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.

<VEHICLES WITHOUT A/C AND TCL/ASC SYSTEM>

M.U.T.-III SCREEN	DIAGNOSIS DETAILS	REFERENCE PAGE
<Comment> Short circuit to battery in red displayed area is estimated.	Diagnosis Item 1 Diagnose the CAN bus lines for short to power supply <Vehicles without A/C and TCL/ASC system>
<Comment> Grounding in red displayed area is estimated.	Diagnosis Item 5 Diagnose the CAN bus lines for short to earth <Vehicles without A/C and TCL/ASC system>
<Comment> Short circuit between CAN_H and CAN_L in red displayed area is estimated.	Diagnosis Item 9 Diagnose the lines between CAN_L and CAN_H for short circuit <Vehicles without A/C and TCL/ASC system>
<Comment> Mulfunction of terminating resistance is estimated.	Diagnosis Item 13 The terminators resistors at both ends or terminator resistor at one side may be defective
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 14 Diagnose the lines between the joint connectors (CAN1 and CAN2)
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 15 Diagnose the lines from the main bus line to the engine-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission>.
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 16 Diagnose the lines from the main bus line to the ABS-ECU <Vehicles without TCL/ASC system>
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 19 Diagnose the lines from the main bus line to the electric power steering-ECU
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 20 Diagnose the lines from the main bus line to the combination meter
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 21 Diagnose the lines from the main bus line to the ETACS-ECU
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 23 Diagnose the lines from the main bus line to the SRS-ECU

<VEHICLES WITH A/C AND WITHOUT TCL/ASC SYSTEM>

M.U.T.-III SCREEN	DIAGNOSIS DETAILS	REFERENCE PAGE
<Comment> Short circuit to battery in red displayed area is estimated.	Diagnosis Item 2 Diagnose the CAN bus lines for short to power supply <Vehicles with A/C and without TCL/ASC system>
<Comment> Grounding in red displayed area is estimated.	Diagnosis Item 6 Diagnose the CAN bus lines for short to earth <Vehicles with A/C and without TCL/ASC system>
<Comment> Short circuit between CAN_H and CAN_L in red displayed area is estimated.	Diagnosis Item 10 Diagnose the lines between CAN_L and CAN_H for short circuit <Vehicles with A/C and without TCL/ASC system>
<Comment> Mulfunction of terminating resistance is estimated.	Diagnosis Item 13 The terminators resistors at both ends or terminator resistor at one side may be defective
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 14 Diagnose the lines between the joint connectors (CAN1 and CAN2)
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 15 Diagnose the lines from the main bus line to the engine-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission>.
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 16 Diagnose the lines from the main bus line to the ABS-ECU <Vehicles without TCL/ASC system>
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 19 Diagnose the lines from the main bus line to the electric power steering-ECU
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 20 Diagnose the lines from the main bus line to the combination meter
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 21 Diagnose the lines from the main bus line to the ETACS-ECU
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 22 Diagnose the lines from the main bus line to the A/C-ECU <Vehicles with A/C>
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 23 Diagnose the lines from the main bus line to the SRS-ECU

<VEHICLES WITHOUT A/C AND WITH TCL/ASC SYSTEM>

M.U.T.-III SCREEN	DIAGNOSIS DETAILS	REFERENCE PAGE
<Comment> Short circuit to battery in red displayed area is estimated.	Diagnosis Item 3 Diagnose the CAN bus lines for short to power supply <Vehicles without A/C and with TCL/ASC system>
<Comment> Grounding in red displayed area is estimated.	Diagnosis Item 7 Diagnose the CAN bus lines for short to earth <Vehicles without A/C and with TCL/ASC system>
<Comment> Short circuit between CAN_H and CAN_L in red displayed area is estimated.	Diagnosis Item 11 Diagnose the lines between CAN_L and CAN_H for short circuit <Vehicles without A/C and with TCL/ASC system>
<Comment> Mulfunction of terminating resistance is estimated.	Diagnosis Item 13 The terminators resistors at both ends or terminator resistor at one side may be defective
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 14 Diagnose the lines between the joint connectors (CAN1 and CAN2)
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 15 Diagnose the lines from the main bus line to the engine-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission>.
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 17 Diagnose the lines from the main bus line to the ABS/TCL/ASC-ECU <Vehicles with TCL/ASC system>
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 18 Diagnose the lines from the main bus line to the G and yaw rate sensor <Vehicles with TCL/ASC system>
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 19 Diagnose the lines from the main bus line to the electric power steering-ECU <Vehicles with TCL/ASC system>
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 20 Diagnose the lines from the main bus line to the combination meter
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 21 Diagnose the lines from the main bus line to the ETACS-ECU
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 23 Diagnose the lines from the main bus line to the SRS-ECU
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 24 Diagnose the lines from the main bus line to the steering wheel sensor <Vehicles with TCL/ASC system>

<VEHICLES WITH A/C AND TCL/ASC SYSTEM>

M.U.T.-III SCREEN	DIAGNOSIS DETAILS	REFERENCE PAGE
<Comment> Short circuit to battery in red displayed area is estimated.	Diagnosis Item 4 Diagnose the CAN bus lines for short to power supply <Vehicles with A/C and TCL/ASC system>
<Comment> Grounding in red displayed area is estimated.	Diagnosis Item 8 Diagnose the CAN bus lines for short to earth <Vehicles with A/C and TCL/ASC system>
<Comment> Short circuit between CAN_H and CAN_L in red displayed area is estimated.	Diagnosis Item 12 Diagnose the lines between CAN_L and CAN_H for short circuit <Vehicles with A/C and TCL/ASC system>
<Comment> Malfunction of terminating resistance is estimated.	Diagnosis Item 13 The terminators resistors at both ends or terminator resistor at one side may be defective
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 14 Diagnose the lines between the joint connectors (CAN1 and CAN2)
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 15 Diagnose the lines from the main bus line to the engine-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission>.
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 17 Diagnose the lines from the main bus line to the ABS/TCL/ASC-ECU <Vehicles with TCL/ASC system>
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 18 Diagnose the lines from the main bus line to the G and yaw rate sensor <Vehicles with TCL/ASC system>
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 19 Diagnose the lines from the main bus line to the electric power steering-ECU
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 20 Diagnose the lines from the main bus line to the combination meter
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 21 Diagnose the lines from the main bus line to the ETACS-ECU
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 22 Diagnose the lines from the main bus line to the A/C-ECU <Vehicles with A/C>
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 23 Diagnose the lines from the main bus line to the SRS-ECU
<Comment> Disconnection in red displayed area is estimated.	Diagnosis Item 24 Diagnose the lines from the main bus line to the steering wheel sensor <Vehicles with TCL/ASC system>