Inspection Procedure

HINT:

Read freeze frame data using Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121)

Connect Techstream to the DLC3.
Turn the ignition switch ON.
Turn the tester ON.
Select the following menu items: Powertrain / Engine and ECT / Trouble Code.

Read DTCs.

Result

RESULT REFERENCE

Display (DTC Output)	Proceed To
P2121	A
P2121 and other DTCs	B

HINT:

If any DTCs other than P2121 are output, troubleshoot those DTCs first.

B: GO TO DTC CHART

A: Go to Next Step

READ VALUE USING TECHSTREAM (ACCELERATOR POSITION NO. 1 AND NO. 2)

Connect Techstream to the DLC3.
Turn the ignition switch ON and turn the tester ON.
Select the following menu items: Powertrain / Engine and ECT / Data List / Accelerator Position No. 1 and Accelerator Position No. 2.

Read the values displayed on the tester.

Standard voltage

VOLTAGE SPECIFICATION

Accelerator Pedal Operations	Accelerator Position No. 1	Accelerator Position No. 2
Released	0.5 to 1.1 V	1.2 to 2.0 V
Depressed	2.6 to 4.5 V	3.4 to 5.0 V

Fig 1: Identifying Depressing And Releasing Accelerator Pedal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: CHECK FOR INTERMITTENT PROBLEMS

NG: Go to Next Step

REPLACE ACCELERATOR PEDAL ASSEMBLY

CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)

Connect Techstream to the DLC3.
Turn the ignition switch o ON and turn the tester ON.
Clear DTCs (see DTC CHECK / CLEAR ).
Start the engine.
Allow the engine to idle for 15 seconds.
Select the following menu items: Powertrain / Engine and ECT / Trouble Code.

Read DTCs.

Result

RESULT REFERENCE

Display (DTC Output)	Proceed To
P2121	A
No output	B

B: SYSTEM OK

A: REPLACE ECM