2003 NISSAN ALMERA N16 ecm

ECM Terminals and Reference ValueNJEC0761Specification 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)
214 W/B Glow relay Refer to “SYSTEM DESCRIPTION”, EC-188.
508 OR Glow indicator lamp[Ignition switch “ON”]
Glow indicator lamp is “ON”Approximately 1V
[Ignition switch “ON”]
Glow indicator lamp is “OFF”BATTERY VOLTAGE
(11 - 14V)
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GLOW CONTROL SYSTEMYD
ECM Terminals and Reference Value
EC-189

4 CHECK GLOW INDICATOR LAMP OPERATION
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Confirm that the voltage between ECM terminal 347 (Engine coolant temperature sensor signal) and ground is above
1.36V. If it is below 1.36V, cool down engine.
SEF442Z
3. Turn ignition switch “OFF”, wait at least 5 seconds and then turn “ON”.
4. Make sure that glow indicator lamp is turned “ON” for 1.5 seconds or more after turning ignition switch “ON”, and then
turned “OFF”.
OK or NG
OK GO TO 5.
NG GO TO 6.
5 CHECK GLOW CONTROL SYSTEM OVERALL FUNCTION
1. Turn ignition switch “OFF”.
2. Set voltmeter probe between glow plug and engine body.
3. Turn ignition switch “ON”.
4. Check the voltage between glow plug and engine body under the following conditions.
SEF431Y
OK or NG
OKINSPECTION END
NG GO TO 11.
GLOW CONTROL SYSTEMYD
Diagnostic Procedure (Cont’d)
EC-192

6 CHECK GLOW INDICATOR LAMP POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect combination meter harness connector M171.
3. Turn ignition switch “ON”.
4. Check voltage between combination meter terminal 30 and ground with CONSULT-II or tester.
YEC396A
OK or NG
OK GO TO 8.
NG GO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
1. Fuse block (J/B) connector M1
2. 10A fuse
3. Harness for open or short between combination meter and fuse
Repair open circuit or short to ground or short to power in harness or connectors.
8 CHECK GLOW INDICATOR LAMP OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Disconnect combination meter harness connector M171.
4. Check harness continuity between ECM terminal 508 and combination meter terminal 47. Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK GO TO 10.
NG GO TO 9.
9 DETECT MALFUNCTIONING PART
Check the following.
1. Harness connectors M63, F102
2. Harness for open or short between combination meter and ECM
Repair open circuit or short to ground or short to power in harness or connectors.
10 CHECK COMBINATION METER
Check combination meter and glow indicator lamp. Refer to EL-110, “Meter and Gauges”.
OK or NG
OK GO TO 18.
NG Repair or replace combination meter or glow indicator lamp.
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GLOW CONTROL SYSTEMYD
Diagnostic Procedure (Cont’d)
EC-193

11 CHECK GLOW RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect glow relay.
SEF391Y
3. Check voltage between glow relay terminals 1, 5 and ground with CONSULT-II or tester.
SEF420Y
OK or NG
OK GO TO 13.
NG GO TO 12.
12 DETECT MALFUNCTIONING PART
Check the following.
60A fusible link
Harness for open or short between glow relay and battery
Repair harness or connectors.
13 CHECK GLOW RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 214 and glow relay terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK GO TO 15.
NG GO TO 14.
14 DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E75, F36
Harness for open or short between glow relay and ECM
Repair open circuit or short to ground or short to power in harness or connectors.
GLOW CONTROL SYSTEMYD
Diagnostic Procedure (Cont’d)
EC-194

