Inspection Procedure

HINT:

• The following troubleshooting flowchart is based on the premise that the engine is cranked normally. If the engine does not crank, proceed to the PROBLEM SYMPTOMS TABLE .
• Read freeze frame data using 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 (See FREEZE FRAME DATA ).

1. READ VALUE OF TECHSTREAM (STARTER SIGNAL) 
   1. Connect Techstream to the DLC3.
   2. Turn the engine switch on (IG) and turn the tester on.
   3. Enter the following menus: Powertrain / Engine / Data List/Starter Signal.
   4. Check the value displayed on the tester when the engine switch is turned on (IG) and the engine is started.

      OK 

      ENGINE SWITCH REFERENCE
      
      

      Item	Engine switch on (IG)	Engine start
      Starter Signal	OFF	ON

   OK: REPLACE ECM (See  REMOVAL  ) 

   NG: Go to next step 

2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
   1. Inspect the Park/Neutral Position (PNP) switch.
      1. Disconnect the B36 switch connector.
      2. Measure the resistance according to the value(s) in the table below.

         Standard Resistance 

         TESTER CONNECTION SPECIFIED CONDITION CHART
         
         

         Gear Selector Lever Position	Tester Connection	Specified Condition
         P	4 - 5	Below 1 Ω
         N	4 - 5	Below 1 Ω

      3. Reconnect the PNP switch connector.

         Result 

         RESULT CHART
         
         

         Result	Proceed to
         OK	A
         NG	B

         Fig 1: Identifying Terminals Of B36 Park/Neutral Position Switch Connector

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   B: REPLACE PARK/NEUTRAL POSITION SWITCH (THEN CHECK CRANKING HOLDING FUNCTION CIRCUIT)  (See REMOVAL )

   A: CHECK CRANKING HOLDING FUNCTION CIRCUIT (See  INSPECTION PROCEDURE  )