DIAGNOSTIC FUNCTION

ABS-ECU has the following functions for easier system checks. The following items can be diagnosed using M.U.T-III.

Diagnosis code set (Refer to ).
Service data output (Refer to ).
Actuator test (Refer to ).
Freeze frame data output (Refer to ).

CHECK OF FREEZE FRAME DATA

The freeze frame data can be checked by using the M.U.T.-III.

When detecting fault and storing the diagnosis code, the ECU connected to CAN bus line obtains the data before the determination of the diagnosis code and the data when the diagnosis code is determined, and then stores the ECU status of that time. By analysing each data from M.U.T.-III, the troubleshooting can be performed more efficiently. The displayed items are as the table below.

Display item list

Item No.	Item name	Data item	Unit
1	Odometer	Total driving distance after the diagnosis code is generated	km
2	Ignition cycle	Number of times the ignition switch is turned "ON" or "LOCK (OFF)" after the past failure transition	Number of counts is displayed.
5	Power supply voltage	Voltage of power supply when the diagnosis code is generated	V
9	G sensor	G sensor value when a diagnosis code is set	G
13	Stop lamp switch	Stop light switch condition when the diagnosis code is generated :OFF/ON	-
21	Pump motor	Pump motor status (ON/OFF) when a diagnosis code is set	-
301	ABS control	ABS control when the diagnosis code is generated :OFF/ON	-
401	FL wheel speed sensor	Wheel speed (FL) when the diagnosis code is generated	km/h
402	FR wheel speed sensor	Wheel speed (FR) when the diagnosis code is generated	km/h
403	RL wheel speed sensor	Wheel speed (RL) when the diagnosis code is generated	km/h
404	RR wheel speed sensor	Wheel speed (RR) when the diagnosis code is generated	km/h

FAIL-SAFE FUNCTION

If any malfunction is detected by the self-diagnostic function, ABS-ECU illuminates the ABS warning lamp and brake warning lamp^*, and it disables ABS and EBD control.

note

*: The brake warning lamp and display are used as EBD control warning lamp.

Illumination condition of warning lamp and display in case of failure

Diagnosis code No.	Item		Countermeasures for failure
			Brake warning lamp	Brake warning display	ABS warning lamp	ABS warning display
C100A	FL wheel speed sensor circuit		OFF^*1	OFF^*1	ON^*2	ON^*2
C1015	FR wheel speed sensor circuit
C1020	RL wheel speed sensor circuit
C102B	RR wheel speed sensor circuit
C1011	FL wheel speed sensor signal		OFF^*1	OFF^*1	ON^*2	ON^*2
C101C	FR wheel speed sensor signal
C1027	RL wheel speed sensor signal
C1032	RR wheel speed sensor signal
C1014	FL wheel speed sensor performance		OFF^*1	OFF^*1	ON^*2	ON^*2
C101F	FR wheel speed sensor performance
C102A	RL wheel speed sensor performance
C1035	RR wheel speed sensor performance
C1041	FL wheel speed tone performance		OFF^*1	OFF^*1	ON^*2	ON^*2
C1042	FR wheel speed tone performance
C1043	RL wheel speed tone performance
C1044	RR wheel speed tone performance
C1046	FL wheel speed sensor phase		OFF^*1	OFF^*1	ON^*2	ON^*2
C1047	FR wheel speed sensor phase
C1048	RL wheel speed sensor phase
C1049	RR wheel speed sensor phase
C104B	FL inlet valve		ON	ON	ON	ON
C104F	FR inlet valve
C1053	RL inlet valve
C1057	RR inlet valve
C105F	FL outlet valve		ON	ON	ON	ON
C1063	FR outlet valve
C1067	RL outlet valve
C105B	RR outlet valve
C2104	Valve power supply circuit		ON	ON	ON	ON
C1073	Motor drive circuit		OFF	OFF	ON^*2	ON^*2
C2116	Pump motor voltage low		OFF	OFF	ON^*2	ON^*2
C1000	Brake SW (stuck)		OFF	OFF	OFF	OFF
C2200	ECU internal error		ON^*3	ON^*3	ON^*3	ON^*3
C2101	Power supply high voltage	18.0 ± 1.0 V or more	ON	ON	ON	ON
C1395	Incomplete Brake fluid filling^*6		OFF	OFF	Flashes (2 Hz)	ON
C1210	Longitudinal G sensor input circuit^*4		OFF	OFF	ON	ON
C1242	Longitudinal G sensor signal^*4		OFF	OFF	ON	ON
C123A	Sensor calibration^*4		OFF	OFF	ON	ON
C1608	EEPROM fail		OFF	OFF	OFF	OFF
C1707	Implausible coding data		OFF	OFF	ON	ON
C2002	Valve calibration not completed		OFF	OFF	ON	ON
C2204	Sensor cluster internal error^*4		OFF	OFF	ON	ON
U0114	4WD CAN timeout		OFF	OFF	OFF	OFF
U0141	ETACS CAN timeout		OFF	OFF	OFF	OFF
U1073	Bus-off		OFF	OFF	OFF	OFF
U1195	Coding not completed		OFF	OFF	ON	ON
U1197	Coding data unavailable		OFF	OFF	ON	ON

