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 on PROBLEM SYMPTOMS TABLE .
• Read freeze frame data using the hand-held tester. 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 HAND-HELD TESTER (STARTER SIGNAL) 
   1. Connect a hand-held tester to the DLC3.
   2. Turn the ignition switch on (IG) and turn the tester on.
   3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.
   4. Check the value displayed on the tester when the ignition switch is turned on (IG) and START positions.

      OK: 

      IGNITION SWITCH POSITION
      
      

      Ignition Switch Positions	ON	START
      STARTER SIG	OFF	ON

   1. OK: REPLACE ECM (SEE  REPLACEMENT  ) 
   2. NG: Go to next step. 
2. INSPECT PARK/NEUTRAL POSITION SWITCH 
   1. Inspect the Park/Neutral Position (PNP) switch.
      1. Disconnect the B13 PNP switch connector.
      2. Measure the resistance when the transmission gear selector lever is moved to each position.

         Standard: 

         TESTER CONNECTIONS
         
         

         Gear Selector Lever Positions	Tester Connections	Specified Conditions
         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.
         Fig 1: Identifying PNP Switch

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPLACE PARK/NEUTRAL POSITION SWITCH 
   2. OK: Go to next step. 
3. READ VALUE USING HAND-HELD TESTER (STARTER SIGNAL) 
   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch on (IG) and turn the tester on.
   3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.
   4. Check the value displayed on the tester when the ignition switch is turned on (IG) and engine start.

      OK: 

      IGNITION SWITCH POSITIONS
      
      

      Ignition Switch Positions	ON	START
      STARTER SIG	OFF	ON

   1. OK: SYSTEM OK 
   2. NG: Go to next step. 
4. INSPECT IGNITION OR STARTER SWITCH ASSY (SEE  INSPECTION  ) 
   1. NG: REPLACE IGNITION OR STARTER SWITCH ASSY 
   2. OK: Go to next step. 
5. READ VALUE USING HAND-HELD TESTER (STARTER SIGNAL) 
   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch on (IG) and turn the tester on.
   3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / STARTER SIG.
   4. Check the value displayed on the tester when the ignition switch is turned on (IG) and engine start.

      OK: 

      IGNITION SWITCH POSITIONS
      
      

      Ignition Switch Positions	ON	START
      STARTER SIG	OFF	ON

   1. OK: SYSTEM OK 
   2. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR