cooling NISSAN PATROL 1998 Y61 / 5.G Engine Control Workshop Manual

TROUBLEDIAGNOSISFOR``F/INJTIMGF/B''
(DTC21).......................................................................101
InjectionTimingControlValve.................................101
TROUBLEDIAGNOSISFOR``ACCELPOSSW
(F/C)''(DTC23) ...........................................................106
AcceleratorSwitch(F/C)..........................................106
TROUBLEDIAGNOSISFOR``ECM1''(DTC27),
``ECM2''(DTC31) .......................................................111
EngineControlModule(ECM)-ECCS-DControl
Module.....................................................................111
TROUBLEDIAGNOSISFOR``OVERHEAT''
(DTC28) .......................................................................113
CoolingFan(Overheat)...........................................113
TROUBLEDIAGNOSISFOR``I/CINT/ATEMP
SEN''(DTC33) ............................................................122
ChargeAirTemperatureSensor..............................122
TROUBLEDIAGNOSISFOR``NEEDLELIFT
SEN''(DTC34) ............................................................126
NeedleLiftSensor(NLS)........................................126
TROUBLE DIAGNOSIS FOR ``FUEL CUT S/V 1''
(DTC 36), ``FCV SHORT'' (DTC 37), ``FUEL CUT
S/V2''(DTC38) ...........................................................130
FuelCutSolenoidValve..........................................130
TROUBLE DIAGNOSIS FOR ``FUEL TEMP
SENSOR''(DTC42) ....................................................135
FuelTemperatureSensor(FTS)..............................135 TROUBLE DIAGNOSIS FOR ``ACCEL POS
SENSOR''(DTC43)
....................................................139
AcceleratorPositionSensor....................................139
TROUBLE DIAGNOSIS FOR ``CRANK POS SEN
(TDC)''(DTC47) ..........................................................144
CrankshaftPositionSensor(TDC)..........................144
TROUBLEDIAGNOSISFOR``GOVCUT
CIRCUIT''(DTC48) .....................................................149
GovernorCutCircuit................................................149
TROUBLEDIAGNOSESFORNON-DETECTABLE
ITEMS ........................................................................\
...151
GlowControlSystem...............................................151
EGRC-SolenoidValveA,BandThrottleControl
SolenoidValve.........................................................156
StartSignal..............................................................163
AcceleratorPositionSwitch.....................................165
Park/NeutralPositionSwitch...................................170
A/TControl...............................................................175
ChargeAirCoolerFanControl................................178
HeatUpSwitch........................................................183
AirConditionerControl............................................187
MIL&DataLinkConnectors...................................188
SERVICEDATAANDSPECIFICATIONS(SDS) ........189
GeneralSpeci®cations.............................................189
InjectionNozzle.......................................................189
InspectionandAdjustment......................................189
When you read wiring diagrams:
+ Read GI section, ``HOW TO READ WIRING DIAGRAMS''.
+ See EL section, ``POWER SUPPLY ROUTING'' for power distribution circuit.
When you perform trouble diagnoses, read GI section, ``HOW TO FOLLOW FLOW CHART IN
TROUBLE DIAGNOSES'' and ``HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL
INCIDENT''.

System Chart
Camshaft position sensor (PUMP)c
ECM
(ECCS-D
control
module)
Crankshaft position sensor (TDC)c
Control sleeve position sensorc
Fuel temperature sensorc
Engine coolant temperature sensorc
Needle lift sensorc
Accelerator position sensorc
Accelerator position switchc
Accelerator switch (F/C)c
Neutral position switchc
Ignition switchc
Battery voltagec
Vehicle speed sensorc
Air conditioner switchc
Mass air ¯ow sensorc
Charge air temperature sensorc
Heat up switchc
Fuel injection controlcElectric governor
Fuel injection timing controlcInjection timing control valve
Fuel cut controlcFuel cut solenoid valve
Glow control systemcGlow relay & glow lamp
On board diagnostic systemcMalfunction indicator lamp
(On the instrument panel)
EGR valve & throttle control
valve controlcEGRC-solenoid valve A, B &
throttle control solenoid valve
Cooling fan controlcCooling fan relay
Air conditioning cut controlcAir conditioner relay
Charge air cooler fan controlcCharge air cooler fan relay
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
EC-14

