NISSAN TERRANO 2002 Service Repair Manual

System Description
GLOW CONTROL
Engine coolant temperature sensorEEngine coolant temperature
ECMEGlow relayEGlow plugs
Ignition switchEStart signalEGlow lamp
IPre-glow
When the ignition switch is turned on the ON position, the glow
indicator lamp will turn ON and pre-glow starts.
The glow relay is turned ON continuously. The ON time of both
the glow indicator lamp and the glow relay is determined by the
engine coolant temperature. Pre-glow ends when the pre-glow
time elapses or when the engine is started.
IIntermediate glow
Intermediate glow starts when the pre-glow time has elapsed
and the engine has not been started. The glow relay is turned
ON intermittently. Intermediate glow ends when the intermedi-
ate glow time has elapsed, or when the engine is started.
IAfter-glow
After-glow starts as soon as the engine is running and the
engine coolant temperature is below 50ÉC (122ÉF). The glow
relay is turned on continuously. After-glow ends when the after-
glow time elapses, or when the engine coolant temperature
exceeds 50ÉC (122ÉF).
MEC972D
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMPTD27Ti
EC-389

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 flow through the glow plug via the
glow relay.
On Board Diagnosis Logic
DTC Malfunction is detected when ....Check Items
(Possible cause)
P0380
0803IGlow relay signal circuit is open or shorted.IHarness or connectors
(The glow relay signal circuit is open or shorted.)
IGlow relay
P0381
0908IGlow indicator lamp circuit is open or shorted.IHarness or connectors
(The glow indicator lamp circuit is open or shorted.)
IGlow lamp
DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch ªONº position.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Wait for at least 5 seconds.
WITHOUT CONSULT-II
1) Turn ignition switch ªONº position and then wait for at least 5
seconds.
2) Turn ignition switch OFF, wait for at least 5 seconds and then
turn on.
3) Perform ªDiagnostic Test Mode IIº (Self-diagnostic results).
SEF857S
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMPTD27Ti
EC-390

Wiring Diagram
LHD MODELS
YEC151A
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMPTD27Ti
EC-391

RHD MODELS
YEC152A
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMPTD27Ti
Wiring Diagram (Cont'd)
EC-392

Diagnostic Procedure
INSPECTION START
Check fuel level, fuel supply system,
starter motor, etc.
OK
ENG
Correct.
Check that all glow plug connecting plate
nuts are installed correctly.
OK
ENG
Install correctly.
CHECK OVERALL FUNCTION.
Check entire glow control system.
NG
EOK
CHECK COMPONENT
(Glow plug).
Refer to EC-396.
CHECK VOLTAGE BETWEEN GLOW
RELAY AND GROUND.
1. Disconnect glow relay.
2. Check voltage between glow relay con-
nector terminalq
5and engine ground
with tester.
Voltage: Battery voltage
OK
ENG
Check the following:
I80A fusible link in fusible
link box
IHarness continuity
between glow relay and
battery positive terminal.
If NG, replace fuse or fus-
ible link or repair harness
or connectors.
CHECK VOLTAGE BETWEEN GLOW
RELAY AND GROUND.
1. Turn ignition switch to ªONº position.
2. Check voltage between glow relay con-
nector terminalsq
2and engine ground
with tester.
Voltage: Battery voltage
OK
ENG
Check the following:
I20A fusible link in fusible
link box
IECM relay
IHarness continuity
between glow relay and
battery positive terminal.
If NG, replace fuse or fus-
ible link or repair harness
or connectors.
CHECK OUTPUT SIGNAL CIRCUIT.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect ECM harness connector.
3. Check harness continuity between
ECM connector terminal
214and
glow relay connector terminalq
1. Refer
to wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
ENG
Check the following.
IHarness connectors
M787,F66(LHD mod-
els)
IHarness continuity
between glow relay and
ECM
If NG, repair harness or
connectors.
CHECK HARNESS CONTINUITY
BETWEEN GLOW RELAY AND GLOW
PLUG.
1. Disconnect glow plug connector.
2. Check harness continuity between glow
relay connector terminalq
3and glow
plug connector terminalq
1. Refer to
wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
ENG
Check the following.
IHarness connectors
M740,E142
IHarness continuity
between glow relay and
glow plug
If NG, repair harness or
connectors.
qA
NEF504
MEC950D
MEC951D
H
H
H
H
H
H
H
H
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMPTD27Ti
EC-393

qA
CHECK VOLTAGE BETWEEN COMBI-
NATION METER (GLOW INDICATOR)
AND GROUND.
1. Turn ignition switch ªOFFº.
2. Disconnect combination meter harness
connector.
3. Check voltage between combination
meter terminalq
28and ground.
Voltage: Battery voltage
OK
ENG
Check the following.
I10A fuse
IHarness continuity
between combination
meter and 10A fuse
If NG, replace fuse or
repair harness or connec-
tors.
CHECK COMPONENTS.
(Glow relay, Glow plug, Glow indicator).
Refer to ªCOMPONENT INSPECTIONº,
EC-396.
OK
ENG
Replace malfunctioning
component(s).
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 harness
connector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
YEC257A
H
H
H
H
H
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMPTD27Ti
Diagnostic Procedure (Cont'd)
EC-394

