2001 NISSAN PATROL coolant

ENGINE CONTROL SYSTEM
SECTION
EC
CONTENTS
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM............................................................... 2003
Circuit Diagram ................................................ 2003
TROUBLE DIAGNOSIS FOR POWER
SUPPLY............................................................... 2004
Main Power Supply and Ground Circuit .......... 2004
DTC 0102 MASS AIR FLOW SEN...................... 2006
Wiring Diagram ................................................ 2006
DTC 0103 COOLANT TEMP SEN...................... 2007
Wiring Diagram ................................................ 2007
DTC 0104 VEHICLE SPEED SEN...................... 2008
Wiring Diagram ................................................ 2008
DTC 0203 ACCEL POS SW (F/C)...................... 2009
Wiring Diagram ................................................ 2009
DTC 0208 OVER HEAT....................................... 2010
Wiring Diagram ................................................ 2010
Diagnostic Procedure....................................... 2011
Component Inspection ..................................... 2016
Main 12 Causes of Overheating ...................... 2017
DTC 0402 P9zFUEL TEMP SEN......................... 2018
Wiring Diagram ................................................ 2018
DTC 0403 ACCEL POS SENSOR...................... 2019
Wiring Diagram ................................................ 2019
DTC 0504 A/T COMM LINE................................ 2021
Wiring Diagram ................................................ 2021
DTC 0701 P1zCAM POS SEN............................. 2022
Wiring Diagram ................................................ 2022
DTC 0702 P2zTDC PULSE SIG........................... 2023
Wiring Diagram ................................................ 2023
DTC 0703 P3zPUMP COMM LINE...................... 2024
Wiring Diagram ................................................ 2024
DTC 0704 P4zSPILL/V CIRC, DTC 0706
P6zSPILL VALVE................................................. 2025Wiring Diagram ................................................ 2025
DTC 0707 P7zF/INJ TIMG FB.............................. 2026
Wiring Diagram ................................................ 2026
DTC 0807 ECM 14............................................... 2027
Wiring Diagram ................................................ 2027
DTC 0902 ECM RLY........................................... 2028
Wiring Diagram ................................................ 2028
DTC 0905 TURBO PRESSURE.......................... 2029
Wiring Diagram ................................................ 2029
DTC 1003 EGR VOLUME CONT/V..................... 2030
Wiring Diagram ................................................ 2030
DTC 1004 FUEL CUT SYSTEM1........................ 2031
Wiring Diagram ................................................ 2031
GLOW CONTROL SYSTEM............................... 2032
Wiring Diagram ................................................ 2032
START SIGNAL................................................... 2033
Wiring Diagram ................................................ 2033
PARK/NEUTRAL POSITION (PNP) SWITCH.... 2034
Wiring Diagram ................................................ 2034
HEAT UP SWITCH.............................................. 2035
Wiring Diagram ................................................ 2035
SWIRL CONTROL VALVE CONTROL
SOLENOID VALVE.............................................. 2036
Wiring Diagram ................................................ 2036
INTAKE AIR CONTROL VALVE CONTROL
SOLENOID VALVE.............................................. 2037
Wiring Diagram ................................................ 2037
AIR CONDITIONER CONTROL.......................... 2038
Wiring Diagram ................................................ 2038
MI (MIL) & DATA LINK CONNECTORS............ 2039
Wiring Diagram ................................................ 2039

EC

Wiring Diagram
TEC183M
DTC 0103 COOLANT TEMP SEN
EC-2007

Diagnostic Procedure
1 INSPECTION START
Do you have CONSULT-II?
Yes or No
YescGO TO 2.
NocGO TO 3.
2 CHECK COOLING FAN OPERATION
With CONSULT-II
1. Turn ignition switch ªONº.
2. Perform ªCOOLING FANº in ªACTIVE TESTº mode with CONSULT-II.
SEF646X
3. Make sure that cooling fan-1 operates.
OK or NG
OKcGO TO 12.
NGcGO TO 4.
3 CHECK COOLING FAN OPERATION
Without CONSULT-II
1. Turn ignition switch ªOFFº.
2. Disconnect engine coolant temperature sensor harness connector.
3. Connect 150Wresistor to engine coolant temperature sensor harness connector.
4. Restart engine and make sure that cooling fan operates.
MEC475B
OK or NG
OKcGO TO 12.
NGcGO TO 4.
DTC 0208 OVER HEAT
EC-2011

