Monday, June 29, 2020

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 1143

Mercedes Benz Truck GLK 350 (204.956) V6-3.5L (272.991) Manufacturer Code Page 1143

- An event that wakes up the bus without reason is designated a bus wake-up event.

- The cause of this is not the CAN networking, but the transmitter control unit or its sensors.

- Further possible causes of fault:

- Magnetic fields caused by nearby high-voltage installations, railroad installations or power plants.

- Magnetic fields can radiate on to lines and control units in rare cases and cause undefined behavior in the control units.

- The special tool 'Star Diagnosis CANtool' can be used to log bus wake-up events, bus keepawake events and other signals.

Bus keepawake event

- When a control unit keeps communication on the bus awake without reason, this is designated a bus keepawake event.

- The cause of this is not the CAN networking, but the transmitter control unit or its sensors.

- Further possible causes of fault:

- Magnetic fields caused by nearby high-voltage installations, railroad installations or power plants.

- Magnetic fields can radiate on to lines and control units in rare cases and cause undefined behavior in the control units.

- The special tool 'Star Diagnosis CANtool' can be used to log bus wake-up events, bus keepawake events and other signals.

1.1.1.2. No further information available.

1.1.1.3. General CAN fundamentals

Test 1.1.1.3.1: Low-Speed CAN (83,3 kBit/s)

Test 1.1.1.3.2: High-Speed CAN (125 kBit/s , 500 kBit/s)

1.1.1.3.1. Low-Speed CAN (83,3 kBit/s)

General CAN fundamentals

Low-Speed CAN (83,3 kBit/s)

- 83,3 kBit/s : For example:Interior CAN busSeries 211

- This CAN bus enables single-wire mode.

- 'Single-wire mode' means that fault-free communication between the control units is still possible even if one of the two CAN lines fails.

- This CAN bus does not require external terminating resistors.

Legend and description for figure 1CAN-H: CAN bus HighCAN-L: CAN bus LowECU 1 ... n: Control unit 1 ... nLegend and description for figure

2U 1: Specification approx. 3,6 voltsU 2: Specification approx. 0 voltsU 3: Specification approx. 2,5 voltsU 4: Specification approx. 1,4 voltsU 5:

Specification approx. 5 voltsContinue with button F2