refrigerant type NISSAN TIIDA 2009 Service User Guide

DTC P2127, P2128 APP SENSOR
EC-947
< SERVICE INFOMATION >
[MR TYPE 1] C
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DTC P2127, P2128 APP SENSOR
Component Description INFOID:0000000004537481
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 accelerato r pedal is determined by the ECM
receiving the signal from the accelerator pedal positi on sensor. The ECM uses this signal for the engine oper-
ation such as fuel cut.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004537482
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
On Board Diagnosis Logic INFOID:0000000004537483
These self-diagnoses have the on e trip detection logic.
FAIL-SAFE MODE When the malfunction is detected, ECM ent ers fail-safe mode and the MIL lights up. PBIB1741E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN 1 • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.6 - 0.9V
Accelerator pedal: Fully depressed 4.0 - 4.8V
ACCEL SEN 2* • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.6 - 0.9V
Accelerator pedal: Fully depressed 3.9 - 4.8V
CLSD THL POS • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2127
2127 Accelerator pedal position
sensor 2 circuit low input An excessively low
voltage from the APP
sensor 2 is sent to ECM. • Harness or connectors
(APP sensor 2 circuit is open or shorted.)
[Crankshaft position sensor (POS) circuit
is shorted.]
(EVAP control system pressure sensor
circuit is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
• EVAP control system pressure sensor
• Accelerator pedal position sensor (APP sensor 2)
• Crankshaft position sensor (POS)
• Refrigerant pressure sensor
P2128
2128 Accelerator pedal position
sensor 2 circuit high input An excessively high
voltage from the APP
sensor 2 is sent to ECM. Engine operating condition in fail-safe mode
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.

EC-950< SERVICE INFOMATION >
[MR TYPE 1]
DTC P2127, P2128 APP SENSOR
Diagnosis Procedure INFOID:00000000045374861.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to EC-632, " Ground Inspection " .
TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
74 W Sensor power supply
(Refrigerant pressure sen-
sor) [Ignition switch: ON]
Approximately 5V
75 BR Sensor power supply
[Crankshaft position sensor
(POS)] [Ignition switch: ON]
Approximately 5V
76 W EVAP control system pres-
sure sensor power supply [Ignition switch: ON]
Approximately 5V
102 SB Sensor power supply
(APP sensor 2) [Ignition switch: ON]
Approximately 5V
103 GR Accelerator pedal position
sensor 2 [Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released 0.3 - 0.6V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed 1.95 - 2.4V
104 Y Sensor ground
(APP sensor 2) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
106 P Sensor power supply
(APP sensor 1) [Ignition switch: ON]
Approximately 5V
110 G Accelerator pedal position
sensor 1 [Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released 0.6 - 0.9V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed 3.9 - 4.7V
111 R Sensor ground
(APP sensor 1) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E

DTC P2127, P2128 APP SENSOR
EC-951
< SERVICE INFOMATION >
[MR TYPE 1] C
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OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. 2.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Disconnect accelerator pedal position (APP) sensor (1) harness connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 5 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 6.
NG >> GO TO 3. 3.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 5 and ECM terminal 102.
Refer to Wiring Diagram.
OK or NG OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 4.
CHECK COMPONENTS POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
OK or NG OK >> GO TO 5.
NG >> Repair short to ground or short to power in harness or connectors. 5.
CHECK COMPONENTS
Check the following.
• Crankshaft position sensor (POS) (Refer to EC-780, " Component Inspection " .)
• EVAP control system pressure sensor (Refer to EC-831, " Component Inspection " .) BBIA0705E
Voltage: Approximately 5V
PBIA9607J
Continuity should exist.
ECM terminal Sensor terminal Reference Wiring Diagram 74 Refrigerant pressure sensor terminal 3 EC-1006, " Wiring Diagram "
75 Crankshaft position sensor (POS) terminal 1
EC-776, " Wiring Diagram "
76 EVAP control system pressure sensor terminal 3
EC-834, " Wiring Diagram "
102 APP sensor terminal 5
EC-949, " Wiring Diagram "

DTC P2138 APP SENSOR
EC-959
< SERVICE INFOMATION >
[MR TYPE 1] C
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DTC P2138 APP SENSOR
Component Description INFOID:0000000004537497
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 accelerato r pedal is determined by the ECM
receiving the signal from the accelerator pedal positi on sensor. The ECM uses this signal for the engine oper-
ation such as fuel cut.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004537498
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
On Board Diagnosis Logic INFOID:0000000004537499
This self-diagnosis has the on e trip detection logic.
NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-874 .
FAIL-SAFE MODE When the malfunction is detected, ECM ent ers fail-safe mode and the MIL lights up. PBIB1741E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN 1 • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.6 - 0.9V
Accelerator pedal: Fully depressed 4.0 - 4.8V
ACCEL SEN 2* • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.6 - 0.9V
Accelerator pedal: Fully depressed 3.9 - 4.8V
CLSD THL POS • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2138
2138 Accelerator
pedal posi-
tion sensor circuit range/
performance Rationally 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.]
(EVAP control system pressure sensor
circuit is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
• Accelerator pedal position sensor (APP sensor 1 and 2)
• Crankshaft position sensor (POS)
• EVAP control system pressure sensor
• Refrigerant pressure sensor