16 CHECK ENGINE COOLANT TEMPERATURE SENSOR
1. Remove engine coolant temperature sensor.
2. Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.
SEF304X
OK or NG
OKcGO TO 17.
NGcReplace engine coolant temperature sensor.
17 CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to ªMAIN 12 CAUSES OF OVERHEATINGº, EC-2017.
cINSPECTION END
Component Inspection
FUEL PUMP RELAY
Check continuity between terminals 3 and 5.
Conditions Continuity
12V direct current supply between
terminals 1 and 2Yes
No current supply No
If NG, replace relay.SEF145X
DTC 0208 OVER HEAT
Diagnostic Procedure (Cont'd)
EC-2016

Main 12 Causes of Overheating
Engine Step Inspection item Equipment Standard Reference page
OFF 1+Blocked radiator
+Blocked condenser
+Blocked radiator grille
+Blocked bumper+Visual No blocking Ð
2+Coolant mixture+Coolant tester 30 - 50% coolant mixture See ªRECOMMENDED
FLUIDS AND LUBRI-
CANTSº in MA section.
3+Coolant level+Visual Coolant up to MAX level
in reservoir tank and
radiator filler neckSee ªChanging Engine
Coolantº, ªENGINE MAIN-
TENANCEº in MA sec-
tion.
4+Radiator cap+Pressure tester 78 - 98 kPa
(0.78 - 0.98 bar, 0.8 - 1.0
kg/cm
2, 11 - 14 psi)
59 - 98 kPa (0.59 - 0.98
bar, 0.6 - 1.0 kg/cm
2,
9 - 14 psi) (Limit)See ªSystem Checkº,
ªENGINE COOLING SYS-
TEMº in LC section.
ON*2 5+Coolant leaks+Visual No leaks See ªSystem Checkº,
ªENGINE COOLING SYS-
TEMº in LC section.
ON*2 6+Thermostat+Touch the upper and
lower radiator hosesBoth hoses should be hot. See ªThermostatº and
ªRadiatorº, ªENGINE
COOLING SYSTEMº in
LC section.
ON*1 7+Cooling fan+Visual Operating See ªDTC 0208 OVER
HEATº.
OFF 8+Combustion gas leak+Color checker chemical
tester 4 gas analyzerNegative Ð
ON*3 9+Coolant temperature
gauge+Visual Gauge less than 3/4
when drivingÐ
+Coolant overflow to res-
ervoir tank+Visual No overflow during driving
and idlingSee ªChanging Engine
Coolantº, ªENGINE MAIN-
TENANCEº in MA sec-
tion.
OFF*4 10+Coolant return from res-
ervoir tank to radiator+Visual Should be initial level in
reservoir tankSee ªENGINE MAINTE-
NANCEº in MA section.
OFF 11+Cylinder head+Straight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping)See ªInspectionº, ªCYLIN-
DER HEADº in EM sec-
tion.
12+Cylinder block and pis-
tons+Visual No scuffing on cylinder
walls or pistonSee ªInspectionº, ªCYLIN-
DER BLOCKº in EM sec-
tion.
*1: Engine running at idle.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to ªOVERHEATING CAUSE ANALYSISº in LC section.
DTC 0208 OVER HEAT
EC-2017

Bulb Replacement
The headlamp is a semi-sealed beam type which uses a replace-
able halogen bulb. The bulb can be replaced from the engine
compartment side without removing the headlamp body.
+Grasp only the plastic base when handling the bulb.
Never touch the glass envelope.
1. Disconnect the battery cable.
2. Turn the bulb retaining ring counterclockwise until it is free
from the headlamp reflector, and then remove it.
3. Disconnect the harness connector from the back side of the
bulb.
4. Remove the headlamp bulb carefully. Do not shake or rotate
the bulb when removing it.
5. Install in the reverse order of removal.
CAUTION:
Do not leave headlamp reflector without bulb for a long
period of time. Dust, moisture, smoke, etc. entering head-
lamp body may affect the performance of the headlamp.
Remove headlamp bulb from the headlamp reflector just
before a replacement bulb is installed.
Aiming Adjustment
When performing headlamp aiming adjustment, use an aiming
machine, aiming wall screen or headlamp tester. Aimers should
be in good repair, calibrated and operated in accordance with
respective operation manuals.
If any aimer is not available, aiming adjustment can be done as
follows:
For details, refer to the regulations in your own country.
a. Keep all tires inflated to correct pressures.
b. Place vehicle and tester on one and same flat surface.
c. See that there is no-load in vehicle (coolant, engine oil
filled up to correct level and full fuel tank) other than the
driver (or equivalent weight placed in driver's position).
CAUTION:
Be sure aiming switch is set to ª0º when performing aiming
adjustment on vehicles equipped with headlamp aiming
control.
SEL995K
SEL466V
HEADLAMP/WAGON AND HARDTOP MODELS Ð Conventional Type Ð
EL-2035

Wiring Diagram Codes (Cell Codes)
Use the chart below to find out what each wiring diagram code
stands for.
Refer to the wiring diagram code in the alphabetical index to find
the location (Page number) of each wiring diagram.
Code Section Wiring Diagram Name
A/C, A HA Auto Air Conditioner
A/C, M HA Manual Air Conditioner
A/CCUT EC Air Conditioner Control
A/T AT A/T
AAC/V EC IACV-AAC Valve
ABS BR Anti-lock Brake System
ACC/SW EC Accelerator Switch (F/C)
APS EC Accelerator Position Sensor
ASCD EL Automatic Speed Control Device
AT/C EC A/T Control
AUDIO EL Audio
BACK/L EL Back-up Lamp
BCDD EC BCDD System
BOOST EC Turbo Charger Boost Sensor
BRK/SW EC Brake Switch Signal
CD/CHG EL CD Auto Changer
CHARGE EL Charging System
CHIME EL Warning Chime
CHOKE EC Automatic Choke
CIGAR EL Cigarette Lighter
CMPS EC Camshaft Position Sensor
COMPAS EL Compass and Thermometer
COOL/B HA Cool Box
COOL/F EC Cooling Fan Control
CORNER EL Cornering Lamp
D/LOCK EL Power Door Lock
DEICER EL Wiper Deicer
DEF EL Rear Window Defogger
DIFF/L PD Differential Lock Control System
DTRL ELHeadlamp Ð With Daytime Light
System
ECMRLY EC ECM Relay
ECTS EC Engine Coolant Temperature Sensor
EGVC/V EC EGR Volume Control Valve
EPS STElectric Controlled Power Steering
system
F/FOG EL Front Fog Lamp
F/PUMP EC Fuel Pump
FCUT EC Fuel Cut SystemCode Section Wiring Diagram Name
FICD EC IACV-FICD Solenoid Valve
FPCM EC Fuel Pump Control Module
GLOW EC Quick Glow System
H/AIM EL Headlamp Aiming Control System
H/LAMP EL Headlamp
HEATUP EC Heat up Switch
HLC EL Headlamp Cleaner
HORN EL Horn
IGN EC Ignition System
IGNSYS EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INJPMP ECElectronic Control Fuel Injection
Pump
INT/V ECIntake Air Control Valve Control
Solenoid Valve
IVC ECIntake Valve Timing Control Solenoid
Valve
KS EC Knock Sensor
LOAD EC Load Signal
MAFS EC Mass Air Flow Sensor
MAIN ECMain Power Supply and Ground Cir-
cuit
METER ELSpeedometer, Tachometer, Temp.,
Oil and Fuel Gauges
MIL/DL EC Mil and Data Link Connectors
MIRROR EL Door Mirror
MULTI EL Multi-remote Control System
NATS EL Nissan Anti-Theft System
P/ANT EL Power Antenna
PGC/V ECEVAP Canister Purge Volume Con-
trol Solenoid Valve
PNP/SW EC Park/Neutral Position Switch
POWER EL Power Supply Routing
PST/SW EC Power Steering Oil Pressure Switch
R/COOL HA Rear Cooler System
R/FOG EL Rear Fog Lamp
R/HEAT HA Rear Heater System
REMOTE EL Audio (Remote Control Switch)
ROOM/L EL Interior Room Lamp
WIRING DIAGRAM CODES (CELL CODES)
EL-2132

