Nissan Terrano r20e. Instruction — part 175
Description for Work Flow
STEP
DESCRIPTION
STEP I
Get detailed information about the conditions and the environment when the incident/symptom occurred using the
“DIAGNOSTIC WORKSHEET” as shown on the next page.
STEP II
Before confirming the concern, check and write down (print out using CONSULT-II) the Diagnostic Trouble Code
(DTC), then erase the code. (Refer to EC-321). The DTC can be used when duplicating the incident at STEP III &
IV.
Study the relationship between the cause, specified by DTC, and the symptom described by the customer. (The
“Symptom Matrix Chart” will be useful. Refer to EC-340.)
STEP III
Try to confirm the symptom and under what conditions the incident occurs.
The “DIAGNOSTIC WORK SHEET” is useful to verify the incident. Connect CONSULT-II to the vehicle in DATA
MONITOR (AUTO TRIG) mode and check real time diagnosis results.
If the malfunction code is detected, skip STEP IV and perform STEP V.
STEP IV
Try to detect the Diagnostic Trouble Code (DTC) by driving in (or performing) the “DTC CONFIRMATION PROCE-
DURE”. Check and read the DTC by using CONSULT-II.
During the DTC verification, be sure to connect CONSULT-II to the vehicle in DATA MONITOR (AUTO TRIG) mode
and check real time diagnosis results.
In case the “DTC CONFIRMATION PROCEDURE” is not available, perform the “OVERALL FUNCTION CHECK”
instead. The DTC cannot be displayed by this check, however, this simplified “check” is an effective alternative.
The “NG” result of the “OVERALL FUNCTION CHECK” is the same as the DTC detection.
STEP V
Take the appropriate action based on the results of STEP I through IV.
If the malfunction code is indicated, proceed to TROUBLE DIAGNOSIS FOR DTC.
If the normal code is indicated, proceed to the BASIC INSPECTION. Refer to EC-338. Then perform inspections
according to the Symptom Matrix Chart. Refer to EC-340.
STEP VI
Identify where to begin diagnosis based on the relationship study between symptom and possible causes. Inspect
the system for mechanical binding, loose connectors or wiring damage using (tracing) “Harness Layouts”.
Gently shake the related connectors, components or wiring harness with CONSULT-II set in “DATA MONITOR
(AUTO TRIG)” mode.
Check the voltage of the related ECM terminals or monitor the output data from the related sensors with CON-
SULT-II. Refer to EC-346.
The “DIAGNOSTIC PROCEDURE” in EC section contains a description based on open circuit inspection. A short
circuit inspection is also required for the circuit check in the DIAGNOSTIC PROCEDURE.
Repair or replace the malfunctioning parts.
STEP VII
Once you have repaired the circuit or replaced a component, you need to run the engine in the same conditions
and circumstances which resulted in the customer’s initial complaint.
Perform the “DTC CONFIRMATION PROCEDURE” and confirm the normal code (Diagnostic trouble code No. 55)
is detected. If the incident is still detected in the final check, perform STEP VI by using a different method from the
previous one.
Before returning the vehicle to the customer, be sure to erase the unnecessary (already fixed) DTC in ECM. (Refer
to EC-321.)
TROUBLE DIAGNOSES
TD27Ti
EC-337
Basic Inspection
Precaution:
Perform Basic Inspection without electrical or mechanical
loads applied;
I
Headlamp switch is OFF,
I
Air conditioner switch is OFF,
I
Rear defogger switch is OFF,
I
Steering wheel is in the straight-ahead position, etc.
BEFORE STARTING
1. Check service records for any recent
repairs that may indicate a related
problem, or the current need for
scheduled maintenance.
2. Open engine hood and check the fol-
lowing:
I
Harness connectors for improper con-
nections
I
Vacuum hoses for splits, kinks, or
improper connections
I
Wiring for improper connections,
pinches, or cuts
3.Using priming pump, bleed air from fuel
system. Refer to “Fuel Filter Check” in
MA section.
CONNECT CONSULT-II TO THE
VEHICLE.
Connect “CONSULT-II” to the data link
connector for CONSULT-II and select
“ENGINE” from the menu.
DOES ENGINE START?
Yes
E
No
Turn ignition switch to
“LOCK” position, wait 5
seconds and then start
engine. If engine fails to
start, check diagnostic
trouble code (DTC).
Run engine for 10 minutes.
CHECK IDLE SPEED.
Read engine idle speed in “DATA
MONITOR” mode with CONSULT-II.
725 rpm ± 50 (in N position)
------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------
Check idle speed using tachometer
tester.
725 rpm ± 50 (in N position)
(Go to
q
A
on next page.)
SEF142I
NEF463
YEC237A
NEF464
SEF817Y
H
H
H
H
H
TROUBLE DIAGNOSES
TD27Ti
EC-338
q
A
CHECK INJECTION TIMING.
