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 Techstream To check, follow the operation below
  1. Connect the Techstream to the DLC3.
  2. Start the engine
  3. Turn the Techstream ON
  4. Enter the following menus Powertrain / Engine / Data List / 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 sensor Alternatively, the engine speed may be indicated as lower than the actual engine speed, if the crankshaft position sensor output voltage is insufficient.

• Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction

1. READ VALUE USING TECHSTREAM (ENGINE SPEED) 
   1. Connect the Techstream to the DLC3
   2. Turn the engine switch on (IG) and turn the Techstream ON
   3. Enter the following menus Powertrain / Engine / Data List / Engine Speed
   4. Star the engine
   5. Read the values displayed on the Techstream while the engine is running

      Standard: Correct values are displayed. 

      HINT

      • To check the engine speed change, display the graph on the Techstream
      • If the engine does not start, check the engine speed while cranking
      • If the engine speed indicated on the Techstream remains zero (O), there may be an open or short in the crankshaft position sensor circuit

        Result 

        RESULT CHART
        
        

        Result	Proceed to
        NG	A
        OK	B

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

   A: Go to Next Step 

2. INSPECT CRANKSHAFT POSITION SENSOR (SENSOR POWER SOURCE) 
   1. Disconnect the crankshaft position sensor connector.
   2. Measure the voltage according to the value(s) in the table below

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Switch Condition	Specified Condition
      z4-3 (VC) - Body ground	Engine switch on (IG)	4.5 to 5 0 V

   3. Reconnect the crankshaft position sensor connector.
   Fig 1: Identifying Crankshaft Position Sensor Connector Z4
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: Go to step  8

   OK: Go to Next Step 

3. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) 
   1. Disconnect the crankshaft position sensor connector
   2. Disconnect the ECM connector
   3. Measure the resistance according to the value(s) in the table below

      Standard Resistance (Check for Open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      Z4-1 (NE) - E3-27 (NE+)	Always	Below 1 Ω
      Z4-2 (NE-) - E3-34 (NE-)	Always	Below 1 Ω

      Standard Resistance (Check for Short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      z4-1 (NE) or E3-27 (NE+) - Body ground	Always	10 kΩ or higher
      z4-2 (NE-) or E3-34 (NE-) - Body ground	Always	10 kΩ, or higher

   4. Reconnect the crankshaft position sensor connector and ECM connector
   Fig 2: Identifying Crankshaft Position Sensor Connector Z4 And ECM Connector E3
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

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

      OK: Sensor is installed correctly. 

      Fig 3: Locating Crankshaft Position Sensor Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE CRANKSHAFT POSITION SENSOR  (See REMOVAL )

   OK: Go to Next Step 

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

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

   NG: REPLACE CRANKSHAFT ANGLE SENSOR ROTOR  (See REMOVAL )

   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, P0337, P0338 AND/OR P0339) 
   1. Connect the Techstream to the DLC3
   2. Turn the engine switch on (IG).
   3. Turn the Techstream ON.
   4. Clear DTCs (See DTC CHECK/CLEAR )
   5. Start the engine
   6. Enter the following menus Powertrain / Engine / Trouble Codes
   7. Read the DTCs

      Result 

      RESULT CHART
      
      

      Display (DTC Output)	Proceed to
      No output	A
      P0335, P0337, P0338 and/or P0339	B

      HINT.

      If the engine does not start, replace the ECM

   B: REPLACE ECM  (See REMOVAL )

   A: END 

8. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) 
   1. Disconnect the crankshaft position sensor connector
   2. Disconnect the ECM connector.
   3. Measure the resistance according to the value(s) in the table below

      Standard Resistance (Check for Open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      z4-3(VC) - E3-18(VC)	Always	Below 1 Ω

      Standard Resistance (Check for Short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      z4-3(VC) or E3-18(VC) - Body ground	Always	10 kΩ or higher

   4. Reconnect the crankshaft position sensor connector and ECM connector.
   Fig 4: Identifying Crankshaft Position Sensor Connector Z4 And ECM Connector E3
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM  (See REMOVAL )