Code No. P1A01: Accelerator pedal position sensor (sub) power supply circuit

ACCELERATOR PEDAL POSITION SENSOR CIRCUIT

OPERATION

The accelerator pedal position sensor (sub) is supplied with the 5-V power from the EV-ECU.

DIAGNOSIS CODE SET CONDITIONS

If the accelerator pedal position sensor (sub) power supply voltage raw value of 4.8 V or less or 5.2 V or higher continues, the diagnosis code No. P1A01 will be set.

PROBABLE CAUSES

Damaged wiring harness or connector(s)
Malfunction of accelerator pedal position sensor (sub)
Malfunction of the EV-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

Check the service data for the accelerator pedal position sensor (sub). (Refer to

Item No. 76 : Accelerator sensor 2 power supply voltage

Q. Is the check result normal?

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

	Go to Step 2.

STEP 2. Measure the voltage at B-11 accelerator pedal position sensor (sub) connector.

(1)Disconnect the B-11 accelerator pedal position sensor (sub), and measure the voltage at the wiring harness side.

(2)Turn the electric motor switch to the "ON" position.

(3)Measure the voltage between the B-11 accelerator pedal position sensor (sub) connector terminal No. 4 and the body earth.
OK: 4.9 to 5.1 V

Q. Is the check result normal?

	Go to Step 5.

	Go to Step 3.

STEP 3. Connector check: B-11 accelerator pedal position sensor (sub) connector, C-106 EV-ECU connector

Q. Is the check result normal?

	Go to Step 4.

	Repair the damaged connector.

STEP 4. Check the wiring harness between C-106 EV-ECU connector terminal No. 8 and B-11 accelerator pedal position sensor (sub) connector terminal No. 4.

Check the power supply line for open circuit.

Q. Is the check result normal?

	Go to Step 5.

	Repair the wiring harness.

STEP 5. Diagnosis code recheck

Check again if the diagnosis code is set to the EV-ECU.

(1)Erase the stored diagnosis code.

(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.

(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

	Replace the accelerator pedal. (Refer to GROUP 17 - Accelerator Pedal Removal and Installation .) Then go to Step 6.

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

STEP 6. Diagnosis code recheck

Check again if the diagnosis code is set to the EV-ECU.

(1)Erase the stored diagnosis code.

(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.

(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

	Replace the EV-ECU. (Refer to .) Then go to Step 7.

	The diagnosis is complete.

STEP 7. Diagnosis code recheck

Check again if the diagnosis code is set to the EV-ECU.

(1)Erase the stored diagnosis code.

(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.

(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

	Return to Step 1.

	The diagnosis is complete.

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