2006 NISSAN PATROL Service Manual

COMPONENT INSPECTION
EGR valve
Apply vacuum to EGR vacuum port with a hand vacuum pump.
EGR valve spring should lift.
If NG, replace EGR valve.
Throttle control valve
Apply vacuum to throttle control valve vacuum port with a hand
vacuum pump.
Throttle control valve should close.
If NG, replace throttle control valve.
EGRC-solenoid valve A, B and throttle control solenoid
valve
Check air passage continuity.
ConditionAir passage
continuity
betweenj
AandjB
Air passage
continuity
betweenj
AandjC
12V direct current supply
between terminals
V1
andV2
Ye s N o
No supply No Yes
If NG, replace solenoid valve(s).
MEF137D
SEF707V
MEC488B
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
EGRC-Solenoid Valve A, B and Throttle Control
Solenoid Valve (Cont'd)
EC-162

Start Signal
TEC443
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
EC-163

DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK OVERALL FUNCTION.
1. Turn ignition switch ``ON''.
2. Check ``START SIGNAL'' in
``DATA MONITOR'' mode with
CONSULT.
--------------------------------------------------------------------------------------------------------------------------------------OR--------------------------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to ``START''.
2. Check voltage between ECM
terminal
V20and ground.
Voltage:
Ignition switch ``START''
Battery voltage
Except above
Approximately 0V
NG
cOK
INSPECTION END
CHECK INPUT SIGNAL CIRCUIT.
1. Turn ignition switch ``OFF''.
2. Disconnect ECM harness connector and
ignition switch harness connector.
3. Check harness continuity between ECM
terminal
V20and terminalV6.
Continuity should exist.
If OK, check harness for short to ground
and short to power.
OK
cNG
Check the following.
+Harness connectors
M52,F7
+7.5A fuse
+Fuse block
M3,E112
+Harness for open or short
between ECM and igni-
tion switch
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
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
IGN ``ON'' OFF
IGN ``START'' ONSEF625S
SEF109P
SEF785V
.
.
.
.
.
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
Start Signal (Cont'd)
EC-164

Accelerator Position Switch
The accelerator position switch detects OFF-accelerator switch sig-
nal and Full-accelerator switch signal and send these signals to the
ECM. The ECM will then determine engine idle conditions. These
signals are also used for diagnosing the accelerator position sen-
sor.
CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Speci®cation data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
FULL ACCEL SW+Ignition switch: ON
(Engine stopped)Accelerator pedal: depressed ON
Except above OFF
OFF ACCEL SW+Ignition switch: ON
(Engine stopped)Accelerator pedal: released ON
Accelerator pedal: slightly open OFF
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)
31 R/LAccelerator position switch
(Idle)Ignition switch ``ON''
Accelerator pedal fully releasedBATTERY VOLTAGE
(11 - 14V)
Ignition switch ``ON''
Accelerator pedal depressedApproximately 0V
32 W/GAccelerator position switch
(Full)Ignition switch ``ON''
Accelerator pedal releasedApproximately 0V
Ignition switch ``ON''
Accelerator pedal fully depressedBATTERY VOLTAGE
(11 - 14V)
SEF708V
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
EC-165

TEC444
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
Accelerator Position Switch (Cont'd)
EC-166

DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK OVERALL FUNCTION.
1. Turn ignition switch ``ON''.
2. Select ``FULL ACCEL SW'' and
``OFF ACCEL SW'' in ``DATA
MONITOR'' mode with CON-
SULT.
3. Check ``FULL ACCEL SW'' and
``OFF ACCEL SW'' signal under
the following conditions.
OFF ACCEL SW:
Accelerator pedal released
ON
Accelerator pedal
depressed OFF
FULL ACCEL SW:
Accelerator pedal released
OFF
Accelerator pedal fully
depressed ON
--------------------------------------------------------------------------------------------------------------------------------------OR--------------------------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch ``ON''.
2. Check voltage between ECM
terminal
V31and ground under
the following conditions.
Voltage:
Accelerator pedal released
Battery voltage
Accelerator pedal
depressed
Approximately 0V
3. Check voltage between ECM
terminal
V32and ground under
the following conditions.
Voltage:
Accelerator pedal released
Approximately 0V
Accelerator pedal fully
depressed
Battery voltage
NG
cOK
INSPECTION END
CHECK POWER SUPPLY.
1. Turn ignition switch ``OFF''.
2. Disconnect accelerator position switch
harness connector.
3. Turn ignition switch ``ON''.
4. Check voltage between terminal
V5
and ground with CONSULT or tester.
Voltage: Battery voltage
OK
cNG
Check the following.
+Harness connectors
M52,F7(LHD mod-
els)
+Harness for open or
short between accelera-
tor position switch and
ECCS relay
+Harness for open or
short between accelera-
tor position switch and
ECM
If NG, repair harness or
connectors.
jA
SEF626S
SEF627S
SEF708V
SEF786V
.
.
.
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
Accelerator Position Switch (Cont'd)
EC-167

jA
CHECK INPUT SIGNAL CIRCUIT-I.
1. Turn ignition switch ``OFF''.
2. Disconnect ECM harness connector.
3. Check harness continuity between ter-
minal
V6and ECM terminalV31.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Check the following.
+Harness connectors
M52,F7(RHD mod-
els)
+Harness for open or
short between ECM and
accelerator position
switch
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK INPUT SIGNAL CIRCUIT-II.
Check harness continuity between termi-
nal
V4and ECM terminalV32.
Continuity should exist.
If OK, check harness for short to ground
and short to power.
OK
cNG
Check the following.
+Harness connectors
M52,F7(RHD mod-
els)
+Harness for open or
short between ECM and
accelerator position
switch
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK COMPONENT
(Accelerator position switch).
Refer to ``COMPONENT INSPECTION''
on next page.
OK
cNG
Replace accelerator pedal
assembly.
Disconnect and reconnect harness con-
nectors in the circuits. Then retest.
Trouble is not ®xed.
Check ECM pin terminals for damage and
check the connection of ECM harness
connector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
SEF787V
SEF788V
.
.
.
.
.
.
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
Accelerator Position Switch (Cont'd)
EC-168

COMPONENT INSPECTION
Accelerator position switch
1. Disconnect accelerator position switch harness connector.
2. Check continuity between terminals
V5andV6.
Conditions Continuity
Accelerator pedal released Yes
Accelerator pedal depressed No
3. Check continuity between terminalsV4andV5.
Conditions Continuity
Accelerator pedal released No
Accelerator pedal fully depressed Yes
If NG, replace accelerator pedal assembly.
CAUTION:
If accelerator position sensor or ECM connector is
disconnected, perform the following procedures:
Select ``OFF ACCEL PO SIG'' in ``ACTIVE TEST'' mode.
Touch CLEAR.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Start and warm up engine. After engine has warmed up,
idle for 10 minutes.
SEF709V
TROUBLE DIAGNOSES FOR NON-DETECTABLE ITEMS
Accelerator Position Switch (Cont'd)
EC-169