Inspection Procedure

HINT:

• The following troubleshooting flowchart is based on the premise that the engine is cranked normally. If the engine will not crank, proceed to the (See PROBLEM SYMPTOMS TABLE ).
• Read freeze frame data using the Techstream. Freeze frame data records 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 (STARTER SIGNAL) 
   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 and ECT / Data List / All Data / Starter Signal.
   4. Check the value displayed on the Techstream when the engine switch is turned to the START positions.

      OK 

      ENGINE SWITCH POSITION
      
      

      Engine Switch Position	Starter Signal
      On (IG)	OFF
      START	ON

   NG: Go to step 2 

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

2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
   1. Disconnect the C19 PNP switch connector.
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      4 (B) - 5 (L)	Shift lever in P	Below 1 Ω
      	Shift lever in N	Below 1 Ω
      	Shift lever not in P and N	10 kΩ or higher

   NG: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY  (See REMOVAL )

   Fig 1: Identifying Park/Neutral Position Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step. 

3. CHECK HARNESS AND CONNECTOR (PNP SWITCH - ECM) 
   1. Disconnect the C19 PNP switch connector.
   2. Disconnect the A38 ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      C19-5 - A38-46 (STA)	Always	Below 1 Ω
      C19-5 or A38-46 (STA) - Body ground	Always	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 2: Identifying C19 PNP Switch And A38 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: GO TO CRANKING HOLDING FUNCTION CIRCUIT  (See CRANKING HOLDING FUNCTION CIRCUIT )