Inspection Procedure

HINT:

Read freeze frame data using the hand-held tester or the OBD II 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 CAMSHAFT POSITION SENSOR (RESISTANCE) 
   1. Disconnect the C1 sensor connector.
   2. Measure the resistance between the terminals of the sensor.
      Fig 1: Identifying Camshaft Position Sensor Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION AND CONDITION SPECIFICATIONS
      
      

      Tester Connection	Condition	Specified Condition
      1 - 2	Cold	835 to 1,400 Ω.
      1 - 2	Hot	1,060 to 1,645 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 Signal Waveform Test Terminals

      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 CAMSHAFT POSITION SENSOR 
   2. OK: GO TO NEXT STEP. 
2. CHECK WIRE HARNESS (CAMSHAFT POSITION SENSOR - ECM) 
   1. Disconnect the C1 sensor connector.
   2. Disconnect the E9 ECM connector.
   3. Measure the resistance of the wire harness side connectors.
      Fig 3: Identifying Camshaft Position Sensor And ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION AND CONDITION SPECIFICATIONS
      
      

      Tester Connection	Specified Condition
      C1-1 - E9-27 (G2+) C1-2 - E9-24 (NE-)	Below 1 Ω
      C1-1 C1-2 or E9-27 (G2+) - Body ground or E9-24 (NE-) - Body ground	10 kΩ or higher

   1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
   2. OK: GO TO NEXT STEP. 
3. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR) 
   1. Check the sensor installation.

      OK: Sensor is installed correctly. 

   1. NG: TIGHTEN SENSOR 
   2. OK: GO TO NEXT STEP. 
4. INSPECT CAMSHAFT 
   1. Remove the camshafts (See REPLACEMENT ).
   2. Check the camshaft lobes.

      OK: The camshaft lobes do not have any cracks or deformation. 

   1. NG: REPLACE CAMSHAFT 
   2. OK: REPLACE ECM (See  REPLACEMENT  )