note

^*1 :Turns ON when two or more wheels are faulty.
^*2 :Stays ON until the vehicle speed reaches 10 km/h when the ignition switch is turned to ON next time, even if the malfunction is repaired and returns to normal condition.
^*3 :May not illuminate depending on the trouble cause.
^*4 :4WD

Under EBD and ABS control in case of failure

Diagnosis code No.	Item		Countermeasures for failure
			EBD control	ABS control
C100A	FL wheel speed sensor circuit		Executed^*1	Prohibited
C1015	FR wheel speed sensor circuit
C1020	RL wheel speed sensor circuit
C102B	RR wheel speed sensor circuit
C1011	FL wheel speed sensor signal		Executed^*1	Prohibited
C101C	FR wheel speed sensor signal
C1027	RL wheel speed sensor signal
C1032	RR wheel speed sensor signal
C1014	FL wheel speed sensor performance		Executed^*1	Prohibited
C101F	FR wheel speed sensor performance
C102A	RL wheel speed sensor performance
C1035	RR wheel speed sensor performance
C1041	FL wheel speed tone performance		Executed^*1	Prohibited
C1042	FR wheel speed tone performance
C1043	RL wheel speed tone performance
C1044	RR wheel speed tone performance
C1046	FL wheel speed sensor phase		Executed^*1	Prohibited
C1047	FR wheel speed sensor phase
C1048	RL wheel speed sensor phase
C1049	RR wheel speed sensor phase
C104B	FL inlet valve		Prohibited	Prohibited
C104F	FR inlet valve
C1053	RL inlet valve
C1057	RR inlet valve
C105F	FL outlet valve		Prohibited	Prohibited
C1063	FR outlet valve
C1067	RL outlet valve
C105B	RR outlet valve
C2104	Valve power supply circuit		Prohibited	Prohibited
C1073	Motor drive circuit		Executed	Prohibited
C2116	Pump motor voltage low		Executed	Prohibited
C1000	Brake SW (stuck)		Executed	Executed
C2200	ECU internal error		Prohibited^*2	Prohibited^*2
C2101	Power supply high voltage	18.0 ± 1.0 V or more	Prohibited	Prohibited
C1395	Incomplete Brake fluid filling		Executed	Executed
C1210	Longitudinal G sensor input circuit^*3		Executed	Prohibited
C1242	Longitudinal G sensor signal^*3		Executed	Prohibited
C123A	Sensor calibration^*3		Executed	Prohibited
C1608	EEPROM fail		Executed	Executed
C1707	Implausible coding data		Executed	Prohibited
C2002	Valve calibration not completed		Executed	Prohibited
C2204	Sensor cluster internal error^*3		Executed	Prohibited
U0114	4WD CAN timeout		Executed	Executed
U0141	ETACS CAN timeout		Executed	Executed
U1073	Bus-off		Executed	Executed
U1195	Coding not completed		Executed	Prohibited
U1197	Coding data unavailable		Executed	Prohibited

note

^*1: Prohibited when two or more wheels are faulty.
^*2: Not prohibited when the brake warning lamp is not ON.
^*3: 4WD

HOW TO READ DIAGNOSIS CODE

caution

When reading a diagnosis code, be sure to read it after erasing once because the diagnosis code could be set as a past trouble.

Refer to GROUP 00 - How to Use Troubleshooting and Inspection Service Points

HOW TO ERASE DIAGNOSIS CODE

Refer to GROUP 00 - How to Use Troubleshooting and Inspection Service Points