2007 NISSAN TIIDA EC Engine Control System

PRECAUTIONS
EC-1031
< PRECAUTION >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
When connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM pin
terminal, when connecting pin connectors.
Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge) volt-
age to develop in coil and condenser, thus resulting in dam-
age to ICs.
Keep engine control system harness at least 10 cm (4 in) away
from adjacent harness, to prevent engine control system mal-
functions due to receiving external noise, degraded operation
of ICs, etc.
Keep engine control system parts and harness dry.
Before replacing ECM, perform ECM Terminals and Reference
Value inspection and make sure ECM functions properly.
Refer to EC-990, "
Reference Value".
Handle mass air flow sensor carefully to avoid damage.
Do not clean mass air flow sensor with any type of detergent.
Do not disassemble electric throttle control actuator.
Even a slight leak in the air intake system can cause serious
incidents.
Do not shock or jar the camshaft position sensor (PHASE),
crankshaft position sensor (POS).
After performing each TROUBLE DIAGNOSIS, perform DTC
CONFIRMATION PROCEDURE or Component Function
Check. The DTC should not be displayed in the DTC Confirmation
Procedure if the repair is completed. The Component Function
Check should be a good result if the repair is completed.
PBIB0090E
MEF040D
SAT652J

EC-1032
< PRECAUTION >[MR18DE]
PRECAUTIONS
When measuring ECM signals with a circuit tester, never allow
the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.
Do not use ECM ground terminals when measuring input/out-
put voltage. Doing so may result in damage to the ECM’s tran-
sistor. Use a ground other than ECM terminals, such as the
ground.
Do not operate fuel pump when there is no fuel in lines.
Tighten fuel hose clamps to the specified torque.
Do not depress accelerator pedal when starting.
Immediately after starting, do not rev up engine unnecessar-
ily.
Do not rev up engine just prior to shutdown.
When installing C.B. ham radio or a mobile phone, be sure to
observe the following as it may adversely affect electronic
control systems depending on installation location.
-Keep the antenna as far as possible from the electronic con-
trol units.
-Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
-Adjust the antenna and feeder line so that the standing-wave
ratio can be kept smaller.
-Be sure to ground the radio to vehicle body.
SEF348N
SEF709Y
SEF708Y

INSPECTION AND ADJUSTMENT
EC-1043
< BASIC INSPECTION >[K9K]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
INSPECTION AND ADJUSTMENT
BASIC INSPECTION
BASIC INSPECTION : DescriptionINFOID:0000000001162514
NOTE:
Only consult the tests after following the diagnostic procedure chart.
Some specific checks are grouped under the “tests” heading and are used as required in different diagnostic
charts.
BASIC INSPECTION : Special Repair Requirement (TEST 1: Low Pressure Fuel Sup-
ply System Check)
INFOID:0000000001162515
NOTE:
CAUSE
- No fuel can be seen in the transparent supply pipe leading to the pump or large air bubbles can be seen
(small air bubbles are permitted).
- engine does not start.
1.CHECK CONFORMITY
Check the conformity and presence of the fuel (gasoline instead of diesel, contaminated fuel).
Is the inspection result normal?
Yes >> GO TO 2.
No >> Bleed the fuel supply system with the manual priming pump.
Basic test Trouble diagnosis Reference page
Low pressure fuel supply system check TEST 1EC-1043, "
BASIC INSPEC-
TION : Special Repair Re-
quirement (TEST 1: Low
Pressure Fuel Supply System
Check)"
Internal fuel transfer pump check TEST 2EC-1044, "
BASIC INSPEC-
TION : Special Repair Re-
quirement (TEST 2: Internal
Fuel Transfer Pump Check)"
High pressure supply pump (Pressure control valve) check TEST 3EC-1044, "
BASIC INSPEC-
TION : Special Repair Re-
quirement [TEST 3: High
Pressure Supply Pump (Pres-
sure Control Valve) Check]"
High pressure supply pump (Volumetric control valve) check TEST 4EC-1045, "
BASIC INSPEC-
TION : Special Repair Re-
quirement [TEST 4: High
Pressure Supply Pump (Volu-
metric Control Valve) Check]"
Rail high pressure regulation check TEST 5EC-1048, "
BASIC INSPEC-
TION : Special Repair Re-
quirement (TEST 5: Rail High
Pressure Regulation Check)"
Major leak in fuel injectors/fuel injectors open TEST 6EC-1052, "
BASIC INSPEC-
TION : Special Repair Re-
quirement (TEST 6: Major
Leak in Fuel Injectors/Fuel In-
jectors Open)"
Incorrect fuel injection quantity TEST 7EC-1053, "
BASIC INSPEC-
TION : Special Repair Re-
quirement (TEST 7: Incorrect
Fuel Injection Quantity)"

