Troubleshooting CAN Bus Failure Issue on 24/01/22
The diagnosis reveals issues with the CAN bus on a PCB, including mismatches and time-out problems between channels. It questions the duration of dominant states and suggests following ISO1050 for resolution after A-B-A swap testing.
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CAN Failure Issue 24/01/22
Diagnosis-Normal PCBA Yellow Channel : CAN_TX Blue Channel CAN BUS Yellow Channel : CAN_RX Blue Channel CAN BUS CAN BUS & CAN_RX match CAN_TX & CAN BUS match GT Internal Only GT Internal Only 2
Diagnosis-Failure PCBA Yellow Channel : CAN_TX Blue Channel CAN BUS Yellow Channel : CAN_RX Blue Channel CAN BUS CAN RX & CAN BUS match Yellow Channel : CAN_TX Blue Channel CAN_RX 1.56ms mismatch between CAN_TX & CAN_RX 1.56ms mismatch between CAN_TX & CAN BUS GT Internal Only GT Internal Only 3
Diagnosis-Failure PCBA Yellow Channel : CAN_TX Blue Channel CAN BUS CAN_TX keep 2ms CAN BUS dominant hold 440us 1.56ms mismatch between CAN_TX & CAN BUS GT Internal Only GT Internal Only 4
Diagnosis-Failure PCBA Yellow Channel : CAN_TX Blue Channel CAN BUS It seems 1050 goes into Dominant Time- Out mode but my question here why Dominant can only last 440us Our BAUD rate is 10Kbps so only 5bit dominant will kick-off DTO mode CAN_TX keep 2ms CAN BUS dominant hold 440us GT Internal Only GT Internal Only 5
Diagnosis Failure follow ISO1050 after A-B-A swap test Maybe Dominant Time-Out issue which lead to the PCBA include software select particular 1050 GT Internal Only GT Internal Only 6
