check engine NISSAN PATROL 2000 Electronic Repair Manual

Diagnostic Procedure
1 CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OKcGO TO 2.
NGcRepair or replace.
2 CHECK VARIABLE NOZZLE TURBOCHARGER 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
OKcGO TO 3.
NGcGo to ªDiagnostic Procedureº in ªVARIABLE NOZZLE TURBOCHARGER CONTROL SOLE-
NOID VALVEº, EC-1264.
3 CHECK MASS AIR FLOW SENSOR
1. Start engine and warm it up to normal operating temperature.
2. Check voltage between ECM terminal 35 (Mass air flow sensor signal) and ground.
SEF400Y
3. If the voltage is out of specification, disconnect MAFS harness connector and connect it again.
Then repeat above check.
OK or NG
OKcGO TO 4.
NGcReplace mass air flow sensor.
4 CHECK INTERMIT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-1076.
cINSPECTION END
DTC 0406 INT AIR VOLZD30DDTi
EC-1139

On Board Diagnosis Logic
Malfunction is detected when ... Check Items (Possible Cause)
+An improper signal from the sensor is sent to ECM during
engine running and cranking.+Harness or connectors
(The sensor circuit is open.)
+Crankshaft position sensor (TDC)
DTC Confirmation Procedure
Before performing the following procedure, confirm that
battery voltage is more than 10V.
WITH CONSULT-II
1) Turn ignition switch ªONº and select ªDATA MONITORº
mode with CONSULT-II.
2) Crank engine for at least 1 second.
3) Start engine and run it for at least 2 seconds at idle speed.
4) If DTC is detected, go to ªDiagnostic Procedureº, EC-1143.
WITHOUT CONSULT-II
1) Crank engine for at least 1 second.
2) Start engine and run it for at least 2 seconds at idle speed.
3) Turn ignition switch ªOFFº, wait at least 5 seconds and then
turn ªONº.
4) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º
with ECM.
5) If DTC is detected, go to ªDiagnostic Procedureº, EC-1143.
SEF817Y
DTC 0407 CRANK POS SEN (TDC)ZD30DDTi
EC-1141

Diagnostic Procedure
1 CHECK CRANKSHAFT POSITION SENSOR (TDC) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screws.
SEF227Z
3. Disconnect crankshaft position sensor (TDC) harness connector and ECM harness connector.
SEF230Z
4. Check harness continuity between ECM terminal 47 and terminal 2. Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 2.
NGcRepair open circuit or short to ground or short to power in harness or connectors.
2 CHECK CRANKSHAFT POSITION SENSOR (TDC) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between terminal 1 and ECM terminal 44. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 3.
NGcRepair open circuit or short to ground or short to power in harness or connectors.
3 CHECK CRANKSHAFT POSITION SENSOR SHIELD CIRCUIT
1. Check harness continuity between crankshaft position sensor (TDC) terminal 3 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 5.
NGcGO TO 4.
DTC 0407 CRANK POS SEN (TDC)ZD30DDTi
EC-1143

4 DETECT MALFUNCTIONING PART
Check the following.
+Joint connector-4
+Harness for open or short between crankshaft position sensor (TDC) and engine ground
cRepair open circuit or short to ground or short to power in harness or connectors.
5 CHECK CRANKSHAFT POSITION SENSOR (TDC) INSTALLATION
Check the clearance between crankshaft position sensor (TDC) and protrusion on the crankshaft pulley.
JEF293Z
OK or NG
OKcGO TO 6.
NGcGO TO 7.
6 REINSTALL CRANKSHAFT POSITION SENSOR (TDC)
1. Remove crankshaft position sensor (TDC).
2. Install crankshaft position sensor (TDC) properly.
JEF294Z
cINSPECTION END
DTC 0407 CRANK POS SEN (TDC)ZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1144

