Inspection Procedure

HINT:

Read freeze frame data using the hand - held tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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. INSPECT FUSE (ETCS) 
   1. Remove the ETCS fuse from the engine room Relay Block (R/B).
      Fig 1: Removing ETCS Fuse From Engine Room Relay Block (R/B)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Measure the resistance in the ETCS fuse.

      Standard: Below 1 Ω 

      If the fuse is open, replace the fuse.

   1. NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED FUSE 
   2. OK: Go to next step. 
2. READ VALUE OF HAND-HELD TESTER (+BM VOLTAGE) 
   1. Connect the hand-held tester to the Controller Area Network Vehicle Interface Module (CAN VIM). Then connect the CAN VIM to the DLC3.
   2. Turn the ignition switch ON.
   3. Enter the following menus: DIAGNOSIS/ ENHANCED OBD II/ DATA LIST/ ALL/ +BM.

      Standard: 9 to 14 V 

   1. OK: CHECK FOR INTERMITTENT PROBLEM (See  CHECK FOR INTERMITTENT PROBLEMS   ) 
   2. NG: Go to next step. 
3. CHECK WIRE HARNESS (ECM - BATTERY - ETCS FUSE) 
   1. Check the wire harness between the ETCS fuse the battery positive terminal and the ECM.
      1. Remove the ETCS fuse from the engine room R/B.
         Fig 2: Removing ETCS Fuse

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect the E5 ECM connector.
         Fig 3: Disconnecting E5 ECM Connector

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Measure the resistance of the wire harness side connectors.

         Standard: 

         Fig 4: Resistance Condition Chart

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
   2. OK: Go to next step. 

      REPLACE ECM (SEE  REPLACEMENT  )