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.

LH DRIVE VEHICLES

M.U.T.-III SCREEN	DIAGNOSIS DETAILS	REFERENCE PAGE
<Comment> Short circuit to battery in red displayed area is estimated.	Diagnostic Item 1 Diagnose the CAN bus lines for short to power supply <LH drive vehicles>
<Comment> Earthing in red displayed area is estimated.	Diagnostic Item 4 Diagnose the CAN bus lines for short to earth <LH drive vehicles>
<Comment> Short circuit between CAN_H and CAN_L in red displayed area is estimated.	Diagnostic Item 7 Diagnose the lines between CAN_L and CAN_H for short circuit <LH drive vehicles>
<Comment> Disconnection in red displayed area is estimated.	Diagnostic Item 10 Diagnose the terminator resistors at both ends <LH drive vehicles>
<Comment> Malfunction of terminating resistance is estimated.	Diagnostic Item 12 Diagnose the terminator resistor at one end <LH drive vehicles>
<Comment> Disconnection, loose connection or terminating resistance in red displayed area is estimated.
<Comment> Disconnection, loose connection or terminating resistance in red displayed area is estimated.
<Comment> Malfunction in red displayed area is estimated. Please refer to service manual and inspect with ’CAN Detail Diagnosis’.	Diagnostic Item 14 Diagnose CAN bus lines thoroughly <LH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 17 Diagnose the lines between the joint connectors (CAN1 and CAN2) <LH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 19 Diagnose the lines from the main bus line to the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 20 Diagnose the lines between CAN main bus line and the ABS-ECU
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 21 Diagnose the lines from the main bus line to the combination meter <LH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 23 Diagnose the lines from the main bus line to the ETACS-ECU <LH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 25 Diagnose the lines from the main bus line to the A/C-ECU <LH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 27 Diagnose the lines from the main bus line to the SRS-ECU <LH drive vehicles>
If the screen other than above is shown	Troubles are present at two or more spots. Diagnose CAN bus lines by referring to the trouble spot pinpoint procedures. If the trouble still can not be resolved, refer to diagnostic item 14, Diagnose CAN bus lines thoroughly.	-

note

If the diagnostic items other than No.14 cannot resolve the trouble, follow diagnostic item 14, Diagnose CAN bus lines thoroughly.

RH DRIVE VEHICLES EXCEPT FOR HONG KONG AND SINGAPORE

M.U.T.-III SCREEN	DIAGNOSIS DETAILS	REFERENCE PAGE
<Comment> Short circuit to battery in red displayed area is estimated.	Diagnostic Item 2 Diagnose the CAN bus lines for short to power supply <RH drive vehicles except for Hong Kong and Singapore>
<Comment> Earthing in red displayed area is estimated.	Diagnostic Item 5 Diagnose the CAN bus lines for short to earth <RH drive vehicles except for Hong Kong>>
<Comment> Short circuit between CAN_H and CAN_L in red displayed area is estimated.	Diagnostic Item 8 Diagnose the lines between CAN_L and CAN_H for short circuit <RH drive vehicles except for Hong Kong and Singapore>>
<Comment> Disconnection in red displayed area is estimated.	Diagnostic Item 11 Diagnose the terminator resistors at both ends <RH drive vehicles>
<Comment> Malfunction of terminating resistance is estimated.	Diagnostic Item 13 Diagnose the terminator resistor at one end <RH drive vehicles>
<Comment> Disconnection, loose connection or terminating resistance in red displayed area is estimated.
<Comment> Disconnection, loose connection or terminating resistance in red displayed area is estimated.
<Comment> Malfunction in red displayed area is estimated. Please refer to service manual and inspect with ’CAN Detail Diagnosis’.	Diagnostic Item 15 Diagnose CAN bus lines thoroughly <RH drive vehicles except for Hong Kong and Singapore>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 18 Diagnose the lines between the joint connectors (CAN1 and CAN2) <RH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 19 Diagnose the lines from the main bus line to the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 20 Diagnose the lines between CAN main bus line and the ABS-ECU
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 22 Diagnose the lines from the main bus line to the combination meter <RH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 24 Diagnose the lines from the main bus line to the ETACS-ECU <RH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 26 Diagnose the lines from the main bus line to the A/C-ECU <RH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 28 Diagnose the lines from the main bus line to the SRS-ECU <RH drive vehicles except for Hong Kong and Singapore>
If the screen other than above is shown	Troubles are present at two or more spots. Diagnose CAN bus lines by referring to the trouble spot pinpoint procedures. If the trouble still can not be resolved, refer to diagnostic item 15, Diagnose CAN bus lines thoroughly.	-

note

If the diagnostic items other than No.15 cannot resolve the trouble, follow diagnostic item 15, Diagnose CAN bus lines thoroughly.

VEHICLES FOR HONG KONG AND SINGAPORE

M.U.T.-III SCREEN	DIAGNOSIS DETAILS	REFERENCE PAGE
<Comment> Short circuit to battery in red displayed area is estimated.	Diagnostic Item 3 Diagnose the CAN bus lines for short to power supply <Vehicles for Hong Kong and Singapore>
<Comment> Earthing in red displayed area is estimated.	Diagnostic Item 6 Diagnose the CAN bus lines for short to earth <Vehicles for Hong Kong and Singapore>
<Comment> Short circuit between CAN_H and CAN_L in red displayed area is estimated.	Diagnostic Item 9 Diagnose the lines between CAN_L and CAN_H for short circuit <Vehicles for Hong Kong and Singapore>
<Comment> Disconnection in red displayed area is estimated.	Diagnostic Item 11 Diagnose the terminator resistors at both ends <RH drive vehicles>
<Comment> Malfunction of terminating resistance is estimated.	Diagnostic Item 13 Diagnose the terminator resistor at one end <RH drive vehicles>
<Comment> Disconnection, loose connection or terminating resistance in red displayed area is estimated.
<Comment> Disconnection, loose connection or terminating resistance in red displayed area is estimated.
<Comment> Malfunction in red displayed area is estimated. Please refer to service manual and inspect with ’CAN Detail Diagnosis’.	Diagnostic Item 16 Diagnose CAN bus lines thoroughly <Vehicles for Hong Kong and Singapore>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 18 Diagnose the lines between the joint connectors (CAN1 and CAN2) <RH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 19 Diagnose the lines from the main bus line to the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 20 Diagnose the lines between CAN main bus line and the ABS-ECU
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 22 Diagnose the lines from the main bus line to the combination meter <RH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 24 Diagnose the lines from the main bus line to the ETACS-ECU <RH drive vehicles>
<Comment> Harness disconnection or loose connection in red displayed area is estimated.	Diagnostic Item 26 Diagnose the lines from the main bus line to the A/C-ECU <RH drive vehicles>
If the screen other than above is shown	Troubles are present at two or more spots. Diagnose CAN bus lines by referring to the trouble spot pinpoint procedures. If the trouble still can not be resolved, refer to diagnostic item 16, Diagnose CAN bus lines thoroughly.	-

note

If the diagnostic items other than No.16 cannot resolve the trouble, follow diagnostic item 16, Diagnose CAN bus lines thoroughly.