NISSAN ALMERA N16 2001 Electronic Repair Manual

Diagnostic ProcedureNJEC0671
1 INSPECTION START
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªSELF DIAG RESULTSº mode with CONSULT-II.
3. Touch ªERASEº.
4. Perform ªDTC Confirmation Procedureº, EC-664, again.
5. Is the DTC P1603 or P1607 displayed again?
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory.
3. Perform ªDTC Confirmation Procedureº, EC-664, again.
4. Perform ªDiagnostic Test Mode II (Self-diagnostic results)º.
5. Is the DTC 0301 or 0901 displayed again?
YesorNo
Ye s©Replace ECM.
No©INSPECTION END
DTC P1603 ECM 12, DTC P1607 ECM 2YD
Diagnostic Procedure
EC-665

ECM Terminals and Reference ValueNJEC0744Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA(DC Voltage)
107
108
109R
R
RPower supply for ECM[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
325 G ECM relay (Self-shutoff)[Ignition switch ªONº]
[Ignition switch ªOFFº]
+For a few seconds after turning ignition switch
ªOFFº0-1V
[Ignition switch ªOFFº]
+A few seconds passed after turning ignition
switch ªOFFºBATTERY VOLTAGE
(11 - 14V)
507 W/R Ignition switch[Ignition switch ªOFFº]0V
[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
On Board Diagnosis LogicNJEC0745
DTC Malfunction is detected when .... Check Items (Possible Cause)
P1620
0902+An irregular voltage signal from the ECM relay is
sent to ECM.+Harness or connectors
(ECM relay circuit is open or shorted.)
+ECM relay
SEF817Y
DTC Confirmation ProcedureNJEC0746WITH CONSULT-IINJEC0746S011) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Turn ignition switch ªOFFº, wait at least 20 seconds and then
turn ªONº.
4) If DTC is detected, go to ªDiagnostic Procedureº, EC-668.
WITHOUT CONSULT-IINJEC0746S021) Turn ignition switch ªONº.
2) Turn ignition switch ªOFFº, wait at least 20 seconds and then
turn ªONº.
3) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º with
ECM.
4) If DTC is detected, go to ªDiagnostic Procedureº, EC-668.
DTC P1620 ECM RLYYD
ECM Terminals and Reference Value
EC-666

Wiring DiagramNJEC0747
YEC018A
DTC P1620 ECM RLYYD
Wiring Diagram
EC-667

Diagnostic ProcedureNJEC0748
1 CHECK ECM POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM relay. (For ECM relay location, refer to ªEngine Control Component Parts Locationº.)
3. Check voltage between ECM terminals 1, 6 and ground with CONSULT-II or tester.
SEF399Y
OK or NG
OK©GO TO 3.
NG©GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
1. 20A fuse
2. 10A fuse
3. Harness for open and short between ECM relay and battery
©Repair open circuit or short to ground or short to power in harness or connectors.
3 CHECK ECM INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 107, 108, 109 and ECM relay terminal 7. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 5.
NG©GO TO 4.
4 DETECT MALFUNCTIONING PART
Check the following.
1. Harness connectors E75, F36
2. Harness for open and short between ECM and ECM relay
©Repair open circuit or short to ground or short to power in harness or connectors.
5 CHECK ECM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 325 and ECM relay terminal 2. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 7.
NG©GO TO 6.
DTC P1620 ECM RLYYD
Diagnostic Procedure
EC-668

6 DETECT MALFUNCTIONING PART
Check the following.
1. Harness connectors E174, M159
2. Harness connectors M63, F102
3. Harness for open and short between ECM and ECM relay
©Repair open circuit or short to ground or short to power in harness or connectors.
7 CHECK ECM RELAY
1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between ECM relay terminals 3 and 5, 6 and 7.
SEF296X
OK or NG
OK©GO TO 8.
NG©Replace ECM relay.
8 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-559.
©INSPECTION END
DTC P1620 ECM RLYYD
Diagnostic Procedure (Cont'd)
EC-669

SEC220B
DescriptionNJEC0749The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the engine.
On Board Diagnosis LogicNJEC0750
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1621
0903+ECM input signal processing function is malfunc-
tioning.+ECM
(ECCS-D control module)
SEF817Y
DTC Confirmation ProcedureNJEC0751WITH CONSULT-IINJEC0751S011) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Turn ignition switch ªOFFº, wait at least 20 seconds and then
turn ªONº.
4) If DTC is detected, go to ªDiagnostic Procedureº, EC-671.
WITHOUT CONSULT-IINJEC0751S021) Turn ignition switch ªONº and wait at least 2 seconds.
2) Turn ignition switch ªOFFº, wait at least 20 seconds and then
turn ªONº.
3) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º with
ECM.
4) If DTC is detected, go to ªDiagnostic Procedureº, EC-671.
DTC P1621 ECM 15YD
Description
EC-670

Diagnostic ProcedureNJEC0752
1 INSPECTION START
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªSELF DIAG RESULTSº mode with CONSULT-II.
3. Touch ªERASEº.
4. Perform ªDTC Confirmation Procedureº, EC-670, again.
5. Is the DTC P1621 displayed again?
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory.
3. Perform ªDTC Confirmation Procedureº, EC-670, again.
4. Perform ªDiagnostic Test Mode II (Self-diagnostic results)º.
5. Is the DTC 0903 displayed again?
YesorNo
Ye s©Replace ECM.
No©INSPECTION END
DTC P1621 ECM 15YD
Diagnostic Procedure
EC-671

