engine NISSAN PICK-UP 1998 Owners Manual

TERMINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC voltage)
22
30WCamshaft position
sensor (REF)
(180É signal)Engine is running.
(Warm-up condition)
Idle speedApproximately 0.4V
SEF064U
Engine is running.(Warm-up condition)
Engine speed is 2,000 rpm.Approximately 0.4V
SEF065U
24 R/WMalfunction indi-
cator lampIgnition switch ``ON''
Approximately 1.5V
Engine is running.
Idle speedBATTERY VOLTAGE
(11 - 14V)
26 Y/LIntake air tem-
perature sensorEngine is running.
Approximately 0 - 4.8V
Output voltage varies with
intake air temperature.
31
40BCamshaft position
sensor (POS)
(1É signal)Engine is running.
(Warm-up condition)
Idle speedApproximately 2.5V
SEF066U
Engine is running.(Warm-up condition)
Engine speed is 2,000 rpm.Approximately 2.5V
SEF067U
TROUBLE DIAGNOSIS Ð General DescriptionKA
ECM Terminals and Reference Value
(Cont'd)
EC-71

TERMINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC voltage)
32 W/LVehicle speed
sensorIgnition switch ``ON''
Jack up all wheels and run engine at idle in
1st position.Varies from 0 to 5V
SEF068U
34 B/Y Start signalIgnition switch ``ON''
Approximately 0V
Ignition switch ``START''
BATTERY VOLTAGE
(11 - 14V)
35 L/BNeutral position
switchIgnition switch ``ON''
Neutral position0V
Ignition switch ``ON''
Except the above gear positionApproximately 5V
36 B/L Ignition switchIgnition switch ``OFF''
0V
Ignition switch ``ON''
BATTERY VOLTAGE
(11 - 14V)
37 PUThrottle position
sensor power sup-
plyIgnition switch ``ON''
Approximately 5V
38
47B/WPower supply for
ECMIgnition switch ``ON''
BATTERY VOLTAGE
(11 - 14V)
39 B ECCS groundEngine is running.
Idle speedEngine ground
41 YAir conditioner
switchEngine is running.
Both air conditioner switch and blower fan
switch are ``ON''. (Compressor operates.)Approximately 0V
Engine is running.
Air conditioner switch is ``OFF''.BATTERY VOLTAGE
(11 - 14V)
43 GPower steering oil
pressure switchEngine is running.
Steering wheel is being turned.0V
Engine is running.
Steering wheel is not being turned.Approximately 5V
46 GY/LPower supply
(Back-up)Ignition switch ``OFF''
BATTERY VOLTAGE
(11 - 14V)
48 B ECCS groundEngine is running.
Idle speedEngine ground
TROUBLE DIAGNOSIS Ð General DescriptionKA
ECM Terminals and Reference Value
(Cont'd)
EC-72

TERMINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC voltage)
101
103
110
112W/B
W/R
W/L
W/GInjector No. 1
Injector No. 3
Injector No. 2
Injector No. 4Engine is running.
(Warm-up condition)
Idle speedBATTERY VOLTAGE
(11 - 14V)
SEF069U
Engine is running.
Engine speed is 2,000 rpm.BATTERY VOLTAGE
(11 - 14V)
SEF070U
104 W/R Fuel pump relayIgnition switch ``ON''
For 5 seconds after turning ignition switch
``ON''
Engine is running.Approximately 1V
Ignition switch ``ON''
5 seconds after turning ignition switch ``ON''BATTERY VOLTAGE
(11 - 14V)
105 W/LEVAP canister
purge control
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
107
108B/P ECCS groundEngine is running.
Idle speedEngine ground
109 B/W Current returnEngine is running.
Idle speedBATTERY VOLTAGE
(11 - 14V)
113 W/G IACV-AAC valveEngine is running.
Idle speed10 - 13V
Engine is running.
Steering wheel is being turned.Air conditioner is operating.Rear window defogger switch is ``ON''.Lighting switch is ``ON''.5 - 10V
114 RHeated oxygen
sensor heaterEngine is running.
Engine speed is below 3,200 rpm.Approximately 0V
Engine is running.
Engine speed is above 3,200 rpm.BATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS Ð General DescriptionKA
ECM Terminals and Reference Value
(Cont'd)
EC-73

TERMINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC voltage)
116 B/P ECCS groundEngine is running.
Idle speedEngine ground
TROUBLE DIAGNOSIS Ð General DescriptionKA
ECM Terminals and Reference Value
(Cont'd)
EC-74

Main Power Supply and Ground Circuit
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)
4 L/R ECCS relay (Self-shutoff)Engine is running.
Ignition switch ``OFF''
For a few seconds after turning ignition switch
``OFF''0-1V
Ignition switch ``OFF''
A few seconds passed after turning ignition
switch ``OFF''BATTERY VOLTAGE
(11 - 14V)
36 B/L Ignition switchIgnition switch ``OFF''
0V
Ignition switch ``ON''
BATTERY VOLTAGE
(11 - 14V)
38
47B/W Power supply for ECM Ignition switch ``ON''
BATTERY VOLTAGE
(11 - 14V)
46 GY/L Power supply (Back-up) Ignition switch ``OFF''
BATTERY VOLTAGE
(11 - 14V)
109 B/W Current returnEngine is running.
Idle speedBATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS FOR POWER SUPPLYKA
EC-75

INSPECTION START
Start engine.
Is engine running?
Yes
cNo
CHECK POWER SUPPLY-I.
1. Turn ignition switch ``ON''.
2. Check voltage between
ECM terminal
V36and
ground with CONSULT or
tester.
Voltage: Battery voltage
If NG, check the following.
lHarness connectorsF55,M47(RHD models)
lHarness for open or short
between ECM and ignition
switch
If NG, repair harness or con-
nectors.
OK
Go to ``CHECK GROUND
CIRCUIT'' on next page.
CHECK POWER SUPPLY-II.
1. Stop engine.
2. Check voltage between ECM termi-
nal
V46and ground with CONSULT
or tester.
Voltage: Battery voltage
OK
cNG
Check the following.
lHarness connectorsF54,M48(RHD models)
lHarness connectorsM5,E101
l10A fuse
lHarness for open or short
between ECM and battery
If NG, repair harness or con-
nectors.
CHECK POWER SUPPLY-III.
1. Turn ignition switch ``ON'' and then
turn ``OFF''.
2. Check voltage between ECM termi-
nals
V38,V47,109and ground with
CONSULT or tester.
Voltage:
After turning ignition switch
``OFF'', battery voltage will exist
for a few seconds, then drop to
approximately 0V.
NG
cOK
Go to ``CHECK GROUND
CIRCUIT'' on next page.
Case-1: Battery voltage does
not exist.
Case-2: Battery voltage exists
for more than a few
seconds.
Case-1
cCase-2
Go to ``CHECK ECCS
RELAY'' on next page.
VA
SEF119U
SEF120U
SEF071U
SEF121U
.
.
.
.
.
TROUBLE DIAGNOSIS FOR POWER SUPPLYKA
Main Power Supply and Ground Circuit
(Cont'd)
EC-80

VA
CHECK HARNESS CONTINUITY BETWEEN
ECCS RELAY AND ECM.
1. Disconnect ECM harness connector.
2. Disconnect ECCS relay.
3. Check harness continuity between ECM ter-
minals
V38,V47,109and terminalV5.
Continuity should exist.
If OK, check harness for short to ground and
short to power.
OK
cNG
Check the following.
lHarness connectorsF54,M48(RHD models)lHarness connectorsM5,E101lHarness for open or short
between ECM and ECCS
relay
If NG, repair open circuit,
short to ground or short to
power in harness or connec-
tors.
CHECK VOLTAGE BETWEEN ECCS RELAY
AND GROUND.
Check voltage between terminals
V1,V3and
ground with CONSULT or tester.
Voltage: Battery voltage
OK
cNG
Check the following.
lHarness for open or short
between ECCS relay and
fuse
If NG, repair harness or con-
nectors.
CHECK OUTPUT SIGNAL CIRCUIT.
Check harness continuity between ECM termi-
nal
V4and relay terminalV2.
Continuity should exist.
If OK, check harness for short to ground and
short to power.
OK
cNG
Check the following.
lHarness connectorsF54,M48(RHD models)lHarness connectorsM5,E101lHarness for open or short
between ECM and ECCS
relay
If NG, repair open circuit,
short to ground or short to
power in harness or connec-
tors.
CHECK ECCS RELAY.
1. Apply 12V direct current between relay ter-
minals
V1andV2.
2. Check continuity between relay terminals
V3andV5.
12V (
V1-V2) applied:
Continuity exists.
No voltage applied:
No continuity
OK
cNG
Replace ECCS relay.
CHECK GROUND CIRCUIT.
1. Turn ignition switch ``OFF''.
2. Loosen and retighten engine ground screws.
3. Disconnect ECM harness connector.
4. Check harness continuity between ECM ter-
minals
V6,V13,V39,V48,107,108,116and engine ground.
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 connectors.
Check ECM pin terminals for damage and
check the connection of ECM harness connec-
tor.
INSPECTION END
SEF072U
SEF073U
SEF074U
SEF090M
SEF075U
.
.
.
.
.
.
.
TROUBLE DIAGNOSIS FOR POWER SUPPLYKA
Main Power Supply and Ground Circuit
(Cont'd)
EC-81

