Nissan Terrano r20e. Instruction — part 197
Main 12 Causes of Overheating
Engine
Step
Inspection item
Equipment
Condition
Reference page
OFF
1
I
Blocked radiator
I
Blocked radiator grille
I
Blocked bumper
I
Visual
No blocking
—
2
I
Coolant mixture
I
Coolant tester
50 - 50% coolant mixture
See MA section, “RECOM-
MENDED FLUIDS AND
LUBRICANTS”.
3
I
Coolant level
I
Visual
Coolant up to MAX level in
reservoir tank and radiator
filler neck
See LC section, “Changing
Engine Coolant”.
4
I
Radiator cap
I
Pressure tester
78 - 98 kPa (0.78 - 0.98
bar, 0.8 - 1.0 kg/cm
2, 11 - 14
psi)
See LC section, “System
Check”.
ON*
2
5
I
Coolant leaks
I
Visual
No leaks
See LC section, “System
Check”.
ON*
2
6
I
Thermostat
I
Touch the upper and
lower radiator hoses
Both hoses should be hot
See LC section, “Thermo-
stat” and “Radiator”.
ON*
1
7
I
Cooling fan
I
CONSULT-II
Operating
See Trouble Diagnosis for
DTC P1217, EC-418.
OFF
8
I
Combustion gas leak
I
Color checker chemical
tester 4 Gas analyzer
Negative
—
ON*
3
9
I
Coolant temperature
gauge
I
Visual
Gauge less than 3/4 when
driving
—
I
Coolant overflow to res-
ervoir tank
I
Visual
No overflow during driving
and idling
See LC section, “Changing
Engine Coolant”.
OFF*
4
10
I
Coolant return from res-
ervoir tank to radiator
I
Visual
Should be initial level in
reservoir tank
See LC section, “REFILL-
ING ENGINE COOLANT”.
OFF
11
I
Cylinder head
I
Straight gauge feeler
gauge
0.1 mm (0.004 in) Maxi-
mum distortion (warping)
See EM section, “Inspec-
tion”.
12
I
Cylinder block and pis-
tons
I
Visual
No scuffing on cylinder
walls or piston
See EM section, “Inspec-
tion”.
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to LC section, “OVERHEATING CAUSE ANALYSIS”.
DTC P1217 OVER HEAT
TD27Ti
EC-425
Component Inspection
COOLING FAN RELAY AND A/C RELAY
1. Turn ignition switch OFF.
2. Disconnect cooling fan relay and A/C relay.
3. Check continuity between each relay terminal
q
3
and
q
5
under
the following conditions.
Apply 12V direct current between
relay terminals
q
1
and
q
2
.
Continuity should exist.
No voltage applied.
Continuity should not exist.
4. If NG, replace cooling fan relay or/and A/C relay(s).
MEC942D
DTC P1217 OVER HEAT
TD27Ti
EC-426
Component Description
NEEDLE LIFT SENSOR (NLS)
The needle lift sensor is built into the No. 1 nozzle. Its inductive
pickup element senses fuel injection timing. It is sent as a pulse
signal to the ECM for feed-back the actual fuel injection timing and
calculating the secondary engine speed.
On Board Diagnosis Logic
DTC
Malfunction is detected when .
Check Items
(Possible Cause)
P1240
0304
I
An incorrect signal from the sensor is sent to ECM.
I
Harness or connectors
(The sensor circuit is open or short-circuited.)
I
Needle lift sensor
P1242
0906
DTC Confirmation Procedure
NOTE:
Before DTC confirmation, be sure to check battery voltage is
above 9V.
WITH CONSULT-II
1) Turn ignition switch to “ON” position and select “DATA MONI-
TOR” mode with CONSULT-II.
2) Start engine.
3) Run it for 2 seconds at above 1,200 rpm.
WITHOUT CONSULT-II
1) Start engine.
2) Run it for 2 seconds at above 1,200 rpm.
3) Turn ignition switch to “LOCK” position, wait at least 5 seconds
and then turn to “ON” position.
4) Perform “Diagnostic Test Mode II” (Self-diagnostic results).
NEF689
DTC P1240 NEEDLE LIFT SEN, DTC P1242 NEEDLE LIFT SE
(RPM)
TD27Ti
EC-427
Wiring Diagram
YEC157A
DTC P1240 NEEDLE LIFT SEN, DTC P1242 NEEDLE LIFT SE
(RPM)
TD27Ti
EC-428
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