Page 1145 of 4179
DTC P2138 APP SENSOR
EC-767
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS01131
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
Refer to EC-578, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
PBIB2021E
Page 1146 of 4179
EC-768
[QR (WITHOUT EURO-OBD)]
DTC P2138 APP SENSOR
2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness
connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 6 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
3. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
Check voltage between APP sensor terminal 4 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 8.
NG >> GO TO 4.
4. 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 4 and ECM terminal 91.
Refer to Wiring Diagram.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace open circuit.
PBIB0498E
Voltage: Approximately 5V
PBIB0914E
Voltage: Approximately 5V
PBIB0915E
Continuity should exist.
Page 1147 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual DTC P2138 APP SENSOR
EC-769
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
5. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the followi NISSAN X-TRAIL 2003 Service Repair Manual DTC P2138 APP SENSOR
EC-769
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
5. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the followi](/manual-img/5/57404/w960_57404-1146.png)
DTC P2138 APP SENSOR
EC-769
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
5. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.
OK or NG
OK >> GO TO 6.
NG >> Repair short to ground or short to power in harness or connectors.
6. CHECK THROTTLE POSITION SENSOR
Refer to EC-610, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> GO TO 7.
7. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-508, "
Throttle Valve Closed Position Learning" .
3. Perform EC-508, "
Idle Air Volume Learning" .
>>INSPECTION END
8. CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 3 and ECM terminal 82, APP sensor terminal 1
and ECM terminal 83.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between APP sensor terminal 5 and ECM terminal 106, APP sensor terminal 2
and ECM terminal 98.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
ECM terminal Sensor terminal Reference Wiring Diagram
91 APP sensor terminal 4EC-765
47 Electric throttle control actuator terminal 1EC-673
Continuity should exist.
Continuity should exist.
Page 1148 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual EC-770
[QR (WITHOUT EURO-OBD)]
DTC P2138 APP SENSOR
10. CHECK APP SENSOR
Refer to EC-770, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 . REPLACE ACCELERATOR PEDAL ASSEMBLY
NISSAN X-TRAIL 2003 Service Repair Manual EC-770
[QR (WITHOUT EURO-OBD)]
DTC P2138 APP SENSOR
10. CHECK APP SENSOR
Refer to EC-770, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 . REPLACE ACCELERATOR PEDAL ASSEMBLY](/manual-img/5/57404/w960_57404-1147.png)
EC-770
[QR (WITHOUT EURO-OBD)]
DTC P2138 APP SENSOR
10. CHECK APP SENSOR
Refer to EC-770, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 . REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform EC-507, "
Accelerator Pedal Released Position Learning" .
3. Perform EC-508, "
Throttle Valve Closed Position Learning" .
4. Perform EC-508, "
Idle Air Volume Learning" .
>>INSPECTION END
12. CHECK INTERMITTENT INCIDENT
Refer to EC-570, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS01132
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 106 (APP sensor 1 sig-
nal), 98 (APP sensor 2 signal) and ground under the following
conditions.
4. If NG, replace accelerator pedal assembly and go to the next
step.
5. Perform EC-507, "
Accelerator Pedal Released Position Learning" .
6. Perform EC-508, "
Throttle Valve Closed Position Learning" .
7. Perform EC-508, "
Idle Air Volume Learning" .
Removal and InstallationEBS01133
ACCELERATOR PEDAL
Refer to ACC-2, "ACCELERATOR CONTROL SYSTEM" .
Terminal Accelerator pedal Voltage
106
(Accelerator pedal position
sensor 1)Fully released 0.5 - 1.0V
Fully depressed 3.9 - 4.7V
98
(Accelerator pedal position
sensor 2)Fully released 0.15 - 0.6V
Fully depressed 1.95 - 2.4V
MBIB0023E
Page 1149 of 4179
HO2S1 HEATER
EC-771
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
HO2S1 HEATERPFP:22690
DescriptionEBS01134
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the heated oxygen sensor 1 heater corresponding to the engine
speed and engine coolant temperature. The duty percent varies with engine coolant temperature when engine
is started.
OPERATION
CONSULT-II Reference Value in Data Monitor ModeEBS01135
Specification data are reference values.
Sensor Input Signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)Engine speed
Heated oxygen sensor 1
heater controlHeated oxygen sensor 1
heater
Engine coolant temperature sensor Engine coolant temperature
Engine speed rpm Heated oxygen sensor 1 heater
Above 3,600 OFF
Below 3,600 ON
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 HTR (B1)
Engine: After warming up
Engine speed: Below 3,600 rpmON
Engine speed: Above 3,600 rpm OFF
Page 1150 of 4179
EC-772
[QR (WITHOUT EURO-OBD)]
HO2S1 HEATER
Wiring DiagramEBS01136
TBWA0643E
Page 1151 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual HO2S1 HEATER
EC-773
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-I NISSAN X-TRAIL 2003 Service Repair Manual HO2S1 HEATER
EC-773
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-I](/manual-img/5/57404/w960_57404-1150.png)
HO2S1 HEATER
EC-773
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureEBS01137
1. CHECK OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Set tester prove between ECM terminal 24 (HO2S1 heater signal) and ground.
5. Start engine and let it idle.
6. Check the voltage under the following conditions.
Verify that the oscilloscope screen shows the signal waves as
shown below.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
24 G/WHeated oxygen sen-
sor 1 heater[Engine is running]
Warm-up condition.
Engine speed is below 3,600 rpmApproximately 7.0V
[Engine is running]
Engine speed is above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
PBIB0519E
Conditions Voltage
At idleApproximately 7.0V
Engine speed is above 3,600 rpm.BATTERY VOLTAGE
(11 - 14V)
MBIB0038EPBIB0519E
Page 1152 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual EC-774
[QR (WITHOUT EURO-OBD)]
HO2S1 HEATER
2. CHECK HO2S1 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 1 harness connector.
3. Turn ignition switch ON.
4. Ch NISSAN X-TRAIL 2003 Service Repair Manual EC-774
[QR (WITHOUT EURO-OBD)]
HO2S1 HEATER
2. CHECK HO2S1 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 1 harness connector.
3. Turn ignition switch ON.
4. Ch](/manual-img/5/57404/w960_57404-1151.png)
EC-774
[QR (WITHOUT EURO-OBD)]
HO2S1 HEATER
2. CHECK HO2S1 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 1 harness connector.
3. Turn ignition switch ON.
4. Check voltage between HO2S1 terminal 4 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E60, F36
Fuse block (J/B) connector E103
10A fuse
Harness for open or short between heated oxygen sensor 1 and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK HO2S1 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between HO2S1 terminal 1 and ECM terminal 24.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to EC-775, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace heated oxygen sensor 1.
PBIB0500E
Voltage: Battery voltage
PBIB0541E
Continuity should exist.