SEKURE SX-3100LCD Operator's Manual Page 145

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OBD 133
13.0 AIR CONDITIONING
Toyota vehicles use two different types of Air Conditioning ECUs:
OBD DTC Info
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 test modes for each ECU type are described separately. See Section 13.1:
OBD Air Conditioning DTC Info, and Section 13.2: M-OBD Air Conditioning.
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