Inspection Procedure

HINT:

• If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.
• Check the engine speed. The engine speed can be checked by using the intelligent tester. To check, follow the operation below:
  1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
  2. Start the engine.
  3. Turn the tester ON.
  4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / ENGINE SPD.
• The engine speed may be indicated as zero despite the engine revolving normally. This is caused by a lack of NE signals from the crankshaft position (CKP) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the CKP sensor output voltage is insufficient.
• 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. INSPECT CRANKSHAFT POSITION SENSOR 
   1. Disconnect the C3 Crankshaft Position (CKP) sensor connector.
   2. Measure the resistance of the sensor.

      Standard resistance 

      CRANKSHAFT POSITION SENSOR
      
      

      Tester Connection	Condition	Specified Condition
      1 - 2	Cold	1,630 to 2,740 Ω
      1 - 2	Hot	2,065 to 3,225 Ω

      Fig 1: Inspecting Crankshaft Position Sensor

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: In CRANKSHAFT POSITION SENSOR  , the terms "cold" and "hot" refer to the temperature of the coils.
      "Cold" means approximately -10 to 50°C (14 to 122°F).
      "Hot" means approximately 50 to 100°C (122 to 212°F).

   NG: REPLACE CRANKSHAFT POSITION SENSOR 

   OK: GO TO NEXT STEP 

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

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: GO TO NEXT STEP 

3. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) 
   1. Check the sensor installation.

      OK: Sensor is installed correctly. 

   Fig 2: Checking Sensor Installation (Crankshaft Position Sensor)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: SECURELY REINSTALL SENSOR 

   OK: GO TO NEXT STEP 

4. CHECK CRANKSHAFT POSITION SENSOR PLATE (TOOTH OF PLATE) 
   1. Remove the crankshaft position sensor plate (see step 26 in REMOVAL ).
   2. Check the tooth of the signal plate.

      OK: Sensor plate does not have any cracks or deformation. 

   NG: REPLACE CRANKSHAFT POSITION SENSOR PLATE 

   OK: REPLACE ECM