1998 NISSAN PICK-UP Repair Manual

HEC562
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMSKA
Neutral Position Switch (Cont'd)
EC-137

DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK OVERALL FUNCTION.
1. Turn ignition switch ``ON''.
2. Perform ``PARK/NEUT POSI
SW CKT'' in ``FUNCTION
TEST'' mode with CONSULT.
----------------------------------------------------------------------------------------------------------------------------------OR----------------------------------------------------------------------------------------------------------------------------------
2. Select ``P/N POSI SW'' in
``DATA MONITOR'' mode with
CONSULT.
3. Check the ``P/N POSI SW'' sig-
nal under the following condi-
tions.
Neutral position: ON
Except above position: OFF
----------------------------------------------------------------------------------------------------------------------------------OR----------------------------------------------------------------------------------------------------------------------------------
2. Check voltage between ECM
terminal
V35and ground with
CONSULT or tester under the
following conditions.
Voltage:
Neutral position
Approximately 0V
Except above position
Approximately 5V
NG
cOK
INSPECTION END
CHECK GROUND CIRCUIT.
1. Disconnect neutral position switch har-
ness connector.
2. Check harness continuity between ter-
minal
V2and body ground.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Check the following.
lHarness connectors
E204,E29
lHarness for open or
short between neutral
position switch and body
ground
If NG, repair open circuit,
short to ground or short to
power in harness or con-
nectors.
VA
SEF098U
SEF165U
SEF963N
SEF166U
SEF162S
.
.
.
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMSKA
Neutral Position Switch (Cont'd)
EC-138

VA
CHECK INPUT SIGNAL CIRCUIT.
1. Disconnect ECM harness connector.
2. Check harness continuity between
ECM terminal
V35and terminalV1.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Check the following.
lHarness connectors
E205,E33
lHarness connectors
E101,M5
lHarness connectors
M48,F54(RHD mod-
els)
lHarness for open or
short between ECM and
neutral position switch
If NG, repair open circuit,
short to ground or short to
power in harness or con-
nectors.
CHECK COMPONENT
(Neutral position switch).
Refer to MT section.
OK
cNG
Replace neutral position
switch.
Disconnect and reconnect harness con-
nectors in the circuit. Then retest.
Trouble is not fixed.
Check ECM pin terminals for damage
and check the connection of ECM har-
ness connector. Reconnect ECM harness
connector and retest.
INSPECTION END
SEF099U
.
.
.
.
.
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMSKA
Neutral Position Switch (Cont'd)
EC-139

EVAP Canister Purge Control Solenoid Valve
COMPONENT DESCRIPTION
EVAP canister purge control solenoid valve
The EVAP canister purge control solenoid valve responds to
signals from the ECM. When the ECM sends an OFF signal, the
vacuum signal (from the throttle body to the EVAP canister purge
control valve) passes through the EVAP canister purge control
solenoid valve. The signal then reaches the EVAP canister purge
control valve.
When the ECM sends an ON (ground) signal, the vacuum sig-
nal is cut.
CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
EGRC SOL/V
lEngine: After warning uplAir conditioner switch: ``OFF''lShift lever: Neutral positionlNo-loadIdle OFF
Above 3,800 rpm ON
ECM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values, and are measured between each terminal andV39(ECCS ground) with a voltme-
ter.
TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC voltage)
105 W/LEVAP canister purge con-
trol solenoid valveEngine is running.
(Warm-up condition)
Idle speedBATTERY VOLTAGE
(11 - 14V)
Engine is running.
(Warm-up condition)
Engine is above 3,800 rpm.Approximately 1V
SEF302R
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMSKA
EC-140

HEC358
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMSKA
EVAP Canister Purge Control Solenoid Valve
(Cont'd)
EC-141

DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK OVERALL FUNCTION.
1. Perform diagnostic test mode II (Self-
diagnostic results).
Make sure that diagnostic trouble code
No. 55 is displayed.
2. Start engine and warm it up suffi-
ciently.
3. Disconnect vacuum hose to EVAP can-
ister.
4. Make sure that vacuum exists under
the following conditions.
Revving engine below 3,800 rpm:
Vacuum should exist.
Above 3,800 rpm:
Vacuum should not exist.
NG
cOK
CHECK COMPONENT
(EVAP canister).
Refer to ``EVAP
CANISTER'', EC-19.
If NG, replace EVAP can-
ister.
OK
INSPECTION END
CHECK SOLENOID VALVE OPERA-
TION.
Does EVAP canister purge control sole-
noid valve make an operation sound in
OVERALL FUNCTION CHECK above?
No
cYes
CHECK VACUUM HOSE.
Check vacuum hose for
clogging, cracks and
improper connection.
Refer to ``Vacuum Hose
Drawing'', EC-12.
CHECK POWER SUPPLY.
1. Turn ignition switch ``OFF''.
2. Disconnect EVAP canister purge con-
trol solenoid valve harness connector.
3. Turn ignition switch ``ON''.
4. Check voltage between terminal
V1
and engine ground with CONSULT or
tester.
Voltage: Battery voltage
OK
cNG
Check the following.
lHarness connectors
F54,M48(RHD mod-
els)
l10A fuse
lHarness for open or
short between EVAP
canister purge control
solenoid valve and fuse
If NG, repair harness or
connectors.
CHECK OUTPUT SIGNAL CIRCUIT.
1. Turn ignition switch ``OFF''.
2. Disconnect ECM harness connector.
3. Check harness continuity between
ECM terminal
105and terminalV2.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Repair open circuit, short
to ground or short to
power in harness or con-
nectors.
VA
SEF162U
SEF100U
SEF101U
.
.
.
.
.
.
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMSKA
EVAP Canister Purge Control Solenoid Valve
(Cont'd)
EC-142

VA
CHECK COMPONENT.
(EVAP canister purge control solenoid
valve).
Refer to ``COMPONENT INSPECTION'',
below.
OK
cNG
Replace EVAP canister
purge control solenoid
valve.
Disconnect and reconnect harness con-
nectors in the circuit. Then retest.
Trouble is not fixed.
Check ECM pin terminals for damage
and check the connection of ECM har-
ness connector. Reconnect ECM harness
connector and retest.
INSPECTION END
COMPONENT INSPECTION
EVAP canister purge control solenoid valve
Check air passage continuity.
ConditionAir passage
continuity
between
VAandVB
Air passage
continuity
between
VAandVC
12V direct current supply
between terminalsYes No
No supply No Yes
If NG, replace solenoid valve.
SEF313Q
.
.
.
.
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMSKA
EVAP Canister Purge Control Solenoid Valve
(Cont'd)
EC-143

Injector
LHD MODELS
HEC351
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMSKA
EC-144