Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Power Source / Network / Networking / 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.

Result List of Check CAN Bus Line

Symptom	Suspected Area	See page
Result of "How to proceed with Troubleshooting" is "Open in CAN Main Wire"	Open in CAN Main Wire
Result of "How to Proceed with Troubleshooting" is "Short in CAN Bus Lines"	Short in CAN Bus Lines
Result of "How to Proceed with Troubleshooting" is "Short to B+ in CAN Bus Line"	Short to B+ in CAN Bus Line
Result of "How to Proceed with Troubleshooting" is "Short to GND in CAN Bus Line"	Short to GND in CAN Bus Line
Result of "How to Proceed with Troubleshooting" is "Open in One Side of CAN Branch Line"	Open in One Side of CAN Branch Line

Communication Stop Mode Table

Symptom	Suspected Area	See page
"Skid Control (ABS/VSC/TRAC)" is not displayed on the Techstream*1	Brake Actuator (Skid Control ECU) Communication Stop Mode
"Skid Control (ABS/VSC/TRAC)" is not displayed on the Techstream*2	Skid Control ECU Communication Stop Mode
"Air Conditioning Amplifier" is not displayed on the Techstream*3	Air Conditioning Amplifier Communication Stop Mode
"PPS" is not displayed on the Techstream	Power Steering ECU Communication Stop Mode
"Spiral cable (Steering Angle Sensor)" is not displayed on the Techstream	Steering Angle Sensor Communication Stop Mode
"Yaw Rate Sensor" is not displayed on the Techstream	Yaw Rate Sensor Communication Stop Mode
"ECM (Engine)" is not displayed on the Techstream	ECM Communication Stop Mode
"Main Body" is not displayed on the Techstream	Main Body ECU Communication Stop Mode
"Power Management1" is not displayed on the Techstream*4	Power Management Control ECU Communication Stop Mode
"Combination Meter" is not displayed on the Techstream	Combination Meter ECU Communication Stop Mode
"Certification (Smart)" is not displayed on the Techstream*4	Certification ECU Communication Stop Mode
"Airbag" is not displayed on the Techstream	Center Airbag Sensor Communication Stop Mode
"KDSS" is not displayed on the Techstream*5	Suspension Control ECU Communication Stop Mode
"Four Wheel Drive Control" is not displayed on the Techstream*2	4WD Control ECU Communication Stop Mode
"Display and Navigation (AVN1)" is not displayed on the Techstream*6	Navigation Receiver Assembly Communication Stop Mode
"Display and Navigation (AVN1)" is not displayed on the Techstream*7	Audio Receiver Assembly Communication Stop Mode

*1: for 2WD
*2: for 4WD
*3: w/o Smart Key System
*4: w/ Smart Key System
*5: w/ Kinetic Dynamic Suspension System
*6: for Navigation Receiver Type
*7: for Radio and Display Receiver Type

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT IMPORTANT POINTS CONCERNING TROUBLESHOOTING CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS syste ...

Terminals Of Ecu

TERMINALS OF ECU HINT: Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation. 1. DISCONNECT CABLE ...

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