DIAGNOSIS FUNCTION

AS&G OFF INDICATOR/DISPLAY

When the AS&G OFF switch is depressed, the AS&G system should be turned "OFF" and the AS&G OFF indicator/display should be turned "ON". When the following items in the table, related to the AS&G system, are abnormal, the AS&G OFF indicator/display should blink. When the AS&G OFF indicator/display continues to blink, check the output of the diagnosis code. After the ignition switch is turned "ON", the AS&G OFF indicator/display should be turned "ON" for several seconds so that the indicator/display can be checked for the normal operation.

note

When the engine-ECU, CVT-ECU or the ASC-ECU detects a diagnosis code, the AS&G OFF indicator/display is also blinked.

ITEMS TO BLINK AS&G OFF INDICATOR/DISPLAY

Code No.	Diagnosis item
B1353^*1	DC/DC converter (control system) control circuit
B1355^*2	AS&G functional error
B1356	DC/DC converter (control system) diag output line
C1102^*1	Starter interlock circuit
P1612^*1	Starter relay for auto start
U0001^*1	Bus off
U0100^*1	Engine-ECU time-out
U0101^*1	CVT-ECU time-out
U0121^*1	ASC-ECU time-out
U0126^*1	Steering wheel sensor CAN time-out
U0131^*1	EPS-ECU time-out
U0141^*1	ETACS-ECU time-out
U1180^*1	Combination meter time-out
U1210	Brake lamp SW status error
U1211^*1	ENG Parity/Toggle bit error
U1212^*1	CVT Parity/Toggle bit error
U1213^*1	ABS/ASC Parity/Toggle bit error
U1214^*1	ETACS Parity/Toggle bit error

note

When detecting a malfunction, the AS&G-ECU should store it. When detecting the same malfunction again after the next engine start, the AS&G-ECU should blink the AS&G indicator/display because the AS&G-ECU judges the malfunction surely occurs. For the items marked with a "*1" in the diagnosis code number column, the AS&G OFF indicator/display blinks on the first detection of the malfunction. In addition, for the items marked with a "*2" in the diagnosis code number column, the AS&G OFF indicator/display blinks on the second detection of the malfunction.

AS&G INDICATOR/DISPLAY

When the specified conditions are satisfied during the engine operation, the AS&G-ECU should send engine stop request signal to the engine-ECU and the engine-ECU should stop the engine. At that time, the AS&G indicator/display should be turned "ON". If the following items in the table, related to the AS&G system, are applied, the AS&G indicator/display should blink. When the AS&G indicator/display continues to blink, carry out the check according to the applied item. After the ignition switch is turned "ON", the AS&G OFF indicator/display should be turned "ON" for several seconds so that the indicator/display can be checked for the normal operation.

ITEMS TO BLINK AS&G INDICATOR/DISPLAY

Items	Inspection contents
The driver’s door is opened	Check the driver’s door is securely closed. Use the key to start the engine because the auto start should be prohibited if the driver’s door is opened during the auto stop.
The hood is opened	Check the hood is securely closed. Use the key to start the engine because the auto start should be prohibited if the hood is opened during the auto stop.
The driver’s seat belt is unfastened.	Check the driver’s seat belt is securely fastened. Use the key to start the engine because the auto start should be prohibited if the driver’s seat belt is unfastened during the auto stop.
During auto stop, selector lever is placed on "P" position and brake pedal is released	Check the selector lever is in the "P" position. In addition, auto start enable when the brake pedal depressed again or do the selector lever any place other than "P".

METHOD OF READING AND ERASING DIAGNOSIS CODES

Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - Diagnosis Function.

INSPECTION WITH M.U.T.-III DATA LIST

Reading data list using M.U.T.-III enables you to check the vehicle body harnesses and components for abnormalities. Sensor input or output to the actuator can be displayed in numerical values or graphs in the data list.

DIAGNOSIS PROCEDURE

After the ignition switch is in "LOCK" (OFF) position, connect the M.U.T.-III to the diagnosis connector.
Turn the ignition switch to the "ON" position.
Select "AS&G" from System select Screen of the M.U.T.-III.
Select "Data List" from AS&G Screen.
Use the data list function to perform the check (Refer to ).
If any abnormality is found, inspect and repair vehicle body harnesses and components.
After repair, check that input and output have returned to normal.
If a diagnosis code which is caused by inspection and repair work is generated, erase the diagnosis code.
Perform a test run to check that the malfunction phenomenon is resolved.

FREEZE FRAME DATA

When the AS&G-ECU detects a malfunction and stores a diagnosis code, it also stores a current status of the engine. This function is called "Freeze frame data". By analyzing this "Freeze frame data" with the M.U.T.-III, an effective troubleshooting can be performed.
The display items of freeze frame data are shown below.

DISPLAY ITEM LIST

Item No.	Date Item	Unit
1	Odometer	km
2	Ignition cycle	-
4	Accumulated minute^*	min

note

^*: Accumulated time of current malfunction from time point when malfunction is detected.

FAIL-SAFE AND BACKUP FUNCTION

The control is carried out, which keeps the safety driving by the preset control logic when the diagnosis code is set. The diagnosis code having the fail-safe function is as follows.

List of fail-safe and backup function items

Code No.	Diagnosis item	Control content during malfunction
B1351	DC/DC converter (control system) performance	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
B1352	DC/DC converter (control system) system	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
B1353	DC/DC converter (control system) control circuit	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
B1355	AS&G functional error	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
B1356	DC/DC converter (control system) diag output line	In the normal operation, the auto stop is prohibited.
C1102	Starter interlock circuit	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
P1612	Starter relay for auto start	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U0001	Bus off	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U0100	Engine-ECU time-out	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U0101	CVT-ECU time-out	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U0121	ASC-ECU time-out	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U0126	Steering wheel sensor CAN time-out	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U0131	EPS-ECU time-out	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U0141	ETACS-ECU time-out	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U1180	Combination meter time-out	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U1210	Brake lamp switch status error	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U1211	Engine Parity/Toggle bit error	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U1212	CVT Parity/Toggle bit error	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U1213	ABS/ASC Parity/Toggle bit error	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.
U1214	ETACS Parity/Toggle bit error	In the normal operation, the auto stop is prohibited. If the malfunction is detected during the auto stop, carry out the forcible auto start.