1. Set No. 1 piston at TDC on its com-
pression stroke.
2. Remove injection tubes and air bleeder
on the back of injection pump.
3. Set dial gauge so its indicator points to
somewhere between 1.0 and 2.0 mm
(0.039 and 0.079 in) on the scale.
4. Turn crankshaft two turns clockwise
and check that dial gauge indicates the
same value again.
5. Turn crankshaft counterclockwise about
100 degrees, then turn crankshaft
clockwise slowly, and set dial gauge
indicator to 0 mm at the position it
stops.
6. Turn crankshaft clockwise and set it at
TDC using the mark on the crankshaft
pulley.
7. Read plunger lift.
Plunger lift:
0.36 ± 0.02 mm (0.0142 ± 0.0008
in) at TDC
I
When repeating the checking, start
with step 5.
NG
E
OK
Bleed air from fuel system.
After this inspection,
unnecessary diagnostic
trouble code No. might be
displayed.
Erase the stored memory
in ECM.
Refer to “HOW TO ERASE
DTC” (EC-321).
OK
INSPECTION END
Adjusting
1. If plunger lift is not within the specified
value, adjust by turning injection pump.
I
If indication is smaller than the
specified value, turn pump body
away from engine.
I
If indication is larger than the speci-
fied value, turn pump body towards
engine.
2. Tighten injection pump securing bolts
and nuts.
Nut:
: 20 - 25 N
⋅
m
(2.0 - 2.5 kg-m, 14 - 18 ft-lb)
Bolt:
: 32 - 42 N
⋅
m
(3.3 - 4.3 kg-m, 24 - 31 ft-lb)
3. Remove dial gauge and install air
bleeder with new washer.
4. Install injection tubes.
Flare nut:
: 20 - 25 N
⋅
m
(2.0 - 2.5 kg-m, 14 - 18 ft-lb)
5. Bleed air from fuel system.
Refer to “DRAINING SYSTEM” of
“ENGINE MAINTENANCE” in MA sec-
tion.
E
Go to
.
NEF468
NEF465
NEF466
EEF160A
H
H
H
TROUBLE DIAGNOSES
TD27Ti
Basic Inspection (Cont’d)
EC-339
Symptom Matrix Chart
SYSTEM
— Basic engine
control system
SYMPTOM
Reference
page
Feature
of
symptom,
Check
point
HARD/NO
ST
AR
T/REST
AR
T
(EXCP
.
HA)
ENGINE
ST
ALL
HESIT
A
TION/SURGING/FLA
T
SPOT
SP
ARK
KNOCK/DET
ONA
TION
LACK
OF
POWER
POOR
ACCELERA
TION
HI
IDLE
LOW
IDLE
ROUGH
IDLE/HUNTING
IDLING
VIBRA
TION
SLOW/NO
RETURN
T
O
IDLE
OVERHEA
T/HIGH
ENGINE
COOLANT
TEMPERA
TURE
EXCESSIVE
FUEL
CONSUMPTION
EXCESSIVE
OIL
CONSUMPTION
ABNORMAL
SMOKE
COLOR
DEAD
BA
TTER
Y
(UNDER
CHARGE)
Malfunction
indicator
lamp
illuminates.
Can
be
detected
by
CONSUL
T
-II?
Fuel
cut
NO
ST
AR
T
(with
first
firing)
NO
ST
AR
T
(without
first
firing)
HARD
T
O
ST
AR
T
WHEN
ENGINE
IS
COLD
HARD
T
O
ST
AR
T
WHEN
ENGINE
IS
HOT
A
T
IDLE
DURING
DRIVING
WHEN
DECELERA
TING
BLACK
SMOKE
WHITE
SMOKE
New CT/CS
AA
AB
AC AD
AE
AF
AG AH AJ AK AL AM
AP
HA
Injec-
tion
timing
Advanced
q q
I I
q
I
q q
I
q
Retarded
q q
I I
q
I
q q
I
q
Electric injection
pump mainframe
I I I I
q q q q q
I
q q q
I I
q
q
I
q
q q q
—
*1
Injection nozzle
q q q q q q q
I
q q
q
I I
I
*2
Glow system
q q
I I
I
I
Engine body
q q
I I
q q q
I
q q
q
I I
q q q
I
EM-
section
*3
EGR system
I I
I
Air cleaner and
ducts
I I
I
q
MA-
section
*4
I
; High Possibility Item
q
; Low Possibility Item
*1: Insufficient or excess amount. Governor malfunction may be the cause.
*2: Depends on open-valve pressure and spray pattern.
*3: Caused mainly by insufficient compression pressure.
*4: Symptom varies depending on off-position of air duct, etc.
TROUBLE DIAGNOSES
TD27Ti
EC-340
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