A
A/T - Wiring diagram ............................. AT-2003
A/T control ............................................. EC-2021
A/T shift lock system ............................. AT-2013
ABS - Wiring diagram ........................... BR-2003
APS - Wiring diagram ........................... EC-2019
AT/C - Wiring diagram .......................... EC-2021
AUDIO - Wiring diagram ....................... EL-2088
Accelerator position sensor .................. EC-2019
Air bag disposal .................................... RS-2009
Air bag ................................................... RS-2003
Air flow meter - See Mass air flow
sensor ................................................ EC-2006
Anti-lock brake system - Wiring
diagram ............................................. BR-2002
Audio ...................................................... EL-2088
B
BACK/L - Wiring diagram ...................... EL-2047
BOOST - Wiring diagram ...................... EC-2029
Back-up lamp ......................................... EL-2047
Bumper, front ....................................... BT-2003
C
CD/CHG - Wiring diagram ..................... EL-2092
CIGAR - Wiring diagram ....................... EL-2085
COOL/F - Wiring diagram ..................... EC-2010
Cigarette lighter ..................................... EL-2085
Clutch cover .......................................... CL-2005
Clutch damper ....................................... CL-2004
Clutch master cylinder ........................... CL-2004
Clutch operating cylinder ....................... CL-2003
Combination meter ................................ EL-2062
Cool box - Wiring diagram .................... HA-2011
Coolant replacement ............................ MA-2003
Cooling circuit (engine) ......................... LC-2002
Cooling fan control ................................ EC-2010
D
DEICER - Wiring diagram ..................... EL-2086
DTRL - Wiring diagram ......................... EL-2037
Daytime light system ............................. EL-2037
Diagnosis sensor unit ........................... RS-2005
E
ECCS-D control module ............. EC-2027, 2028
ECTS - Wiring diagram ......................... EC-2007
EGR - Wiring diagram .......................... EC-2030
EGR volume control valve .................... EC-2030
Electrical unit ......................................... EL-2136Electrical units location .......................... EL-2103
Electronic fuel injection pump .... EC-2018, 2022,
2023, 2024, 2025, 2026, 2031
Engine control circuit diagram .............. EC-2003
Engine coolant temperature sensor
(ECTS) .............................................. EC-2007
Exterior .................................................. BT-2006
F
F/FOG - Wiring diagram ........................ EL-2048
Fluids .................................................... MA-2002
Flywheel (clutch) ................................... CL-2005
Fog lamp, front ...................................... EL-2048
Front bumper ......................................... BT-2003
Front fog lamp ....................................... EL-2048
Front passenger air bag ....................... RS-2003
Fuel gauge ............................................. EL-2062
Fuse block ............................................. EL-2134
Fuse ....................................................... EL-2135
Fusible link ............................................. EL-2135
G
Gauges .................................................. EL-2062
Grease .................................................. MA-2002
Ground distribution ................................ EL-2014
H
H/LAMP - Wiring diagram ..................... EL-2034
HEAT UP - Wiring diagram .................. EC-2035
HLC - Wiring diagram ............................ EL-2083
HORN - Wiring diagram ........................ EL-2084
Harness layout ............................ EL-2106, 2108
Hazard warning lamp ............................ EL-2050
Headlamp wiper ..................................... EL-2083
Headlamp .................................... EL-2034, 2037
Heat up switch ...................................... EC-2035
Hood ...................................................... BT-2003
Horn ....................................................... EL-2084
I
ILL - Wiring diagram .............................. EL-2055
Illumination ............................................. EL-2054
J
Junction box (J/B) .................................. EL-2134
ALPHABETICAL INDEX
IDX-2002