54Da-DTC P2127 APS (SUB) LOW, P2128 APS (SUB) HIGH

DTC P2127: APP sensor(sub) low
DTC P2128: APP sensor(sub) high

caution

Before replacing the ECU, ensure that the communication circuit is normal.

MONITOR EXECUTION

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)

Sensor (The sensor below is determined to be normal)

DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

Judgment Criterion <DTC P2127>

The accelerator pedal position sensor (sub) output voltage is less than 0.2 volts for 0.3 second.

Judgment Criterion <DTC P2128>

The accelerator pedal position sensor (sub) output voltage is more than 2.5 volts for 0.3 second.

OBD-II DRIVE CYCLE PATTERN

PROBABLE CAUSES

DIAGNOSIS

Required Special Tools

STEP 1. Using scan tool (M.U.T.-IIISE), check the data list.

Check that the following data list display contents are normal (Refer to

Data list

Check condition	Normal condition
Release the accelerator pedal.	0.8 - 1.2 V
Depress the accelerator pedal.	Increases in response to the depression amount.
Accelerator pedal fully opened	4.0 - 4.8 V

Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction

Replace the accelerator pedal position sensor (Refer to GROUP 17 - Accelerator Pedal

). Then go to Step 2

STEP 2. Test the OBD-II drive cycle.

(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1

(2) Check the DTC.

Is the DTC set?

Replace the PHEV-ECU (Refer to

). Then go to Step 3

The inspection is complete.

STEP 3. Test the OBD-II drive cycle.

(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1

(2) Check the DTC.

Is the DTC set?

Retry the troubleshooting.

The inspection is complete.