NISSAN ALMERA N16 2003 Electronic Repair Manual

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 “ON”]BATTERY VOLTAGE
(11 - 14V)
325 G ECM relay (Self-shutoff)[Ignition switch “ON”]
[Ignition switch “OFF”]
For a few seconds after turning ignition switch
“OFF”0-1V
[Ignition switch “OFF”]
A few seconds passed after turning ignition switch
“OFF”BATTERY VOLTAGE
(11 - 14V)
507 W/R Ignition switch[Ignition switch “OFF”]0V
[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
On Board Diagnosis LogicNJEC0745This self-diagnosis has the one trip detection logic.
DTC Malfunction is detected when .... Check Items (Possible Cause)
P1620
0902An 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 “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Turn ignition switch “OFF”, wait at least 20 seconds and then
turn “ON”.
4) If DTC is detected, go to “Diagnostic Procedure”, EC-179.
WITHOUT CONSULT-IINJEC0746S021) Turn ignition switch “ON”.
2) Turn ignition switch “OFF”, wait at least 20 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4) If DTC is detected, go to “Diagnostic Procedure”, EC-179.
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DTC P1620 ECM RLYYD
ECM Terminals and Reference Value
EC-177

Wiring DiagramNJEC0747
YEC327A
DTC P1620 ECM RLYYD
Wiring Diagram
EC-178

Diagnostic ProcedureNJEC0748
1 CHECK ECM POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM relay. (For ECM relay location, refer to “Engine ControlComponent Parts Location”.)
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.
20A fuse
10A fuse
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 “OFF”.
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.
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DTC P1620 ECM RLYYD
Diagnostic Procedure
EC-179

6 DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E174, M159 (LHD models)
Harness connectors E251, M182 (RHD models)
Harness connectors M63, F102
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 “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-71.
INSPECTION END
DTC P1620 ECM RLYYD
Diagnostic Procedure (Cont’d)
EC-180

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 LogicNJEC0750This self-diagnosis has the one trip detection logic.
The MI will not light up for this self-diagnosis.
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1621
0903ECM input signal processing function is malfunc-
tioning.ECM
(ECCS-D control module)
SEF817Y
DTC Confirmation ProcedureNJEC0751WITH CONSULT-IINJEC0751S011) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Turn ignition switch “OFF”, wait at least 20 seconds and then
turn “ON”.
4) If DTC is detected, go to “Diagnostic Procedure”, EC-182.
WITHOUT CONSULT-IINJEC0751S021) Turn ignition switch “ON” and wait at least 2 seconds.
2) Turn ignition switch “OFF”, wait at least 20 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4) If DTC is detected, go to “Diagnostic Procedure”, EC-182.
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DTC P1621 ECM 15YD
Description
EC-181

Diagnostic ProcedureNJEC0752
1 INSPECTION START
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SELF DIAG RESULTS” mode with CONSULT-II.
3. Touch “ERASE”.
4. Perform “DTC Confirmation Procedure”, EC-181, again.
5. Is the DTC P1621 displayed again?
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory.
3. Perform “DTC Confirmation Procedure”, EC-181, again.
4. Perform “Diagnostic Test Mode II (Self-diagnostic results)”.
5. Is the DTC 0903 displayed again?
YesorNo
Yes Replace ECM.
NoINSPECTION END
DTC P1621 ECM 15YD
Diagnostic Procedure
EC-182

On Board Diagnosis LogicNJEC1258The ECM checks if battery voltage is within the tolerance range for the engine control system.
This self-diagnosis has the one trip detection logic.
The MI will not light up for this self-diagnosis.
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1660
0502An 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 “Yes” for one item or more, skip the following steps and go to“Diagnostic Procedure”,
EC-183.
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-29, “TroubleDiagnosis”.
4) Turn ignition switch “ON” and select “DATA MONITOR” mode with CONSULT-II.
5) Wait one minute.
6) If DTC is detected, go to “Diagnostic Procedure”, EC-183.
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 “Diagnostic Procedure”, EC-183.
Without CONSULT-II
1) Check the following.
Jumper cables are connected for jump starting.
Battery or alternator has been replaced.
If the result is “Yes” for one item or more, skip the following steps and go to“Diagnostic Procedure”,
EC-183.
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-29, “TroubleDiagnosis”.
4) Turn ignition switch “ON” and wait one minute.
5) Turn ignition switch “OFF”, wait 5 seconds and then turn “ON”.
6) Perform “Diagnostic Test Mode II (Self-diagnostic result)” with ECM.
7) If DTC is detected, go to “Diagnostic Procedure”, EC-183.
If DTC is not detected, go to next step.
8) Start engine and wait one minute at idle.
9) Turn ignition switch “OFF”, wait 5 seconds and then turn “ON”.
10) Perform “Diagnostic Test Mode II (Self-diagnostic result)” with ECM.
11) If DTC is detected, go to “Diagnostic Procedure”, EC-183.
Diagnostic ProcedureNJEC1260
1 INSPECTION START
Are jumper cables connected for the jump starting?
YesorNo
Ye s G O T O 3 .
No GO TO 2.
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DTC P1660 BATTERY VOLTAGEYD
On Board Diagnosis Logic
EC-183

2 CHECK BATTERY AND ALTERNATOR
Check that the proper type of battery and alternator is installed.
Refer to SC-37, “Battery” and SC-38, “Alternator”.
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 “DTC Confirmation Procedure”, EC-183, 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
OKINSPECTION END
NG Repair or replace malfunctioning part.
DTC P1660 BATTERY VOLTAGEYD
Diagnostic Procedure (Cont’d)
EC-184

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 40°C (104°F)
SPILL/V Engine: After warming up, idle the engine. Approx. 12 - 13°CA
INT/A VOLUME Engine: After warming up, idle the engine. Approx. 150 - 450 mg/st
F/CUT SIGNAL Engine: After warming up Idle ON
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DTC P1690 P5·PUMP C/MODULEYD
Description
EC-185

MONITOR ITEM CONDITION SPECIFICATION
BARO SEN Ignition switch: ONAltitude
Approx. 0 m (0 ft): Approx. 100.62
kPa (1.0062 bar, 1.026 kg/cm
2,
14.59 psi)
Approx. 1,000 m (3,218 ft): Approx.
88.95 kPa (0.8895 bar, 0.907
kg/cm
2, 12.90 psi)
Approx. 1,500 m (4,922 ft): Approx.
83.16 kPa (0.8316 bar, 0.848
kg/cm
2, 12.06 psi)
Approx. 2,000 m (6,562 ft): Approx.
78.36 kPa (0.7836 bar, 0.799
kg/cm
2, 11.36 psi)
ECM Terminals and Reference ValueNJEC0723Specification 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)
313 L/WElectronic control fuel
injection pump[Engine is running]
Warm-up condition
Idle speedApproximately 0.1V
314 L/RElectronic control fuel
injection pump[Engine is running]
Warm-up condition
Idle speedApproximately 0.4V
316 PUElectronic control fuel
injection pump[Engine is running]
Warm-up condition
Idle speedApproximately 2.5V
317 PElectronic control fuel
injection pump[Engine is running]
Warm-up condition
Idle speedApproximately 2.5V
On Board Diagnosis LogicNJEC0724
DTC Malfunction is detected when .... Check Items (Possible cause)
P1690
0705Injection pump control unit does not function
properly.Electronic control fuel injection pump
SEF817Y
DTC Confirmation ProcedureNJEC0725WITH CONSULT-IINJEC0725S011) Turn ignition switch “ON” and wait at least 2 seconds.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine and run it for at least 2 seconds at idle speed.
(If engine does not run, turn ignition switch to “START” for at
least 2 seconds.)
4) If DTC is detected, go to “Diagnostic Procedure”, EC-187.
WITHOUT CONSULT-IINJEC0725S021) Turn ignition switch “ON” and wait at least 2 seconds.
DTC P1690 P5·PUMP C/MODULEYD
CONSULT-II Reference Value in Data Monitor Mode (Cont’d)
EC-186