Inspection Procedure 31: Accelerator Pedal Position Switch Circuit System <Vehicles except for Australia, South africa and Hong kong >

OPERATION

A power voltage of 5 V is applied to the accelerator pedal position switch output terminal (terminal No. 4) from the engine-A/T-ECU (terminal No. 38).

The power voltage is earthed to the engine-A/T-ECU (terminal No. 96) from the Accelerator pedal position switch (terminal No. 5).

COMMENT ON TROUBLE SYMPTOM

Accelerator pedal position switch turns OFF when amount of travel of the accelerator pedal exceeds the prescribed value.

Engine-A/T-ECU uses the signal that is input by the accelerator pedal position switch for determining the abnormal characteristics of the accelerator pedal position sensor (sub).

PROBABLE CAUSE

Failed accelerator pedal position switch.

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

Failed engine-A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: B-124 accelerator pedal position sensor connector

Q: Is the check result normal?

YES: Go to Step 2

.
NO: Repair.

STEP 2. Check accelerator pedal position switch itself

Check accelerator pedal position switch itself (Refer to ).

Q: Is the check result normal?

YES: Go to Step 3

.
NO: Replace accelerator pedal position sensor.

STEP 3. Perform voltage measurement at B-124 accelerator pedal position sensor connector.

Disconnect connector, and measure at harness side.

Ignition switch: ON

Voltage between terminal No. 4 and earth.

OK: 4.9 - 5.1 V

Q: Is the check result normal?

YES: Go to Step 8

.
NO: Go to Step 4

STEP 4. Perform voltage measurement at C-135 engine-A/T-ECU connector.

Measure engine-A/T-ECU terminal voltage.

Disconnect B-124 accelerator pedal position sensor

Ignition switch: ON

Voltage between terminal No. 38 and earth.

OK: 4.9 - 5.1 V

Q: Is the check result normal?

YES: Go to Step 5

.
NO: Go to Step 6

STEP 5. Connector check: C-135 engine-A/T-ECU connector.

Q: Is the check result normal?

YES:

Check and repair harness between B-124 (terminal No. 4) accelerator pedal position sensor connector and C-135 (terminal No. 38) engine-A/T-ECU connector.

Check output line for open circuit.

NO: Repair.

STEP 6. Connector check: C-135 engine-A/T-ECU connector

Q: Is the check result normal?

YES: Go to Step 7

.
NO: Repair.

STEP 7. Check harness between B-124 (terminal No. 4) accelerator pedal position sensor connector and C-135 (terminal No. 38) engine-A/T-ECU connector.

Check output line for short circuit.

Q: Is the check result normal?

YES: Replace engine-A/T-ECU.
NO: Repair.

STEP 8. Perform resistance measurement at B-124 accelerator pedal position sensor connector.

Disconnect connector and measure at harness side.

Resistance between terminal No. 5 and earth.

OK: 2 Ω or less

Q: Is the check result normal?

YES: Go to Step 11

.
NO: Go to Step 9

STEP 9. Connector check: C-137 engine-A/T-ECU connector

Q: Is the check result normal?

YES: Go to Step 10

.
NO: Repair.

STEP 10. Check harness between B-124 (terminal No. 5) accelerator pedal position sensor connector and C-137 (terminal No. 96) engine-A/T-ECU connector.

Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES: Replace engine-A/T-ECU.
NO: Repair.

STEP 11. Perform voltage measurement at C-135 engine-A/T-ECU connector

Measure engine-A/T-ECU terminal voltage.

Ignition switch: ON

Voltage between terminal No. 38 and earth.

OK:
0 - 1 V (Release the accelerator pedal)

4 V or more (Depress the accelerator pedal)

Q: Is the check result normal?

YES: Replace engine-A/T-ECU.
NO: Go to Step 12

STEP 12. Connector check: C-135 engine-A/T-ECU connector

Q: Is the check result normal?

YES: Go to Step 13

.
NO: Repair.

STEP 13. Check harness between B-124 (terminal No. 4) accelerator pedal position sensor connector and C-135 (terminal No. 38) 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. Connector check: C-137 engine-A/T-ECU connector

Q: Is the check result normal?

YES:

Check harness between B-124 (terminal No. 5) accelerator pedal position sensor connector and C-137 (terminal No. 96) engine-A/T-ECU connector.

Check earthing line for damage.

NO: Repair.


