2007 NISSAN TIIDA Cooling

EC-988
< COMPONENT DIAGNOSIS >[MR18DE]
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
DescriptionINFOID:0000000001161987
The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an
electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.
Component Function CheckINFOID:0000000001161988
1.CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check the voltage between ECM harness connector terminals as follows.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-988, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001161989
1.CHECK GROUND CONNECTION
1. Turn A/C switch and blower fan switch OFF.
2. Stop engine.
3. Turn ignition switch OFF.
4. Check ground connection E15. Refer to Ground Inspection in GI-58, "
Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between refrigerant pressure sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
PBIB2657E
(+) (–)
Voltage
Connector Terminal Connector Terminal
F1141
(Refrigerant pressure sensor signal)F11 48 1.0 - 4.0V
Refrigerant pressure sensor
Ground Voltage
Connector Terminal
E17 3 Ground Approx. 5V

ECM
EC-991
< ECU DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
AIR COND SIG Engine: After warming up, idle the
engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
P/N POSI SW  Ignition switch: ONShift lever: Neutral ON
Selector lever: Except above OFF
PW/ST SIGNAL Engine: After warming up, idle the
engineSteering wheel: Not being turned OFF
Steering wheel: Being turned ON
LOAD SIGNAL  Ignition switch: ONRear window defogger switch: ON
and/or Lighting switch: 2nd positionON
Rear window defogger switch and lighting
switch: OFFOFF
IGNITION SW  Ignition switch: ON → OFF → ON ON → OFF → ON
HEATER FAN SW Engine: After warming up, idle the
engineHeater fan switch: ON ON
Heater fan switch: OFF OFF
BRAKE SW  Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
INJ PULSE-B1 Engine: After warming up
 Shift lever:Neutral
 Air conditioner switch: OFF
No loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING Engine: After warming up
 Shift lever:Neutral
 Air conditioner switch: OFF
No loadIdle 10° - 20° BTDC
2,000 rpm 25° - 45° BTDC
PURG VOL C/V Engine: After warming up
 Shift lever:Neutral
 Air conditioner switch: OFF
No loadIdle 0%
2,000 rpm 20% - 90%
INT/V TIM (B1) Engine: After warming up
 Shift lever:Neutral
 Air conditioner switch: OFF
No loadIdle−5° - 5°CA
2,000 rpm Approx. 0° - 20°CA
INT/V SOL (B1) Engine: After warming up
 Shift lever:Neutral
 Air conditioner switch: OFF
No loadIdle 0%
2,000 rpm Approx. 0% - 60%
AIR COND RLY Engine: After warming up, idle the
engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates)ON
FUEL PUMP RLY For 1 seconds after turning ignition switch: ON
 Engine running or crankingON
 Except above OFF
THRTL RELAY  Ignition switch: ON ON
COOLING FAN Engine: After warming up, idle the
engine
 Air conditioner switch: OFFEngine coolant temperature is 97 °C
(207°F) or less.OFF
Engine coolant temperature is between
98°C (208°F) and 99°C (210°F)LOW
Engine coolant temperature is 100°C
(212°F) or moreHIGH
HO2S1 HTR (B1) Engine: After warming up
 Engine speed: Above 3,600 rpmON
Engine speed: Above 3,600 rpm OFF Monitor Item Condition Values/Status

EC-1018
< ECU DIAGNOSIS >[MR18DE]
ECM
DTC RELATED ITEM
Engine operating condi-
tion in fail-safe modeDetected items RemarksReference
page
Engine speed will not
rise more than 2,500 rpm
due to the fuel cutMalfunction indicator
circuitWhen there is an open circuit on MI circuit, the ECM cannot warn the
driver by lighting up MI when there is malfunction on engine control
system.
Therefore, when electrical controlled throttle and part of ECM related
diagnoses are continuously detected as NG for 5 trips, ECM warns the
driver that engine control system malfunctions and MI circuit is open by
means of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MI
circuit are detected and demands the driver to repair the malfunction.EC-986
DTC No. Detected items Engine operating condition in fail-safe mode
P0011 Intake valve timing control The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
P0102
P0103Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the time after following
condition.
CONSULT-III displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-III display)
Just as ignition switch is turned ON
or START40°C (104°F)
Approx. 4 minutes after engine
stating80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
P0500 Vehicle speed sensor When the fail-safe system for vehicle speed sensor is activated, the cooling fan operates
(Highest) while engine is running.
P0605 ECM (When ECM calculation function is malfunctioning:)
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
ECM deactivates ASCD operation.
P1121 Electric throttle control ac-
tuator(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops, the
engine stalls.
The engine can restart in Neutral position, and engine speed will not exceed 1,000 rpm or
more.
P1122 Electric throttle control
functionECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

ENGINE CONTROL SYSTEM
EC-1027
< SYMPTOM DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
1 - 6: The numbers refer to the order of inspection.Exhaust Exhaust manifold/Tube/Muffler/
Gasket
55555 55 5EX-5
, EX-9
Three way catalyst
Lubrica-
tionOil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil cooler
55555 55 5EM-166
,
LU-18
, LU-
19
Oil level (Low)/Filthy oilLU-15
Cooling Radiator/Hose/Radiator filler cap
55555 55 45CO-40
Thermostat 5CO-45
Water pumpCO-44
Water galleryCO-28
Cooling fan
5CO-43
Coolant level (Low)/Contaminat-
ed coolantCO-35
NATS (NISSAN Anti-Theft System) 1 1SEC-7
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code A
AAB AC AD AE AF AG AH AJ AK AL AM HA

