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 Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1. READ OUTPUT DTC 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to the ON position.
   3. Turn the Techstream on.
   4. On the Techstream, select the following menu items: Powertrain/Engine and ECT/Trouble Codes.
   5. Read the DTCs.

      Result 

      RESULT CHART
      
      

      Display (DTC Output)	Proceed to
      P0115	A
      P0117	B
      P0118	C

   B: Go to step  5

   C: Go to step  3

   A: Go to next step 

2. READ VALUE USING TECHSTREAM (ENGINE COOLANT TEMPERATURE) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to the ON position.
   3. Turn the Techstream on.
   4. On the Techstream, select the following menu items: Powertrain/Engine and ECT/Data List/All Data/Coolant Temp.
   5. Read the value displayed on the Techstream.

      Standard temperature: 

      Between 80°C and 97°C (176°F and 207°F) with warm engine. 

      Result 

      RESULT CHART
      
      

      Temperature Displayed	Proceed to
      -40°C (-40°F)	A
      140°C (284°F)	B
      Between 80°C and 97°C (176°F and 207°F)	C

      HINT:

      • If there is an open circuit, the Techstream indicates 40°C (-40°F).
      • If there is a short circuit, the Techstream indicates 140°C (284°F).

   B: Go to step  5

   C: CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS   ) 

   A: Go to next step 

3. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) 
   1. Disconnect the E2 engine coolant temperature (ECT) sensor connector.
   2. Connect terminals 1 and 2 of the ECT sensor connector on the wire harness side.
   3. Connect the Techstream to the DLC3.
   4. Turn the ignition switch to the ON position.
   5. Turn the Techstream on.
   6. On the Techstream, select the following menu items: Powertrain/Engine and ECT/Data List/All Data/Coolant Temp.
   7. Read the value displayed on the Techstream.

      Standard temperature: 

      140°C (284°F) 

   8. Reconnect the ECT sensor connector.

   OK: CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR 

   NG: Go to next step 

   Fig 1: Checking For Open In Wire Harness

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN ECM) 
   1. Disconnect the E2 ECT sensor connector.
   2. Connect terminals THW and E2 of the E8 ECM connector.

      HINT:

      Before checking, perform visual and contact pressure checks on the ECM connector.

   3. Connect the Techstream to the DLC3.
   4. Turn the ignition switch to the ON position.
   5. Turn the Techstream on.
   6. Enter the following menus: Powertrain/Engine and ECT/Data List/All Data/Coolant Temp.
   7. Read the value displayed on the Techstream.

      Standard temperature: 

      140°C (284°F) 

   8. Reconnect the ECT sensor connector.

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   NG: CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM 

   Fig 2: Checking For Open In ECM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) 
   1. Disconnect the E2 ECT sensor connector.
   2. Connect the Techstream to the DLC3.
   3. Turn the ignition switch to the ON position.
   4. Turn the Techstream on.
   5. On the Techstream, select the following menu items: Powertrain/Engine and ECT/Data List/All Data/Coolant Temp.
   6. Read the value displayed on the Techstream.

      Standard temperature: 

      -40°C (-40°F) 

   7. Reconnect the ECT sensor connector.

   OK: REPLACE ENGINE COOLANT TEMPERATURE SENSOR  (See REMOVAL )

   NG: Go to next step 

   Fig 3: Checking For Short In Wire Harness

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN ECM) 
   1. Disconnect the E8 ECM connector.
   2. Connect the Techstream to the DLC3.
   3. Turn the ignition switch to the ON position.
   4. Turn the Techstream on.
   5. On the Techstream, select the following menu items: Powertrain/Engine and ECT/Data List/All Data/Coolant Temp.
   6. Read the value displayed on the Techstream.

      Standard temperature: 

      -40°C (-40°F) 

   7. Reconnect the ECM connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM  (See REMOVAL )

   Fig 4: Checking For Short In ECM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002