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 No. 1 R/B.
   2. Measure the resistance of the fuse.

      Standard: Below 1 Ω 

      Fig 1: Identifying ETCS Fuse Location

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPLACE FUSE 
   2. OK: Go to next step. 
2. READ DATA LIST (+BM VOLTAGE) 
   1. Connect the hand-held tester 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: See  CHECK FOR INTERMITTENT PROBLEMS  
   2. NG: Go to next step. 
3. CHECK WIRE HARNESS (ECM - ETCS FUSE - BATTERY) 
   1. Remove the ETCS fuse from the engine room No. 1 R/B.
   2. Disconnect the E6 ECM connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard: 

      RESISTANCE SPECIFICATIONS
      
      

      Tester Connection	Specified Condition
      R/B ETCS fuse terminal 1 - Battery positive (+) terminal	Below 1 ohms
      R/B ETCS fuse terminal 1 or Battery positive (+) terminal - Body ground	10 k ohms or higher
      R/B ETCS fuse terminal 2 - E6-7 (+BM)	Below 1 ohms
      R/B ETCS fuse terminal 2 or E6-7 (+BM) - Body ground	10 k ohms or higher

      Fig 2: Identifying ETCS Fuse Location

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
   2. OK: REPLACE ECM (See  REPLACEMENT  )