CAN Bus Line

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: CAN Bus Line
- CAN Bus Line

DESCRIPTION

When any DTC for the CAN communication system is output, first measure the resistance between the terminals of the DLC3 to specify the trouble area, and check that there is no short in the CAN main bus line, between the CAN bus lines, to +B, or to GND.

WIRING DIAGRAM













INSPECTION PROCEDURE

PROCEDURE

1. CHECK CAN BUS LINE (MAIN BUS LINE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT)

(a) Turn the engine switch off.

(b) Measure the resistance according to the value(s) in the table below.





Standard resistance:





NG-B -- CHECK CAN BUS LINE (FOR SHORT CIRCUIT)

NG-A -- CHECK CAN MAIN BUS LINE (FOR DISCONNECTION)
OK -- Continue to next step.

2. CHECK CAN BUS LINE (FOR SHORT TO +B)

(a) Measure the resistance according to the value(s) in the table below.





Standard resistance:





NG -- CHECK CAN BUS LINE (FOR SHORT TO +B)
OK -- Continue to next step.

3. CHECK CAN BUS LINE (FOR SHORT TO GND)

(a) Measure the resistance according to the value(s) in the table below.





Standard resistance:





NG -- CHECK CAN BUS LINE (FOR SHORT TO GND)

OK -- HOW TO PROCEED WITH TROUBLESHOOTING