EC-962< SERVICE INFOMATION >
[MR TYPE 1]
DTC P2138 APP SENSOR
Diagnosis Procedure INFOID:00000000045375021.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to EC-632, " Ground Inspection " .
TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
74 W Sensor power supply
(Refrigerant pressure sen-
sor) [Ignition switch: ON]
Approximately 5V
75 BR Sensor power supply
[Crankshaft position sensor
(POS)] [Ignition switch: ON]
Approximately 5V
76 W EVAP control system pres-
sure sensor power supply [Ignition switch: ON]
Approximately 5V
102 SB Sensor power supply
(APP sensor 2) [Ignition switch: ON]
Approximately 5V
103 GR Accelerator pedal position
sensor 2 [Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released 0.3 - 0.6V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed 1.95 - 2.4V
104 Y Sensor ground
(APP sensor 2) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
106 P Sensor power supply
(APP sensor 1) [Ignition switch: ON]
Approximately 5V
110 G Accelerator pedal position
sensor 1 [Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released 0.6 - 0.9V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed 3.9 - 4.7V
111 R Sensor ground
(APP sensor 1) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E

EC-1006< SERVICE INFOMATION >
[MR TYPE 1]
REFRIGERANT PRESSURE SENSOR
Wiring Diagram INFOID:0000000004537541
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground. BBWA2662E

REFRIGERANT PRESSURE SENSOR
EC-1007
< SERVICE INFOMATION >
[MR TYPE 1] C
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Diagnosis Procedure
INFOID:00000000045375421.
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 voltage between ECM terminal 41 and ground with CON- SULT-III or tester.
OK or NG OK >>
INSPECTION END
NG >> GO TO 2. 2.
CHECK GROUND CONNECTIONS
1. Turn A/C switch and blower fan switch OFF.
2. Stop engine and turn ignition switch OFF.
3. Loosen and retighten ground screw on the body. Refer to EC-632, " Ground Inspection " .
OK or NG OK >> GO TO 3.
NG >> Repair or replace ground connections. 3.
CHECK REFRIGERANT PRESSURE SE NSOR POWER SUPPLY CIRCUIT
TERMI-
NAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
41 GR Refrigerant pressure sensor [Engine is running]
• Warm-up condition
• Both A/C switch and blower fan switch: ON
(Compressor operates) 1.0 - 4.0V
48 BR Sensor ground
(Refrigerant pressure sensor) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
74 W Sensor power supply
(Refrigerant pressure sensor) [Ignition switch: ON]
Approximately 5VVoltage: 1.0 - 4.0V
PBIA9574J
:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E

EC-1008< SERVICE INFOMATION >
[MR TYPE 1]
REFRIGERANT PRESSURE SENSOR
1. Disconnect refrigerant pressure sensor (1) harness connector.
- : Vehicle front
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 3 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 5.
NG >> GO TO 4. 4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between refrigerant pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors. 5.
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 1 and ECM terminal 48.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 7.
NG >> GO TO 6. 6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between refrigerant pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors. 7.
CHECK REFRIGERANT PRESSURE SENSOR INPU T SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between refrigerant pressure sensor terminal 2 and ECM terminal 41. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG BBIA0713E
Voltage: Approximately 5V
SEF479Y
Continuity should exist.
Continuity should exist.

EC-1100< SERVICE INFOMATION >
[MR TYPE 2]
TROUBLE DIAGNOSIS
Engine Control Comp onent Parts Location INFOID:0000000004499941
1. Ignition coil (with power transistor) and spark plug 2. Intake valve timing control solenoid
valve 3. Refrigerant pressure sensor
4. Knock sensor 5. Fuel injector 6. Cooling fan motor
7. Camshaft position sensor (PHASE) 8. IPDM E/R 9. ECM
10. Mass air flow sensor (with intake air temperature sensor) 11. Engine coolant temperature sensor 12. Electric throttle control actuator
(with built-in throttle position sensor,
throttle control motor)
13. EVAP canister purge volume control solenoid valve PBIB3261E

TROUBLE DIAGNOSIS
EC-1101
< SERVICE INFOMATION >
[MR TYPE 2] C
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: Vehicle front
1. Mass air flow sensor (with intake air temperature sensor) 2. Engine coolant temperature sensor 3. Electric throttle control actuator
(with built in throttle position sensor,
throttle control motor)
4. PCV valve 5. Cooling fan motor 6. Resistor
7. Refrigerant pressure sensor BBIA0724E