2007 NISSAN TIIDA Engine Control

EC-956
< COMPONENT DIAGNOSIS >[MR18DE]
P2135 TP SENSOR
P2135 TP SENSOR
DescriptionINFOID:0000000001161943
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.
DTC LogicINFOID:0000000001161944
DTC DETECTION LOGIC
NOTE:
If DTC P2135 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. Refer to
EC-928, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-956, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001161945
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. 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 THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness connector.
PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2135Throttle position sensor
circuit range/perfor-
manceRationally incorrect voltage is sent to ECM
compared with the signals from TP sensor 1
and TP sensor 2. Harness or connector
(TP sensor 1 and 2 circuit is open or
shorted.)
 Electric throttle control actuator
(TP sensor 1 and 2)

P2138 APP SENSOR
EC-959
< COMPONENT DIAGNOSIS >[MR18DE]
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P2138 APP SENSOR
DescriptionINFOID:0000000001161948
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine oper-
ation such as fuel cut.
DTC LogicINFOID:0000000001161949
DTC DETECTION LOGIC
NOTE:
If DTC P2138 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. Refer to
EC-928, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-959, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001161950
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
PBIB1741E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2138Accelerator pedal posi-
tion sensor circuit range/
performanceRationally incorrect voltage is sent to ECM
compared with the signals from APP sensor 1
and APP sensor 2. Harness or connector
(APP sensor 1 and 2 circuit is open or
shorted.)
[Crankshaft position sensor (POS) circuit
is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
 Accelerator pedal position sensor
(APP sensor 1 and 2)
 Crankshaft position sensor (POS)
 Refrigerant pressure sensor

COOLING FAN
EC-969
< COMPONENT DIAGNOSIS >[MR18DE]
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COOLING FAN
DescriptionINFOID:0000000001161961
Cooling fan operates at each speed when the current flows in the cooling fan motor as follows.
Refer to EC-737, "
System Diagram" for cooling fan operation.
Component Function CheckINFOID:0000000001161962
1.CHECK COOLING FAN LOW SPEED FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III and touch “LOW” on the CON-
SULT-III screen.
3. Make sure that cooling fans operates at low speed.
Without CONSULT-III
1. Start engine and let it idle.
2. Turn air conditioner switch and blower fan switch ON.
3. Make sure that cooling fan operates at low speed.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Check cooling fan low speed control circuit. Refer to EC-969, "
Diagnosis Procedure".
2.CHECK COOLING FAN HIGH SPEED FUNCTION
With CONSULT-III
1. Touch “HI” on the CONSULT-III screen.
2. Make sure that cooling fans operates at higher speed than low speed.
Without CONSULT-III
1. Perform IPDM E/R auto active test and check cooling fan motors operation.
2. Make sure that cooling fan operates at high speed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Check cooling fan high speed control circuit. Refer to EC-969, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001161963
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES-2 >> With A/C models: GO TO 3.
YES-2 >> Without A/C models: GO TO 5.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
 50A fusible link (letter J)(with A/C models)
 40A fusible link (letter J)(without A/C models)
 Harness for open or short between IPDM E/R and battery
IPDM E/R
Ground Continuity
Connector Terminal
E44 22 Ground Existed

FUEL INJECTOR
EC-975
< COMPONENT DIAGNOSIS >[MR18DE]
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FUEL INJECTOR
DescriptionINFOID:0000000001161969
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
Component Function CheckINFOID:0000000001161970
1.INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
YES >> GO TO 2.
NO >> Go to EC-975, "
Diagnosis Procedure".
2.CHECK FUEL INJECTOR FUNCTION
With CONSULT-III
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Let engine idle.
2. Listen to each fuel injector operating sound.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-975, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001161971
1.CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
4. Check the voltage between fuel injector harness connector and ground.
PBIA9664J
Clicking noise should be heard.
PBIB3332E

EC-978
< COMPONENT DIAGNOSIS >[MR18DE]
FUEL PUMP
FUEL PUMP
DescriptionINFOID:0000000001161973
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when
the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.
Component Function CheckINFOID:0000000001161974
1.CHECK FUEL PUMP FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.
Is the inspection result normal?
YES >> INSPECTION END
NO >>EC-978, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001161975
1.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ECM harness connector terminals as follows.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2.
2.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
Sensor Input signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump controlFuel pump relay
↓
Fuel pump
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stopped Stops in 1.5 seconds.
Except as shown aboveStops.
Fuel pressure pulsation should be felt on the fuel feed
hose for 1 second after ignition switch is turned ON.
JMBIA0351ZZ
(+) (–)
Voltag e
Connector Terminal Connector Terminal
F10 23 E16 108 Battery voltage

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-993
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TERMINAL LAYOUT
PHYSICAL VALUES
NOTE:
 ECM is located in the engine room left side near battery.
- Use extreme care not to 2 pins at one time.
- Data is for comparison and may not be exact.
 Specification data are reference values and are measured between each terminal and ground.
 Pulse signal is measured by CONSULT-III.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
PBIA9221J
Terminal No. Description
ConditionVa l u e
(Approx.)
+ -– Signal nameInput/
Output
1
(L)108
(B)Throttle control motor
(Open)Output[Ignition switch: ON]
 Engine stopped
 Shift lever: 1st
 Accelerator pedal: Fully depressed3.2V
2
(SB)108
(B)Throttle control motor re-
lay power supplyInput [Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
3
(G)56
(B)Heated oxygen sensor 1
heaterOutput[Engine is running]
 Warm-up condition
 Engine speed: Below 3,600 rpm2.9 - 8.8V
[Ignition switch: ON]
 Engine stopped
[Engine is running]
 Engine speed: below 3,600 rpmBATTERY VOLTAGE
(11-14V)
4
(P)108
(B)Throttle control motor
(Close)Output[Ignition switch: ON]
 Engine stopped
 Shift lever:1st
 Accelerator pedal: Fully released1.8V
JMBIA0324GB
JMBIA0325GB
JMBIA0326GB

EC-994
< ECU DIAGNOSIS >[MR18DE]
ECM
5
(G)59
(O)Heated oxygen sensor 2
heaterOutput[Engine is running]
 Engine speed: Below 3,600 rpm af-
ter the following conditions are met
- Engine: after warming up
- Keeping the engine speed between
3,500 and 4,000 rpm for 1 minute
and at idle for 1 minute under no
load10V
[Ignition switch: ON]
 Engine stopped
[Engine is running]
 Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
9
(P)108
(B)EVAP canister purge vol-
ume control solenoid
valveOutput[Engine is running]
 Idle speed
 Accelerator pedal: Not depressed
even slightly, after engine startingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
 Engine speed: About 2,000 rpm
(More than 100 seconds after start-
ing engine.)10V
10
(B)
11
(B)— ECM ground — — —
15
(Y)108
(B)Throttle control motor re-
layOutput[Ignition switch: OFF]BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON] 0 - 1.0V
17
(R)
108
(B)Ignition signal No. 1
Output[Engine is running]
 Warm-up condition
 Idle speed
NOTE:
The pulse cycle changes depending
on rpm at idle0 - 0.3V
18
(LG)Ignition signal No. 2
21
(G)Ignition signal No. 4
[Engine is running]
 Warm-up condition
 Engine speed: 2,000 rpm0.2 - 0.5V
22
(SB)Ignition signal No. 3 Terminal No. Description
ConditionVa l u e
(Approx.)
+-– Signal nameInput/
Output
JMBIA0325GB
JMBIA0327GB
JMBIA0328GB
JMBIA0329GB
JMBIA0330GB