EC-1044
< BASIC INSPECTION >[K9K]
INSPECTION AND ADJUSTMENT
2.CHECK FUEL CIRCUIT
Does the fuel circulate correctly when pumped manually?
Ye s o r N o
Ye s > > G O T O 5 .
No >> GO TO 3.
3.CHECK FOR LEAK
Look for leaks on the unions.
Are there leaks in the hoses and unions?
Yes >> Carry out the required repairs.
No >> GO TO 4.
4.CHECK FUEL FILTER
Check the correctness of the fuel filter.
Is the fuel filter correct?
Ye s > > G O T O 5 .
No >> Replace the fuel filter with a genuine part.
5.INSPECTION END
Low pressure circuit OK.
>>INSPECTION END
BASIC INSPECTION : Special Repair Requirement (TEST 2: Internal Fuel Transfer
Pump Check)
INFOID:0000000001162516
NOTE:
CONDITIONS PRIOR TO TEST
- Test 1 Low pressure fuel supply system check has been carried out previously and results are satisfactory.
CAUSE
- Fuel can be seen in the transparent supply pipe leading to the pump.
- However, fuel does not move during starting.
1.CHECK INTERNAL FUEL TRANSFER PUMP
1. Disconnect high pressure supply pump (volumetric control valve) harness connector
2. Remove fuel return pipe from the pump and block it so that it is sealed. Connect a pipe to the pump to
measure the flow of diesel.
3. To authorise a 15 second cranking engine and carry out this test it is essential to carry out the following
procedure: measure the flow of diesel.
- Turn ignition switch ON.
- Perform “SAVE DATA FOR CPU REPLC” in WORK SUPPORT mode with CONSULT-III.
- Perform “PRGRM REINITIALIZE” in WORK SUPPORT mode with CONSULT-III.
- Cranking engine for at least 15 seconds (starting speed 250 rpm)
- Check the flow rate of the fuel being collected in a graduated measuring cylinder (500 ml minimum).The
minimum flow rate must be 25 ml every 15 sec.
- Perform “WRT DATA AFTR REPLC CPU” in WORK SUPPORT mode with CONSULT-III.
Does the flow measure less than 25ml?
Yes >> Replace high pressure supply pump.
No >> GO TO 2.
2.INSPECTION END
Low pressure system OK.
>>INSPECTION END
BASIC INSPECTION : Special Repair Requirement [TEST 3: High Pressure Supply

EC-1046
< BASIC INSPECTION >[K9K]
INSPECTION AND ADJUSTMENT
Pump (Volumetric Control Valve) Check]
INFOID:0000000001162518
NOTE:
CONDITIONS PRIOR TO TEST
- The entire low pressure system must be in good condition.
- Check the sealing of the high pressure pipes and unions.
CAUSE
- Not enough or no rail pressure during starting.
- Rail reference pressure during starting, minimum 15 000 kPa (150 bar, 153 kg/cm
2, 2175 psi).
1.CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE)-I
Refer to EC-1110, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 2
NO >> Replace high pressure supply pump.
2.CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE)-II
 Reconnect all harness connectors disconnected.
 Turn ignition switch ON.
 Select “DATA MONITOR” mode with CONSULT-III.
 Check that the “FUEL FLOW S/V CU” indication when the cranking engine.
Is the excitation current between 0.6 - 1.0A?
YES >> GO TO 6.
NO >> GO TO 3.
3.CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE) POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect high pressure supply pump (volumetric control valve) harness connector.
3. Turn ignition switch ON.
4. Check the voltage between high pressure supply pump (volumetric control valve) harness connector and
ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
 IPDM E/R
 Harness for open or short between ECM and high pressure supply pump (volumetric control valve)
 Harness for open or short between IPDM E/R and high pressure supply pump (volumetric control valve)
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE) OUTPUT SIGNAL CIR-
CUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between high pressure supply pump (volumetric control valve) harness connector
and ECM harness connector.
High pressure supply pump
(volumetric control valve)
Ground Voltage
Connector Terminal
F54 1 Ground Battery voltage

