OBD II scan tool (excluding hand-held tester):

WARNING: This page is about a different variant/trim than selected.

CHECK WIRE HARNESS (THROTTLE POSITION SENSOR - ECM)
1. Disconnect the T13 throttle position sensor connector.
2. Disconnect the E7 ECM connector.
3. Measure the resistance of the wire harness side connectors.
  
  Fig 1: Identifying Throttle Position Sensor And ECM Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 2: Throttle Position Sensor Resistance Values
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
2. OK: GO TO NEXT STEP.

INSPECT ECM (VC VOLTAGE)

Disconnect the T13 throttle position sensor connector.
Turn the ignition switch ON.

Measure the voltage of the ECM connector.

Fig 3: Identifying E7 ECM Connector Terminals

G02907809

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard:

TESTER CONNECTION AND CONDITION SPECIFICATIONS

Tester Connection	Specified Condition
E7-18 (VC) - E7-28 (E2)	4.5 to 5.5 V

NG: REPLACE ECM (See REPLACEMENT )
OK: GO TO NEXT STEP.

REPLACE THROTTLE BODY ASSY (See REPLACEMENT )
1. GO TO NEXT STEP.

READ OUTPUT DTC (THROTTLE POSITION SENSOR DTCS ARE OUTPUT AGAIN)

Clear the DTC (see DTC CHECK/CLEAR ).
Start the engine.
Run the engine at idle for 15 seconds or more.

Read the DTC.

Result:

DTC RESULT

Display (DTC Output)	Proceed to
P0120, P0122, P0123, P0220, P0222, P0223 and/or P2135 are output again	A
No DTC output	B

B: SYSTEM OK
A: GO TO NEXT STEP.
REPLACE ECM (See REPLACEMENT )