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, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

1. INSPECT CAMSHAFT POSITION SENSOR (RESISTANCE) 
   1. Measure the resistance between the terminals of camshaft position sensor connector.

      Resistance: 

      Fig 1: Tester Connection Specified Condition Table

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: "Cold" and "Hot" shown above mean the temperature of the coils themselves. "Cold" is from -10°C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).
      Fig 2: Identifying Front View Camshaft Position Sensor

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPLACE CAMSHAFT POSITION SENSOR 
   2. OK: Go to next step. 
2. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM) 
   1. Disconnect the C1 camshaft position sensor connector.
   2. Disconnect the E3 ECM connector.
   3. Check the resistance between the wire harness side connectors.

      Standard (Check for open): 

      Fig 3: Tester Connection Specified Condition Table (Open)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 4: Locating Camshaft Position Sensor Connector Terminal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      Fig 5: Tester Connection Specified Condition Table

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Reconnect the ECM connector.
   5. Reconnect the camshaft position sensor connector.
      Fig 6: Disconnecting E3 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: Go to next step. 
3. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR) 
   1. Check the camshaft position sensor installation.
   1. NG: SECURELY REINSTALL SENSOR 
   2. OK: Go to next step. 
4. CHECK CAMSHAFT TIMING GEAR ASSY (TEETH OF PLATE) 
   1. Check the teeth of the signal plate.
   1. NG: REPLACE CAMSHAFT TIMING GEAR ASSY 
   2. OK: REPLACE ECM (See  REPLACEMENT  )