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 problem symptoms table (See 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.

1. READ VALUE OF TECHSTREAM (STARTER SIGNAL) 
   1. Connect Techstream to the DLC3.
   2. Turn the ignition switch to the ON position and turn the tester on.
   3. Select the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal.
   4. Check the value displayed on the tester when the ignition switch is turned to the ON position and START position.

      OK 

      RESULT REFERENCE
      
      

      Ignition Switch Positions	Starter Signal
      ON	OFF
      START	ON

   OK: CHECK FOR INTERMITTENT PROBLEMS 

   NG: Go to Next Step 

2. INSPECT PARK/NEUTRAL POSITION SWITCH 
   1. Inspect the Park/Neutral Position (PNP) switch.
      1. Disconnect the P1 PNP switch connector.
      Fig 1: Identifying P1 PNP Switch Connector
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Measure the resistance according to the value(s) in the table below.

         Standard resistance 

         RESISTANCE SPECIFIED CONDITIONS
         
         

         Shift Position	Tester Connection	Specified Condition
         P	2 - 6, 4 - 5	Below 1 Ω
         R	1 - 2	Below 1 Ω
         N	2 - 9, 4 - 5	Below 1 Ω
         D	2 - 7	Below 1 Ω
         2	2 - 3	Below 1 Ω
         L	2 - 8	Below 1 Ω

      3. Reconnect the PNP switch connector.

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

   OK: Go to Next Step 

3. READ VALUE OF TECHSTREAM (STARTER SIGNAL) 
   1. Connect Techstream to the DLC3.
   2. Turn the ignition switch to the ON position and turn the tester on.
   3. Select the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal.
   4. Check the value displayed on the tester when the ignition switch is turned to the ON position and the START position.

      OK 

      RESULT REFERENCE
      
      

      Ignition Switch Positions	STARTER SIG
      ON	OFF
      START	ON

   OK: SYSTEM OK 

   NG: Go to Next Step 

4. INSPECT IGNITION SWITCH ASSEMBLY 
   1. Disconnect the I15 ignition switch connector.
   Fig 2: Identifying I15 Ignition Switch Connector
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS
      
      

      Switch Condition	Terminal No.	Specified Condition
      LOCK	All Terminals	10 kΩ or higher
      ACC	1 - 3	Below 1 Ω
      ON	1 - 2, 1 - 3, 2 - 3, 5 - 6
      START	4 - 5, 4 - 6, 5 - 6, 1 - 2

   3. Reconnect the ignition switch connector.

   NG: REPLACE IGNITION SWITCH ASSEMBLY (GO TO NEXT STEP 5 AFTER REPLACEMENT)  (See REMOVAL )

   OK: Go to Next Step 

5. READ VALUE OF TECHSTREAM (STARTER SIGNAL) 
   1. Connect Techstream to the DLC3.
   2. Turn the ignition switch to the ON position and turn the tester on.
   3. Select the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal.
   4. Check the value displayed on the tester when the ignition switch is turned to the ON position and the START position.

      OK 

      RESULT REFERENCE
      
      

      Ignition Switch Positions	STARTER SIG
      ON	OFF
      START	ON

   OK: SYSTEM OK 

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (PNP SWITCH - STA TERMINAL OF ECM)