Qashqai J11. Engine control system (MR20DD) - part 23

 

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Qashqai J11. Engine control system (MR20DD) - part 23

 

 

ECM-354

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P2118 THROTTLE CONTROL MOTOR

5.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning part.

2.

CHECK THROTTLE CONTROL MOTOR

Check the throttle control motor. Refer to 

ECM-354, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electric throttle control actuator. Refer to  

EM-149, "Removal and Installation"

.

Component Inspection

INFOID:0000000010703044

1.

CHECK THROTTLE CONTROL MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Check the resistance between electric throttle control actuator terminals as per the following.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electric throttle control actuator. Refer to 

EM-149, "Removal and Installation"

.

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F45

5

F16

69

Not existed

73

Existed

6

69

Existed

73

Not existed

Electric throttle control actuator

Resistance

(Approx.)

+

−

Terminal

5

6

1 - 15 

Ω

 [at 25

°

C (77

°

F)]

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

ECM-355

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

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ECM

N

P

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P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

DTC Description

INFOID:0000000010703045

DTC DETECTION LOGIC

POSSIBLE CAUSE

Electric throttle control actuator

FAIL-SAFE

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A AND B

1.

Turn ignition switch ON and wait at least 1 second.

2.

Set selector lever to D (CVT) or 1st (M/T) position and wait at least 3 seconds.

3.

Set selector lever to P (CVT) or Neutral (M/T) position.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Turn ignition switch ON and wait at least 1 second.

6.

Set selector lever to D (CVT) or 1st (M/T) position and wait at least 3 seconds.

7.

Set selector lever to P (CVT) or Neutral (M/T) position.

8.

Turn ignition switch OFF, wait at least 10 seconds and then turn ON.

9.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECM-356, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P2119

ETC ACTR-B1
(Throttle actuator control throttle 
body range/performance)

A

Electric throttle control actuator does not function properly due to the return 
spring malfunction.

B

Throttle valve opening angle in fail-safe mode is not in specified range.

C

ECM detects the throttle valve is stuck open.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Traveling con-
trol mode

Accelerator an-
gle variation 
control

ECM controls the accelerator pedal depression speed to make it slower than actual speed. This 
causes a drop in accelerating performance and encourages the driver to repair malfunction.
NOTE:
ECM does not control the accelerator pedal releasing speed.

Engine output 
control

ECM reduces the engine output, according to the rise in engine speed. This reduces the vehicle 
speed to encourage the driver to repair malfunction.

Others

ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed 
opening (approx. 5 degrees) by the return spring.
NOTE:
For pattern A and B refer to A and B of P2119 DTC detection logic.
For C of P2119 DTC detection logic ECM behaves as above.

ECM-356

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Turn ignition switch ON and wait at least 1 second.

2.

Set selector lever to D (CVT) or 1st (M/T) position and wait at least 3 seconds.

3.

Set selector lever to P (CVT) or Neutral (M/T) position.

4.

Start engine and let it idle for 3 seconds.

5.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECM-356, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010703046

1.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1.

Turn ignition switch OFF.

2.

Remove the intake air duct. Refer to 

EM-147, "Removal and Installation"

.

3.

Check if foreign matter is caught between the throttle valve and the housing.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Remove the foreign matter and clean the electric throttle control actuator inside, then perform

throttle valve closed position learning. Refer to 

ECM-128, "Work Procedure"

.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace electric throttle control actuator. Refer to 

EM-149, "Removal and Installation"

.

>> INSPECTION END

P2122, P2123 APP SENSOR

ECM-357

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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ECM

N

P

O

P2122, P2123 APP SENSOR

DTC Description

INFOID:0000000010703047

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (APP sensor 1 circuit is open or shorted.)
• Accelerator pedal position sensor (APP sensor 1)

FAIL-SAFE

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-306, "DTC Description"

.

NO

>> GO TO 2.

2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECM-358, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P2122

APP SEN 1/CIRC
(Throttle/pedal position sensor/switch “D” 
circuit low)

An excessively low voltage from the APP sensor 1 is sent to ECM.

P2123

APP SEN 1/CIRC
(Throttle/pedal position sensor/switch “D” 
circuit high)

An excessively high voltage from the APP sensor 1 is sent to ECM.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Others

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. 
Therefore, the acceleration will be poor. 
NOTE:
If accelerator pedal position sensor 1 and 2 malfunction at the same time conducts following con-
trol.
• ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed 

opening (approx. 5 degrees) by the return spring.

ECM-358

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P2122, P2123 APP SENSOR

Diagnosis Procedure

INFOID:0000000010703048

1.

CHECK DTC PRIORITY

If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-306, "DTC Description"

.

NO

>> GO TO 2.

2.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT-1

1.

Turn ignition switch OFF.

2.