On Board Diagnosis Logic
The ECM checks if battery voltage is within the tolerance range for the engine control system.
Malfunction is detected when ... Check Items (Possible Cause)
+ An abnormally high voltage from the battery is sent to ECM. +Incorrect jump starting
+ Battery
+ Alternator
+ ECM
DTC Confirmation Procedure
With CONSULT-II
1) Checkthefollowing.
+ Jumper cables are connected for jump starting.
+ Battery or alternator has been replaced.
If the result is ªYesº for one item or more, skip the following steps and go to ªDiagnostic Procedureº,
EC-1146.
2) Check that the positive battery terminal is connected to battery properly. If NG, reconnect it properly.
3) Check that the alternator functions properly. Refer to EL section (ªCHARGING SYSTEMº).
4) Turn ignition switch ªONº and select ªDATA MONITORº mode with CONSULT-II.
5) Wait one minute.
6) If DTC is detected, go to ªDiagnostic Procedureº, EC-1146. If DTC is not detected, go to next step.
7) Start engine and wait one minute at idle.
8) If DTC is detected, go to ªDiagnostic Procedureº, EC-1146.
Without CONSULT-II
1) Checkthefollowing.
+ Jumper cables are connected for jump starting.
+ Battery or alternator has been replaced.
If the result is ªYesº for one item or more, skip the following steps and go to ªDiagnostic Procedureº,
EC-1146.
2) Check that the positive battery terminal is connected to battery properly. If NG, reconnect it properly.
3) Check that the alternator functions properly. Refer to EL section (ªCHARGING SYSTEMº).
4) Turn ignition switch ªONº and wait one minute.
5) Turn ignition switch ªOFFº, wait 5 seconds and then turn ªONº.
6) Perform ªDiagnostic Test Mode II (Self-diagnostic result)º with ECM.
7) If DTC is detected, go to ªDiagnostic Procedureº, EC-1146. If DTC is not detected, go to next step.
8) Start engine and wait one minute at idle.
9) Turn ignition switch ªOFFº, wait 5 seconds and then turn ªONº.
10) Perform ªDiagnostic Test Mode II (Self-diagnostic result)º with ECM.
11) If DTC is detected, go to ªDiagnostic Procedureº, EC-1146.
Diagnostic Procedure
1 INSPECTION START
Are jumper cables connected for the jump starting?
Yes or No
Yes cGO TO 3.
No cGO TO 2.
DTC 0502 BATTERY VOLTAGEZD30DDTi
EC-1146

System Description
These circuit lines are used to control the smooth shifting up and down of A/T during the hard acceleration/
deceleration.
Voltage signals are exchanged between ECM and TCM (Transmission control module).
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)
24
37
58PU/W
P/B
L/ORA/T signal No. 1
A/T signal No. 2
A/T signal No. 4Engine is running.
Warm-up condition
Idle speedVoltage goes high up
once in a few seconds
SEF448Z
30 P A/T signal No. 3Engine is running.
Warm-up condition
Idle speedApproximately 0V
Engine is running.
Warm-up condition
Engine speed is 2,000 rpmApproximately 7.7V
On Board Diagnosis Logic
Malfunction is detected when ... Check Items (Possible Cause)
+ECM receives incorrect voltage from TCM (Transmission con-
trol module) continuously.+Harness or connectors
[The circuit between ECM and TCM (Transmission control
module) is open or shorted.]
DTC 0504 A/T COMM LINEZD30DDTi
EC-1148

DTC Confirmation Procedure
NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 5 seconds
before conducting the next test.
With CONSULT-II
1) Start engine.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Set selector lever to ªDº position.
4) Accelerate up to 60 km/h (37 MPH) gradually on the accel-
erator pedal.
Do not accelerate with shift down.
5) Stop the vehicle with engine running.
6) If DTC is detected, go to ªDiagnostic Procedureº, EC-1151.
Overall Function Check
Use this procedure to check the overall function of the A/T con-
trol circuit. During this check, a DTC might not be confirmed.
Without CONSULT-II
1) Start engine.
2) Read the voltage signal between ECM terminals 24, 30, 37,
58 and ground with an oscilloscope.
3) Verify that the oscilloscope screen shows the signal wave as
shown under ªECM Terminals and Reference Valueº on the
previous page.
4) If NG, go to ªDiagnostic Procedureº, EC-1151.
SEF817Y
SEF301Z
DTC 0504 A/T COMM LINEZD30DDTi
EC-1149

