Inspection Procedure

HINT:

• If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical systems.
• Check the engine speed. The engine speed can be checked by using a Techstream. To check, follow the operation below:
  1. Connect the Techstream to the DLC3.
  2. Start the engine.
  3. Turn the tester ON
  4. Select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Engine Speed. 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 Techstream. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, 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. READ VALUE USING TECHSTREAM (ENGINE SPEED) 
   1. Connect a Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the tester ON.
   4. Select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Engine Speed.
   5. Start the engine.
   6. Read the values displayed on the tester while the engine is running.

      Standard: 

      Correct values are displayed. 

      HINT:

      • To check the engine speed change, display the graph on the tester.
      • If the engine does not start, check the engine speed while cranking.
      • If the engine speed indicated on the tester remains zero (0), there may be an open or short in the Crankshaft Position (CKP) sensor circuit.

   OK: CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS   ) 

   NG: Go to next step 

2. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE) 
   1. Disconnect the C2 CKP sensor connector.
   Fig 1: Identifying CKP Sensor Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Measure the resistance between terminals 1 and 2.

      Standard resistance 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART
      
      

      Tester Connections	Specified Conditions
      1 - 2	1150 to 1450 Ω at 25°C (77°F)

   3. Reconnect the CKP sensor connector.

   NG: REPLACE CRANKSHAFT POSITION SENSOR (See  REMOVAL   ) 

   OK: Go to next step 

3. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) 
   1. Disconnect the C2 CKP sensor connector.
   Fig 2: Identifying C2 CKP Sensor And C20 ECM Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Disconnect the C20 ECM connector.
   3. Check the resistance.

      Standard resistance (Check for open) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART
      
      

      Tester Connections	Specified Conditions
      NE+ (C2-1) - NE+ (C20-122)	Below 1 Ω
      NE- (C2-2) - NE- (C20-121)

      Standard resistance (Check for short) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART
      
      

      Tester Connections	Specified Conditions
      NE+ (C2-1) or NE+ (C20-122) - Body ground	10 kΩ or higher
      NE- (C2-2) or NE- (C20-121) - Body ground

   4. Reconnect the ECM connector.
   5. Reconnect the CKP sensor connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

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

      OK: 

      Sensor is installed correctly. 

      Fig 3: Checking CKP Sensor Installation

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: SECURELY REINSTALL SENSOR (See  REMOVAL   ) 

   OK: Go to next step 

5. INSPECT CRANKSHAFT (TEETH OF SENSOR PLATE) 
   1. Check the teeth of the sensor plate.

      OK: 

      Sensor plate does not have any cracks or deformation. 

   NG: REPLACE CRANKSHAFT  (See DISASSEMBLY )

   OK: Go to next step 

6. REPLACE CRANKSHAFT POSITION SENSOR 
   1. Replace the crankshaft position sensor (See REMOVAL  ).
7. CHECK WHETHER DTC OUTPUT RECURS (DTC P0335 OR P0339) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the tester ON.
   4. Clear DTCs (See DTC CHECK/CLEAR  ).
   5. Start the engine.
   6. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
   7. Read DTCs.

      Result 

      RESULT CHART
      
      

      Display (DTC Output)	Proceed To
      No output	A
      P0335 or P0339	B

      HINT:

      If the engine does not start, replace the ECM.

   B: REPLACE ECM (See  REMOVAL   ) 

   A: END