1999 NISSAN PRIMERA Control

ENGINE CONTROL MODULE COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
ItemDIAGNOSTIC TEST MODE
SELF-DIAG-
NOSTIC
RESULTSD ATA
MONITORACTIVE
TEST
ENGINE CONTROL MODULE COMPONENT PARTS
INPUTCamshaft position sensor (PUMP) *1 X *2 X
Mass air flow sensor X X
Engine coolant temperature sensor X X
Control sleeve position sensor X X X
Fuel temperature sensor X X
Vehicle speed sensor or ABS actuator and electric unit
(control unit)XX
Accelerator position sensor X X
Accelerator position switch X
Brake lamp switch X *2 X
Crankshaft position sensor (TDC) X X
Needle lift sensor X X
Ignition switch (start signal) X
Ignition switch (ON signal) X
Air conditioner switch X
Brake switch X
Battery voltage X
OUTPUTInjection timing control valve X X X
Fuel cut solenoid valve X X X
Air conditioner relay X
Glow relay X X
EGRC-solenoid valve X X
Cooling fan relay X X
X: Applicable
*1: Imaginary sensor, which produces secondary engine revolution signal using needle lift sensor pulse.
*2: CONSULT-II may not display, but self-diagnostic results are available with MI.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONCD20T
CONSULT-II (Cont'd)
EC-28

SELF-DIAGNOSTIC MODE
Regarding items detected in ªSELF-DIAG RESULTSº mode, refer to ªDiagnostic Trouble chartº.
DATA MONITOR MODE
Monitored item
[Unit]ECM
input
signalsMain
signalsDescription Remarks
CKPS×RPM
(TDC) [rpm]
qq
lThe engine speed computed from the
crankshaft position sensor (TDC) sig-
nal is displayed.
CMPS×RPM -
PUMP [rpm]
qq
lThe engine speed computed from the
camshaft position sensor (PUMP) sig-
nal is displayed.
COOLAN TEMP/S
[ÉC] or [ÉF]
qq
lThe engine coolant temperature (deter-
mined by the signal voltage of the
engine coolant temperature sensor) is
displayed.lWhen the engine coolant temperature
sensor is open or short-circuited, ECM
enters fail-safe mode. The engine cool-
ant temperature determined by the
ECM is displayed.
VHCL SPEED SE
[km/h] or [mph]
qq
lThe vehicle speed computed from the
vehicle speed sensor signal or ABS
actuator and electric unit (control unit)
signal is displayed.
FUEL TEMP SEN
[ÉC] or [ÉF]
qq
lThe fuel temperature (determined by
the signal voltage of the fuel tempera-
ture sensor) is displayed.
ACCEL POS SEN
[V]
qqlThe accelerator position sensor signal
voltage is displayed.
OFF ACCEL POS
[ON/OFF]
qqlIndicates [ON/OFF] condition from the
accelerator position switch signal.
C/SLEEV POS/S [V]
qqlThe control sleeve position sensor sig-
nal voltage is displayed.
BATTERY VOLT [V]
qqlThe power supply voltage of ECM is
displayed.
START SIGNAL
[ON/OFF]
qqlIndicates [ON/OFF] condition from the
starter signal.lAfter starting the engine, [OFF] is dis-
played regardless of the starter signal.
AIR COND SIG
[ON/OFF]
qq
lIndicates [ON/OFF] condition of the air
conditioner switch as determined by
the air conditioner signal.
BRAKE SW
[ON/OFF]
qlIndicates [ON/OFF] condition of the
stio lamp switch.
BRAKE SW2
[ON/OFF]
qlIndicates [ON/OFF] condition of the
stio lamp switch 2.
IGN SW
[ON/OFF]
qqlIndicates [ON/OFF] condition from igni-
tion switch.
MAS AIR/FL SE [V]
qqlThe signal voltage of the mass air flow
sensor is displayed.lWhen the engine is stopped, a certain
value is indicated.
ACT INJ TIMG [É]
q
lThe actual injection timing angle deter-
mined by the ECM (an approximate
average angle between injection start
and end from TDC) is displayed.
TARGET F/INJ
[mm
3/STROKE]q
lThe target fuel injection quantity
(determined by the ECM according to
the input signal) is indicated.
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONCD20T
CONSULT-II (Cont'd)
EC-29

