Code No. P2138: Accelerator Pedal Position Sensor (Main and Sub) Range/Performance Problem

OPERATION

Refer to Code No. P2122: Accelerator Pedal Position Sensor (main) Circuit Low Input .

Refer to Code No. P2127: Accelerator Pedal Position Sensor (sub) Circuit Low Input .

FUNCTION

Engine-A/T-ECU checks the accelerator pedal position sensor output signal characteristics for abnormal conditions.

TROUBLE JUDGMENT <General export, Gcc, Chile, Brazil, Argentina and vehicles for Hong kong>

Check Conditions

Accelerator pedal position sensor is normal.

Accelerator pedal position sensor (main) output voltage is 0.2 - 4.5 V.

Accelerator pedal position sensor (sub) output voltage is 0.2 - 4.5 V.

Ignition switch is "ON" position.

Crank switch is "OFF".

Judgment Criteria

Accelerator pedal position sensor (sub) output voltage minus accelerator pedal position sensor (main) output voltage is 1 volt or higher for 1 second.

Accelerator pedal position sensor (main) output voltage minus accelerator pedal position sensor (sub) output voltage is 1 volt or higher for 0.2 second.

Judgment Criteria <Vehicles except for Hong kong>

Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.1 V for 0.075 second.

The output voltage of accelerator pedal position sensor rises rapidly.

Check Conditions <Vehicles except for Hong kong>

Accelerator pedal position sensor is normal.

Accelerator pedal position sensor (main) output voltage is 0.5- 4.5 V.

Accelerator pedal position sensor (sub) output voltage is 0.5 - 4.5 V.

Ignition switch is "ON" position.

Crank switch is "OFF".

After the completion of initial study of accelerator pedal position sensor.

Judgment Criteria <Vehicles except for Hong kong>

Difference between accelerator pedal position sensor (sub) output voltage and accelerator pedal position sensor (main) output voltage is 0.39V or higher for 0.2 second.

Accelerator pedal position sensor (sub) output voltage is 2V or lower for 0.2 second.

Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.06 V.

Change of accelerator pedal position sensor (main) output voltage per 0.025 second is higher than 0.1 V

TROUBLE JUDGMENT <Australia and South Africa except vehicles for Hong Kong>

Check Conditions

Accelerator pedal position sensor is normal.

Accelerator pedal position sensor (main) output voltage is 0.6 - 4.5 V.

Accelerator pedal position sensor (sub) output voltage is 0.2 - 4.5 V.

Ignition switch is "ON" position.

Crank switch is "OFF".

Judgment Criteria

Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.1V for 0.075 second.

The output voltage of accelerator pedal position sensor rises rapidly.

Check Conditions

Accelerator pedal position sensor is normal.

Accelerator pedal position sensor (main) output voltage is 0.5 - 4.5 V.

Accelerator pedal position sensor (sub) output voltage is 0.5 - 4.5 V.

Ignition switch is "ON" position.

Crank switch is "OFF".

Judgment Criteria

Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.06 V.

Using the formula given below, the voltage of 0.25 V or higher is obtained for 1 second: [accelerator pedal position sensor (sub) output voltage + 0.3 V]- accelerator pedal position sensor (main) output voltage.

Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.06 V.

Using the formula given below, the voltage of 1 V or higher is obtained for 0.2 second: accelerator pedal position sensor (main) output voltage -[accelerator pedal position sensor (sub) output voltage + 0.3 V]

Check Conditions

Accelerator pedal position sensor is normal.

Accelerator pedal position sensor (main) output voltage is 0.2 - 4.5 V.

Accelerator pedal position sensor (sub) output voltage is 0.2 - 4.5 V.

Ignition switch is "ON" position.

Crank switch is "OFF".

After the completion of initial study of accelerator pedal position sensor.

Judgment Criteria

Using the formula given below, the voltage of 0.39 V or higher is obtained for 0.2 second: [accelerator pedal position sensor (sub) output voltage + 0.3 V]- accelerator pedal position sensor (main) output voltage.

Accelerator pedal position sensor (sub) output voltage is 1.7 V or lower for 0.2 second.

Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.06 V.

Change of accelerator pedal position sensor (main) output voltage per 0.025 second is higher than 0.1 V.

PROBABLE CAUSE

Failed accelerator pedal position sensor

Open/short circuit in accelerator pedal position sensor circuit or loose connector contact

Failed engine-A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position connector

Q: Is the check result normal?

YES: Go to Step 2

.
NO: Repair.

STEP 2. Check accelerator pedal position sensor itself.

Check accelerator pedal position sensor itself (Refer to ).

Q: Is the check result normal?

YES: Go to Step 3

.
NO: Replace accelerator pedal position sensor.

STEP 3. Perform resistance measurement at B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector.

Disconnect connector, and measure at harness side.

Resistance between terminal No. 1 and earth. <Vehicles except for Australia, South africa and Hong kong>

Resistance between terminal No. 2 and earth. <Vehicles for Australia, South africa and Hong kong>

OK: 2 Ω or less

Q: Is the check result normal?