EC-1048
< BASIC INSPECTION >[K9K]
INSPECTION AND ADJUSTMENT
>>INSPECTION END
BASIC INSPECTION : Special Repair Requirement (TEST 5: Rail High Pressure Reg-
ulation Check)
INFOID:0000000001162519
NOTE:
 If contaminants (swarf) can be seen in the transparent return pipe, the entire fuel injection system (fuel injec-
tors, pump, rail, high pressure pipes and all return pipes) must be replaced.
CONDITIONS PRIOR TO TEST
- Engine coolant temperature between 80 - 90°C (176 - 194°F).
- All the electrical load are switched off.
- Air conditioning is switched off.
- The tank is at least half-full.
- The pipe connections and unions have been checked.
- Check the sealing of the high pressure pipes and unions.
CAUSE
- Rail pressure variations around the setpoint.
- The rail reference pressure is not reached.
- Rough idle.
- Possibly noisy combustion.
1.CHECK AIR BUBBLES
1. Start engine
2. Are there large air bubbles in the transparent supply pipe going to the pump?
Is the inspection result normal?
YES >> Check low pressure system.
NO >> GO TO 2.
2.CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE)-I
Disconnect high pressure supply pump (volumetric control valve) harness connector.
Does the engine stop?
YES >> GO TO 3.
NO >> Replace high pressure supply pump (the high pressure supply pump [volumetric control valve]
remains open mechanically).
3.CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE)-I
1. Reconnect high pressure supply pump (volumetric control valve) harness connector.
2. Turn ignition switch OFF and wait at least 30 seconds.
3. Start engine.
4. Disconnect high pressure supply pump (pressure control valve) harness connector.
Does the engine stop?
YES >> GO TO 4.
NO >> Replace high pressure supply pump (the high pressure supply pump [pressure control valve]
remains open mechanically).
4.CHECK FUEL INJECTOR
1. Reconnect high pressure supply pump (pressure control valve) harness connector.
2. Wait at least 30 seconds.
3. Start engine and let it idle speed.
4. Select “DATA MONITOR” mode with CONSULT-III.
5. Check that the “F/FLOW CORR CYL1”, “F/FLOW CORR CYL2”, “F/FLOW CORR CYL3”, “F/FLOW
CORR CYL4” indication.
Are the reference value 0.3 - 1.9?
YES >> GO TO 6.
NO >> GO TO 5.
5.CHECK MAJOR LEAK IN FUEL INJECTOR/FUEL INJECTORS OPEN
Carry out TEST 6.