EC-1054
< BASIC INSPECTION >[K9K]
INSPECTION AND ADJUSTMENT
- All the electrical loads are switched off.
- Air conditioning is switched off.
CAUSE
- The engine runs poorly at idle speed, possibly emits white smoke.
1.CHECK FUEL INJECTOR
Refer to EC-1141, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace malfunctioning fuel injector.
2.CHECK ENGINE COOLANT TEMPERATURE AND FUEL TEMPERATURE
1. Start engine let it idle speed.
2. Select “DATA MONITOR” mode with CONSULT-III.
3. Check “FUEL TEMP” indication is above 60°C (140°F)
4. Check “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 3.
NO >> GO TO 4.
3.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. While the engine is idling, check the return flow rate at the fuel injector. After 5 minutes the
return volume must be between 16 - 24 ml per fuel injector.
Is there more than 24 ml or less than 16 ml of return for each fuel injector?
Yes >> Replace malfunctioning fuel injector.
No >> INSPECTION END
4.CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM-267, "
Inspection".
>> INSPECTION END
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description
INFOID:0000000001162522
When replacing ECM, this procedure must be performed.
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000001162523
1.PRECONDITIONING
 Connect a CONSULT-III
 Connect a battery charger
 Electric load switch is OFF
 Wait for the engine to cool [engine coolant temperature < 60°C (140°F and air temperature < 50°C (122°F)].
NOTE:
While the ECM is being programmed the cooling fan motors are triggered automatically.
>> GO TO 2.
2.SAVE ECM DATA
Turn ignition switch ON.
Perform “SAVE DATA FOR CPU REPLC” in WORK SUPPORT mode with CONSULT-III.

EC-1062
< FUNCTION DIAGNOSIS >[K9K]
ENGINE CONTROL SYSTEM
Component Description
INFOID:0000000001162529
1. ASCD steering switch 2. ASCD switch 3. CANCEL switch
4. RESUME switch 5. SET - switch 6. SET + switch
7. Stop lamp switch 8. Brake pedal 9. ASCD clutch switch
10. Clutch pedal
AWBIA0056ZZ
Component Reference
Accelerator pedal position sensorEC-1191, "
Description"
ASCD steering switchEC-1174, "Description"
ASCD clutch switchEC-1208, "Description"
Cooling fan motorEC-1211, "Description"
Electric throttle control actuatorEC-1134, "Description"
Engine coolant temperature sensorEC-1132, "Description"
Fuel pump temperature sensorEC-1136, "Description"
Fuel rail pressure sensorEC-1138, "Description"
Intake air temperature sensorEC-1130, "Description"
Mass air flow sensorEC-1127, "Description"
Refrigerant pressure sensorEC-1166, "Description"
Stop lamp switchEC-1214, "Description"
Throttle control motorEC-1134, "Description"
Throttle position sensorEC-1134, "Description"
Turbocharger boost sensorEC-1147, "Description"
Vehicle speed sensorEC-1165, "Description"

COOLING FAN CONTROL
EC-1097
< FUNCTION DIAGNOSIS >[K9K]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
COOLING FAN CONTROL
System DescriptionINFOID:0000000001162544
The cooling fan motor is controlled by the ECM.
COOLING FAN OPERATION WITH THE ENGINE RUNNING
Cooling fan operate is guaranteed by a 2-speed fan assembly (LOW speed and HIGH speed).The ECM
requests the IPDM E/R to actuate them via the can communication. To provide cooling:
 Engine running
- LOW speed is actuated when the engine coolant temperature exceeds 96 °C (205°F) and is deactivated
when it drops below 94 °C (201°F).
- HIGH speed is actuated when the engine coolant temperature exceeds 104 °C (219°F) and is deactivated
when it drops below 102 °C (216°F).
 If the engine coolant temperature exceeds the threshold of 115°C (239°F), the ECM requests the IPDM E/R,
via the CAN communication, to switch off the air conditioning compressor so as to reduce the load on the
engine and attempt to limit the rise in temperature. The cut-off request is cancelled if the engine coolant tem-
perature drops below 110°C (230°F).
 If a malfunction in the engine coolant temperature sensor circuit is detected, the ECM requests that HIGH
speed operation.
 In addition to engine management, the ECM centralises the cooling requirements for the climate control and
automatic transmission/sequential gearbox functions (where fitted).

EC-1098
< FUNCTION DIAGNOSIS >[K9K]
COOLING FAN CONTROL
Component Parts Location
INFOID:0000000001611150
1. Priming pump 2. Fuel pump 3. Glow plug
4. Fuel rail 5. Turbocharger boost control solenoid
valve6. Turbocharger boost sensor
7. Engine coolant temperature sensor 8. Crankshaft position sensor 9. Glow relay
10. ECM 11. Mass air flow sensor 12. Electric throttle control actuator
13. Camshaft position sensor 14. EGR volume control valve 15. Fuel injector
ALBIA0296ZZ