1999 NISSAN PRIMERA Control

Wiring DiagramNCEC0253
YEC783
: Detectable line for DTC
: Non-detectable line for DTC
ECM EVAP CANISTER
PURGE VOLUME
CONTROL SOLENOID
VA LV EFUSE
BLOCK
(J/B)Refer to EL-POWER. IGNITION SWITCH
ON or START
Refer to last page (Foldout page)
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL
SOLENOID VALVE (CIRCUIT)QG16I18DE
Wiring Diagram
EC-264

Diagnostic ProcedureNCEC0254
1 CHECK POWER SUPPLY
1. Turn ignition switch ªOFFº.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
SEF076X3. Turn ignition switch ªONº.
4. Check voltage between terminals 2 and engine ground with CONSULT-II or tester.
SEF077XVoltage: Battery voltage
OK or NG
OK©GO TO 3.
NG©GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors M50, F104
I10A fuse
IHarness for open or short between EVAP canister purge volume control valve and fuse
©Repair harness or connectors.
3 CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between
ECM terminal 14 and terminal 1.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 4.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL
SOLENOID VALVE (CIRCUIT)QG16I18DE
Diagnostic Procedure
EC-265

4 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to ªComponent Inspectionº EC-QG-266.
OK or NG
OK©GO TO 5.
NG©Replace EVAP canister purge volume control solenoid valve.
5 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-QG-102.
©INSPECTION END
Component InspectionNCEC0255EVAP CANISTER PURGE VOLUME CONTROL
SOLENOID VALVE
NCEC0255S01With CONSULT-II
1) Start engine.
2) Perform ªPURG VOL CONT/Vº in ªACTIVE TESTº mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.
If OK, inspection end. If NG, go to following step.
3) Check air passage continuity.
Condition
PURG VOL CONT/V valueAir passage continuity
between A and B
100.0% Yes
0.0% No
If NG, replace the EVAP canister purge volume control sole-
noid valve.
Without CONSULT-II
Check air passage continuity.
ConditionAir passage continuity
between A and B
12V direct current supply between ter-
minalsYe s
No supply No
If NG or operation takes more than 1 second, replace solenoid
valve.
NEF111A
SEF079X
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL
SOLENOID VALVE (CIRCUIT)QG16I18DE
Diagnostic Procedure (Cont'd)
EC-266

Component DescriptionNCEC0272MODELS WITH VEHICLE SPEED SENSOR
The vehicle speed sensor is installed in the transaxle. It contains a
pulse generator which provides a vehicle speed signal to the
speedometer. The speedometer then sends a signal to the ECM.
MODELS WITHOUT VEHICLE SPEED SENSOR
The ABS actuator and electric unit (control unit) provides a vehicle
speed signal to the speedometer. The speedometer then sends a
signal to the ECM.
ECM Terminals and Reference ValueNCEC0273Specification 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.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
86 OR/WVehicle speed sensor or
ABS actuator and elec-
tric unit (control unit)[Engine is running]
ILift up the vehicle
IIn 2nd gear position
IVehicle speed is 40 km/h (25 MPH)2.0 - 3.0 V
SEF976W
On Board Diagnosis LogicNCEC0274
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0500
0500IThe almost 0 km/h (0 MPH) signal from vehicle speed
sensor or ABS actuator and electric unit (control unit) is
sent to ECM even when vehicle is being driven.Models with vehicle speed sensor
IHarness or connector
(The vehicle speed sensor circuit is open or
shorted.)
IVehicle speed sensor
Models without vehicle speed sensor
IHarness or connector (The ABS actuator and
electric unit (control unit) is open or shorted.)
IABS actuator and electric unit (control unit)
DTC Confirmation ProcedureNCEC0275CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 9 seconds
before conducting the next test.
TESTING CONDITION:
This procedure may be conducted with the drive wheels lifted
in the shop or by driving the vehicle. If a road test is expected
to be easier, it is unnecessary to lift the vehicle.
SEF080X
DTC P0500 VEHICLE SPEED SENSOR (VSS)QG16I18DE
Component Description
EC-267

MODELS WITHOUT VSS AFTER VIN - P11U0548750
1 CHECK INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector and combination meter harness connector.
3. Check harness continuity between ECM terminal 86 and meter terminal 4.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 3.
NG©GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors F104, M50
IHarness for open or short between ECM and combination meter
©Repair open circuit or short to ground or short to power in harness or connectors.
Check Audio circuit and other linked circuit for short to ground or short to power. Refer to
EL section.
3 CHECK SPEEDOMETER FUNCTION
Make sure that speedometer functions properly.
OK or NG
OK©GO TO 5.
NG©GO TO 4.
4 DETECT MALFUNCTIONING PART
Check the following.
IHarness for open or short between combination meter and ABS actuator and electric unit (control unit)
©Repair harness or connectors. Check ABS actuator and electric unit (control unit) and its
circuit. Refer to EL section.
5 CHECK INTERMITTENT INCIDENT
Check combination meter internal circuit for short to ground or short to power. Refer to EL section.
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-QG-102.
©INSPECTION END
DTC P0500 VEHICLE SPEED SENSOR (VSS)QG16I18DE
Diagnostic Procedure (Cont'd)
EC-273

