Information Bus
Preparation for Test (DTC readout):
1. Fuses OK.
2. Ignition: ON
3. Connect Hand-Held Tester (HHT).
4. Voltage supply to control modules and CAN data lines OK.
5. All CAN data lines must be connected.
NOTE: The diagnostic trouble codes (DTC's) can only be read out and erased using the Hand-Held Tester (HHT).
DTCs for the system being checked may be located in other control modules, therefore it is important to check the DTC memory on all control modules that are relevant to the system being checked.
While performing the DTC readout, it is possible that DTCs may appear that are not relevant to the system being checked, meaning that all stored DTCs in that particular control module are being displayed.
Non-relevant DTCs are described in each system as necessary.
Note regarding Diagnostic Trouble Codes (DTC's):
Current diagnostic trouble codes are highlighted in black on the display.
Additional detailed fault information based on fault type is displayed with needy all diagnostic codes (DTC's) such as:
> Ohm resistance too great
> Ohm resistance too low
[]+ short circuit to positive (POS)
[]- short circuit to ground (GND)
-//- open circuit
Fault frequency
Faults are noted by frequency of occurrence, i.e.: 4 periodic faults, 4 occurances.
Special Tools:
Conventional tools, test equipment
Description Brand, model, etc.
Multimeter 1) Fluke models 23, 83, 85, 87
1) Available through the MBNA Standard Equipment Program.
