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GEAR TRAIN
Camshaft drive gear, injection pump drive gear, oil pump gear,
idler gear, crankshaft gear and vacuum pump gear.
1. If gear tooth and key have scratches or are excessively worn,replace gear and key.
2. Check gear train backlash before disassembling and after assembling.
Method A (Using dial gauge)
Method B (Using fuse wire)
If beyond the limit, replace gear. Backlash:Standard0.07 - 0.11 mm (0.0028 - 0.0043 in)
Limit 0.20 mm (0.0079 in)
IDLER GEAR BUSHING CLEARANCE
1. Measure idler gear shaft outer diameter.
2. Measure idler gear bushing inner diameter.
3. Calculate idler gear bushing clearance. Bushing oil clearance:Standard0.025 - 0.061 mm (0.0010 - 0.0024 in)
Limit 0.20 mm (0.0079 in)
IDLER GEAR END PLAY
Measure idler gear end play between gear plate and gear. Idler gear end play:Standard0.03 - 0.14 mm (0.0012 - 0.0055 in)
Limit Less than 0.3 mm (0.012 in)
NEM186
NEM187
SEM666B
SEM705
ENGINE OVERHAULTD27Ti
Inspection (Cont'd)
EM-132
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IIf the battery is disconnected, the emission-related diagnostic information will be lost after approx.
24 hours.
I Erasing the emission-related diagnostic information using CONSULT-II is easier and quicker than
switching the diagnostic test mode using the data link connector.
NATS (Nissan Anti-Theft System)
IIf the security indicator lights up with the ignition switch in
the ªONº position or ªNATS MALFUNCTIONº is displayed
on ªSELF-DIAG RESULTSº screen, perform self-diagnostic
results mode with CONSULT-II using NATS program card.
Refer to ªNATS (Nissan Anti-Theft System)º in EL section.
I Confirm no self-diagnostic results of NATS is displayed
before touching ªERASEº in ªSELF-DIAG RESULTSº mode
with CONSULT-II.
I When replacing ECM, initialization of NATS system and
registration of all NATS ignition key IDs must be carried out
with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner.
Regarding the procedures of NATS initialization and NATS
ignition key ID registration, refer to CONSULT-II operation
manual, NATS.
Malfunction Indicator (MI)
DESCRIPTION
The MI is located on the instrument panel.
1. The MI will light up when the ignition switch is turned ON with-
out the engine running. This is a bulb check.
I If the MI does not light up, refer to EL section (ªWARNING
LAMPS AND CHIMEº) or see EC-310.
2. When the engine is started, the MI should go off. If the MI remains on, the on board diagnostic system has
detected an engine system malfunction.
If MI illuminates or blinks irregularly after starting engine,
water may have accumulated in fuel filter. Drain water from
fuel filter. Refer to MA section.
SEF252Z
SAT652J
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONZD30DDTi
Diagnostic Trouble Code (DTC) (Cont'd)
EC-34
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On board diagnostic system function
The on board diagnostic system has the following three functions.
Diagnostic Test Mode KEY and ENG. StatusFunctionExplanation of Function
Mode I Ignition switch in ON
position
Engine stopped
BULB CHECK This function checks the MI bulb for damage
(blown, open circuit, etc.).
If the MI does not come on, check MI circuit.
(See EC-310.)
Engine running
MALFUNCTION
WARNING This is a usual driving condition. When ECM
detects a malfunction, the MI will light up to
inform the driver that a malfunction has been
detected.
Mode II Ignition switch in ON position
Engine stopped
SELF-DIAGNOSTIC RESULTS This function allows DTCs to be read.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONZD30DDTi
Malfunction Indicator (MI) (Cont'd)
EC-35
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q1Electric fuel injection pump
q
2Key
q
3Bracket q
4Injection pump drive gear
q
5Dust cover
q
6Bracket q
7Gasket
q
8Gasket
Removal
1. Remove battery. Disconnect electronic injection pump harness connectors.
2. Set No. 1 piston at TDC on its compression stroke.
3. Remove fuel hoses (supply, return and spill) and injection tubes.
NEF460
EEF181
ELECTRONIC FUEL INJECTION PUMPTD27Ti
EC-341
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4. Remove dust cover and injection pump gear.Refer to EM section.
5. Remove fixing nuts and bolts. Then remove injection pump.
Installation
Install injection pump assembly in the reverse order of removal,
observing the following:
1. Confirm that No. 1 cylinder is set at TDC on its compression stroke.
2. Install injection pump (Refer to EM section).
(1) Temporarily set injection pump so that the flange of the pump is aligned with aligning mark on front cover.
(2) Install injection pump gear.
:59-69N ×m (6 - 7 kg-m, 43 - 51 ft-lb)
Make sure that the key does not fall into the front cover.
Make sure that ªZº marks are aligned.