Inspection Procedure 31: Accelerator Pedal Position Switch Circuit System <Vehicles except for Australia, South africa and Hong kong >

OPERATION A power voltage of 5 V is applied to the accelerator pedal position switch output terminal (terminal No. 4) from the engine-A/T-ECU (terminal No. 38). The power voltage is earthed to the engine-A/T-ECU (terminal No. 96) from the Accelerator pedal position switch (terminal No. 5).
COMMENT ON TROUBLE SYMPTOM Accelerator pedal position switch turns OFF when amount of travel of the accelerator pedal exceeds the prescribed value. Engine-A/T-ECU uses the signal that is input by the accelerator pedal position switch for determining the abnormal characteristics of the accelerator pedal position sensor (sub).
PROBABLE CAUSE Failed accelerator pedal position switch. Open/short circuit in accelerator pedal position switch circuit or loose connector contact. Failed engine-A/T-ECU
	DIAGNOSIS PROCEDURE

	STEP 1. Connector check: B-124 accelerator pedal position sensor connector
	Q: Is the check result normal? YES: Go to Step 2 . NO: Repair.
	STEP 2. Check accelerator pedal position switch itself Check accelerator pedal position switch itself (Refer to ). Q: Is the check result normal? YES: Go to Step 3 . NO: Replace accelerator pedal position sensor.
	STEP 3. Perform voltage measurement at B-124 accelerator pedal position sensor connector.
	Disconnect connector, and measure at harness side. Ignition switch: ON Voltage between terminal No. 4 and earth. OK: 4.9 - 5.1 V Q: Is the check result normal? YES: Go to Step 8 . NO: Go to Step 4 .
	STEP 4. Perform voltage measurement at C-135 engine-A/T-ECU connector.
	Measure engine-A/T-ECU terminal voltage. Disconnect B-124 accelerator pedal position sensor Ignition switch: ON Voltage between terminal No. 38 and earth. OK: 4.9 - 5.1 V Q: Is the check result normal? YES: Go to Step 5 . NO: Go to Step 6 .
	STEP 5. Connector check: C-135 engine-A/T-ECU connector.
	Q: Is the check result normal? YES: Check and repair harness between B-124 (terminal No. 4) accelerator pedal position sensor connector and C-135 (terminal No. 38) engine-A/T-ECU connector. Check output line for open circuit. NO: Repair.
	STEP 6. Connector check: C-135 engine-A/T-ECU connector
	Q: Is the check result normal? YES: Go to Step 7 . NO: Repair.
	STEP 7. Check harness between B-124 (terminal No. 4) accelerator pedal position sensor connector and C-135 (terminal No. 38) engine-A/T-ECU connector.
	Check output line for short circuit. Q: Is the check result normal? YES: Replace engine-A/T-ECU. NO: Repair.
	STEP 8. Perform resistance measurement at B-124 accelerator pedal position sensor connector.
	Disconnect connector and measure at harness side. Resistance between terminal No. 5 and earth. OK: 2 Ω or less Q: Is the check result normal? YES: Go to Step 11 . NO: Go to Step 9 .
	STEP 9. Connector check: C-137 engine-A/T-ECU connector Q: Is the check result normal?
	YES: Go to Step 10 . NO: Repair.
	STEP 10. Check harness between B-124 (terminal No. 5) accelerator pedal position sensor connector and C-137 (terminal No. 96) engine-A/T-ECU connector.
	Check earthing line for open circuit and damage. Q: Is the check result normal? YES: Replace engine-A/T-ECU. NO: Repair.
	STEP 11. Perform voltage measurement at C-135 engine-A/T-ECU connector
	Measure engine-A/T-ECU terminal voltage. Ignition switch: ON Voltage between terminal No. 38 and earth. OK: 0 - 1 V (Release the accelerator pedal) 4 V or more (Depress the accelerator pedal) Q: Is the check result normal? YES: Replace engine-A/T-ECU. NO: Go to Step 12 .
	STEP 12. Connector check: C-135 engine-A/T-ECU connector
	Q: Is the check result normal? YES: Go to Step 13 . NO: Repair.
	STEP 13. Check harness between B-124 (terminal No. 4) accelerator pedal position sensor connector and C-135 (terminal No. 38) 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. Connector check: C-137 engine-A/T-ECU connector
	Q: Is the check result normal? YES: Check harness between B-124 (terminal No. 5) accelerator pedal position sensor connector and C-137 (terminal No. 96) engine-A/T-ECU connector. Check earthing line for damage. NO: Repair.