2006 NISSAN PATROL Service Manual

TEC437
TROUBLE DIAGNOSIS FOR ``CRANK POS SEN (TDC)'' (DTC 47)
Crankshaft Position Sensor (TDC) (Cont'd)
EC-146

DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK INPUT SIGNAL CIRCUIT.
1. Turn ignition switch ``OFF''.
2. Disconnect crankshaft position sensor
(TDC) harness connector and ECM har-
ness connector.
3. Check harness continuity between ECM
terminals
V40,V44and terminalV1.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Check the following.
+Harness connectors
F13,EC4+Harness for open or
short between ECM and
crankshaft position sen-
sor (TDC)
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK GROUND CIRCUIT-I.
Check harness continuity between termi-
nal
V2and ECM terminalsV47,V52.
Continuity should exist.
If OK, check harness for short to ground
and short to power.
OK
cNG
Check the following.
+Harness connectors
F13,EC4+Harness for open or
short between crankshaft
position sensor (TDC)
and ECM
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK GROUND CIRCUIT-II.
1. Loosen and retighten engine ground
screws.
2. Disconnect harness connectors
F13,EC4.
3. Check harness continuity between ter-
minal
V3and engine ground.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Check the following.
+Joint connector
F19+Harness for open or
short between harness
connector
F13and
engine ground
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK COMPONENT
[Crankshaft position sensor (TDC)].
Refer to ``COMPONENT INSPECTION''
on next page.
OK
cNG
Replace crankshaft posi-
tion sensor (TDC).
Disconnect and reconnect harness connec-
tors in the circuit. Then retest.
Trouble is not ®xed.
Check ECM pin terminals for damage and
check the connection of ECM harness con-
nector. Reconnect ECM harness connector
and retest.
INSPECTION END
SEF696V
SEF774V
SEF775V
SEF676V
SEF776V
.
.
.
.
.
.
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TROUBLE DIAGNOSIS FOR ``CRANK POS SEN (TDC)'' (DTC 47)
Crankshaft Position Sensor (TDC) (Cont'd)
EC-147

COMPONENT INSPECTION
Crankshaft position sensor (TDC)
1. Disconnect crankshaft position sensor (TDC) harness connec-
tor.
2. Loosen the ®xing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor for chipping.
5. Check resistance between terminals
V1andV2.
Resistance: Approximately 0.8 - 1.2 kW
[at 25ÉC (77ÉF)]
If NG, replace crankshaft position sensor (TDC).
SEF620S
SEF697V
TROUBLE DIAGNOSIS FOR ``CRANK POS SEN (TDC)'' (DTC 47)
Crankshaft Position Sensor (TDC) (Cont'd)
EC-148

Governor Cut Circuit
ON BOARD DIAGNOSIS LOGIC
This diagnostic procedure checks whether or not fuel cut is being performed during deceleration.
Signals from the accelerator switch and camshaft position sensor (PUMP) are sent to the ECM. The ECM uses
these signals to control the electric governor operation.
Accelerator switch (F/C)cAccelerator position
ECM
cElectric
governor
Camshaft position sensor (PUMP)cEngine speed
Diagnostic
Trouble Code
No.Malfunction is detected when ....Check Item
(Possible Cause)
48+Accelerator switch circuit is shorted.
+Crankshaft position sensor (PUMP) or ECM is mal-
functioning.+Harness or connectors
[Accelerator switch (F/C) and camshaft position sen-
sor (PUMP) circuits]
+Accelerator switch (F/C)
+Camshaft position sensor (PUMP)
+ECM
DIAGNOSTIC TROUBLE CODE CONFIRMATION
PROCEDURE
Note: If both DTC 48 and 11 or 23 are displayed, perform
TROUBLE DIAGNOSIS FOR DTC 11 or 23 (See EC-69 or
106).
1) Turn ignition switch ``ON''.
2) Select ``DATA MONITOR'' mode with CONSULT.
3) Start engine and run it to 3,000 rpm, then quickly release
accelerator pedal.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine and run it to 3,000 rpm, then quickly release
accelerator pedal.
2) Turn ignition switch ``OFF'', wait at least 5 seconds and
then turn ``ON''.
3) Perform ``Diagnostic Test Mode II (Self-diagnostic
results)''.
TROUBLE DIAGNOSIS FOR ``GOV CUT CIRCUIT'' (DTC 48)
EC-149