(3) Apply liquid gasket to mating surface of injection pump gear cover and install it.
3. Adjust injection timing. Refer to ªBasic Inspectionº, EC-361.
4. Install all parts removed.
SEM653B
EEF160
EEF181
SEF337F
ELECTRONIC FUEL INJECTION PUMPTD27Ti
Removal (Cont'd)
EC-342
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How to Erase DTC (Without CONSULT-II)
1. If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least5 seconds and then turn it ªONº (engine stopped) again.
2. Change the diagnostic test mode from Mode II to Mode I by using the data link connector. (See EC-346.)
The emission related diagnostic information in the ECM can be erased by changing the diagnostic test mode.
I If the battery is disconnected, the emission-related diagnostic information will be lost after approx.
24 hours.
I Erasing the emission-related diagnostic information using CONSULT-II is easier and quicker than
switching the diagnostic test mode using the data link connector.
Malfunction Indicator (MI)
1. The malfunction indicator will light up when the ignition switch
is turned ON without the engine running. This is a bulb check.
I If the malfunction indicator does not light up, refer to EL sec-
tion (ªWARNING LAMPS/WIRING DIAGRAMº) or see MI &
DATA LINK CONNECTORS.
2. When the engine is started, the malfunction indicator should go off.
If the lamp remains on, the on board diagnostic system has
detected an engine system malfunction.
If MI illuminates or flashes irregularly after starting engine,
water may have accumulated in fuel filter. Drain water from
fuel filter.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following three functions.
Diagnostic
Test Mode KEY and ENG.
Status Function Explanation of Function
Mode I Ignition switch in
ON position
Engine stoppedBULB CHECK
This function checks the MI bulb for damage (blown, open
circuit, etc.).
If the MI does not come on, check MI circuit. (See EC-475.)
Engine running
MALFUNCTION
WARNING This is a usual driving condition. When ECM detects a
malfunction, the MI will light up to inform the driver that a mal-
function has been detected.
Mode II Ignition switch in
ON position
Engine stopped
SELF-DIAGNOSTIC
RESULTS
This function allows DTCs to be read.
SAT652J
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONTD27Ti
Diagnostic Trouble Code (DTC) (Cont'd)
EC-345
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DIAGNOSTIC TEST MODE IÐBULB CHECK
In this mode, the MALFUNCTION INDICATOR on the instrument panel should stay ON. If it remains OFF,
check the bulb. Refer to EL section (ªWARNING LAMPS/WIRING DIAGRAMº) or see EC-475.
DIAGNOSTIC TEST MODE IÐMALFUNCTION WARNING
MICondition
ON When a malfunction is detected or the ECM's CPU is malfunctioning.
OFF No malfunction.
I These Diagnostic Trouble Code Numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC
RESULTS).
DIAGNOSTIC TEST MODE IIÐSELF-DIAGNOSTIC RESULTS
In this mode, DTC is indicated by the number of blinks of the MI as shown below.
Long (0.6 second) blinking indicates the two LH digits of number and short (0.3 second) blinking indicates the
two RH digits of number. For example, the MI blinks 10 times for 6 seconds (0.6 sec x 10 times) and then it
blinks three times for about 1 second (0.3 sec x 3 times). This indicates the DTC ª1003º.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC ª0505º refers to no
malfunction. (See TROUBLE DIAGNOSIS Ð INDEX, EC-313.)
HOW TO ERASE DIAGNOSTIC TEST MODE II (Self-diagnostic results)
The diagnostic trouble code can be erased from the backup memory in the ECM when the diagnostic test mode
is changed from Diagnostic Test Mode II to Diagnostic Test Mode I repeating consecutively twice. (Refer to
ªHOW TO SWITCH DIAGNOSTIC TEST MODESº on previous page.)
IIf the battery terminal is disconnected, the diagnostic trouble code will be lost from the backup
memory within 24 hours.
I Be careful not to erase the stored memory before starting trouble diagnoses.
I If the MI flashes or ªNATS MALFUNCTIONº is displayed on ªSELF-DIAG RESULTSº screen, perform
self-diagnostic results mode with CONSULT-II using NATS program card (NATS-E940). Refer to EL
section.
I Confirm no self-diagnostic results of NATS is displayed before touching ªERASEº in ªSELF-DIAG
RESULTSº mode with CONSULT-II.
I When replacing ECM, initialisation of NATS system and registration of all NATS ignition key IDs
must be carried out with CONSULT-II using NATS program card (NATS-E940).
Therefore, be sure to receive all keys from vehicle owner.
SEF298QA
SEF162PB
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONTD27Ti
Malfunction Indicator (MI) (Cont'd)
EC-347
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Regarding the procedures of NATS initialisation and NATS ignition key ID registration, refer to
CONSULT-II operation manual, NATS.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONTD27Ti
Malfunction Indicator (MI) (Cont'd)EC-348
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