Monitored item
[Unit]ECM
input
signalsMain
signalsDescription Remarks
FUEL CUT S/V
[ON/OFF]
lThe control condition of the fuel cut
solenoid valve (determined by ECM
according to the input signal) is indi-
cated.
lOFF ... Fuel cut solenoid valve is not
operating.
ON ... Fuel cut solenoid valve is oper-
ating.
lWhen the fuel cut solenoid valve is not
operating, fuel supply is shut off.
AIR COND RLY
[ON/OFF]
q
lThe air conditioner relay control condi-
tion (determined by ECM according to
the input signal) is indicated.
GLOW RLY
[ON/OFF]
q
lThe glow relay control condition (deter-
mined by ECM according to the input
signal) is displayed.
COOLING FAN
[LOW/HI/OFF]
q
lIndicates the control condition of the
cooling fans (determined by ECM
according to the input signal).
lLOW ... Operates at low speed.
HI ... Operates at high speed.
OFF ... Stopped.
EGRC SOL/V A
[ON/OFF]
lThe control condition of the EGRC-
solenoid valve (determined by ECM
according to the input signal) is indi-
cated.
lOFF ... EGRC-solenoid valve is not
operating.
ON ... EGRC-solenoid valve is oper-
ating.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONCD20T
CONSULT-II (Cont'd)
EC-30

ACTIVE TEST MODE
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
TARGET F/INJ
lEngine: Return to the original
trouble condition
lFix the target injection quantity
using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.lControl sleeve position sensor
COOLING FAN
lIgnition switch: ONlOperate the cooling fan at ªLOWº,
ªHIº speed and turn ªOFFº using
CONSULT-II.Cooling fan moves at ªLOWº, ªHIº
speed and stops.lHarness and connectorlCooling fan motor
FUEL CUT SOL/V
lIgnition switch: ONlTurn solenoid valve ªONº and
ªOFFº with the CONSULT-II and
listen to operating sound.Solenoid valve makes an operating
sound.lHarness and connectorlSolenoid valve
EGRC SOL/V A
lIgnition switch: ONlTurn solenoid valve ªONº and
ªOFFº with the CONSULT-II and
listen to operating sound.Solenoid valve makes an operating
sound.lHarness and connectorlSolenoid valve
GLOW RLY
lIgnition switch: ON (Engine
stopped)
lTurn the glow relay ªONº and
ªOFFº using CONSULT-II and listen
to operating sound.Glow relay makes the operating
sound.lHarness and connectorlFuel pump relay
INJ TIMING
lEngine: Return to the original
trouble condition
lRetard the injection timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.lAdjust initial injection timing
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONCD20T
CONSULT-II (Cont'd)
EC-31

Introduction
The engine has an ECM to control major systems such as fuel
injection control, fuel injection timing control, glow control
system, etc. The ECM accepts input signals from sensors and
instantly drive the electronic fuel injection pump use the data to
based on current ambient conditions. It is essential that both
input and output signals are correct and stable. At the same time,
it is important that there are no problems such as vacuum leaks,
or other problems with the engine.
It is much more difficult to diagnose a problem that occurs inter-
mittently rather than catastrophically. Most intermittent problems
are caused by poor electric connections or faulty wiring. In this
case, careful checking of suspected circuits may help prevent the
replacement of good parts.
A visual check only may not be sufficient to determine the cause
of the problems. A road test with CONSULT-II or a circuit tester
connected should be performed. Follow the ªWork Flowº on the
next page.
Before undertaking actual checks, take a few minutes to talk with
a customer who approaches with a driveability complaint. The
customer can supply good information about such problems,
especially intermittent ones. Find out what symptoms are present
and under what conditions they occur. A ªDiagnostic Worksheetº
like the example on next page should be used.
Start your diagnosis by looking for ªconventionalº problems first.
This will help troubleshoot driveability problems on a vehicle with
an electronically controlled engine.
SEF858S
SEF233G
SEF234G
TROUBLE DIAGNOSIS Ð IntroductionCD20T
EC-33

