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)

Fig 1: Inspecting ETCS Fuse From Engine Room No. 1 Relay Block
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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

OK: Go to next step
READ VALUE OF INTELLIGENT TESTER (+BM VOLTAGE)
1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
  
  Fig 2: Identifying E2 ECM Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch ON.
3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / +BM.
  Standard voltage:
  
  9 to 14 V
OK: CHECK FOR INTERMITTENT PROBLEM

NG: Go to next step

CHECK WIRE HARNESS (ETCS FUSE - ECM AND BATTERY)

Remove the ETCS fuse from the engine room No. 1 relay block, junction block.
Disconnect the E2 ECM connector.

Fig 3: Disconnecting E2 ECM Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 E2-5 (+BM) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE ECM