DescriptionNJEC0764SYSTEM DESCRIPTIONNJEC0764S01
Sensor Input Signal to ECM ECM Function Actuator
Electronic controlled fuel injection pump Fuel injection signal
EGR volume con-
trolEGR volume control
valve Crankshaft position sensor (TDC) Engine speed
Vehicle speed sensor Vehicle speed
Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Accelerator position sensor Accelerator position
Mass air flow sensor Amount of intake air
Air conditioner switch Air conditioner operation
Electrical load Electrical load signal
This system controls flow rate of EGR led from exhaust manifold
to intake manifold. The opening of the EGR by-pass passage in the
EGR volume control valve changes to control the flow rate. A
built-in step motor moves the valve in steps corresponding to the
ECM output pulses. The opening of the valve varies for optimum
engine control. The optimum value stored in the ECM is determined
by considering various engine conditions.
The EGR volume control valve remains close under the following
conditions.
Engine stopped
Engine starting
Low engine coolant temperature
Excessively high engine coolant temperature
High engine speed
Wide open throttle
SEF908Y
SEF411Y
COMPONENT DESCRIPTIONNJEC0764S02EGR Volume Control ValveNJEC0764S0201The EGR volume control valve uses a step motor to control the flow
rate of EGR from exhaust manifold. This motor has four winding
phases. It operates according to the output pulse signal of the
ECM. Two windings are turned ON and OFF in sequence. Each
time an ON pulse is issued, the valve opens or closes, changing
the flow rate. When no change in the flow rate is needed, the ECM
does not issue the pulse signal. A certain voltage signal is issued
so that the valve remains at that particular opening.
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EGR VOLUME CONTROL SYSTEMYD
Description
EC-197

CONSULT-II Reference Value in Data Monitor
Mode
NJEC0765Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
EGR VOL CON/VEngine: After warming up
Air conditioner switch: “OFF”
Shift lever: Neutral position
No-loadAfter one minute at idle More than 10 step
Revving engine up to 3,200 rpm 0 step
ECM Terminals and Reference ValueNJEC0766Specification 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)
337
338
350
351W/L
PU/W
GY
OR/BEGR volume control valve[Engine is running]
Warm-up condition
Idle speed0.1 - 14V
(Voltage signals of each
ECM terminals differ
according to the control
position of EGR volume
control valve.)
EGR VOLUME CONTROL SYSTEMYD
CONSULT-II Reference Value in Data Monitor Mode
EC-198

Diagnostic ProcedureNJEC0768
1 CHECK EGR VOLUME CONTROL SYSTEM OVERALL FUNCTION
1. Turn ignition switch “OFF”.
2. Set the oscilloscope probe between ECM terminals 337, 338, 350, 351 and ground.
3. Start engine and let it idle.
4. Check the oscilloscope screen when revving engine up to 3,200 rpm and return to idle.
SEF247Z
OK or NG
OKINSPECTION END
NG GO TO 2.
2 CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-I
1. Turn ignition switch “OFF”.
2. Disconnect EGR volume control valve harness connector.
SEF388Y
3. Turn ignition switch “ON”.
4. Check voltage between EGR volume control valve terminals 2, 5 and groundwith CONSULT-II or tester.
YEC397A
OK or NG
OK GO TO 8.
NG GO TO 3.
EGR VOLUME CONTROL SYSTEMYD
Diagnostic Procedure
EC-200

3 CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-II
1. Turn ignition switch “OFF”.
2. Disconnect ECM relay. (For ECM relay location, refer to “Engine ControlComponent Parts Location”.)
3. Check harness continuity between ECM relay terminal 5 and EGR volume control valve terminals 2 and 5. Refer to
Wiring Diagram.
Continuity should exist.
OK or NG
OK GO TO 5.
NG GO TO 4.
4 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 or short between ECM relay and EGR volume control valve
Repair open circuit or short to power in harness or connectors.
5 CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-III
Check voltage between ECM relay terminal 3 and ground with CONSULT-II or tester.
SEF413Y
OK or NG
OK GO TO 7.
NG GO TO 6.
6 DETECT MALFUNCTIONING PART
Check the following.
10A fuse
Harness for open or short between ECM relay and battery
Repair open circuit or short to ground or short to power in harness or connectors.
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EGR VOLUME CONTROL SYSTEMYD
Diagnostic Procedure (Cont’d)
EC-201