2003 NISSAN ALMERA N16 Electronic Repair Manual

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Page 577 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0420 THREE WAY CATALYST FUNCTION
EC-247
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8. Rev engine up to 2,000 to 3,000 rpm and maintain it until
“INCMP” of “CATALYST” cha

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NISSAN ALMERA N16 2003 Electronic Repair Manual EC-248
[QG (WITH EURO-OBD)]
DTC P0420 THREE WAY CATALYST FUNCTION
5. Set voltmeters probes between ECM terminal 35 (HO2S1 sig-
nal) and engine ground, and ECM terminal 16 (HO2S2 signa

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NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0420 THREE WAY CATALYST FUNCTION
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3.CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO TO 4

Page 580 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual EC-250
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DTC P0420 THREE WAY CATALYST FUNCTION
7. CHECK INJECTOR
1. Turn ignition switch “OFF”.
2. Remove injector assembly.
Refer to EM-26, "
FUEL INJECTOR AND FUEL TUBE

Page 581 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-251
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DTC P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
PFP:14920
Descript

DTC P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-251
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DTC P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
PFP:14920
DescriptionEBS00K8N
SYSTEM DESCRIPTION
*1: This signal is sent to the ECM through CAN communication line.
*2: The ECM determines the start signal status by the signals of engine speed and battery voltage.
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass pas-
sage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP
canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is
determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor
from the EVAP canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. The EVAP canister purge volume control solenoid valve is
moved by ON/OFF pulses from the ECM. The longer the ON pulse,
the greater the amount of fuel vapor that will flow through the valve.
CONSULT-II Reference Value in Data Monitor ModeEBS00K8O
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed
*2
EVAP canister
purge flow controlEVAP canister purge
volume control solenoid
valve Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Battery
Battery voltage*2
Throttle position sensor Throttle position
Accelerator pedal position sensor Closed throttle position
Heated oxygen sensors 1Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Vehicle speed signal
*1Vehicle speed
SEF337U
MONITOR ITEM CONDITION SPECIFICATION
PURG VOL C/V
●Engine: After warming up
●Shift lever:
N (A/T models)
Neutral (M/T models)
●Air conditioner switch: OFF
●No-loadIdle 0%
2,000 rpm 15 - 30%

Page 582 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual EC-252
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DTC P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
On Board Diagnosis Logic
EBS00K8P
DTC Confirmation ProcedureEBS00K8Q
NOTE:
If “DTC Confirmation Procedure” h

Page 583 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-253
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Wiring DiagramEBS00K8R
YEC293A

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NISSAN ALMERA N16 2003 Electronic Repair Manual EC-254
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DTC P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use E

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