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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE FUSE 

   OK: Go to next step 

2. READ DATA LIST (+BM VOLTAGE) 
   1. Connect the hand-held tester to the 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 14V 

   OK: See  CHECK FOR INTERMITTENT PROBLEMS   ) 

   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 E5 ECM connector.
   3. Measure the resistance of the wire harness side connectors.
   Fig 2: Disconnecting E5 ECM Connector
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard: 

   ECM - ETCS FUSE - BATTERY - RESISTANCE TABLE
   
   

   Tester Connection	Specified Condition
   R/B ETCS fuse terminal 1 - Battery positive (+) terminal	Below 1 Ω
   R/B ETCS fuse terminal 1 or Battery positive (+) terminal - Body ground	10 kΩ or higher
   R/B ETCS fuse terminal 2 - E5-5 (+BM)	Below 1 Ω
   R/B ETCS fuse terminal 2 or E5-5 (+BM) - Body ground	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   OK: REPLACE ECM (See  REPLACEMENT  )