Inspection Procedure

HINT:

Read freeze frame data using the intelligent 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.

INSPECT FUSE (ETCS)
1. Remove the ETCS fuse from the engine room No. 2 relay block.
2. Measure the resistance of the fuse.
  Standard resistance:
  
  Below 1 Ω
Fig 1: Identifying ETCS Fuse
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to next step
READ DATA LIST (+BM VOLTAGE)
1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
2. Turn the engine switch on (IG).
3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / +BM.
  Standard voltage:
  
  9 to 14 V
Fig 2: Identifying E8 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: CHECK FOR INTERMITTENT PROBLEM

NG: Go to next step

CHECK WIRE HARNESS (ECM - ETCS FUSE, ETCS FUSE - BATTERY)

Remove the ETCS fuse from the engine room No. 2 relay block.
Disconnect the E8 ECM connector.
Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
Relay block ETCS fuse terminal 1 - Battery positive (+) terminal	Below 1 Ω
Relay block ETCS fuse terminal 2 - E8-5 (+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 E8-5 (+BM) - Body ground	10 kΩ or higher

Fig 3: Disconnecting E8 ECM Connector

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE ECM