2000 NISSAN PATROL Electronic Repair Manual

Diagnostic Procedure
1 CHECK OVERALL FUNCTION
1. Start engine and let it idle.
2. Make sure that variable nozzle turbocharger control actuator rod moves when revving engine up to 3,000 rpm and returning to
idle.
SEF320Z
OK or NG
OKcINSPECTION END
NGcGO TO 2.
2 CHECK VACUUM SOURCE
1. Turn ignition switch ªOFFº.
2. Disconnect vacuum hose connected to variable nozzle turbocharger control actuator.
3. Start engine and let it idle.
4. Check vacuum hose for vacuum existence.
SEF321Z
OK or NG
OKcGO TO 3.
NGcGO TO 5.
VARIABLE NOZZLE TURBOCHARGER CONTROL
SOLENOID VALVEZD30DDTi
EC-1264

3 CHECK VARIABLE NOZZLE TURBOCHARGER CONTROL ACTUATOR
1. Turn ignition switch ªOFFº.
2. Install a vacuum pump to variable nozzle turbocharger control actuator.
3. Make sure that the variable nozzle turbocharger control actuator rod moves smoothly when applying vacuum of þ53.3 kPa (þ533
mbar, þ400 mmHg, þ15.75 inHg) and releasing it.
SEF322Z
OK or NG
OKcGO TO 4.
NGcReplace turbocharger assembly.
4 CHECK VACUUM HOSE
1. Turn ignition switch ªOFFº.
2. Check vacuum hoses and vacuum gallery for clogging, cracks or improper connection.
SEF109L
OK or NG
OKcGO TO 9.
NGcRepair or replace vacuum hoses and vacuum gallery.
VARIABLE NOZZLE TURBOCHARGER CONTROL
SOLENOID VALVEZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1265

5 CHECK VACUUM HOSE
1. Turn ignition switch ªOFFº.
2. Check vacuum hoses and vacuum gallery for clogging, cracks or improper connection.
SEF109L
OK or NG
OKcGO TO 6.
NGcRepair or replace vacuum hoses and vacuum gallery.
6 CHECK VARIABLE NOZZLE TURBOCHARGER CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect variable nozzle turbocharger control solenoid valve harness connector.
SEF287Z
3. Turn ignition switch ªONº.
4. Check voltage between variable nozzle turbocharger control solenoid valve terminal 2 and ground with CONSULT-II or tester.
SEF314Z
OK or NG
OKcGO TO 8.
NGcGO TO 7.
VARIABLE NOZZLE TURBOCHARGER CONTROL
SOLENOID VALVEZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1266

7 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M21, E127
+Harness connectors E69, E202
+Fuse block (J/B) connector M2
+10A fuse
+Harness for open or short between variable nozzle turbocharger control solenoid valve and fuse
cRepair open circuit or short to ground or short to power in harness or connectors.
8 CHECK VARIABLE NOZZLE TURBOCHARGER CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR
OPEN OR SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 101 and variable nozzle turbocharger control solenoid valve terminal 1. Refer
to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 10.
NGcGO TO 9.
9 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E230, F12
+Harness for open or short between variable nozzle turbocharger control solenoid valve and ECM
cRepair open circuit or short to ground or short to power in harness or connectors.
VARIABLE NOZZLE TURBOCHARGER CONTROL
SOLENOID VALVEZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1267

10 CHECK VARIABLE NOZZLE TURBOCHARGER CONTROL SOLENOID VALVE
1. Disconnect variable nozzle turbocharger control solenoid valve harness connector.
SEF287Z
2. Apply 12V direct current between variable nozzle turbocharger control solenoid valve terminals.
3. Check air passage continuity of variable nozzle turbocharger control solenoid valve under the following conditions.
SEF454Z
OK or NG
OKcGO TO 11.
NGcReplace variable nozzle turbocharger control solenoid valve.
11 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-1076.
cINSPECTION END
VARIABLE NOZZLE TURBOCHARGER CONTROL
SOLENOID VALVEZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1268

Description
With the heat up switch ON, engine speed is increased and the
exhaust gas control valve is closed, which helps to promote
heating and improve heating performance.
The exhaust gas 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 exhaust gas control valve actuator. This operation
closes the exhaust gas control valve. When the ECM sends an
OFF signal, the vacuum signal is cut and the exhaust gas con-
trol valve opens.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
EXH/GAS REG V+Vehicle: Stopped
+Engine speed: Below 1,200 rpm
+Engine coolant temperature: Below 87ÉC (189ÉF)
+Heat up switch: ONON
Except above 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 CONDITION DATA (DC Voltage)
11 BR/YExhaust gas control valve
control solenoid valveEngine is running.
Engine speed is below 1,200 rpm
Engine coolant temperature is below 87ÉC
(189ÉF)
Stop the vehicle
Heat up switch is ªONºApproximately 0.1V
Engine is running.
Except the above conditionBATTERY VOLTAGE
(11 - 14V)
SEF285Z
EXHAUST GAS CONTROL VALVE CONTROL
SOLENOID VALVEZD30DDTi
EC-1269

Wiring Diagram
TEC118M
EXHAUST GAS CONTROL VALVE CONTROL
SOLENOID VALVEZD30DDTi
EC-1270

Diagnostic Procedure
1 INSPECTION START
Do you have CONSULT-II?
Yes or No
YescGO TO 2.
NocGO TO 3.
2 CHECK OVERALL FUNCTION-I
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªCOOLAN TEMP/Sº in ªDATA MONITORº mode with CONSULT-II.
3. Make sure that ªCOOLAN TEMP/Sº indication is below 60ÉC (140ÉF). If out of range, cool down the engine.
NOTE:
The following procedure should be performed before the engine coolant temperature reaches 87ÉC (189ÉF).
4. Disconnect vacuum hose connected to exhaust gas control valve actuator.
5. Start engine and let it idle.
6. Check vacuum hose for vacuum existence under the following conditions.
SEF318Z
OK or NG
OKcGO TO 4.
NGcGO TO 5.
EXHAUST GAS CONTROL VALVE CONTROL
SOLENOID VALVEZD30DDTi
EC-1271