YES: Go to Step 7

.
NO: Go to Step 4

STEP 4. Connector check: C-137 engine-A/T-ECU connector

Q: Is the check result normal?

YES: Go to Step 5

.
NO: Repair.

STEP 5. Check harness between B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 91) engine-A/T-ECU connector.

Check earthing line for damage.

Q: Is the check result normal?

YES: Go to Step 6

.
NO: Repair.

STEP 6. Check the trouble symptoms

Q: Does trouble symptom persist?

YES: Replace engine-A/T-ECU.
NO: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points

STEP 7. Perform resistance measurement at B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector.

Disconnect connector, and measure at harness side.

Resistance between terminal No. 7 and earth.

OK: 2 Ω or less

Q: Is the check result normal?

YES: Go to Step 11

.
NO: Go to Step 8

STEP 8. Connector check: C-137 engine-A/T-ECU connector

Q: Is the check result normal?

YES: Go to Step 9

.
NO: Repair.

STEP 9. Check harness between B-124 (terminal No.7) <Vehicles except for Australia, South africa and Hong kong> or C-41 (terminal No.8) <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 96) engine-A/T-ECU connector.

Check earthing line for damage.

Q: Is the check result normal?

YES: Go to Step 6

.
NO: Repair.

STEP 10. Connector check: C-137 engine-A/T-ECU connector

Q: Is the check result normal?

YES: Go to Step 11

.
NO: Repair.

STEP 11. Check harness between B-124 (terminal No. 2) <Vehicles except for Australia, South africa and Hong kong> or C-41 (terminal No. 1) <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 92) engine-A/T-ECU connector.

Check power supply line for damage.

Q: Is the check result normal?

YES: Go to Step 12

.
NO: Repair.

STEP 12. Check harness between B-124 (terminal No. 8) <Vehicles except for Australia, South africa and Hong kong> or C-41 (terminal No. 7) <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 97) engine-A/T-ECU connector.

Check power supply line for damage.

Q: Is the check result normal?

YES: Go to Step 13

.
NO: Repair.

STEP 13. Check harness between B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 114) engine-A/T-ECU connector.

Check output line for damage.

Q: Is the check result normal?

YES: Go to Step 14

.
NO: Repair.

STEP 14. Check harness between B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 107) engine-A/T-ECU connector.

Check output line for damage.

Q: Is the check result normal?

YES: Go to Step 6

.
NO: Repair.


Code No. P2138: Accelerator Pedal Position Sensor (Main and Sub) Range/Performance Problem

OPERATION Refer to Code No. P2122: Accelerator Pedal Position Sensor (main) Circuit Low Input . Refer to Code No. P2127: Accelerator Pedal Position Sensor (sub) Circuit Low Input .
FUNCTION Engine-A/T-ECU checks the accelerator pedal position sensor output signal characteristics for abnormal conditions.
TROUBLE JUDGMENT <General export, Gcc, Chile, Brazil, Argentina and vehicles for Hong kong> Check Conditions Accelerator pedal position sensor is normal. Accelerator pedal position sensor (main) output voltage is 0.2 - 4.5 V. Accelerator pedal position sensor (sub) output voltage is 0.2 - 4.5 V. Ignition switch is "ON" position. Crank switch is "OFF". Judgment Criteria Accelerator pedal position sensor (sub) output voltage minus accelerator pedal position sensor (main) output voltage is 1 volt or higher for 1 second. or Accelerator pedal position sensor (main) output voltage minus accelerator pedal position sensor (sub) output voltage is 1 volt or higher for 0.2 second. Judgment Criteria <Vehicles except for Hong kong> Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.1 V for 0.075 second. The output voltage of accelerator pedal position sensor rises rapidly. Check Conditions <Vehicles except for Hong kong> Accelerator pedal position sensor is normal. Accelerator pedal position sensor (main) output voltage is 0.5- 4.5 V. Accelerator pedal position sensor (sub) output voltage is 0.5 - 4.5 V. Ignition switch is "ON" position. Crank switch is "OFF". After the completion of initial study of accelerator pedal position sensor. Judgment Criteria <Vehicles except for Hong kong> Difference between accelerator pedal position sensor (sub) output voltage and accelerator pedal position sensor (main) output voltage is 0.39V or higher for 0.2 second. Accelerator pedal position sensor (sub) output voltage is 2V or lower for 0.2 second. Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.06 V. Change of accelerator pedal position sensor (main) output voltage per 0.025 second is higher than 0.1 V
TROUBLE JUDGMENT <Australia and South Africa except vehicles for Hong Kong> Check Conditions Accelerator pedal position sensor is normal. Accelerator pedal position sensor (main) output voltage is 0.6 - 4.5 V. Accelerator pedal position sensor (sub) output voltage is 0.2 - 4.5 V. Ignition switch is "ON" position. Crank switch is "OFF". Judgment Criteria Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.1V for 0.075 second. The output voltage of accelerator pedal position sensor rises rapidly. Check Conditions Accelerator pedal position sensor is normal. Accelerator pedal position sensor (main) output voltage is 0.5 - 4.5 V. Accelerator pedal position sensor (sub) output voltage is 0.5 - 4.5 V. Ignition switch is "ON" position. Crank switch is "OFF". Judgment Criteria Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.06 V. Using the formula given below, the voltage of 0.25 V or higher is obtained for 1 second: [accelerator pedal position sensor (sub) output voltage + 0.3 V]- accelerator pedal position sensor (main) output voltage. or Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.06 V. Using the formula given below, the voltage of 1 V or higher is obtained for 0.2 second: accelerator pedal position sensor (main) output voltage -[accelerator pedal position sensor (sub) output voltage + 0.3 V] Check Conditions Accelerator pedal position sensor is normal. Accelerator pedal position sensor (main) output voltage is 0.2 - 4.5 V. Accelerator pedal position sensor (sub) output voltage is 0.2 - 4.5 V. Ignition switch is "ON" position. Crank switch is "OFF". After the completion of initial study of accelerator pedal position sensor. Judgment Criteria Using the formula given below, the voltage of 0.39 V or higher is obtained for 0.2 second: [accelerator pedal position sensor (sub) output voltage + 0.3 V]- accelerator pedal position sensor (main) output voltage. Accelerator pedal position sensor (sub) output voltage is 1.7 V or lower for 0.2 second. Change of accelerator pedal position sensor (sub) output voltage per 0.025 second is lower than 0.06 V. Change of accelerator pedal position sensor (main) output voltage per 0.025 second is higher than 0.1 V.
PROBABLE CAUSE Failed accelerator pedal position sensor Open/short circuit in accelerator pedal position sensor circuit or loose connector contact Failed engine-A/T-ECU
	DIAGNOSIS PROCEDURE