Camshaft Position Sensor (CMPS)
COMPONENT DESCRIPTION
The camshaft position sensor is a basic component of the ECCS.
It monitors engine speed and piston position. These input signals
to the ECM are used to control fuel injection, ignition timing and
other functions.
The camshaft position sensor has a rotor plate and a wave-
forming circuit. The rotor plate has 360 slits for a 1É signal and
4 slits for a 180É signal. The wave-forming circuit consists of
Light Emitting Diodes (LED) and photo diodes.
The rotor plate is positioned between the LED and the photo
diode. The LED transmits light to the photo diode. As the rotor
plate turns, the slits cut the light to generate rough-shaped
pulses. These pulses are converted into on-off signals by the
wave-forming circuit and sent to the ECM.
The distributor is not repairable and must be replaced as an
assembly, except distributor cap.
SEF998R
SEF853B
TROUBLE DIAGNOSIS FOR ``CAMSHAFT POSI SEN'' (DTC 11)KA
EC-82

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)
22
30W
WCamshaft position sensor
(REF) (180É signal)Engine is running.
(Warm-up condition)
Idle speedApproximately 0.4V
SEF064U
Engine is running.(Warm-up condition)
Engine speed is 2,000 rpm.Approximately 0.4V
SEF065U
31
40B
BCamshaft position sensor
(POS) (1É signal)Engine is running.
(Warm-up condition)
Idle speedApproximately 2.5V
SEF066U
Engine is running.(Warm-up condition)
Engine speed is 2,000 rpm.Approximately 2.5V
SEF067U
ON BOARD DIAGNOSIS LOGIC
Diagnostic
Trouble Code
No.Malfunction is detected when ....Check Items
(Possible Cause)
TROUBLE DIAGNOSIS FOR ``CAMSHAFT POSI SEN'' (DTC 11)KA
Camshaft Position Sensor (CMPS) (Cont'd)
EC-83

11lEither 1É or 180É signal is not sent to ECM for the first
few seconds during engine cranking.
.......................................................................................lHarness or connectors
(The camshaft position sensor circuit is open or
shorted.)
lCamshaft position sensorlStarter motor (Refer to EL section.)lStarting system circuit (Refer to EL section.)lDead (Weak) battery
lEither 1É or 180É signal is not sent to ECM during
engine running.
.......................................................................................
lEither 1É or 180É signal is not in the normal pattern
during engine running.
DIAGNOSTIC TROUBLE CODE CONFIRMATION
PROCEDURE
Before performing the following procedure, confirm that
battery voltage is more than 10V.
1) Turn ignition switch ``ON'' and select ``DATA MONI-
TOR'' mode with CONSULT.
2) Start engine and run it for at least 2 seconds at idle
speed.
(If engine does not run, turn ignition switch to ``START''
for at least 2 seconds.)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine and run it for at least 2 seconds at idle
speed.
(If engine does not run, turn ignition switch to ``START''
for at least 2 seconds.)
2) Turn ignition switch ``OFF'', wait at least 5 seconds and
then turn ``ON''.
3) Perform ``Diagnostic Test Mode II (Self-diagnostic
results)'' with ECM.
SEF051U
TROUBLE DIAGNOSIS FOR ``CAMSHAFT POSI SEN'' (DTC 11)KA
Camshaft Position Sensor (CMPS) (Cont'd)
EC-84