/TMP SE” is more than 0°C (32°F).
6. Start engine and wait at least 20 seconds.
If 1st trip DTC is detected, go to EC-388, "
Diagnostic Procedure"
.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Check that voltage between ECM terminal 43 (Fuel tank temper-
ature sensor signal) and ground is less than 4.2V.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and wait at least 20 seconds.
5. Select Service $07 with GST.
If 1st trip DTC is detected, go to EC-388, "
Diagnostic Procedure"
.
SEF 1 94 Y
SEF 11 3U
Page 1557 of 2896
EC-388Revision: June 2006
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
2007 Versa
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureUBS00QJ5
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
Refer to EC-150, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2. CHECK CONNECTOR
1. Disconnect EVAP control system pressure sensor (1) harness
connector.
–This illustration is a view from under vehicle
–EVAP canister (2)
–EVAP canister vent control valve (3)
2. Check sensor harness connector for water.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness connector.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
42 VEVAP control system pres-
sure sensor[Ignition switch: ON]Approximately 1.8 - 4.8V
51 OSensor ground
(EVAP control system pres-
sure sensor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
76 WEVAP control system pres-
sure sensor power supply[Ignition switch: ON]Approximately 5V
:Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15
BBIA0698E
Water should not exist.
BBIA0693E
Page 1558 of 2896
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-389
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: June 20062007 Versa
3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between EVAP control system pressure sensor
terminal 3 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E8, F8
Harness connectors M69, E7
Harness connectors B102, M13
Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND
SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between EVAP control system pressure sensor terminal 1 and ECM terminal
51. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E8, F8
Harness connectors M69, E7
Harness connectors B102, M13
Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors. Voltage: Approximately 5V
PBIB0138E
Continuity should exist.
Page 1559 of 2896
EC-390Revision: June 2006
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
2007 Versa
7. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Check harness continuity between ECM terminal 42 and EVAP control system pressure sensor terminal
2. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E8, F8
Harness connectors M69, E7
Harness connectors B102, M13
Harness for open or short between ECM and EVAP control system pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-390, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace EVAP control system pressure sensor.
10. CHECK INTERMITTENT INCIDENT
Refer to EC-143, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionUBS00QJ6
EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Always replace O-ring with a new one.
2. Install a vacuum pump to EVAP control system pressure sensor.
3. Turn ignition switch ON and check output voltage between ECM
terminal 42 and ground under the following conditions.
CAUTION:
Always calibrate the vacuum pump gauge when using it.
Do not apply below -93.3 kPa (-700 mmHg, -27.56 inHg) or
pressure over 101.3 kPa (760 mmHg, 29.92 inHg).
4. If NG, replace EVAP control system pressure sensor.Continuity should exist.
Applied vacuum kPa
(mmHg, inHg)Voltage V
Not applied 1.8 - 4.8
-26.7 (-200, -7.87) 2.1 to 2.5V lower than above value
PBIB3314E