Toyota Tundra Service Manual: Problem Symptoms Table

Toyota Tundra Service Manual / Power Source, Network / Can Communication / Can Communication System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

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.
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Result List of How to Proceed with Troubleshooting

Symptom	Suspected Area	Link
The result of "How to Proceed with Troubleshooting" is "Open in Bus 1 Main Bus Line".	Open in Bus 1 Main Bus Line
The result of "How to Proceed with Troubleshooting" is "Short in Bus 1 Lines".	Short in Bus 1 Lines
The result of "How to Proceed with Troubleshooting" is "Short to +B in Bus 1 Line".	Short to +B in Bus 1 Line
The result of "How to Proceed with Troubleshooting" is "Short to GND in Bus 1 Line".	Short to GND in Bus 1 Line
The result of "How to Proceed with Troubleshooting" is "Open in One Side of Bus 1 Branch Line".	Open in One Side of Bus 1 Branch Line
The result of "How to Proceed with Troubleshooting" is "Open in Bus 2 Main Bus Line".	Open in Bus 2 Main Bus Line
The result of "How to Proceed with Troubleshooting" is "Short in Bus 2 Lines".	Short in Bus 2 Lines
The result of "How to Proceed with Troubleshooting" is "Short to +B in Bus 2 Line".	Short to +B in Bus 2 Line
The result of "How to Proceed with Troubleshooting" is "Short to GND in Bus 2 Line".	Short to GND in Bus 2 Line
The result of "How to Proceed with Troubleshooting" is "Open in Bus 3 Main Bus Line".	Open in Bus 3 Main Bus Line
The result of "How to Proceed with Troubleshooting" is "Short in Bus 3 Lines".	Short in Bus 3 Lines
The result of "How to Proceed with Troubleshooting" is "Short to +B in Bus 3 Line".	Short to +B in Bus 3 Line
The result of "How to Proceed with Troubleshooting" is "Short to GND in Bus 3 Line".	Short to GND in Bus 3 Line
The result of "How to Proceed with Troubleshooting" is "Open in One Side of Bus 3 Branch Line".	Open in One Side of Bus 3 Branch Line
The result of "How to Proceed with Troubleshooting" is "Open in Bus 4 Main Bus Line".	Open in Bus 4 Main Bus Line
The result of "How to Proceed with Troubleshooting" is "Short in Bus 4 Lines".	Short in Bus 4 Lines
The result of "How to Proceed with Troubleshooting" is "Short to +B in Bus 4 Line".	Short to +B in Bus 4 Line
The result of "How to Proceed with Troubleshooting" is "Short to GND in Bus 4 Line".	Short to GND in Bus 4 Line
The result of "How to Proceed with Troubleshooting" is "Open in One Side of Bus 4 Branch Line".	Open in One Side of Bus 4 Branch Line
The result of "How to Proceed with Troubleshooting" is "Open in Bus 5 Main Bus Line".	Open in Bus 5 Main Bus Line
The result of "How to Proceed with Troubleshooting" is "Short in Bus 5 Lines".	Short in Bus 5 Lines
The result of "How to Proceed with Troubleshooting" is "Short to +B in Bus 5 Line".	Short to +B in Bus 5 Line
The result of "How to Proceed with Troubleshooting" is "Short to GND in Bus 5 Line".	Short to GND in Bus 5 Line
The result of "How to Proceed with Troubleshooting" is "Open in One Side of Bus 5 Branch Line".	Open in One Side of Bus 5 Branch Line

HINT:

Refer to How to Proceed with Troubleshooting for the Bus Check procedure.
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 following table.

Communication Stop Mode Table

Symptom	Suspected Area	Link
Communication stop for "Skid Control (ABS/VSC/TRAC)" is indicated on the "Communication Bus Check" screen of the Techstream.	Skid Control ECU Communication Stop Mode
Communication stop for "Trailer Brake Controller" is indicated on the "Communication Bus Check" screen of the Techstream.	Trailer Brake Controller Communication Stop Mode
Communication stop for "Air Conditioning Amplifier" is indicated on the "Communication Bus Check" screen of the Techstream.	Air Conditioning Amplifier Communication Stop Mode
Communication stop for "Spiral cable (Steering Angle Sensor)" is indicated on the "Communication Bus Check" screen of the Techstream.	Steering Angle Sensor Communication Stop Mode
Communication stop for "ECM (Engine)" is indicated on the "Communication Bus Check" screen of the Techstream.	ECM Communication Stop Mode
Communication stop for "Main Body" is indicated on the "Communication Bus Check" screen of the Techstream.	Main Body ECU Communication Stop Mode
Communication stop for "Combination Meter" is indicated on the "Communication Bus Check" screen of the Techstream.	Combination Meter ECU Communication Stop Mode
Communication stop for "Airbag" is indicated on the "Communication Bus Check" screen of the Techstream.	Center Airbag Sensor Communication Stop Mode
Communication stop for "Four Wheel Drive Control" is indicated on the "Communication Bus Check" screen of the Techstream.	4WD Control ECU Communication Stop Mode
Communication stop for "Display and Navigation (AVN1)" is indicated on the "Communication Bus Check" screen of the Techstream.	Navigation ECU Communication Stop Mode (w/ Navigation System)
	Audio Receiver Assembly Communication Stop Mode (w/ Audio and Visual System)
Communication stop for "Blind Spot Monitor Master" is indicated on the "Communication Bus Check" screen of the Techstream.	Blind Spot Monitor Sensor Communication Stop Mode
Communication stop for "Front Radar" is indicated on the "Communication Bus Check" screen of the Techstream.	Millimeter Wave Radar Sensor Communication Stop Mode
Communication stop for "Front Camera Module" is indicated on the "Communication Bus Check" screen of the Techstream.	Front Camera Module Communication Stop Mode
Communication stop for "Tire Pressure2" is indicated on the "Communication Bus Check" screen of the Techstream.	Tire Pressure Monitor ECU Communication Stop Mode

DTC Combination Table

Symptom	Suspected Area	Link
Although CAN communication is currently normal, ECUs connected to bus store CAN communication DTCs.	The probable part for which communication is interrupted can be determined using DTC Combination Table and comparing the DTCs output from ECUs connected to the CAN communication system.

Precaution

Skid Control ECU Communication Stop Mode

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DESCRIPTION DTC B1788 is set when the occupant classification ECU receives a collision detection signal, which is sent by the occupant detection sensor rear RH when an accident occurs. DTC B1788 is also set when the front seat frame with adjuster RH is subjected to a strong impact, even if an actual ...

Toyota Tundra Service Manual: Problem Symptoms Table

Precaution

Skid Control ECU Communication Stop Mode

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