Operator`s manual

178 OBD
49.0 EMS (ELECTRONIC MODULATED
SUSPENSION)
Toyota vehicles support two different types of diagnosis of the EMS system:
• OBD DTC Info only
• Multiplex-OBD (M-OBD)
The diagnostic functions available vary between the different ECU types. The connector
used for diagnosis can provide a clue as to the type of ECU the vehicle has.
• OBD ECUs are diagnosed using either the CHECK or TDCL.
• M-OBD ECUs are diagnosed using the DLC3.
The diagnostic functions available are different for each of the systems. The diagnostic
test modes are described separately. See Section 49.1: OBD EMS CODES and Section
49.2: M-OBD EMS.