Inspection Procedure

HINT:

If other DTCs relating to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

READ VALUE OF INTELLIGENT TESTER (THROTTLE VALVE OPENING PERCENTAGE)

Connect the intelligent tester to the DLC3.
Start the engine.
On the tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ETCS / THROTTLE POS.

Read its value displayed on the tester when the accelerator pedal is released and depressed.

Result

RESULT CHART

Throttle Valve Opening Angle (%)	Proceed to
0	A
From approximately 0 to 75	B
Approximately 100	C

B : CHECK FOR INTERMITTENT PROBLEMS

C : Go to step 4

Fig 1: Identifying Accelerator Pedal Released And Depressed Position

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A : Go to next step

INSPECT THROTTLE POSITION SENSOR

Disconnect the T1 Throttle Position (TP) sensor connector.

Measure the resistance of the TP sensor.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Throttle Valve Position	Specified Condition
VC (T1-1) - E2 (T1-2)	-	2.5 to 5.9 kΩ
VTA (T1-3) - E2 (T1-2)	Fully closed	0.2 to 5.7 kΩ
VTA (T1-3) - E2 (T1-2)	Fully open	2.0 to 10.2 kΩ

NG : REPLACE THROTTLE POSITION SENSOR

Fig 2: Identifying Throttle Position Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (ECM - THROTTLE POSITION SENSOR)

Disconnect the E3 ECM connector.

Measure the resistance of the ECM connector.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Throttle Valve Position	Specified Condition
VC (E3-18) - E2 (E3-28)	-	2.5 to 5.9 kΩ
VTA1 (E3-20) - E2 (E3-28)	Fully closed	0.2 to 5.7 kΩ
VTA1 (E3-20) - E2 (E3-28)	Fully open	2.0 to 10.2 kΩ

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
VC (E3-18) - Body ground	10 kΩ or higher
VTA1 (E3-20) - Body ground	10 kΩ or higher

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 3: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE ECM

INSPECT THROTTLE POSITION SENSOR

Disconnect the T1 TP sensor connector.

Measure the resistance of the TP sensor.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Throttle Valve Position	Specified Condition
VC (T1-1) - E2 (T1-2)	-	2.5 to 5.9 kΩ
VTA (T1-3) - E2 (T1-2)	Fully closed	0.2 to 5.7 kΩ
VTA (T1-3) - E2 (T1-2)	Fully open	2.0 to 10.2 kΩ

NG : REPLACE THROTTLE POSITION SENSOR

Fig 4: Identifying TP Sensor Connector Terminals

CHECK HARNESS AND CONNECTOR (ECM - THROTTLE POSITION SENSOR)

Disconnect the E3 ECM connector.

Fig 5: Identifying ECM Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the T1 TP sensor connector.

Measure the resistance of the wire harness side connectors.

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
VC (T1-1) - VC (E3-18)	Below 1 Ω
VTA (T1-3) - VTA1 (E3-20)	Below 1 Ω
E2 (T1-2) - E2 (E3-28)	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
VC (T1-1) or VC (E3-18) - Body ground	10 kΩ or higher
VTA (T1-3) or VTA1 (E3-20) - Body ground	10 kΩ or higher

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 6: Identifying TP Sensor Connector Terminals

OK : REPLACE ECM