1

2

3

4

5

6

Acceleration Pedal Position Sensor IP50

FE02-5242b

(a)

Check APP sensor harness connector IP50 terminal No.4
output voltage. For the Standard Value. Refer to

2.12.7.13

 

Acceleration Pedal Position Sensor (APP) Check

.

Is the output voltage Standard Value?

No

Replace the APP sensor. Refer to the "APP
sensor better."

Yes

Go to step 7

Yes

Step 5

Check APP sensor harness connector IP50 terminals No.2 and 3.

1

2

3

4

5

6

1

17

33

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Acceleration Pedal Position Sensor IP50

ECM Harness Connector EO35

FE02-5243b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect APP sensor harness connector IP50.

(c)

Disconnect ECM harness connector EO35.

(d)

Turn the ignition switch to "ON" position.

(e)

Measure resistance between IP50 terminal No.2 and a
reliable ground.

(f)

Test continuity between IP50 terminal No.2 and EO35
terminal No.36.

(g)

Measure voltage between IP50 terminal No.2 and a reliable
ground.

(h)

Test continuity between IP50 terminal No.3 and EO35
terminal No.37.

Results:

Test Items

Standard Value

Resistance Between IP50
(2) and A Reliable Ground

10 kΩ or higher

Continuity Between IP50 (2)
and EO35 (36)

Less than 1 Ω

Voltage Between IP50 (3)
and A Reliable Ground

0 V

Continuity Between IP50 (3)
and EO35 (37)

Less than 1 Ω

Standard values?

No

Circuit fault, Repair the faulty part.

Yes

Step 6

Check ECM power supply circuit and ground circuit.

Engine

Control System JL4G15-D

2-779

(a)

Check ECM power supply circuit and ground circuit. Refer to

2.12.7.43

 

DTC P0562 P0563

.

ECM power and ground circuits normal?

No

Power and ground circuit fault.

Yes

Step 7

Replace ECM. Refer to 

2.2.8.8

 

Engine Control Module Replacement

.

Next

Step 8

Carry out crankshaft position sensor learn. Refer to 

2.12.7.11

 

Crankshaft Position Sensor (CKP) Learn

.

Next

Step 9

Use scan tool to confirm whether the DTC code is stored again.

(a)

Connect scan tool to the datalink connector.

(b)

Turn the ignition switch to "ON" position.

(c)

Clear DTC code.

(d)

Start and run the engine at idle speed to warm up the engine
for at least 5 min.

(e)

Road test the vehicle for at least 10 min.

(f)

Read control system DTC code again to confirm that the
system has no DTC code.

No

Intermittent Fault. Refer to

2.12.7.3

 

Intermittent Fault Check

Yes

Step 10

Diagnostic completed.

5. Repair Instructions:

Acceleration pedal position sensor (APP) can only be replaced as an assembly. Do not disassemble. APP replacement Refer to
"Acceleration Pedal Position Sensor Replacement".

2.12.7.53 DTC P2127 P2128

1. DTC Descriptor:

DTC

P2127

Electronic Throttle Pedal Position Sensor 2 Circuit Low Voltage

DTC

P2128

Electronic Throttle Pedal Position Sensor 2 Circuit High Voltage

In order to protect the security of the system, acceleration pedal position sensor (APP) uses a dual-sensor setting, sliding resistive.
APP sensor 2 output is IP50 terminal No.6, through ECM wiring harness Connect EO35 terminal No.27 to ECM.

2-780

Control System JL4G15-D

Engine

2. Conditions For Setting DTC and The Fault Location:

DTC

Code

DTC Detection Strategy

Conditions For Setting The DTC (Control Strategy)

Fault Locations

P2127

Hardware Circuit Malfunction

Voltage is below the minimum limit, or short to ground

1. Acceleration

Pedal Position
Sensor

2. Acceleration

Pedal Position
Sensor Circuit

3. ECM

P2128

Hardware Circuit Malfunction

Voltage is higher than the maximum limit, or short to power
supply

3. Schematic:

Refer to 

2.12.7.52

 

DTC P2122 P2123

.

4. Diagnostic Steps:

Step 1

Check APP sensor harness connector IP50 terminal voltage of the No.1.

1

2

3

4

5

6

Acceleration Pedal Position Sensor IP50

FE02-5244b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect APP sensor harness connector IP50.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure voltage between IP50 terminal No.1 and a reliable
ground.

Standard Voltage: 4.8-5.2 V

Standard values?

No

If the voltage is higher than the Standard
Value, the circuit is short to power supply, if
the voltage is lower than the standard value.

Yes

Step 2

Check resistance between APP sensor harness connector IP50 terminal No.5 and a reliable ground.

Engine

Control System JL4G15-D

2-781

1

2

3

4

5

6

Acceleration Pedal Position Sensor IP50

FE02-5245b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect APP sensor harness connector IP50.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure resistance between IP50 terminal No.5 and a
reliable ground.

Standard Resistance: Less than 3 Ω

Standard resistance?

No

Go to step 5

Yes

Step 3

Check APP sensor harness connector IP50 terminal No.6.

1

2

3

4

5

6

1

17

33

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Acceleration Pedal Position Sensor IP50

ECM Harness Connector EO35

FE02-5246b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect APP sensor harness connector IP50.

(c)

Disconnect ECM harness connector EO35.

(d)

Measure resistance between IP50 terminal No.6 and a
reliable ground.

(e)

Measure voltage between IP50 terminal No.6 and a reliable
ground.

(f)

Test continuity between IP50 terminal No.64 and EO35
terminal No.27.

Results:

Test Items

Standard Value

Resistance Between IP50 (6)
and A Reliable Ground

10 kΩ or higher

Voltage Between IP50 (6) and
A Reliable Ground

0 V

Continuity Between IP50 (6)
and EO35 (27)

Less than 1 Ω

Standard values?

No

Circuit fault. Repair the faulty part.

Yes

Step 4

Check APP sensor harness connector IP50 terminal No.6 output voltage.

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Engine