Diagnosis System

BUS CHECK
1. Select "BUS CHECK" from the "OBD/MOBD MENU" screen.
  
  Fig 1: Displaying BUS CHECK Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the intelligent tester via CAN VIM.
2. Press "ENTER" on the intelligent tester via CAN VIM.
  
  Fig 2: Displaying ENTER Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. The screen displays the ECUs that are properly connected to the CAN communication system.
  HINT:
  
  There is a communication stop in the system of any properly connected ECUs that are not displayed.

DTC TABLE BY ECU

Fig 3: Displaying BUS CHECK Mode

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Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

In the CAN communication system, CAN communication system DTCs can be displayed by the ECU using the intelligent tester
If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Perform troubleshooting according to HOW TO PROCEED WITH TROUBLESHOOTING .

ECM
HINT:

The ECM is connected to the CAN communication system, but CAN communication system DTCs are not output.

Skid control ECU assembly

HINT:

DTC communication uses the SIL line.

DTC CHART

DTC No.	Detection Item
U0073/42	Control Module Communication Bus OFF
U0100/65	Lost Communication with ECM/PCM "A"

GATEWAY ECU
HINT:

The gateway ECU is connected to the CAN communication system but CAN communication DTCs are not output.

DTC COMBINATION TABLE

Fig 4: DTC Combination Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Perform troubleshooting according to the combination of DTCs output.
  HINT: