Inspection Procedure

HINT:

Read freeze frame data using an intelligent tester. Freeze frame data record 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 an intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester ON.
Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

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 TABLE

A: GO TO NEXT STEP

READ VALUE USING INTELLIGENT TESTER (ACCEL POS #1 AND ACCEL POS #2)

Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON and turn the tester ON.
Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / ACCEL POS #1 and ACCEL POS #2.

Read the values displayed on the tester.

Standard voltage

VOLTAGE SPECIFICATION

Accelerator Pedal Operations	ACCEL POS #1	ACCEL POS #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: Depressing & 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 the intelligent tester to the DLC3.
Turn the ignition switch to 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: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

Read DTCs.

Result

RESULT REFERENCE

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

B: SYSTEM OK

A: REPLACE ECM