ECCS COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
ItemDIAGNOSTIC TEST MODE
SELF-DIAG-
NOSTIC
RESULTSDATA
MONITORACTIVE
TEST
ECCS COMPONENT PARTS
INPUTCamshaft position sensor (PUMP) X X
Engine coolant temperature sensor X X
Control sleeve position sensor X X
Fuel temperature sensor X X
Vehicle speed sensor X X
Accelerator position sensor X X X
Accelerator position switch X X
Accelerator switch (F/C) X X
Crankshaft position sensor (TDC) X X
Needle lift sensor X
Ignition switch (start signal) X
Neutral position switch X
Battery voltage X
Air conditioner switch X
Heat up switch X
Mass air ¯ow sensor X X
Charge air temperature sensor X
OUTPUTInjection timing control valve X X X
Fuel cut solenoid valve X X X
Glow relayXX
EGRC-solenoid valve A, B & throttle control solenoid valve X X
Cooling fan relay X X
Charge air cooler fan relay X
X: Applicable
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT (Cont'd)
EC-37

Monitored item
[Unit]ECM
input
signalsMain
signalsDescription Remarks
AIR COND SIG
[ON/OFF]
jj
+Indicates [ON/OFF] condition of the air
conditioner switch as determined by the
air conditioner signal.
IGN SW
[ON/OFF]
jj+Indicates [ON/OFF] condition from igni-
tion switch signal.
MAS AIR/FL SE [V]
jj+The signal voltage of the mass air ¯ow
sensor is displayed.+When the engine is stopped, a certain
value is indicated.
ACT INJ TIMG [É]
jj
+The actual injection timing angle deter-
mined by the ECM (an approximate
average angle between injection start
and end from TDC) is displayed.
INJ TIMG C/V [%]+Indicates the duty ratio of fuel injection
timing control valve.
DECELER F/CUT
[ON/OFF]
j
+Indicates [ON/OFF] condition from decel-
eration fuel cut signal.+When the accelerator pedal is released
quickly with engine speed at 3,000 rpm
or more, ``ON'' is displayed.
FUEL CUT S/V
[ON/OFF]
j
+The control condition of the fuel cut sole-
noid valve (determined by ECM accord-
ing to the input signal) is indicted.
+OFF ... Fuel cut solenoid valve is not
operating.
ON ... Fuel cut solenoid valve is operat-
ing.+When the fuel cut solenoid valve is not
operating, fuel is not supplied to injection
nozzles.
GLOW RLY [ON/OFF]
j
+The glow relay control condition (deter-
mined by ECM according to the input
signal) is displayed.
COOLING FAN
[LOW/HI/OFF]
j
+Indicates the control condition of the
cooling fans (determined by ECM
according to the input signal).
+LOW ... Operates at low speed.
HI ... Operates at high speed.
OFF ... Stopped.
I/C FAN RLY
[ON/OFF]
j
+Indicates the control condition of the
charge air cooler fan (determined by
ECM according to the input signals).
EGRC SOL/V A
[ON/OFF]+The control condition of the EGRC-sole-
noid valve A (determined by ECM
according to the input signal) is indi-
cated.
+OFF ... EGRC-solenoid valve A is not
operating.
ON ... EGRC-solenoid valve A is operat-
ing.
EGRC SOL/V B
[ON/OFF]+The control condition of the EGRC-sole-
noid valve B (determined by ECM
according to the input signal) is indi-
cated.
+OFF ... EGRC-solenoid valve B is not
operating.
ON ... EGRC-solenoid valve B is operat-
ing.
THROT RLY
[ON/OFF]+The control condition of the throttle con-
trol solenoid valve (determined by ECM
according to the input signal) is indi-
cated.
+OFF ... Throttle control solenoid valve is
not operating.
ON ... Throttle control solenoid valve is
operating.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT (Cont'd)
EC-39