On Board Diagnosis LogicNJEC1258The ECM checks if battery voltage is within the tolerance range for the engine control system.
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1660
0502+An abnormally high or low voltage from the battery
is sent to ECM.+Incorrect jump starting
+Battery
+Alternator
+ECM
DTC Confirmation ProcedureNJEC1259With CONSULT-II
1) Check the following.
+Jumper cables are connected for jump starting.
+Battery or alternator has been replaced.
If the result is ªYesº for one item or more, skip the following steps and go to ªDiagnostic Procedureº,
EC-672.
2) Check that the positive battery terminal is connected to battery properly. If NG, reconnect it properly.
3) Check that the alternator functions properly. Refer to SC-26, ªTrouble Diagnosisº.
4) Turn ignition switch ªONº and select ªDATA MONITORº mode with CONSULT-II.
5) Wait one minute.
6) If DTC is detected, go to ªDiagnostic Procedureº, EC-672.
If DTC is not detected, go to next step.
7) Start engine and wait one minute at idle.
8) If DTC is detected, go to ªDiagnostic Procedureº, EC-672.
Without CONSULT-II
1) Check the following.
+Jumper cables are connected for jump starting.
+Battery or alternator has been replaced.
If the result is ªYesº for one item or more, skip the following steps and go to ªDiagnostic Procedureº,
EC-672.
2) Check that the positive battery terminal is connected to battery properly. If NG, reconnect it properly.
3) Check that the alternator functions properly. Refer to SC-26, ªTrouble Diagnosisº.
4) Turn ignition switch ªONº and wait one minute.
5) Turn ignition switch ªOFFº, wait 5 seconds and then turn ªONº.
6) Perform ªDiagnostic Test Mode II (Self-diagnostic result)º with ECM.
7) If DTC is detected, go to ªDiagnostic Procedureº, EC-672.
If DTC is not detected, go to next step.
8) Start engine and wait one minute at idle.
9) Turn ignition switch ªOFFº, wait 5 seconds and then turn ªONº.
10) Perform ªDiagnostic Test Mode II (Self-diagnostic result)º with ECM.
11) If DTC is detected, go to ªDiagnostic Procedureº, EC-672.
Diagnostic ProcedureNJEC1260
1 INSPECTION START
Are jumper cables connected for the jump starting?
YesorNo
Ye s©GO TO 3.
No©GO TO 2.
DTC P1660 BATTERY VOLTAGEYD
On Board Diagnosis Logic
EC-672

2 CHECK BATTERY AND ALTERNATOR
Check that the proper type of battery and alternator is installed.
Refer to SC-34, ªBatteryº and SC-35, ªAlternatorº.
OK or NG
OK©GO TO 5.
NG©Replace with a proper one.
3 CHECK JUMPER CABLES INSTALLATION
Check that the jumper cables are connected in the correct sequence.
SEF439Z
OK or NG
OK©GO TO 4.
NG©Reconnect jumper cables properly.
4 CHECK BATTERY FOR BOOSTER
Check that the battery for the booster is a 12V battery.
OK or NG
OK©GO TO 5.
NG©Change the vehicle for booster.
5 PERFORM DTC CONFIRMATION PROCEDURE AGAIN
Perform ªDTC Confirmation Procedureº, EC-672, again.
OK or NG
OK©GO TO 6.
NG©Replace ECM.
6 CHECK ELECTRICAL PARTS DAMAGE
Check the following for damage.
+Wiring harness and harness connectors for burn
+Fuses for short
OK or NG
OK©INSPECTION END
NG©Repair or replace malfunctioning part.
DTC P1660 BATTERY VOLTAGEYD
Diagnostic Procedure (Cont'd)
EC-673

SEF437Y
DescriptionNJEC0721SYSTEM DESCRIPTIONNJEC0721S01The ECM and the electronic control fuel injection pump control unit
(abbreviated as the injection pump control unit) perform the real
time communication (signal exchange).
The ECM transmits the signals of the target fuel injection amount,
target fuel injection timing, and engine speed, etc., and receives
the signals of the pump speed and fuel temperature, etc. from the
injection pump control unit.
By those signals, the injection pump controls the optimum fuel
injection amount and injection timing of the spill valve and timing
control valve.
Injection pump control unit has an on board diagnostic system,
which detects malfunctions related to sensors or actuators built-into
electronic control fuel injection pump. These malfunction informa-
tion are transferred through the line (circuit) from injection pump
control unit to ECM.
FUEL INJECTION AMOUNT CONTROLNJEC0721S02In accordance with the target fuel injection amount signal from the
ECM, the injection amount is controlled by controlling the spill valve
in the injection pump and by changing the needle opening time.
FUEL INJECTION TIMING CONTROLNJEC0721S03Based on the target fuel injection timing signal from the ECM, the
injection timing is controlled in accordance with the timer spring by
performing the duty control of the timing control valve in the injec-
tion pump and by adjusting the pressure of the timer piston high
pressure chamber.
FUEL TEMPERATURE SENSORNJEC0721S04The sensor detects the fuel temperature in the injection pump and
calibrates the injection amount change by the fuel temperature.
CAM RING POSITION SENSORNJEC0721S05The sensor detects the passing of the protrusion on the sensor
wheel in the injection pump by the semiconductor magnetic resis-
tance element sensor. The cam ring position sensor synchronizes
with the cam ring, and detects the actual advance amount. The
injection pump control unit measures the injection pump revolution
by the signal of the cam ring position sensor.
CONSULT-II Reference Value in Data Monitor
Mode
NJEC0722Remarks: Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
FUEL TEMP SEN+Engine: After warming up More than 40ÉC (104ÉF)
SPILL/V+Engine: After warming up, idle the engine. Approx. 12 - 13ÉCA
INT/A VOLUME+Engine: After warming up, idle the engine. Approx. 150 - 450 mg/st
F/CUT SIGNAL+Engine: After warming up Idle ON
DTC P1690 P5´PUMP C/MODULEYD
Description
EC-674