System Operation Check
Set voltmeter between glow plug and engine body.
1. Pre-glow control
a. Turn ignition switch to ªONº position.
b. Read voltage and time.
Battery voltage will continuously appear for about 20*
seconds after ignition switch is turned ªONº.
* Engine coolant temperature is higher than 20ÉC
(68ÉF).
* Repeatedly turning the ignition switch to ªONº posi-
tion and then back to ªLOCKº position may change
the glow time.
2. Intermediate-glow control
a. Turn ignition switch to ªLOCKº position. Wait at least 5 seconds.
b. Turn ignition switch to ªONº.
c. Read voltage.
Battery voltage will intermittently appear for about 60
seconds after pre-glow control time has elapsed.
3. After-glow control
Start engine and read voltage and time.
Battery voltage will appear for max. 10 minutes.
When engine coolant temperature is lower than 50ÉC
(122ÉF).
NEF506
NEF726
NEF727
NEF728
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMPTD27Ti
EC-395

Component Inspection
GLOW RELAY
1. Check relay terminalsq1andq2for coil continuity.
Continuity should exist.
2. Check relay operation by applying battery voltage across relay
coil terminals.
Coil voltage at relay terminals
q
1andq2
Continuity at relay terminals
q
5andq3
0V No
12V Yes
GLOW PLUG
1. Remove glow plug connecting plate.
2. Check each glow plug for continuity.
Continuity should exist:
Approximately 0.5W[at 25ÉC (77ÉF)]
IIf NG, replace glow plug.
3. Install glow plug connecting plate securely.
IDo not bump glow plug heating element. If it is bumped,
replace glow plug with new one. [If glow plug is dropped
from a height above 10 cm (3.94 in), replace with new one.]
IIf glow plug installation hole is contaminated with carbon,
remove using a reamer or suitable tool.
IHand-tighten glow plug by turning it 2 to 3 times, then
tighten using a tool to specified torque.
:15-20N×m (1.5 - 2.0 kg-m, 11 - 14 ft-lb)
GLOW INDICATOR
1. Turn ignition switch ªOFFº.
2. Disconnect combination meter harness connector.
3. Check continuity between terminals below.
Combination meter
(Glow indicator)CONDITION 1+28
Continuity should not
exist.
þ47
CONDITION 2þ28
Continuity should
exist.
+47
IF NG, repair or replace combination meter (Glow indicator). Refer
to EL section.
SEC564B
NEF507
SEC565B
YEC258A
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMPTD27Ti
EC-396

Component Description
VEHICLE SPEED SENSOR (VSS)
The vehicle speed sensor is installed in the combination meter. It
contains a pulse generator which provides a vehicle speed signal
to the speedometer. The speedometer then sends a signal to the
ECM.
On Board Diagnosis Logic
DTC Malfunction is detected when ....Check Items
(Possible Cause)
P0500
0104IThe almost 0 km/h (0 mph) signal from vehicle speed
sensor is sent to ECM even when vehicle is being
driven.IHarness or connector
(The vehicle speed sensor circuit is open or short-
circuited.)
IVehicle speed sensor
Overall Function Check
Use this procedure to check the overall function of the vehicle
speed sensor circuit. During this check, a DTC might not be con-
firmed.
WITH CONSULT-II
1) Jack up drive wheels.
2) Start engine.
3) Read vehicle speed sensor signal in ªDATA MONITORº mode
with CONSULT-II.
The vehicle speed on CONSULT-II should be able to exceed 10
km/h (6 mph) when rotating wheels with suitable gear position.
WITHOUT CONSULT-II
1) Jack up drive wheels.
2) Rotate drive wheel by hand.
3) Check voltage between ECM connector terminal
417and body
ground with tester.
Voltage should vary between approx. 0 - Battery voltage.
AEC110
SEF864Y
MEC970D
DTC P0500 VEHICLE SPEED SENTD27Ti
EC-397

Wiring Diagram
YEC147A
DTC P0500 VEHICLE SPEED SENTD27Ti
EC-398