Inspection Procedure

HINT:

• If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical systems.
• Check the engine speed. The engine speed can be checked using the Techstream. To check, follow the operation below:
  1. Connect the Techstream to the DLC3.
  2. Start the engine.
  3. Turn the Techstream on.
  4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.

     The engine speed may be indicated as zero despite the engine rotating normally. This is caused by a lack of NE signals from the crankshaft position sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the crankshaft position sensor output voltage is insufficient.

• 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 VALUE USING TECHSTREAM (ENGINE SPEED) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.
   5. Start the engine.
   6. Read the values displayed on the Techstream while the engine is running.

   OK: 

   Correct values are displayed. 

   HINT:

   • To check the engine speed change, display the graph on the Techstream.
   • If the engine does not start, check the engine speed while cranking.
   • If the engine speed indicated on the Techstream remains at zero (0), there may be an open or short in the crankshaft position sensor circuit.

   NG: Go to step 2 

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

2. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE) 
   1. Disconnect the crankshaft position sensor connector.
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE
      
      

      Tester Connection	Condition	Specified Condition
      1 - 2	20°C (68°F)	1150 to 1450 Ω

   3. Reconnect the crankshaft position sensor connector.

   NG: REPLACE CRANKSHAFT POSITION SENSOR  (See CRANKSHAFT POSITION SENSOR )

   Fig 1: Identifying Crankshaft Position Sensor Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

3. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) 
   1. Disconnect the crankshaft position sensor connector.
   2. Disconnect the ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open) 

      RESISTANCE REFERENCE
      
      

      Tester Connection	Condition	Specified Condition
      B65-1 - B31-122 (NE+)	Always	Below 1 Ω
      B65-2 - B31-121 (NE-)	Always	Below 1 Ω

      Standard Resistance (Check for Short) 

      RESISTANCE REFERENCE
      
      

      Tester Connection	Condition	Specified Condition
      B65-1 or B31-122 (NE+) - Body ground	Always	10 kΩ or higher
      B65-2 or B31-121 (NE-) - Body ground	Always	10 kΩ or higher

   4. Reconnect the crankshaft position sensor connector.
   5. Reconnect the ECM connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) 

   Fig 2: Identifying Crankshaft Position Sensor Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

4. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) 
   1. Check the crankshaft position sensor installation.

   OK: 

   Sensor is installed correctly. 

   NG: SECURELY REINSTALL SENSOR  (See REMOVAL )

   Fig 3: Identifying Crankshaft Position Sensor Clearance

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

5. INSPECT CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE) 
   1. Check the teeth of the sensor plate.

   OK: 

   Sensor plate does not have any cracks or deformation. 

   NG: REPLACE CRANKSHAFT POSITION SENSOR PLATE  (See ENGINE UNIT )

   OK: Go to next step 

6. REPLACE CRANKSHAFT POSITION SENSOR 
   1. Replace crankshaft position sensor (See CRANKSHAFT POSITION SENSOR ).
7. CHECK WHETHER DTC OUTPUT RECURS 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Clear the DTCs (See DTC CHECK / CLEAR ).
   5. Start the engine.
   6. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
   7. Read DTCs.

   Result 

   DTC RESULT REFERENCE
   
   

   Result	Proceed to
   No output	A
   P0335 or P0339	B

   HINT:

   If the engine does not start, replace the ECM.

   B: REPLACE ECM  (See ECM )

   A: END