Inspection Procedure

HINT:

Read freeze frame data using the Techstream. 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 relay block.
   2. Measure the resistance of the fuse.

   Standard resistance: 

   Below 1 Ω. 

   NG: CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

   Fig 1: Identifying ETCS Fuse

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

2. READ VALUE OF TECHSTREAM (+BM VOLTAGE) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch ON.
   3. Enter the following menus: Powertrain / Engine and ECT / Data List / ETCS Actuator Power.

   Standard voltage: 

   9 to 14 V 

   OK: CHECK FOR INTERMITTENT PROBLEM 

   Fig 2: Identifying ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: Go to next step 

3. CHECK WIRE HARNESS (ETCS FUSE - ECM AND BATTERY) 
   1. Remove the ETCS fuse from the engine room No. 1 relay block, junction block.
   2. Disconnect the E2 ECM connector.
   3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   Relay block ETCS fuse terminal 1 - Battery positive (+) terminal	Below 1 Ω
   Relay block ETCS fuse terminal 2 - E2-5 (+BM)	Below 1 Ω
   Relay block ETCS fuse terminal 1 or Battery positive (+) terminal - Body ground	10 kΩ or higher
   Relay block ETCS fuse terminal 2 or E2-S (+BM) - Body ground	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   Fig 3: Checking Wire Harness (ETCS Fuse - ECM And Battery)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE ECM