NISSAN PATROL 2000 Electronic Repair Manual

2 CHECK PNP SWITCH CIRCUIT
With CONSULT-II
1. Select ªA/Tº and then select ªP/N POSI SWº in ªDATA MONITORº mode with CONSULT-II.
2. Check ªP/N POSI SWº signal under the following conditions.
SEF049Y
OK or NG
OKcGO TO 9.
NGcGO TO 4.
3 CHECK PNP SWITCH CIRCUIT
Without CONSULT-II
1. Turn ignition switch ªOFFº.
2. Disconnect TCM (Transmission control module) harness connector.
SEF792V
3. Turn ignition switch ªONº.
4. Check voltage between TCM terminal 36 and ground under the following conditions.
SEF298Z
OK or NG
OKcGO TO 9.
NGcGO TO 4.
PARK/NEUTRAL POSITION (PNP) SWITCHZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1238

4 CHECK PNP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect PNP switch harness connector.
3. Turn ignition switch ªONº.
4. Check voltage between PNP switch terminal 3 and ground with CONSULT-II or tester.
SEF299Z
OK or NG
OKcGO TO 6.
NGcGO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Fuse block (J/B) connector E112
+7.5A fuse
+Harness for open or short between PNP switch and fuse
cRepair open circuit or short to ground or short to power in harness or connectors.
6 CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT-I
1. Turn ignition switch ªOFFº.
2. Disconnect TCM (Transmission control module) harness connector.
3. Check harness continuity between TCM terminal 36 and PNP switch terminals 7, 9 under the following conditions.
SEF300Z
4. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 8.
NGcGO TO 7.
PARK/NEUTRAL POSITION (PNP) SWITCHZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1239

7 DETECT MALFUNCTIONING PART
Check the following.
+Diode E103
+Harness for open or short between PNP switch and TCM (Transmission control module)
cRepair open circuit or short to ground or short to power in harness or connectors.
8 CHECK PARK/NEUTRAL POSITION (PNP) SWITCH
Refer to ªTROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMSº in AT section.
OK or NG
OKcGO TO 9.
NGcReplace park/neutral position (PNP) switch.
9 CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT-II
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 22 and TCM terminal 14. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 11.
NGcGO TO 10.
10 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors F7, M52
+Harness connectors M21, E127
+Harness for open or short between ECM and TCM (Transmission control module)
cRepair open circuit or short to ground or short to power in harness or connectors.
11 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-1076.
cINSPECTION END
PARK/NEUTRAL POSITION (PNP) SWITCHZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1240

Component Description
The heat up switch is located on the lower side of the instrument
panel. This switch is used to speed up the heater's operation
when the engine is cold.
When the ECM received the heat up switch ªONº signal, the
ECM increases the engine idle speed to 1,100 to 1,200 rpm to
warm up engine quickly.
This system works when all conditions listed below are met.
Heat up switch ON
Engine coolant temperature Below 105ÉC (221ÉF)
Shift lever ªPº or ªNº
Accelerator pedal Fully released
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
WARM UP SW+Ignition switch: ONHeat up switch: ON ON
Heat up switch: OFF OFF
ECM Terminals and Reference Value
Specification 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 damage the
ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse
Signal)
59 BR/W Heat up switchIgnition switch ªONº
Heat up switch is ªOFFº.0V
Ignition switch ªONº
Heat up switch is ªONº.BATTERY VOLTAGE
(11 - 14V)
SEF803V
HEAT UP SWITCHZD30DDTi
EC-1241

Wiring Diagram
TEC110M
HEAT UP SWITCHZD30DDTi
EC-1242

Diagnostic Procedure
1 INSPECTION START
Do you have CONSULT-II?
Yes or No
YescGO TO 2.
NocGO TO 3.
2 CHECK OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch ªONº.
2. Check ªWARM UP SWº in ªDATA MONITORº mode with CONSULT-II under the following conditions.
SEF302Z
OK or NG
OKcINSPECTION END
NGcGO TO 4.
3 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Check voltage between ECM terminal 59 and ground under the following conditions.
SEF303Z
OK or NG
OKcINSPECTION END
NGcGO TO 4.
HEAT UP SWITCHZD30DDTi
EC-1243

