NISSAN PICK-UP 2001 Repair Manual

Air Bleeding
Pump the priming pump to bleed air.
+When air is bled completely, the pumping of the priming
pump suddenly becomes heavy. Stop operation at that
time.
+If it is difficult to bleed air by the pumping of the prim-
ing pump (the pumping of the priming pump does not
become heavy), disconnect the fuel supply hose
between the fuel filter and the injection pump. Then, per-
form the operation described above, and make sure that
fuel comes out. (Use a pan, etc. so as not to spill fuel.
Do not let fuel get on engine and other parts.) After that,
connect the hose, and then bleed air again.
+Start engine and let it idle for at least one minute after
performing air bleeding.
Water Draining
EXCEPT FOR EUROPE
+If the MIL illuminates or blinks during the engine operation,
drain the water as follows.
1. Loosen drain cock and drain water.
Loosening drain cock four to five turns causes water to
start draining.
Do not remove drain cock by loosening it excessively.
If water does not drain properly, move the priming up and
down.
Water amount when the MIL blinks:
90 - 150 m!(3.2 - 5.3 Imp fl oz)
CAUTION:
When the water is drained, the fuel is also drained. Use a
pan, etc. to avoid fuel adherence to the rubber parts such as
the engine mount insulator.
Do not over-tighten the water draining cock. This will dam-
age the cock thread, resulting in water or fuel leak.
2. Bleed air of the fuel filter. Refer to EC-3426.
3. Start the engine, then check that the MIL goes off.
FOR EUROPE
1. Loosen drain cock and drain water.
Loosening drain cock four to five turns causes water to
start draining.
Do not remove drain cock by loosening it excessively.
If water does not drain properly, move the priming handle up
and down.
CAUTION:
When the water is drained, the fuel is also drains. Use a pan,
etc. to avoid fuel adherence to rubber parts such as the
engine mount insulator.
Do not over-tighten the water drain cock. This will damage
the cock thread, resulting in water or fuel leak.
SMA825B
BASIC SERVICE PROCEDUREYD25DDTi
EC-3426

2. Bleed air of the fuel filter. Refer to EC-3426.
Accelerator Position Sensor Idle Position
Learning
DESCRIPTION
ªAccelerator Position Sensor Idle Position Learningº is an opera-
tion to clear the self-learning fully closed accelerator position.
It must be performed each time harness connector of accelera-
tor position sensor or ECM is disconnected.
OPERATION PROCEDURE
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªOFF ACCEL PO SIGº in ªACTIVE TESTº mode with
CONSULT-II.
3. Touch ªCLEARº.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Let engine idle for 10 minutes.
BASIC SERVICE PROCEDUREYD25DDTi
EC-3427

DTC and MIL Detection Logic
When a malfunction is detected, the malfunction (DTC) is stored in the ECM memory.
The MIL will light up each time the ECM detects malfunction. For diagnostic items causing the MIL to light
up, refer to ªTROUBLE DIAGNOSIS Ð INDEXº, EC-3400.
Diagnostic Trouble Code (DTC)
HOW TO READ DTC
The DTC can be read by the following methods.
Without CONSULT-II
ECM displays the DTC by a set of four digit numbers with MIL illumination in the diagnostic test mode II
(Self-diagnostic results). Example: 0407, 1004, etc.
With CONSULT-II
CONSULT-II displays the DTC in ªSELF-DIAG RESULTSº mode. Examples: ªCRANK POS SEN (TDC)º, etc.
HOW TO ERASE DTC
How to erase DTC (
With CONSULT-II)
1.If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least
5 seconds and then turn it ªONº (engine stopped) again.
2. Touch ªENGINEº.
3. Touch ªSELF-DIAG RESULTSº.
4. Touch ªERASEº. (The DTC in the ECM will be erased.)
The emission related diagnostic information in the ECM can be erased by selecting ªERASEº in the ªSELF-
DIAG RESULTSº mode with CONSULT-II.
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 least
5 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-3432.)
The emission related diagnostic information in the ECM can be erased by changing the diagnostic test mode.
+If the battery is disconnected, the emission-related diagnostic information will be lost after
approx. 24 hours.
SEC944C
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONYD25DDTi
EC-3428

+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)
+If the security indicator lights up with the ignition switch
in the ªONº position or ªNATS MALFUNCTIONº is dis-
played on ªSELF-DIAG RESULTSº screen, perform self-
diagnostic results mode with CONSULT-II using NATS
program card. Refer to ªNATS (Nissan Anti-Theft Sys-
tem)º in EL section.
+Confirm no self-diagnostic results of NATS is displayed
before touching ªERASEº in ªSELF-DIAG RESULTSº
mode with CONSULT-II.
+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 CON-
SULT-II operation manual, NATS.
Malfunction Indicator Lamp (MIL)
DESCRIPTION
The MIL is located on the instrument panel.
1. The MIL will light up when the ignition switch is turned ON
without the engine running. This is a bulb check.
+If the MIL does not light up, refer to EL section (ªWARNING
LAMPS AND CHIMEº) or see EC-3647.
2. When the engine is started, the MIL should go off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.
Fuel filter switch is equipped except for Europe.
If MIL illuminates or blinks irregularly after starting engine,
water may have accumulated in fuel filter. Drain water from
fuel filter. Refer to EC-3426.
On board diagnostic system function
The on board diagnostic system has the following three func-
tions.
SEF252Z
SAT652J
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONYD25DDTi
Diagnostic Trouble Code (DTC) (Cont'd)
EC-3429

