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) 
   Fig 1: Identifying Camshaft Position Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Measure the resistance between the terminals of camshaft position sensor connector.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      1-2	1,630 to 2,740 Ω at cold
      	2,065 to 3,225 Ω at hot

      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).
   • NG : REPLACE CAMSHAFT POSITION SENSOR 
   • 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.
      Fig 2: Identifying Camshaft Position Sensor Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for open): 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      G+(C1-1)-G22+(E3-26)	Below 1 Ω
      G-(C1-2)-NE-(E3-34)

      Standard (Check for short): 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      G+(C1-1) or G22+(E3-26)-Body ground	10 kΩ or higher
      G-(C1-2) or NE-(E3-34)-Body ground

   4. Reconnect the ECM connector.
   5. Reconnect the camshaft position sensor connector.
   Fig 3: Identifying ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
   • OK : GO TO NEXT STEP 
3. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR) 
   1. Check the camshaft position sensor installation.
   • NG : TIGHTEN SENSOR 
   • OK : GO TO NEXT STEP 
4. CHECK CAMSHAFT TIMING GEAR ASSY (TEETH OF PLATE) 
   1. Check the teeth of the signal plate.
   • NG : REPLACE CAMSHAFT TIMING GEAR ASSY 
   • OK : REPLACE ECM (See  REPLACEMENT  )