CAN COMMUNICATION SYSTEM(for LHD without Central Gateway ECU) PROBLEM SYMPTOMS TABLE

Tip:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here

Table 1. Result List of How to Proceed with Troubleshooting

Symptom

Suspected Area

Link

Open in CAN Main Bus Line

Open in CAN Main Wire

Click here

Short in CAN Bus Lines

Short in CAN Bus Lines

Click here

Short to +B in CAN Bus Line

Short to B+ in CAN Bus Line

Click here

Short to GND in CAN Bus Line

Short to GND in CAN Bus Line

Click here

Open in One Side of CAN Branch Line

Open in One Side of CAN Branch Line

Click here
Tip:

Refer to How to Proceed with Troubleshooting for the Bus Check procedure. the DTCs output from ECUs connected to the CAN communication system.

The suspected communication stop area can be determined based on the ECU or sensor that was not displayed in CAN Bus Check and by referring to the table below.

Table 2. Communication Stop Mode Table

Symptom

Suspected Area

Link

"Skid Control (ABS/VSC/TRAC)" is not displayed on GTS

Skid Control ECU Communication Stop Mode

Click here

"Air Conditioning Amplifier" is not displayed on GTS

Air Conditioning Amplifier Communication Stop Mode

Click here

"Power Steering (EPS)" is not displayed on GTS

Power Steering ECU Communication Stop Mode

Click here

"Spiral cable (Steering Angle Sensor)" is not displayed on GTS

Steering Angle Sensor Communication Stop Mode

Click here

"ECM (Engine)" is not displayed on the GTS

ECM Communication Stop Mode

Click here

"Main Body" is not displayed on the GTS

Main Body ECU Communication Stop Mode

Click here

"Combination Meter" is not displayed on the GTS

Combination Meter ECU Communication Stop Mode

Click here

"Airbag" is not displayed on the GTS

Center Airbag Sensor Communication Stop Mode

Click here

"Stop and Go/Start" is not displayed on the GTS (w/ Stop and Start System)

Engine Stop and Start ECU Communication Stop Mode

Click here

"Four Wheel Drive Control" is not displayed on the GTS (for 4WD/AWD)

4WD Control ECU Communication Stop Mode

Click here

"Display and Navigation (AVN1)" is not displayed on the GTS (w/ Audio and Visual System [for Radio and Display Type])

Audio Receiver Assembly Communication Stop Mode

Click here
Table 3. DTC Combination Table

Symptom

Suspected Area

Link

Although CAN communication (V bus) is currently normal, ECUs connected to the V bus store CAN communication DTCs

The probable part for which communication is interrupted can be determined using DTC Communication Table and comparing the DTCs output from ECUs connected to the CAN communication system

Click here