Diagnostic Trouble Chart
ENGINE RELATED ITEMS
Detected items
(Screen terms for CONSULT-II,
ªSELF-DIAG RESULTSº mode)Malfunction is detected when ...
Mass air flow sensor circuit
(MASS AIR FLOW SEN)
lAn excessively high or low voltage from the sensor is detected by the ECM.
Engine coolant temperature
sensor circuit
(COOLANT TEMP SEN)
lAn excessively high or low voltage from the sensor is detected by the ECM.
Vehicle speed sensor circuit or
ABS actuator and electric unit
(control unit) circuit
(VEHICLE SPEED SEN)
lThe almost 0 km/h (0 mph) signal from the sensor is detected by the ECM even when
vehicle is being driven.
Control sleeve position sensor
circuit
(CONT SLEEV POS SEN)
lAn excessively high or low voltage from the sensor is detected by the ECM.
lAn incorrect voltage signal from the sensor is detected by the ECM during engine run-
ning.
Fuel injection feedback 2
(F/INJ F/B 2)
lThe fuel injection feedback system (consists of the ECM, electric governor and control
sleeve position sensor) does not operate properly.
Fuel injection timing feedback
(F/INJ TIMG F/B)
lThe fuel injection timing feedback system (consists of the ECM, fuel injection timing con-
trol valve and needle lift sensor) does not operate properly.
Abbreviations for Quick Reference of ªDIAGNOSTIC TROUBLE CONFIRMATION PROCEDUREº
IGN: ON : Turning the ignition switch ON is required for checking the function of the sensor, switch, solenoid and circuit.
RUNNING : Running engine is required for checking the function of the sensor, switch, solenoid and circuit.
LIFTING : Lifting up the vehicle, running engine and spinning wheels are required.
DRIVING : Driving the vehicle in the specified pattern is required.
Abbreviations for Quick Reference of ªOVERALL FUNCTION CHECKº
IGN: ON : Turning the ignition switch ON is required for the ECM to detect a malfunction (if one exists).
RUNNING : Running engine is required for the ECM to detect a malfunction (if one exists).
LIFTING : Lifting up the vehicle, running engine and spinning wheels are required for the ECM to detect a malfunction (if one
exists).
DRIVING : Driving the vehicle in the specified pattern is required for the ECM to detect a malfunction (if one exists).
TROUBLE DIAGNOSIS Ð General DescriptionCD20T
EC-39

Ð: Not applicable
Check Items
(Possible Cause)*1
Confirmation
Procedure
Quick Ref.*2
Overall
Function
CheckMI
IlluminationReference
Page
lHarness or connectors
(The sensor circuit is open or shorted.)
lMass air flow sensorIGN: ON Ð Ð EC-CD-62
lHarness or connectors
(The sensor circuit is open or shorted.)
lEngine coolant temperature sensorIGN: ON Ð Lighting up EC-CD-66
lHarness or connectors
(The sensor circuit is open or shorted.)
lVehicle speed sensor or ABS actuator and electric unit
(control unit)Ð LIFTING Ð EC-CD-70
lHarness or connectors
(The sensor circuit is open or shorted.)
lControl sleeve position sensorRUNNING Ð Lighting up EC-CD-74
lMain power supply circuit (ECM terminals23,45),
68and fuse
lHarness or connectors
(Electric governor and control sleeve position sensor cir-
cuit)
lElectronic fuel injection pump
lECM
lElectric governorRUNNING
(DRIVING)Ð Lighting up EC-CD-78
lHarness or connectors
(Injection timing control valve, Needle lift sensor and
Crankshaft position sensor (TDC) circuit]
lInjection timing control valve
lNeedle lift sensor
lCrankshaft position sensor
lAir in fuel lineRUNNING
(DRIVING)Ð Lighting up EC-CD-82
*1:lThis is Quick Reference of ªDIAGNOSTIC TROUBLE CONFIRMATION PROCEDUREº.
Details are described in each TROUBLE DIAGNOSIS.
*2:
lThe ªOVERALL FUNCTION CHECKº is a simplified and effective way to inspect a component or circuit.
In some cases, the ªOVERALL FUNCTION CHECKº is used rather than a ªDIAGNOSTIC TROUBLE CONFIRMATION PRO-
CEDUREº.
When no DIAGNOSTIC TROUBLE CONFIRMATION PROCEDURE is available, the ªNGº result of the OVERALL FUNCTION
CHECK can be considered to mean the same as a malfunction item detection.
lDuring an ªNGº OVERALL FUNCTION CHECK, the malfunction item might not be confirmed.lThis is Quick Reference of ªOVERALL FUNCTION CHECKº.
Details are described in each TROUBLE DIAGNOSIS.
TROUBLE DIAGNOSIS Ð General DescriptionCD20T
Diagnostic Trouble Chart (Cont'd)
EC-40

ENGINE RELATED ITEMS
Detected items
(Screen terms for
CONSULT-II, ªSELF-DIAG
RESULTSº mode)Malfunction is detected when ...
Atmospheric pressure
sensor *5
(Ð) *3
lAn excessively high or low voltage from the sensor is detected by the ECM.
Glow relay circuit
(GLOW RELAY)
lGlow relay circuit is open or shorted.
ECM
(Ð)*3
lECM reference voltage (2.5V) is excessively high or low.
Air conditioner relay circuit
(Ð)*3
lAir conditioner relay circuit is shorted.
EGRC-solenoid valve A
(EGR SYS)
lEGRC-solenoid valve A is open or shorted.
Brake switch circuits
(Ð)*3
lBrake switch circuits are open or shorted.
ECM
(Ð)*3
lECM version number or switching function is not plausible.
ECCS-D relay circuit
(Ð)*3
lECCS-D relay shut-off time is too late.
Ignition switch ªONº signal
circuit
(Ð)*3
lIgnition switch ªONº signal evaluation circuit in ECM is malfunctioning.
Injection timing control
valve circuit
(INJ TIMING CONT/V)
lInjection timing control valve circuit is open or shorted.
Camshaft position sensor
(PUMP)*4
(Ð)*3
lAn improper signal is calculated by the ECM.
Abbreviations for Quick Reference of ªDIAGNOSTIC TROUBLE CONFIRMATION PROCEDUREº
IGN: ON : Turning the ignition switch ON is required for checking the function of the sensor, switch, solenoid and circuit.
RUNNING : Running engine is required for checking the function of the sensor, switch, solenoid and circuit.
LIFTING : Lifting up the vehicle, running engine and spinning wheels are required.
DRIVING : Driving the vehicle in the specified pattern is required.
Abbreviations for Quick Reference of ªOVERALL FUNCTION CHECKº
IGN: ON : Turning the ignition switch ON is required for the ECM to detect a malfunction (if one exists).
RUNNING : Running engine is required for the ECM to detect a malfunction (if one exists).
LIFTING : Lifting up the vehicle, running engine and spinning wheels are required for the ECM to detect a malfunction (if one
exists).
DRIVING : Driving the vehicle in the specified pattern is required for the ECM to detect a malfunction (if one exists).
TROUBLE DIAGNOSIS Ð General DescriptionCD20T
Diagnostic Trouble Chart (Cont'd)
EC-43