Nissan Terrano r20e. Manual — part 189
Diagnostic Procedure
INSPECTION START
Check fuel level, fuel supply system,
starter motor, etc.
OK
E
NG
Correct.
Check that all glow plug connecting plate
nuts are installed correctly.
OK
E
NG
Install correctly.
CHECK OVERALL FUNCTION.
Check entire glow control system.
NG
E
OK
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 terminal
q
5
and engine ground
with tester.
Voltage: Battery voltage
OK
E
NG
Check the following:
I
80A fusible link in fusible
link box
I
Harness 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 “ON” position.
2. Check voltage between glow relay con-
nector terminals
q
2
and engine ground
with tester.
Voltage: Battery voltage
OK
E
NG
Check the following:
I
20A fusible link in fusible
link box
I
ECM relay
I
Harness 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 “LOCK” position.
2. Disconnect ECM harness connector.
3. Check harness continuity between
ECM connector terminal
214
and
glow relay connector terminal
q
1
. Refer
to wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
E
NG
Check the following.
I
Harness connectors
M787
,
F66
(LHD mod-
els)
I
Harness 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 terminal
q
3
and glow
plug connector terminal
q
1
. Refer to
wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
E
NG
Check the following.
I
Harness connectors
M740
,
E142
I
Harness continuity
between glow relay and
glow plug
If NG, repair harness or
connectors.
q
A
NEF504
MEC950D
MEC951D
H
H
H
H
H
H
H
H
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMP
TD27Ti
EC-393
q
A
CHECK VOLTAGE BETWEEN COMBI-
NATION METER (GLOW INDICATOR)
AND GROUND.
1. Turn ignition switch “OFF”.
2. Disconnect combination meter harness
connector.
3. Check voltage between combination
meter terminal
q
28
and ground.
Voltage: Battery voltage
OK
E
NG
Check the following.
I
10A fuse
I
Harness 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 “COMPONENT INSPECTION”,
EC-396.
OK
E
NG
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 LAMP
TD27Ti
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 “ON” position.
b. Read voltage and time.
Battery voltage will continuously appear for about 20*
seconds after ignition switch is turned “ON”.
* Engine coolant temperature is higher than 20°C
(68°F).
* Repeatedly turning the ignition switch to “ON” posi-
tion and then back to “LOCK” position may change
the glow time.
2. Intermediate-glow control
a. Turn ignition switch to “LOCK” position. Wait at least 5 seconds.
b. Turn ignition switch to “ON”.
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 50°C
(122°F).
NEF506
NEF726
NEF727
NEF728
DTC P0380 GLOW RELAY, DTC P0381 GLOW LAMP
TD27Ti
EC-395
Component Inspection
GLOW RELAY
1. Check relay terminals
q
1
and
q
2
for coil continuity.
Continuity should exist.
2. Check relay operation by applying battery voltage across relay
coil terminals.
Coil voltage at relay terminals
q
1
and
q
2
Continuity at relay terminals
q
5
and
q
3
0V
No
12V
Yes
GLOW PLUG
1. Remove glow plug connecting plate.
2. Check each glow plug for continuity.
Continuity should exist:
Approximately 0.5
Ω
[at 25°C (77°F)]
I
If NG, replace glow plug.
3. Install glow plug connecting plate securely.
I
Do 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.]
I
If glow plug installation hole is contaminated with carbon,
remove using a reamer or suitable tool.
I
Hand-tighten glow plug by turning it 2 to 3 times, then
tighten using a tool to specified torque.
: 15 - 20 N
⋅
m (1.5 - 2.0 kg-m, 11 - 14 ft-lb)
GLOW INDICATOR
1. Turn ignition switch “OFF”.
2. Disconnect combination meter harness connector.
3. Check continuity between terminals below.
Combination meter
(Glow indicator)
CONDITION 1
+28
Continuity should not
exist.
−47
CONDITION 2
−28
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 LAMP
TD27Ti
EC-396
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