Inspection Procedure

HINT:

• If DTCs P0110, P0115 and P0120 are output simultaneously, E2 (sensor ground) bay be open.
• Read freeze frame data using OBD II scan tool or hand-held tester. Because freeze frame records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

1. Connect OBD II scan tool or hand-held tester, and read throttle valve opening percentage. 

   PREPARATION: 

   1. Connect the OBD II scan tool or hand-held tester to the DLC3.
   2. Turn the ignition switch ON and push the OBD II scan tool or hand-held tester main switch ON.

   CHECK: 

   Read the throttle valve opening percentage.

   OK: 

   Fig 1: Reading Throttle Valve Opening Percentage On Hand-Held Tester While Operating Accelerator Pedal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   THROTTLE VALVE SPECIFICATION
   
   

   Throttle Valve	Throttle valve opening position expressed as percentage
   Fully open	Approx. 75%
   Fully closed	Approx. 10%

   1. OK: Check for intermittent problems (See  PRE-CHECK  ). 
   2. NG: Go to next step. 
2. Check voltage between terminal 1 of wire harness side connector and body ground. 

   PREPARATION: 

   1. Disconnect the throttle position sensor connector.
   2. Turn the ignition switch ON.

   CHECK: 

   Measure the voltage between terminal 1 (VC) of the wire harness side connector and body ground.

   OK: 

   Voltage: 4.5 - 5.5 V 

   Fig 2: Checking Voltage Between Terminal 1 (VC) Of Wire Harness Side Connector & Body Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: Go to Step   5 . 
   2. OK: Go to next step. 
3. Check throttle position sensor (See  THROTTLE BODY  ). 
   1. NG: Replace throttle position sensor. 
   2. OK: Go to next step. 
4. Check voltage between terminals VTA1 and E2 of ECM connector. 

   PREPARATION: 

   1. Remove the glove compartment (See ENGINE CONTROL MODULE (ECM) ).
   2. Turn the ignition switch ON.

   CHECK: 

   Measure the voltage between terminals VTA1 and E2 of the ECM connector.

   OK: 

   Fig 3: Checking Voltage Terminals VTA1 And E2 Of ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   THROTTLE VALVE SPECIFICATION
   
   

   Throttle Valve	Voltage
   Fully closed	0.3 - 1.0 V
   Fully open	3.5 - 4.5 V

   1. NG: Check for open and short in harness and connector in VTA circuit between ECM and throttle position sensor (See  PROCEDURE  ). 
   2. OK: Check and replace ECM (See  PROCEDURE  ). 
5. Check voltage between terminals VC and E2 of ECM connector. 

   PREPARATION: 

   1. Remove the glove compartment (See ENGINE CONTROL MODULE (ECM) ).
   2. Turn the ignition switch ON.

   CHECK: 

   Measure the voltage between terminals VC and E2 of the ECM connector.

   OK: 

   Voltage: 4.5 - 5.5 V 

   Fig 4: Checking Voltage Between Terminals VC And E2 Of ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: Check and replace ECM (See  PROCEDURE  ).  
   2. OK: Check for open in harness and connector in VC circuit between ECM and throttle position sensor (See  PROCEDURE  ).