DescriptionNCEC0279SYSTEM DESCRIPTIONNCEC0279S01
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS) Engine speed
Idle air con-
trolIACV-AAC valve Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Throttle position sensor Throttle position
PNP switch Park/Neutral position
Air conditioner switch Air conditioner operation
Power steering oil pressure switch Power steering load signal
Battery Battery voltage
Vehicle speed sensor or ABS actuator and
electric unit (control unit)Vehicle speed
Cooling fan Cooling fan operation
Electrical load Electrical load signal
This system automatically controls engine idle speed to a specified
level. Idle speed is controlled through fine adjustment of the
amount of air which by-passes the throttle valve via IACV-AAC
valve. The IACV-AAC valve changes the opening of the air by-pass
passage to control the amount of auxiliary air. This valve is actu-
ated by a step motor built into the valve, which moves the valve in
the axial direction in steps corresponding to the ECM output sig-
nals. One step of IACV-AAC valve movement causes the respec-
tive opening of the air by-pass passage. (i.e. when the step
advances, the opening is enlarged.) The opening of the valve is
varied to allow for optimum control of the engine idling speed. The
crankshaft position sensor (POS) detects the actual engine speed
and sends a signal to the ECM. The ECM then controls the step
position of the IACV-AAC valve so that engine speed coincides with
the target value memorized in ECM. The target engine speed is the
lowest speed at which the engine can operate steadily. The opti-
mum value stored in the ECM is determined by taking into consid-
eration various engine conditions, such as during warm up,
deceleration, and engine load (air conditioner, power steering, cool-
ing fan operation and electrical load).
COMPONENT DESCRIPTIONNCEC0279S02The IACV-AAC valve is operated by a step motor for centralized
control of auxiliary air supply. This motor has four winding phases
and is actuated by the output signals of ECM which turns ON and
OFF two windings each in sequence. Each time the IACV-AAC
valve opens or closes to change the auxiliary air quantity, the ECM
sends a pulse signal to the step motor. When no change in the
auxiliary air quantity is needed, the ECM does not issue the pulse
signal. A certain voltage signal is issued so that the valve remains
at that particular opening.
SEF937W
DTC P0505 IDLE AIR CONTROL VALVE (IACV) Ð
AUXILIARY AIR CONTROL (AAC) VALVEQG16I18DE
Description
EC-274

CONSULT-II Reference Value in Data Monitor
Mode
NCEC0280
MONITOR ITEM CONDITION SPECIFICATION
IACV-AAC/VIEngine: After warming up
IAir conditioner switch: OFF
IShift lever: ªNº
INo-loadIdle 5 - 20 steps
2,000 rpm Ð
ECM Terminals and Reference ValueNCEC0281Specification 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.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
6
7
15
16BR
Y/B
P
ORIACV-AAC valve[Engine is running]
IWarm-up condition
IIdle speed0.1 - 14V
On Board Diagnosis LogicNCEC0282
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0505
0505IAn improper voltage signal is sent to ECM through the
valve.IHarness or connectors
(The IACV-AAC valve circuit is open.)
IIACV-AAC valve
DTC Confirmation ProcedureNCEC0283NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 9 seconds
before conducting the next test.
If the target idle speed is out of the specified value, perform
ªIdle Air Volume Learningº, EC-QG-33, before conducting
ªDTC Confirmation Procedureº. For the target idle speed, refer
to ªService Data and Specifications (SDS)º, EC-QG-355.
With CONSULT-II
1) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Start engine and warm it up to normal operating temperature.
4) Rev engine from idle to more than 2,000 rpm 20 times.
If 1st trip DTC is detected, go to ªDiagnostic Procedureº, EC-
QG-277.
With GST
Follow the procedure ªWith CONSULT-IIº above.
NEF085A
DTC P0505 IDLE AIR CONTROL VALVE (IACV) Ð
AUXILIARY AIR CONTROL (AAC) VALVEQG16I18DE
CONSULT-II Reference Value in Data Monitor Mode
EC-275

Wiring DiagramNCEC0284
YEC785
: Detectable line for DTC
: Non-detectable line for DTC
ECM ECM RELAYRefer to EL-POWER. BATTERY
IACV-AAC
VA LV E
DTC P0505 IDLE AIR CONTROL VALVE (IACV) Ð
AUXILIARY AIR CONTROL (AAC) VALVEQG16I18DE
Wiring Diagram
EC-276