ACTIVE TEST MODE
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
COOLING FAN+Ignition switch: ON
+Operate the cooling fan at
``LOW'', ``HI'' speed and turn
``OFF'' using CONSULT.Cooling fan moves at ``LOW'', ``HI''
speed and stops.+Harness and connector
+Cooling fan motor
OFF ACCEL PO
SIG+Clears the self-learning fully closed accelerator position, detected by accelerator position sensor, from the
ECM.
FUEL CUT SOL/V+Ignition switch: ON
+Turn solenoid valve ``ON'' and
``OFF'' with the CONSULT and
listen to operating sound.Solenoid valve makes an operating
sound.+Harness and connector
+Solenoid valve
EGRC SOL/V A+Ignition switch: ON
+Turn solenoid valve ``ON'' and
``OFF'' with the CONSULT and
listen to operating sound.Solenoid valve makes an operating
sound.+Harness and connector
+Solenoid valve
EGRC SOL/V B+Ignition switch: ON
+Turn solenoid valve ``ON'' and
``OFF'' with the CONSULT and
listen to operating sound.Solenoid valve makes an operating
sound.+Harness and connector
+Solenoid valve
THROT CONT
SOL/V+Ignition switch: ON
+Turn solenoid valve ``ON'' and
``OFF'' with the CONSULT and
listen to operating sound.Solenoid valve makes an operating
sound.+Harness and connector
+Solenoid valve
GLOW RLY+Ignition switch: ON (Engine
stopped)
+Turn the glow relay ``ON'' and
``OFF'' using CONSULT and
listen to operating sound.Glow relay makes the operating
sound.+Harness and connector
+Glow relay
INJ TIMING+Engine: Return to the original
trouble condition
+Retard the injection timing using
CONSULT.If trouble symptom disappears, see
CHECK ITEM.+Adjust initial injection timing
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT (Cont'd)
EC-40

MONITOR ITEM CONDITION SPECIFICATION
COOLING FAN+When cooling fan is stopped. OFF
+When cooling fan operates. ON
I/C FAN RLY+When charge air cooler fan is stopped. OFF
+When charge air cooler fan operates. ON
EGRC SOL/V A+Engine: After warming up
+Air conditioner switch: ``OFF''
+Shift lever: ``N''
+No-loadIdle ON
Revving engine from idle to 3,750 rpm OFF
EGRC SOL/V B+Engine: After warming up
+Air conditioner switch: ``OFF''
+Shift lever: ``N''
+No-loadIdle ON
Revving engine from idle to 2,600 rpm OFF
THROT RLY+Engine: After warming up
+Air conditioner switch: ``OFF''
+Shift lever: ``N''
+No-loadIdle ON
Revving engine from idle to 2,500 rpm OFF
TROUBLE DIAGNOSIS Ð General Description
CONSULT Reference Value in Data Monitor
Mode (Cont'd)
EC-52

TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse
Signal)
8 G/ORCharge air cooler fan
relayEngine is running.
Charge air cooler fan is not operating.BATTERY VOLTAGE
(11 - 14V)
Engine is running.
Charge air cooler fan is operating.0-1V
10 P Fuel temperature sensor Engine is running.
Approximately 0 - 4.8V
Output voltage varies with
fuel temperature.
14 L Cooling fan relayEngine is running.
Cooling fan is not operating.BATTERY VOLTAGE
(11 - 14V)
Engine is running.
Cooling fan is operating.0-1V
15 Y/L Air conditioner relayEngine is running.
Air conditioner switch is ``OFF''.BATTERY VOLTAGE
(11 - 14V)
Engine is running.
Both air conditioner switch and blower fan
switch are ``ON''.
(Compressor is operating.)0-1V
16 L/W Glow lampIgnition switch ``ON''
Glow lamp is ``ON''.0 - 1.5V
Ignition switch ``ON''
Glow lamp is ``OFF''.BATTERY VOLTAGE
(11 - 14V)
18 G Malfunction indicator lampIgnition switch ``ON''
0 - 1.5V
Engine is running.
Idle speedBATTERY VOLTAGE
(11 - 14V)
19 LG/REngine coolant tempera-
ture sensorEngine is running.
Approximately 0 - 4.8V
Output voltage varies with
engine coolant tempera-
ture.
20 R/W Start signalIgnition switch ``ON''
Approximately 0V
Ignition switch ``START''
BATTERY VOLTAGE
(11 - 14V)
21 LG/B Air conditioner switchEngine is running.
Air conditioner switch is ``OFF''.BATTERY VOLTAGE
(11 - 14V)
Engine is running.
Both air conditioner switch and blower fan
switch are ``ON''.
(Compressor is operating.)Approximately 0V
TROUBLE DIAGNOSIS Ð General Description
ECM Terminals and Reference Value (Cont'd)
EC-56

