CAN BUS DIAGNOSTICS TABLE

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.

caution

During diagnosis, a diagnosis code associated with another system may be set when the ignition switch is turned on with connector(s) disconnected. After completing the repair, confirm all systems for diagnosis code(s). If diagnosis code(s) are set, erase them all.

M.U.T.-III screen		Diagnosis detail	Reference page
(The ECUs that are not adopted are not displayed).	Comment	Diagnosis detail	Reference page
	Short circuit to battery in red displayed area is estimated.	Diagnosis Item 1 Diagnose shorts in the power supply to CAN bus line.
	Earthing in red displayed area is estimated.	Diagnosis Item 2 Diagnose shorts in the earth to CAN bus line.
	Short circuit between CAN_H and CAN_L in red displayed area is estimated.	Diagnosis Item 3 Diagnose shorts between CAN_H and L lines.
	Disconnection in red displayed area is estimated.	Diagnosis Item 3 Diagnose shorts between CAN_H and L lines.
	Disconnection in red displayed area is estimated.	Diagnosis Item 4 Diagnose the terminator resistors.
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 5 Diagnose when the M.U.T.-III cannot receive the data sent by combination meter.
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 6 Diagnose when the M.U.T.-III cannot receive the data sent by ETACS-ECU.
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 7 Diagnose when the M.U.T.-III cannot receive the data sent by centre display.
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 8 Diagnose when the M.U.T.-III cannot receive the data sent by steering wheel sensor.
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 9 Diagnose when the M.U.T.-III cannot receive the data sent by immobilizer-ECU.
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 10 Diagnose the lines between the joint connectors (CAN1 and CAN2).
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 11 Diagnose when the M.U.T.-III cannot receive the data sent by SRS-ECU.
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 12 Diagnose when the M.U.T.-III cannot receive the data sent by G and yaw rate sensor.
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 13 Diagnose when the M.U.T.-III cannot receive the data sent by engine-ECU <3000-M/T, 3200 or 3800-M/T> or engine-A/T-ECU <3000-A/T or 3800-A/T>.
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 14 Diagnose when the M.U.T.-III cannot receive the data sent by A/T-ECU. <2800-A/T or 3200-A/T>
	Harness disconnection or loose connection in red displayed area is estimated.	Diagnosis Item 15 Diagnose when the M.U.T.-III cannot receive the data sent by resistor <vehicles without ASTC> or ASTC-ECU <vehicles with ASTC>.