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 by using Techstream. To check, follow the operation below:
  1. Connect Techstream to the DLC3.
  2. Start the engine.
  3. Turn the tester ON.
  4. Select the following menu items: Powertrain / Engine and ECT / Data List / Engine Speed.

     The engine speed may be indicated as zero despite the engine revolving normally. This is caused by a lack of NE signals from the Crankshaft Position (CKP) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the CKP sensor output voltage is insufficient.

• Read freeze frame data using Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, 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.

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

      Standard: 

      Correct values are displayed. 

      HINT:

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

   OK: CHECK FOR INTERMITTENT PROBLEMS 

   NG: Go to next step 

2. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE) 
   1. Disconnect the B46 CKP sensor connector.
   Fig 1: Identifying CKP Sensor Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Measure the resistance between terminals 1 and 2.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      1 - 2	Cold	985 to 1, 600 Ω
      1 - 2	Hot	1, 265 to 1, 890 Ω

      HINT:

      The terms "Cold" and "Hot" refer to the temperature of the sensor. Cold means approximately -10 to 50°C (14 to 122°F). Hot means approximately 50 to 100°C (122 to 212°F).

   3. Reconnect the CKP sensor connector.

   NG: REPLACE CRANKSHAFT POSITION SENSOR 

   OK: Go to next step 

3. CHECK WIRE HARNESS (CRANKSHAFT POSITION SENSOR - ECM) 
   Fig 2: Identifying Wire Harness (Crankshaft Position Sensor - ECM)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the B46 CKP sensor connector.
   2. Disconnect the B30 ECM connector.
   3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      B46-1 (NE+) - B30-110 (NE+)	Below 1 Ω
      B46-2 (NE-) - B30-111 (NE-)	Below 1 Ω
      B46-1 (NE+) or B30-110 (NE+) - Body ground	10 kΩ or higher
      B46-2 (NE-) or B30-111 (NE-) - Body ground	10 kΩ or higher

   4. Reconnect the ECM connector.
   5. Reconnect the CKP sensor connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

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

      OK: 

      Sensor is installed correctly. 

      Fig 3: Checking CKP Sensor Installation

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: SECURELY REINSTALL SENSOR 

   OK: Go to next step 

5. CHECK 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 

   OK: Go to next step 

6. REPLACE CRANKSHAFT POSITION SENSOR 
7. CHECK WHETHER DTC OUTPUT RECURS 
   1. Connect Techstream to the DLC3.
   2. Turn the ignition switch ON.
   3. Turn the tester ON.
   4. Clear DTCs (see DTC CHECK / CLEAR  ).
   5. Start-the engine.
   6. Select the following menu items: Powertrain / Engine and ECT / Trouble Code.
   7. Read DTCs.

      Result 

      RESULT CHART
      
      

      Display (DTC Output)	Proceed to
      No output	A
      P0335 or P0339	B

      HINT:

      If the engine does not start, replace the ECM.

   B: REPLACE ECM 

   A: END