CONSULT-II Reference Value in Data Monitor
Mode
Remarks: Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
FUEL TEMP SEN+Engine: After warming up More than 40ÉC (104ÉF)
SPILL/V+Engine: After warming up Approx. 13ÉCA
INJ TIMG C/V+Engine: After warming up,
idle the engine.Approx. 50 - 70%
DECELER F/CUT+Engine: After warm-
ing upIdle OFF
BARO SEN+Ignition switch: ONAltitude
Approx.0m(0ft): Approx. 100.62 kPa (1.0062 bar, 1.026 kg/cm
2, 14.59
psi)
Approx. 1,000 m (3,281 ft): Approx. 88.95 kPa (0.8895 bar, 0.907 kg/cm
2,
12.90 psi)
Approx. 1,500 m (4,992 ft): Approx. 83.16 kPa (0.8316 bar, 0.848 kg/cm
2,
12.06 psi)
Approx. 2,000 m (6,562 ft): Approx. 78.36 kPa (0.7836 bar, 0.799 kg/cm
2,
11.36 psi)
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)
33 G/YElectronic control fuel
injection pumpEngine is running.
Warm-up condition
Idle speedApproximately 2.5V
40 R/BElectronic control fuel
injection pumpEngine is running.
Warm-up condition
Idle speedApproximately 2.5V
52 L/BElectronic control fuel
injection pumpEngine is running.
Idle speedApproximately 0.1V
53 L/RElectronic control fuel
injection pumpEngine is running.
Idle speedApproximately 0.35V
On Board Diagnosis Logic
Malfunction is detected when .... Check Items (Possible cause)
+An improper voltage signal from cam position sensor (Built-
into electronic control fuel injection pump) is sent to injection
pump control unit.+Harness or connectors
(Electronic control fuel injection pump circuit is open or
shorted.)
+Electronic control fuel injection pump
DTC 0701 P1zCAM POS SENZD30DDTi
EC-1154

4 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors F4, EC4
+Harness for open or short between electronic control fuel injection pump and engine ground
cRepair open circuit or short to ground or short to power in harness or connectors.
5 CHECK COMMUNICATION LINE FOR OPEN AND SHORT
1. Check continuity between the following terminals. Refer to Wiring Diagram.
MTBL0444
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 7.
NGcGO TO 6.
6 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors F4, EC4
+Harness for open or short between electronic control fuel injection pump and ECM
cRepair open circuit or short to ground or short to power in harness or connectors.
7 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-1076.
OK or NG
OKcReplace electronic control fuel injection pump.
NGcRepair open circuit or short to ground or short to power in harness or connectors.
DTC 0701 P1zCAM POS SENZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1158

CONSULT-II Reference Value in Data Monitor
Mode
Remarks: Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
FUEL TEMP SEN+Engine: After warming up More than 40ÉC (104ÉF)
SPILL/V+Engine: After warming up Approx. 13ÉCA
INJ TIMG C/V+Engine: After warming up,
idle the engine.Approx. 50 - 70%
DECELER F/CUT+Engine: After warm-
ing upIdle OFF
BARO SEN+Ignition switch: ONAltitude
Approx.0m(0ft): Approx. 100.62 kPa (1.0062 bar, 1.026 kg/cm
2, 14.59
psi)
Approx. 1,000 m (3,281 ft): Approx. 88.95 kPa (0.8895 bar, 0.907 kg/cm
2,
12.90 psi)
Approx. 1,500 m (4,992 ft): Approx. 83.16 kPa (0.8316 bar, 0.848 kg/cm
2,
12.06 psi)
Approx. 2,000 m (6,562 ft): Approx. 78.36 kPa (0.7836 bar, 0.799 kg/cm
2,
11.36 psi)
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)
33 G/YElectronic control fuel
injection pumpEngine is running.
Warm-up condition
Idle speedApproximately 2.5V
40 R/BElectronic control fuel
injection pumpEngine is running.
Warm-up condition
Idle speedApproximately 2.5V
52 L/BElectronic control fuel
injection pumpEngine is running.
Idle speedApproximately 0.1V
53 L/RElectronic control fuel
injection pumpEngine is running.
Idle speedApproximately 0.35V
On Board Diagnosis Logic
Malfunction is detected when .... Check Items (Possible cause)
+Injection pump control unit input signal [Crankshaft position
sensor (TDC) signal] processing function is malfunctioning.+Harness or connectors
(Electronic control fuel injection pump circuit is open or
shorted.)
+Electronic control fuel injection pump
DTC 0702 P2zTDC PULSE SIGZD30DDTi
EC-1160