Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are 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. CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE) 
   1. Disconnect the C31 camshaft position sensor connector.
   2. Turn the ignition switch ON.
   3. Measure the voltage between terminal 3 of the camshaft position sensor connector and body ground.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      C31-3 - Body ground	4.5 to 5.0 V

   4. Reconnect the camshaft position sensor connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 1: Checking Harness And Connector (Sensor Power Source)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: GO TO Next Step 

2. CHECK ECM TERMINAL VOLTAGE 
   1. Inspect the ECM using an oscilloscope.
   Fig 2: Checking ECM Terminal Voltage

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. While the engine is idling, check the waveform between the terminals of the ECM connector.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   E7-19 (G2+) - E7-29 (G2-)	Correct waveform is as shown
   HINT: *1: Crank angle *2: 180° *3: 120° *4: 60°

   OK: REPLACE ECM 

   Fig 3: Identifying Signal Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: GO TO Next Step 

3. CHECK HARNESS AND CONNECTOR (ECM - CAMSHAFT POSITION SENSOR) 
   1. Check harness and connector (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: GO TO Next Step 

4. INSPECT SENSOR INSTALLATION 
   1. Check the camshaft position sensor installation.

   OK: The camshaft position sensor is installed properly. 

   NG: REPAIR OR REPLACE SENSOR 

   Fig 4: Identifying Clearance Between Camshaft Position Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: GO TO Next Step 

5. INSPECT CAMSHAFT TIMING PULLEY LH (SIGNAL PLATE TOOTH) 

   NG: REPLACE CAMSHAFT TIMING PULLEY LH 

   OK: REPLACE CAMSHAFT POSITION SENSOR