Cooling Fan (Overheat)
SYSTEM DESCRIPTION
Vehicle speed sensorcVehicle speed
ECM
(ECCS-D
control
mod-
ule)
cCooling fan
relayEngine coolant temperature sensorcEngine coolant temperature
Air conditioner switch
cAir conditioner ``ON'' signal
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, air condi-
tioner system pressure and air conditioner ON signal. The control system has 2-step control [ON/OFF].
Operation
CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Speci®cation data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
AIR COND SIG+Engine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
COOLING FAN+When cooling fan is stopped. OFF
+When cooling fan operates. ON
ECM TERMINALS AND REFERENCE VALUE
Remarks: Speci®cation data are reference values and are measured between each terminal andV43(ECCS
ground) with a voltmeter.
TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse
Signal)
14 L Cooling fan relayEngine is running.
Cooling fan is not operating.BATTERY VOLTAGE
(11 - 14V)
Engine is running.
Cooling fan is operating.0-1V
SEF757V
TROUBLE DIAGNOSIS FOR ``OVER HEAT'' (DTC 28)
EC-113

TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse
Signal)
15 Y/L Air conditioner relayEngine is running.
Air conditioner switch is ``OFF''.BATTERY VOLTAGE
(11 - 14V)
Engine is running.
Both air conditioner switch and blower fan
switch are ``ON''.
(Compressor is operating.)0-1V
ON BOARD DIAGNOSIS LOGIC
This diagnosis continuously monitors the engine coolant temperature.
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated.
Diagnostic Trouble
Code No.Malfunction is detected when ...Check Items
(Possible Cause)
28+Cooling fan does not operate properly (Overheat).
+Cooling fan system does not operate properly (Over-
heat).
+Engine coolant was not added to the system using
the proper ®lling method.+Harness or connectors
(The cooling fan circuit is open or shorted.)
+Cooling fan
+Radiator hose
+Radiator
+Radiator cap
+Water pump
+Thermostat
+Fan belt
+Engine coolant temperature sensor
For more information, refer to ``MAIN 12
CAUSES OF OVERHEATING'', EC-120.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant following the procedure in the MA
section (``Changing Engine Coolant'', ``ENGINE MAINTENANCE''). Also, replace the engine oil.
a. Fill radiator with coolant up to speci®ed level with a ®lling speed of 2 liters per minute. Be sure to
use coolant with the proper mixture ratio. Refer to MA section (``Anti-freeze Coolant Mixture Ratio'',
``RECOMMENDED FLUIDS AND LUBRICANTS'').
b. After re®lling coolant, run engine to ensure that no water-¯ow noise is emitted.
TROUBLE DIAGNOSIS FOR ``OVER HEAT'' (DTC 28)
Cooling Fan (Overheat) (Cont'd)
EC-114

OVERALL FUNCTION CHECK
Use this procedure to check the overall function of the cooling fan.
During this check, a DTC might not be con®rmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious
burns could be caused by high pressure ¯uid escaping from
the radiator.
Wrap a thick cloth around the cap. Carefully remove the cap
by turning it a quarter turn to allow built-up pressure to
escape. Then turn the cap all the way off.
1) Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to ``DIAG-
NOSTIC PROCEDURE'', EC-117.
2) Con®rm whether customer ®lled the coolant or not. If customer
®lled the coolant, skip the following steps and go to ``DIAGNOS-
TIC PROCEDURE'', EC-117.
3) Turn ignition switch ``ON''.
4) Perform ``COOLING FAN'' in ``ACTIVE TEST'' mode with
CONSULT and make sure that cooling fan operates
when touching ``ON''.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
3) Disconnect engine coolant temperature sensor harness
connector.
4) Connect 150Wresistor to engine coolant temperature
sensor harness connector.
5) Start engine and make sure that cooling fan operates.
Be careful not to overheat engine.
AEC640
SEF758V
SEF979S
TROUBLE DIAGNOSIS FOR ``OVER HEAT'' (DTC 28)
Cooling Fan (Overheat) (Cont'd)
EC-115