CAN BUS DIAGNOSTICS TABLE



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caution During diagnosis, a diagnosis code associated with another system may be set when the ignition switch is turned to the "ON" position with connector(s) disconnected. After completing the repair, confirm all systems for diagnosis code(s). If diagnosis code(s) are set, erase them all.
This diagnosis applies only to the CAN bus lines. If a different system is defective, proceed to the applicable diagnosis section for each system. Observe the diagnosis procedure below only when the CAN bus line is defective.
M.U.T.-III screen
Diagnosis detail
 Reference page
(The ECUs that are not adopted are not displayed.)
 Comment


Failure in red displayed area is estimated.
 Diagnosis Item 1
Communication with no ECUs is possible.
-
 -
 Diagnosis Item 2*
Diagnose shorts in the power supply to CAN bus line <LHD>
-
 -
 Diagnosis Item 2*
Diagnose shorts in the power supply to CAN bus line <RHD>
-
 -
 Diagnosis Item 3*
Diagnose shorts in the earth to CAN bus line <LHD>
-
 -
 Diagnosis Item 3*
Diagnose shorts in the earth to CAN bus line <RHD>
-
 -
 Diagnosis Item 4*
Diagnose shorts between CAN_H and L lines <LHD>
-
 -
 Diagnosis Item 4*
Diagnose shorts between CAN_H and L lines <RHD>


Disconnection in red displayed area is estimated.
 Diagnosis Item 5
Diagnose when the M.U.T.-III cannot receive the data sent by ETACS-ECU.
 Same as before


Disconnection in red displayed area is estimated.
 Diagnosis Item 6
Diagnose when the M.U.T.-III cannot receive the data sent by steering wheel sensor. <Vehicles with ASTC>
 Same as before


Disconnection in red displayed area is estimated.
 Diagnosis Item 7
Diagnose when the M.U.T.-III cannot receive the data sent by A/C-ECU. <Vehicles with automatic A/C>
 Same as before


Disconnection in red displayed area is estimated.
 Diagnosis Item 8
Diagnose when the M.U.T.-III cannot receive the data sent by transfer-ECU. <4WD (6M/T, A/T)>
 Same as before


Disconnection in red displayed area is estimated.
 Diagnosis Item 9
Diagnose when the M.U.T.-III cannot receive the data sent by combination meter.
 Same as before


Disconnection in red displayed area is estimated.
 Diagnosis Item 10
Diagnose when the M.U.T.-III cannot receive the data sent by A/T-ECU. <A/T>
 Same as before
<LHD>

<RHD>

 Disconnection in red displayed area is estimated.
 Diagnosis Item 11
Diagnose the lines between the joint connectors (CAN1 and CAN2)
 Same as before


Disconnection in red displayed area is estimated.
 Diagnosis Item 12
Diagnose when the M.U.T.-III cannot receive the data sent by KOS&OSS-ECU. <Vehicles with KOS&OSS>
 Same as before


Disconnection in red displayed area is estimated.
 Diagnosis Item 13
Diagnose when the M.U.T.-III cannot receive the data sent by SRS-ECU.
 Same as before


Disconnection in red displayed area is estimated.
 Diagnosis Item 14
Diagnose when the M.U.T.-III cannot receive the data sent by ABS-ECU <Vehicles with ABS> or ASTC-ECU <Vehicles with ASTC>.
 Same as before


Disconnection in red displayed area is estimated.
 Diagnosis Item 15
Diagnose when the M.U.T.-III cannot receive the data sent by engine-ECU.
 Same as before


Disconnection in red displayed area is estimated.
 Diagnosis Item 16
Diagnose when the M.U.T.-III cannot receive the data sent by smartphone link display audio <Vehicles with smartphone link display audio>.
note *: diagnosis items 2, 3 and 4 should be checked AFTER the cause of the fault is determined in diagnosis item 1 "Communication with no ECUs is possible".

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