Inspection Procedure

HINT:

• Read values on the hand-held tester or OBD II scan tool.
  1. Connect the hand-held tester or the OBD II scan tool to the DLC3.
  2. Start the engine and push the hand-held tester or the OBD II scan tool main switch ON.
  3. Enter the following menus: DIAGNOSIS/ENHANCED OBD II/DATA LIST/ALL/ENGINE SPD.
• The engine speed can be confirmed in DATA LIST using the hand-held tester or OBD II scan tool. If there are no NE signals from the crankshaft position sensor despite the engine revolving, the engine speed will be indicated as zero. If voltage output of the crankshaft position sensor is insufficient, the engine speed will be indicated as lower than the actual rpm.
• Read freeze frame data using the hand-held tester or the OBDII scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE) 
   1. Disconnect the C7 sensor connector.
   2. Measure the resistance between the terminals of the sensor.
      Fig 1: Identifying Crankshaft Position Sensor Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION AND CONDITION SPECIFICATIONS
      
      

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

      NOTE: In the above section, the terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10°C to 50°C (14°F to 122°F). "Hot" means approximately 50°C to 100°C (122°F to 212°F).

      HINT:

      Reference: Inspection using an oscilloscope. During cranking or idling, check the waveform between the terminals of the ECM connector.

      Fig 2: Identifying ECM Connector Signal Waveform Test Terminalss

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION AND CONDITION SPECIFICATIONS
      
      

      Tester Connection	Specified Condition
      E9-27 (G2+) - E9-24 (NE-) E9-25 (NE+) - E9-24 (NE-)	Correct waveform is as shown

   1. NG: REPLACE CRANKSHAFT POSITION SENSOR 
   2. OK: GO TO NEXT STEP. 
2. CHECK WIRE HARNESS (CRANKSHAFT POSITION SENSOR - ECM) 
   1. Disconnect the C7 sensor connector.
   2. Disconnect the E9 ECM connector.
   3. Measure the resistance of the wire harness side connectors.
      Fig 3: Identifying Crankshaft Position Sensor And ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Fig 4: Resistance Test Results

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
   2. OK: GO TO NEXT STEP. 
3. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) 
   1. Check the crankshaft position sensor installation.

   OK: Sensor is installed correctly. 

   1. NG: TIGHTEN SENSOR 
   2. OK: GO TO NEXT STEP. 
4. INSPECT CRANKSHAFT POSITION SENSOR PLATE NO.1 (TEETH OF SIGNAL PLATE) 
   1. Remove the crankshaft position sensor plate No. 1 (See OVERHAUL ).
   2. Check the teeth of the signal plate.

   OK: The pulley does not have any cracks or deformation. 

   1. NG: REPLACE CRANKSHAFT POSITION SENSOR PLATE NO.1 
   2. OK: REPLACE ECM (See  REPLACEMENT  )