	STEP 1. Connector check: B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position connector
	Q: Is the check result normal? YES: Go to Step 2 . NO: Repair.
	STEP 2. Check accelerator pedal position sensor itself. Check accelerator pedal position sensor itself (Refer to ). Q: Is the check result normal? YES: Go to Step 3 . NO: Replace accelerator pedal position sensor.
	STEP 3. Perform resistance measurement at B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector.
	Disconnect connector, and measure at harness side. Resistance between terminal No. 1 and earth. <Vehicles except for Australia, South africa and Hong kong> Resistance between terminal No. 2 and earth. <Vehicles for Australia, South africa and Hong kong> OK: 2 Ω or less Q: Is the check result normal? YES: Go to Step 7 . NO: Go to Step 4 .
	STEP 4. Connector check: C-137 engine-A/T-ECU connector
	Q: Is the check result normal? YES: Go to Step 5 . NO: Repair.
	STEP 5. Check harness between B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 91) engine-A/T-ECU connector.
	Check earthing line for damage. Q: Is the check result normal? YES: Go to Step 6 . NO: Repair.
	STEP 6. Check the trouble symptoms Q: Does trouble symptom persist? YES: Replace engine-A/T-ECU. NO: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).
	STEP 7. Perform resistance measurement at B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector.
	Disconnect connector, and measure at harness side. Resistance between terminal No. 7 and earth. OK: 2 Ω or less Q: Is the check result normal? YES: Go to Step 11 . NO: Go to Step 8 .
	STEP 8. Connector check: C-137 engine-A/T-ECU connector
	Q: Is the check result normal? YES: Go to Step 9 . NO: Repair.
	STEP 9. Check harness between B-124 (terminal No.7) <Vehicles except for Australia, South africa and Hong kong> or C-41 (terminal No.8) <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 96) engine-A/T-ECU connector.
	Check earthing line for damage. Q: Is the check result normal? YES: Go to Step 6 . NO: Repair.
	STEP 10. Connector check: C-137 engine-A/T-ECU connector
	Q: Is the check result normal? YES: Go to Step 11 . NO: Repair.
	STEP 11. Check harness between B-124 (terminal No. 2) <Vehicles except for Australia, South africa and Hong kong> or C-41 (terminal No. 1) <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 92) engine-A/T-ECU connector.
	Check power supply line for damage. Q: Is the check result normal? YES: Go to Step 12 . NO: Repair.
	STEP 12. Check harness between B-124 (terminal No. 8) <Vehicles except for Australia, South africa and Hong kong> or C-41 (terminal No. 7) <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 97) engine-A/T-ECU connector.
	Check power supply line for damage. Q: Is the check result normal? YES: Go to Step 13 . NO: Repair.
	STEP 13. Check harness between B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 114) engine-A/T-ECU connector.
	Check output line for damage. Q: Is the check result normal? YES: Go to Step 14 . NO: Repair.
	STEP 14. Check harness between B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 107) engine-A/T-ECU connector.
	Check output line for damage. Q: Is the check result normal? YES: Go to Step 6 . NO: Repair.