Disconnect accelerator pedal position (APP) sensor harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT-2

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

4.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

4.

CHECK APP SENSOR 1 GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

4.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning part.

5.

CHECK APP SENSOR INPUT SIGNAL CIRCUIT

1.

Check the continuity between APP sensor harness connector and ECM harness connector.

+

−

Voltage

(Approx.)

APP sensor

Connector

Terminal

E20

4

Ground

5 V

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E20

4

E57

122

Existed

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E20

2

E57

127

Existed

P2122, P2123 APP SENSOR

ECM-359

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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ECM

N

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O

2.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning part.

6.

CHECK APP SENSOR

Check the APP sensor. Refer to 

ECM-359, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace accelerator pedal assembly. Refer to 

ACC-3, "Removal and Installation"

.

Component Inspection

INFOID:0000000010703049

1.

CHECK ACCELERATOR PEDAL POSITION SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Turn ignition switch ON.

4.

Check the voltage between ECM harness connector terminals as per the following condition.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace accelerator pedal assembly. Refer to 

ACC-3, "Removal and Installation"

.

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E20

3

E57

126

Existed

ECM

Condition

Voltage

(Approx.)

Connector

+

–

Terminal

E57

126

127

Accelerator pedal

Fully released

0.6 - 0.9 V

Fully depressed

3.9 - 4.7 V

119

120

Fully released

0.3 - 0.6 V

Fully depressed

1.95 - 2.4 V

ECM-360

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P2127, P2128 APP SENSOR

P2127, P2128 APP SENSOR

DTC Description

INFOID:0000000010703050

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors
- APP sensor 2 circuit is open or shorted.
- Sensor power supply 2 circuit is shorted.
• Accelerator pedal position sensor (APP sensor 2)
• Sensor power supply 2 circuit

FAIL-SAFE

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V.

>> 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

>> Proceed to 

ECM-361, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P2127

APP SEN 2/CIRC
(Throttle/pedal position sensor/switch “E” 
circuit low)

An excessively low voltage from the APP sensor 2 is sent to ECM.

P2128

APP SEN 2/CIRC
(Throttle/pedal position sensor/switch “E” 
circuit high)

An excessively high voltage from the APP sensor 2 is sent to ECM.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Others

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. 
Therefore, the acceleration will be poor. 
NOTE:
If accelerator pedal position sensor 1 and 2 malfunction at the same time conducts following con-
trol.
• ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed 

opening (approx. 5 degrees) by the return spring.

P2127, P2128 APP SENSOR

ECM-361

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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ECM

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Diagnosis Procedure

INFOID:0000000010703051

1.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-1

1.

Turn ignition switch OFF.

2.

Disconnect accelerator pedal position (APP) sensor harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 2.

2.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-2

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 3.

3.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-3

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning part.

4.

CHECK SENSOR POWER SUPPLY 2 CIRCUIT

Perform 

ECM-392, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace malfunctioning part.

5.

CHECK APP SENSOR 2 GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

APP sensor

Voltage

(Approx.)

Connector

+

−

Terminal

E20

5

1

5 V

+

−

Voltage

(Approx.)

APP sensor

Connector

Terminal

E20

5

Ground

5 V

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E20

5

E57

118

Existed

ECM-362

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P2127, P2128 APP SENSOR

4.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning part.

6.

CHECK ECM GROUND CIRCUIT

Check the continuity between ECM harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace malfunctioning part.

7.

CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT

1.

Check the continuity between APP sensor harness connector and ECM harness connector.

2.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace malfunctioning part.

8.

CHECK APP SENSOR

Check the APP sensor. Refer to 

ECM-362, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace accelerator pedal assembly. Refer to 

ACC-3, "Removal and Installation"

.

Component Inspection

INFOID:0000000010703052

1.

CHECK ACCELERATOR PEDAL POSITION SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Turn ignition switch ON.

4.

Check the voltage between ECM harness connector terminals as per the following condition.

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E20

1

E57

120

Existed

+

−

Continuity

ECM

Connector

Terminal

F15

11

Ground

Existed

E57

123

125

128

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E20

6

E57

119

Existed

P2127, P2128 APP SENSOR

ECM-363

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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ECM

N

P

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Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace accelerator pedal assembly. Refer to 

ACC-3, "Removal and Installation"

.

ECM

Condition

Voltage

(Approx.)

Connector

+

–

Terminal

E57

126

127

Accelerator pedal

Fully released

0.6 - 0.9 V

Fully depressed

3.9 - 4.7 V

119

120

Fully released

0.3 - 0.6 V

Fully depressed

1.95 - 2.4 V

ECM-364

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P2135 TP SENSOR

P2135 TP SENSOR

DTC Description

INFOID:0000000010703053

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connector (TP sensor 1 or 2 circuit is open or shorted.)
• Electric throttle control actuator (TP sensor 1 or 2)

FAIL-SAFE

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P2135 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-306, "DTC Description"

.

