2006 NISSAN PATROL air condition

Needle Lift Sensor (NLS)
The needle lift sensor is built into the No. 1 injection nozzle. Its
piezoelectric element senses changes in fuel injection timing
caused by fuel temperature, etc. This change of fuel injection tim-
ing is sent as a pulse signal to the ECM.
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)
34 W Needle lift sensorEngine is running.
(Warm-up condition)
Idle speedApproximately 0V
SEF718V
Engine is running.(Warm-up condition)
Engine speed is 2,000 rpm.Approximately 0V
SEF719V
ON BOARD DIAGNOSIS LOGIC
Diagnostic
Trouble Code
No.Malfunction is detected when ....Check Items
(Possible Cause)
34+An improper signal from the sensor is sent to ECM.+Harness or connectors
(The sensor circuit is open or shorted.)
+Needle lift sensor
+Air in fuel line
+Clogging No. 1 injection nozzle
SEF604S
Terminal
Piezoelectric element
TROUBLE DIAGNOSIS FOR ``NEEDLE LIFT SEN'' (DTC 34)
EC-126

EGRC-Solenoid Valve A, B and Throttle Control
Solenoid Valve
SYSTEM DESCRIPTION
Camshaft position sensor (TDC)cEngine speed
ECM
(ECCS-D
control
module)cEGRC-solenoid valve A
Accelerator position sensorcAccelerator positioncEGRC-solenoid valve B
Engine coolant temperature sensorcEngine coolant temperaturecThrottle control solenoid valve
Ignition switchcStart signal
Mass air ¯ow sensor
cAmount of intake air
The ECM receives signals sent from the engine coolant tempera-
ture sensor, crankshaft position sensor (TDC), ignition switch, mass
air ¯ow sensor and accelerator position sensor to determine engine
speed and operating conditions. Based on these signals, the ECM
controls EGR control solenoid valve (A and B) operation and
throttle control solenoid valve operation.
Engine coolant
temperature
ÉC (ÉF)LoadEGRC-solenoid valve
Throttle control
solenoid valveEGR valveThrottle control
valveAmount of EGR
gas
AB
Below 70 (158) AnyOFF
(Closed)OFF
(Closed)OFF
(Closed)Fully closed Fully open Ð
Above 70 (158)Low loadON
(Open)ON
(Open)ON
(Open)Fully open Closed Large
Medium load-1ON
(Open)ON
(Open)OFF
(Closed)Fully open Fully open Medium
Medium load-2ON
(Open)OFF
(Closed)OFF
(Closed)Half open Fully open Small
High loadOFF
(Closed)OFF
(Closed)OFF
(Closed)Fully closed Fully open Ð
COMPONENT DESCRIPTION
The EGRC-solenoid valves A and B control vacuum pressure act-
ing on the EGR valve. The EGR control valve will then be fully
opened, half-opened or fully closed, as required.
The throttle control solenoid valve controls vacuum pressure acting
on the throttle chamber. Thus, intake air passages are opened or
closed in relation to exhaust gas and intake air. Utilizing the rela-
tionship between exhaust gas pressure and intake air pressure
control, the amount of EGR (exhaust gas recirculated) is regulated
in three stages Ð large, medium, small.
SEF784V
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
EC-156

CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Speci®cation data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
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
rpmOFF
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
rpmOFF
THROT RLY+Engine: After warming up
+Air conditioner switch: ``OFF''
+Shift lever: ``N''
+No-loadIdle ON
Revving engine from idle to 2,500
rpmOFF
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)
1WThrottle control solenoid
valveEngine is running.
(Warm-up condition)
Idle speedApproximately 0.4V
Engine is running.
(Warm-up condition)
Revving engine from idle to 2,500 rpmBATTERY VOLTAGE
(11 - 14V)
103 L/Y EGRC-solenoid valve AEngine is running.
(Warm-up condition)
Idle speed0-1V
Engine is running.
(Warm-up condition)
Revving engine from idle up to 3,750 rpm.BATTERY VOLTAGE
(11 - 14V)
109 BR/Y EGRC-solenoid valve BEngine is running.
(Warm-up condition)
Idle speed0-1V
Engine is running.
(Warm-up condition)
Revving engine from idle up to 2,600 rpm.BATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
EGRC-Solenoid Valve A, B and Throttle Control
Solenoid Valve (Cont'd)
EC-157

COMPONENT INSPECTION
EGR valve
Apply vacuum to EGR vacuum port with a hand vacuum pump.
EGR valve spring should lift.
If NG, replace EGR valve.
Throttle control valve
Apply vacuum to throttle control valve vacuum port with a hand
vacuum pump.
Throttle control valve should close.
If NG, replace throttle control valve.
EGRC-solenoid valve A, B and throttle control solenoid
valve
Check air passage continuity.
ConditionAir passage
continuity
betweenj
AandjB
Air passage
continuity
betweenj
AandjC
12V direct current supply
between terminals
V1
andV2
Ye s N o
No supply No Yes
If NG, replace solenoid valve(s).
MEF137D
SEF707V
MEC488B
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
EGRC-Solenoid Valve A, B and Throttle Control
Solenoid Valve (Cont'd)
EC-162

DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK OVERALL FUNCTION.
1. Turn ignition switch ``ON''.
2. Select ``FULL ACCEL SW'' and
``OFF ACCEL SW'' in ``DATA
MONITOR'' mode with CON-
SULT.
3. Check ``FULL ACCEL SW'' and
``OFF ACCEL SW'' signal under
the following conditions.
OFF ACCEL SW:
Accelerator pedal released
ON
Accelerator pedal
depressed OFF
FULL ACCEL SW:
Accelerator pedal released
OFF
Accelerator pedal fully
depressed ON
--------------------------------------------------------------------------------------------------------------------------------------OR--------------------------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch ``ON''.
2. Check voltage between ECM
terminal
V31and ground under
the following conditions.
Voltage:
Accelerator pedal released
Battery voltage
Accelerator pedal
depressed
Approximately 0V
3. Check voltage between ECM
terminal
V32and ground under
the following conditions.
Voltage:
Accelerator pedal released
Approximately 0V
Accelerator pedal fully
depressed
Battery voltage
NG
cOK
INSPECTION END
CHECK POWER SUPPLY.
1. Turn ignition switch ``OFF''.
2. Disconnect accelerator position switch
harness connector.
3. Turn ignition switch ``ON''.
4. Check voltage between terminal
V5
and ground with CONSULT or tester.
Voltage: Battery voltage
OK
cNG
Check the following.
+Harness connectors
M52,F7(LHD mod-
els)
+Harness for open or
short between accelera-
tor position switch and
ECCS relay
+Harness for open or
short between accelera-
tor position switch and
ECM
If NG, repair harness or
connectors.
jA
SEF626S
SEF627S
SEF708V
SEF786V
.
.
.
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
Accelerator Position Switch (Cont'd)
EC-167

A/T models
INSPECTION START
CHECK OVERALL FUNCTION.
1. Turn ignition switch ``ON''.
2. Select ``P/N POSI SW'' in
``DATA MONITOR'' mode with
CONSULT.
3. Check ``P/N POSI SW'' signal
under the following conditions.
``P'' or ``N'' position: ON
Except above positions: OFF
--------------------------------------------------------------------------------------------------------------------------------------OR--------------------------------------------------------------------------------------------------------------------------------------
2. Check voltage between ECM
terminal
V22and ground under
the following conditions.
Voltage:
``P'' or ``N'' position
Approximately 0V
Except above positions
Battery voltage
NG
cOK
INSPECTION END
CHECK POWER SUPPLY.
1. Turn ignition switch ``OFF''.
2. Disconnect inhibitor switch harness con-
nector.
3. Turn ignition switch ``ON''.
4. Check voltage between terminal
V3and
ground with CONSULT or tester.
Voltage: Battery voltage
OK
cNG
Check the following.
+7.5A fuse
+Harness for open or short
between inhibitor switch
and fuse
If NG, repair harness or
connectors.
jA
SEF963N
SEF622S
SEF790V
SEF791V
SEF792V
.
.
.
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
Park/Neutral Position Switch (Cont'd)
EC-173

Charge Air Cooler Fan Control
SYSTEM DESCRIPTION
Crankshaft position sensor (TDC)cEngine speed
ECM
cCharge air cooler fan relayCharge air temperature sensorcCharge air temperature
Ignition switch
cStart signal
The ECM controls the charge air cooler fan operation corresponding to the engine speed, the charge air tem-
perature and the start signal. The control system has 2-step control [ON/OFF]. The ECM does not directly drive
the charge air cooler fan. It controls the ON/OFF charge air cooler fan relay, which in turn controls the charge
air cooler fan.
When the charge air temperature is above 67ÉC (153ÉF) and engine speed is more than 1,600 rpm, the charge
air cooler fan operates.
CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Speci®cation data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
I/C FAN RLY+When charge air cooler fan is stopped. OFF
+When charge air cooler 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)
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
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
EC-178

COMPONENT INSPECTION
Charge air cooler fan relay
Check continuity between terminalsV3andV5.
Conditions Continuity
12V direct current supply between
terminals
V1andV2Ye s
No current supply No
If NG, replace relay.
Charge air cooler fan motor
1. Disconnect charge air cooler fan motor harness connector.
2. Supply charge air cooler fan motor terminals with battery volt-
age and check operation.
Charge air cooler fan motor should operate.
If NG, replace charge air cooler fan motor.
SEF511P
SEF802V
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
Charge Air Cooler Fan Control (Cont'd)
EC-182