- The specified characteristics shown in Measurement Technology are used to recognize changed CAN voltage levels, which can be caused by
faulty CAN components.
- Possible procedure: Disconnect and then reconnect the CAN bus subscribers at the voltage distributor one at a time.Compare the pass image
with the actual image from the oscilloscope.
Star Diagnosis CANtool
- Aids for representation of actual values and identification of bus wake-up events and bus keepawake events
Continue with button F2
1.1.1.3. No further information available.
1.1.1.4. How do I quickly reach my goal?
How do I quickly reach my goal?First call up menu item 'Evaluation of CAN fault codes' in case of CAN timeout fault codes and communication
errors.The resulting tests must be performed.Menu item 'Further CAN test options' should only be called up if the above-specified tests do not
produce the desired result.Note:Menu item 'General test information' can be called up for an explanation of the different CAN fault types.
1.1.2. Read current CAN configuration and CAN fault codes
Warning!Communication with ECU required.
1.1.3. Further CAN test options
Test 1.1.3.1: Information to engine compartment CAN network
Test 1.1.3.2: Measurements with multimeter on CAN network
Test 1.1.3.3: Test with the aid of the measuring system
Test 1.1.3.4: Display CAN signals with the aid of the special tool 'Star Diagnosis CANtool'.
1.1.3.1. Information to engine compartment CAN network
Test 1.1.3.1.1: Arrangement diagramNOTESome of the control units listed are special equipment and not installed in every vehicle.
Test 1.1.3.1.2: Wiring diagram of CAN bus
1.1.3.1.1. Arrangement diagramNOTESome of the control units listed are special equipment and not installed in every vehicle.
Location diagram (with special equipment)
Figure legend
- A1 (Instrument cluster)
- A89 (DTR controller unit)
- N3/9 (CDI control unit)
- N3/10 (ME-SFI [ME] control unit)
- N15/3 (ETC [EGS] control unit)
- N15/5 (Electronic selector lever module control unit)
- N47-5 (ESP, SPS [PML] and BAS control unit)
- N51 (AIRmatic with ADS control module)
- N63/1 (DTR control module)
- N71 (Headlamp range adjustment control module)
- N73 (EIS [EZS] control unit)
- N80 (Steering column module)
- N93 (Central gateway control unit)
- N97 (Rear axle level control system control module)
- X11/4 (Diagnosis test connector)
- X30/5 (Left voltage distributor (CAN) connector)
- Installation point of plug connection X30/5 (Left voltage distributor (CAN) connector)
- Communication with ECU required