NO

>> GO TO 2.

2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECM-364, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010703054

1.

CHECK DTC PRIORITY

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P2135

TP SENSOR-B1
(Throttle/pedal position sensor/switch “A”/ 
“B” voltage correlation)

Rationally incorrect voltage is sent to ECM compared with the signals from 
TP sensor 1 and TP sensor 2.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Others

• 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 con-

dition. So, the acceleration will be poor. 

NOTE:
If throttle position sensor1 and 2 malfunction at the same time conducts following control.
• ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed 

opening (approx. 5 degrees) by the return spring.

P2135 TP SENSOR

ECM-365

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

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A

ECM

N

P

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If DTC P2135 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-306, "DTC Description"

.

NO

>> GO TO 2.

2.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between electric throttle control actuator harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

4.

Also check harness for short to ground.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

4.

CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

4.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning part.

5.

CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT

1.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

+

−

Voltage

(Approx.)

Electric throttle control actuator

Connector

Terminal

F45

2

Ground

5 V

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F45

2

F16

60

Existed

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F45

4

F16

75

Existed

ECM-366

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P2135 TP SENSOR

2.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning part.

6.

CHECK THROTTLE POSITION SENSOR

Check the throttle position sensor. Refer to 

ECM-366, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electric throttle control actuator. Refer to 

EM-149, "Removal and Installation"

.

Component Inspection

INFOID:0000000010703055

1.

CHECK THROTTLE POSITION SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Perform “Throttle Valve Closed Position Learning”. Refer to 

ECM-128, "Work Procedure"

.

4.

Turn ignition switch ON.

5.

Set selector lever to D (CVT) or 1st (M/T) position.

6.

Check the voltage between ECM harness connector terminals as per the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electric throttle control actuator. Refer to 

EM-149, "Removal and Installation"

.

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F45

1

F16

63

Existed

3

71

ECM

Condition

Voltage

Connector

+

–

Terminal

F16

63

75

Accelerator pedal

Fully re-
leased

More than 0.36 V

Fully de-
pressed

Less than 4.75 V

71

Fully re-
leased

Less than 4.75 V

Fully de-
pressed

More than 0.36 V

P2138 APP SENSOR

ECM-367

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

P2138 APP SENSOR

DTC Description

INFOID:0000000010703056

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connector
- APP sensor 1 or 2 circuit is open or shorted.
- Sensor power supply 2 circuit is shorted.
• Accelerator pedal position sensor (APP sensor 1 or 2)
• Sensor power supply 2 circuit

FAIL-SAFE

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-306, "DTC Description"

.

NO

>> GO TO 2.

2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECM-368, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P2138

APP SENSOR
(Throttle/pedal position sensor/switch “D”/
“E” voltage correlation)

Rationally incorrect voltage is sent to ECM compared with the signals from 
APP sensor 1 and APP sensor 2.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Others

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. 
Therefore, the acceleration will be poor. 
NOTE:
If accelerator pedal position sensor 1 and 2 malfunction at the same time conducts following con-
trol.
• ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed 

opening (approx. 5 degrees) by the return spring.

ECM-368

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P2138 APP SENSOR

Diagnosis Procedure

INFOID:0000000010703057

1.

CHECK DTC PRIORITY

If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-306, "DTC Description"

.

NO

>> GO TO 2.

2.

CHECK APP SENSOR 1 POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect accelerator pedal position (APP) sensor harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace malfunctioning part.

4.

CHECK APP SENSOR 2 POWER SUPPLY-1

1.

Turn ignition switch OFF.

2.

Disconnect APP sensor harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> GO TO 5.

5.

CHECK APP SENSOR 2 POWER SUPPLY-2

Check the voltage between APP sensor harness connector and ground.

APP sensor

Voltage

(Approx.)

Connector

+

−

Terminal

E20

4

2

5 V

+

−

Voltage

(Approx.)

APP sensor

Connector

Terminal

E20

4

Ground

5 V

APP sensor

Voltage

(Approx.)

Connector

+

−

Terminal

E20

5

1

5 V

P2138 APP SENSOR

ECM-369

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 6.

6.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace malfunctioning part.

7.

CHECK SENSOR POWER SUPPLY 2 CIRCUIT

Perform 

ECM-392, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace malfunctioning part.

8.

CHECK APP SENSOR 1 GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

4.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair or replace malfunctioning part.

9.

CHECK APP SENSOR 2 GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

4.

Also check harness for short to power.

+

−

Voltage

(Approx.)

APP sensor

Connector

Terminal

E20

5

Ground

5 V

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E20

5

E57

118

Existed

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E20

2

E57

127

Existed

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E20

1

E57

120

Existed

 

 

 

 

 

 

 

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