EC-1052
< BASIC INSPECTION >[K9K]
INSPECTION AND ADJUSTMENT
2. Start engine and let it idle speed.
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Check that the “RAIL PRESSURE” indication under the following conditions.
NOTE:
An unusual combustion noise may be heard.
Is the inspection result normal?
YES >> GO TO 22.
NO >> GO TO 21.
21.CHECK FUEL RAIL PRESSURE-II
1. Turn ignition switch OFF.
2. Replace fuel rail. Refer to EM-281, "
Removal and Installation"
3. Start engine and let it idle speed.
4. Select “DATA MONITOR” mode with CONSULT-III.
5. Check that the “RAIL PRESSURE” indication under the following conditions.
NOTE:
An unusual combustion noise may be heard.
Is the inspection result normal?
YES >> GO TO 22.
NO >> Replace high pressure supply pump.
22.INSPECTION END
High pressure supply pump (volumetric control valve) OK.
>>INSPECTION END
BASIC INSPECTION : Special Repair Requirement (TEST 6: Major Leak in Fuel Injec-
tors/Fuel Injectors Open)
INFOID:0000000001162520
NOTE:
CONDITIONS PRIOR TO TEST
- The entire low pressure system must be in good condition.
- Check the sealing of the high pressure pipes and unions.
- Test 3 High pressure supply pump (pressure control valve) check is OK
- Test 4 High pressure supply pump (volumetric control valve) check is OK
- Test 5 Rail high pressure regulation circuit check is OK.
CAUSE
- Not enough or no rail pressure during starting.
- The engine does not start.
1.CHECK FUEL INJECTOR-I
Refer to EC-1141, "
Component Inspection".
Is the inspection result normal?
CONDITION (ENGINE SPEED) INDICATION
At idle speed 190 - 210 bar
2000 rpm 400 - 500 bar
3000 rpm 500 - 700 bar
4000 rpm 700 - 900 bar
CONDITION (ENGINE SPEED) INDICATION
At idle speed 190 - 210 bar
2000 rpm 400 - 500 bar
3000 rpm 500 - 700 bar
4000 rpm 700 - 900 bar

INSPECTION AND ADJUSTMENT
EC-1053
< BASIC INSPECTION >[K9K]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
YES >> GO TO 2.
NO >> Replace malfunctioning fuel injector.
2.CHECK INTERNAL FUEL TRANSFER PUMP
1. Turn ignition switch OFF.
2. Disconnect the return system connections at the fuel injectors and close off the return pipes so they are
leak-tight.
3. To authorise a 15 second cranking engine and carry out this test it is essential to carry out the following
procedure:
- Disconnect high pressure supply pump (volumetric control valve) harness connector
- Turn ignition switch ON.
- Perform “SAVE DATA FOR CPU REPLC” in WORK SUPPORT mode with CONSULT-III.
- Perform “PRGRM REINITIALIZE” in WORK SUPPORT mode with CONSULT-III.
- Cranking engine for at least 15 seconds (starting speed 250 rpm)
- Perform “WRT DATA AFTR REPLC CPU” in WORK SUPPORT mode with CONSULT-III.
Is the return volume at the fuel injectors more than 20 ml per fuel injector for the starting phase?
NOTE:
 Do not repeat this procedure more than 3 times and wait 30 seconds between each 15 second cranking
engine.
 Then wait 30 minutes before cranking the engine for 3 15 second cycles.
 Follow this instruction so that the starter does not get damaged.
Does the flow measure more than 20ml?
Yes >> Replace malfunctioning fuel injector.
No >> GO TO 3.
3.CHECK FUEL INJECTOR-II
1. Turn ignition switch OFF.
2. Reconnect return pipes.
3. Start Engine.
4. Select “DATA MONITOR” mode with CONSULT-III.
5. Check “RAIL PRESSURE” and “RAIL PRES SET” indication.
6. Does “RAIL PRESSURE” follow “RAIL PRES SET” during the 3 second cranking engine?
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK GLOW PLUG
1. Turn ignition switch OFF.
2. Remove the glow plugs and check for moisture.
3. If the glow plugs are wet with fuel, it is possible that the fuel injector is leaking.
Are the glow plugs wet with fuel?
Yes >> Replace malfunction fuel injector.
No >> Replace high pressure supply pump.
5.INSPECTION END
Fuel injector system OK.
>>INSPECTION END
BASIC INSPECTION : Special Repair Requirement (TEST 7: Incorrect Fuel Injection
Quantity)
INFOID:0000000001162521
NOTE:
CONDITIONS PRIOR TO TEST
- The entire low pressure system must be in good condition.
- Check the sealing of the high pressure pipes and unions.
- Test 3 High pressure supply pump (pressure control valve) check is OK
- Test 4 High pressure supply pump (volumetric control valve) check is OK
- Test 5 Rail high pressure regulation circuit check is OK.