4 CHECK HEAT UP SWITCH POWER SUPPLY CIRCUIT
1. Turn heat up switch ªOFFº.
2. Turn ignition switch ªOFFº.
3. Disconnect heat up switch harness connector.
4. Turn ignition switch ªONº.
5. Check voltage between heat up switch terminal 6 and ground with CONSULT-II or tester.
SEF304Z
OK or NG
OKcGO TO 6.
NGcGO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Fuse block (J/B) connector M3
+10A fuse
+Harness for open or short between heat up switch and fuse
cRepair open circuit or short to ground or short to power in harness or connectors.
6 CHECK HEAT UP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 59 and heat up switch terminal 5. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 8.
NGcGO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M51, F6
+Harness for open or short between heat up switch and ECM
cRepair open circuit or short to ground or short to power in harness or connectors.
HEAT UP SWITCHZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1244

8 CHECK HEAT UP SWITCH
Check continuity between heat up switch terminals 5 and 6 under the following conditions.
SEF305Z
OK or NG
OKcGO TO 9.
NGcReplace heat up switch.
9 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-1076.
cINSPECTION END
HEAT UP SWITCHZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1245

Description
SYSTEM DESCRIPTION
Sensor Input Signal to ECMECM
FunctionActuator
Ignition switch Start signal
Swirl
control
valve
controlSwirl control valve control solenoid valve
¯Vacuum signal
Swirl control valve actuator
¯Swirl control valve Crankshaft position sensor (TDC) Engine speed
PNP switch Park/Neutral position signal
Engine coolant temperature sensor Engine coolant temperature
This system has a swirl control valve in the throttle body.
While idling and during low engine speed operation, the swirl
control valve closes. Thus the velocity of the air in the intake
passage increases, promoting the vaporization of the fuel and
producing a swirl in the combustion chamber.
Because of this operation, this system tends to increase the
burning speed of the gas mixture, improve fuel consumption, and
increase the stability in running conditions.
Also, except when idling and during low engine speed operation,
this system opens the swirl control valve. In this condition, this
system tends to increase power by improving intake efficiency
via reduction of intake flow resistance, intake flow.
The solenoid valve controls swirl control valve's shut/open con-
dition. This solenoid valve is operated by the ECM.
PNP switch Engine speedEngine cool-
ant tempera-
tureSwirl control
valve control
solenoid valveSwirl control
valve
OFFLess than
1,250 rpmLess than
50ÉC (122ÉF)OFF Open
More than
50ÉC (122ÉF)ON Closed
More than
1,250 rpmLess than
50ÉC (122ÉF)OFF Open
More than
50ÉC (122ÉF)OFF Open
ON Ð Ð OFF Open
SEF452Z
SWIRL CONTROL VALVE CONTROL
SOLENOID VALVEZD30DDTi
EC-1246

COMPONENT DESCRIPTION
Swirl control valve control solenoid valve
The swirl control valve control solenoid valve responds to signals
from the ECM. When the ECM sends an ON (ground) signal, the
solenoid valve is bypassed to apply vacuum pump vacuum to the
swirl control valve actuator. This operation closes the swirl con-
trol valve. When the ECM sends an OFF signal, the vacuum
signal is cut and the swirl control valve opens.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
SWRL CONT S/V+Lift up the vehicle
+Engine: After warming up, let it
idle for more than 1 second.
+Air conditioner switch: OFF
+No-loadShift lever: Except ªPº and ªNeutralº
positionON
Shift lever: ªNeutralº position OFF
ECM Terminals and Reference Value
Specification 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 damage the
ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse
Signal)
54 L/BSwirl control valve control
solenoid valveEngine is running.
Warm-up condition
At idle speed for more than 1 second.
Lift up the vehicle
Gear position is except ªPº and ªNeutralºApproximately 0.1V
Engine is running.
Idle speed
Lift up the vehicle
Gear position is ªPº or ªNeutralºBATTERY VOLTAGE
(11 - 14V)
SEF284Z
SWIRL CONTROL VALVE CONTROL
SOLENOID VALVEZD30DDTi
Description (Cont'd)
EC-1247