DIAGNOSTIC PROCEDURE
INSPECTION START
1) Turn ignition switch ``ON''.
2) Select ``SELF DIAG RESULTS''
mode with CONSULT.
3) Touch ``ERASE''.
--------------------------------------------------------------------------------------------------------------------------------------OR--------------------------------------------------------------------------------------------------------------------------------------
1) Turn ignition switch ``ON''.
2) Erase the diagnostic test mode
II (Self-diagnostic results)
memory.
PERFORM DIAGNOSTIC TROUBLE
CODE CONFIRMATION PROCEDURE.
See previous page.
Is the DTC 48 displayed again?
No
cYe s
Replace ECM.
INSPECTION END
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TROUBLE DIAGNOSIS FOR ``GOV CUT CIRCUIT'' (DTC 48)
Governor Cut Circuit (Cont'd)
EC-150

Glow Control System
SYSTEM DESCRIPTION
Crankshaft position sensor (TDC)cEngine speed
ECMcGlow relaycGlow plugs
Engine coolant temperature sensorcEngine coolant temperaturecGlow lamp
When engine coolant temperature is more than 90ÉC (194ÉF), the glow relay turns off, inactivating the quick-
glow control until coolant temperature drops below 70ÉC (158ÉF).
When coolant temperature is lower than 90ÉC (194ÉF):
+Ignition switch ON
After ignition switch has turned to ON, the glow relay turns ON for a certain period of time in relation to
engine coolant temperature, allowing current to ¯ow through glow plug.
+Cranking
The glow relay turns ON, allowing current to ¯ow through glow plug.
+Starting
After engine has started, current continues to ¯ow through glow plug (after-glow mode) for a certain period
in relation to engine coolant temperature.
When engine speed exceeds 2,400 rpm, current ¯ow through glow plug is interrupted.
The glow lamp turns ON for a certain period of time in relation to engine coolant temperature at the time glow
relay is turned ON.
COMPONENT DESCRIPTION
Glow plug
The glow plug is provided with a ceramic heating element to obtain
a high-temperature resistance. It glows in response to a signal sent
from the ECM, allowing current to ¯ow through the glow plug via the
glow relay.
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)
16 L/W Glow lampIgnition switch ``ON''
Glow lamp is ``ON''.0 - 1.5V
Ignition switch ``ON''
Glow lamp is ``OFF''.BATTERY VOLTAGE
(11 - 14V)
111 LG/B Glow relay Refer to ``SYSTEM DESCRIPTION''.
SEF857S
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
EC-151

TEC441
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
Glow Control System (Cont'd)
EC-152

DIAGNOSTIC PROCEDURE
INSPECTION START
Check fuel level, fuel supplying system,
starter motor, etc.
OK
cNG
Correct.
Check that all glow plug connecting plate
nuts are installed properly.
OK
cNG
Install properly.
CHECK OVERALL FUNCTION.
Check entire glow control system. (Refer
to ``System Operation Check'' on next
page.)
NG
cOK
CHECK COMPONENT
(Glow plug).
See page EC-155.
CHECK VOLTAGE BETWEEN GLOW
RELAY AND GROUND.
1. Turn ignition switch ``OFF''.
2. Disconnect glow relay.
3. Check voltage between terminals
V1,
V3and ground with CONSULT or
tester.
Voltage: Battery voltage
OK
cNG
Check the following.
+100A fusible link
+Harness for open or
short between glow
relay and battery
If NG, repair harness or
connectors.
CHECK OUTPUT SIGNAL CIRCUIT.
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM
terminal
111and terminalV2.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Check the following.
+Harness connectors
E127,M21
+Harness connectors
M51,F6
+Harness for open or
short between glow
relay and ECM
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK HARNESS CONTINUITY
BETWEEN GLOW RELAY AND GLOW
PLUG.
1. Disconnect glow plug harness connec-
tor.
2. Check harness continuity between glow
relay terminal
V5and glow plug har-
ness connector.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Check the following.
+Harness connectors
E65,E204
+Harness for open or
short between glow
relay and glow plug
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
jA
SEF698V
SEF699V
SEF777V
SEF778V
SEF779V
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TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
Glow Control System (Cont'd)
EC-153