Diagnostic Test Mode KEY and ENG. Status Function Explanation of Function
Mode I Ignition switch in ON
position
Engine stopped
BULB CHECK This function checks the MIL bulb for dam-
age (blown, open circuit, etc.).
If the MIL does not come on, check MIL cir-
cuit. (See EC-3647.)
Engine running
MALFUNCTION
WARNINGThis is a usual driving condition. When ECM
detects a malfunction, the MIL 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 DESCRIPTIONYD25DDTi
Malfunction Indicator Lamp (MIL) (Cont'd)
EC-3430

HOW TO SWITCH DIAGNOSTIC TEST MODES
*1: EC-3647 *2: EC-3429 *3: EC-3647
SEC945C
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONYD25DDTi
Malfunction Indicator Lamp (MIL) (Cont'd)
EC-3431

Diagnostic test mode I Ð Bulb check
In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to
EL section, ªWARNING LAMPS AND CHIMEº or see EC-3647.
Diagnostic test mode I Ð Malfunction warning
MIL Condition
ON When the malfunction is detected or the ECM's CPU is malfunctioning.
OFF No malfunction.
Diagnostic test mode II Ð Self-diagnostic results
In this mode, DTC is indicated by the number of blinks of the MIL 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 MIL 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-3400.)
How to erase diagnostic test mode II (Self-diagnostic results)
The DTC 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. (Refer to ªHow to Switch Diagnostic Test Modesº,
EC-3431.)
+If the battery terminal is disconnected, the DTC will be lost from the backup memory within 24
hours.
+Be careful not to erase the stored memory before starting trouble diagnoses.
SEF298QA
SEF162PB
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONYD25DDTi
Malfunction Indicator Lamp (MIL) (Cont'd)
EC-3432

Relationship between MIL, DTC, CONSULT-II and driving patterns
*1: When a malfunction is detected,
MIL will light up.
*2: When the same malfunction is
detected in two consecutive driving
patterns, MIL will stay lit up.
*3: When a malfunction is detected for
the first time, the DTC will be
stored in ECM.*4: The DTC will not be displayed any
longer after vehicle is driven 40
times without the same malfunc-
tion. (The DTC still remain in
ECM.)*5: Other screens except SELF-DIAG-
NOSTIC RESULTS & DATA MONI-
TOR (AUTO TRIG) cannot display
the malfunction. DATA MONITOR
(AUTO TRIG) can display the mal-
function at the moment it is
detected.
SEC946C
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONYD25DDTi
Malfunction Indicator Lamp (MIL) (Cont'd)
EC-3433

CONSULT-II
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Connect CONSULT-II to data link connector, which is located
under the driver side dash panel.
3. Turn ignition switch ON.
4. Touch ªSTARTº.
5. Touch ªENGINEº.
6. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation
Manual.
SEC233D
SEF995X
PBIB0410E
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONYD25DDTi
EC-3434

ENGINE CONTROL COMPONENT PARTS/CONTROL
SYSTEMS APPLICATION
ItemDIAGNOSTIC TEST MODE
SELF-DIAG
RESULTSDATA MONI-
TORACTIVE
TEST
ENGINE CONTROL COMPONENT PARTS
INPUTEngine coolant temperature sensor X X
Intake air temperature sensor X X
Vehicle speed sensor X X
Accelerator position sensor X X X
Accelerator position switch X X
Crankshaft position sensor (TDC) X X
Ignition switch (start signal) X
Park/Neutral position (PNP) switch X
Battery voltage X
Air conditioner switch X
Brake pedal position switch X X
Charge air pressure sensor X X
Heat up switch X
Stop lamp switch X X
OUTPUTGlow relayXX
EGR volume control valve X X X
Cooling fan relay X X X
Air conditioner relay X
X: Applicable
SELF-DIAGNOSTIC MODE
Regarding items detected in ªSELF-DIAG RESULTSº mode,
refer to ªTROUBLE DIAGNOSIS Ð INDEXº, EC-3400.
DATA MONITOR MODE
Monitored item
[Unit]ECM
input
signalsMain
signalsDescription Remarks
CKPSzRPM (TDC)
[rpm]jj+The engine speed computed from the
crankshaft position sensor (TDC) signal
is displayed.
CMPSzRPMzPUMP
[rpm]jj+The engine speed computed from the
pulse signal sent from electronic control
fuel injection pump is displayed.
COOLAN TEMP/S
[ÉC] or [ÉF]
jj+The engine coolant temperature (deter-
mined by the signal voltage of the
engine coolant temperature sensor) is
displayed.+When the engine coolant temperature
sensor is open or short-circuited, ECM
enters fail-safe mode. The engine cool-
ant temperature determined by the ECM
is displayed.
VHCL SPEED SE
[km/h] or [mph]jj+The vehicle speed computed from the
vehicle speed sensor signal is displayed.
FUEL TEMP SEN
[ÉC] or [ÉF]jj+The fuel temperature (sent from elec-
tronic control fuel injection pump) is dis-
played.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONYD25DDTi
CONSULT-II (Cont'd)
EC-3435