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 ).

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 is used as EBD control warning lamp.

Illumination condition of warning lamp in case of failure

Diagnosis code No.	Item		Countermeasures for failure
			Brake warning lamp	ABS warning lamp
C1200	Abnormality in FR wheel speed sensor circuit		Extinguished^*4	Illuminates
C1205	Abnormality in FL wheel speed sensor circuit
C1210	Abnormality in RR wheel speed sensor circuit
C1215	Abnormality in RL wheel speed sensor circuit
C1201^*1	Abnormality in FR wheel speed sensor signal
C1206^*1	Abnormality in FL wheel speed sensor signal
C1211^*1	Abnormality in RR wheel speed sensor signal
C1216^*1	Abnormality in RL wheel speed sensor signal
C1225^*1	Wheel speed sensor system malfunction (abnormality in tyre size)		Illuminates	Illuminates
C1226^*2	Abnormality in FR wheel inlet valve system		Illuminates	Illuminates
C1236^*2	Abnormality in FL wheel inlet valve system
C1246^*2	Abnormality in RR wheel inlet valve system
C1256^*2	Abnormality in RL wheel inlet valve system
C1231^*2	Abnormality in FR wheel outlet valve system		Illuminates	Illuminates
C1241^*2	Abnormality in FL wheel outlet valve system
C1251^*2	Abnormality in RR wheel outlet valve system
C1261^*2	Abnormality in RL wheel outlet valve system
C1266^*2	Abnormality in pump motor (stuck)		Illuminates	Illuminates
C1273^*2	Abnormality in pump motor relay (stuck off)
C1274^*2	Abnormality in pump motor relay (stuck on)
C1276	Abnormality in valve relay system		Illuminates	Illuminates
C1278	Abnormality in valve relay system (stuck off)
C1279	Abnormality in valve relay system (stuck on)		Extinguished	Illuminates
C1340	Abnormality in stop lamp switch		Illuminates	Illuminates
C1345	Abnormality in brake fluid level (low)		Illuminates	Illuminates
C1607	Abnormality in ABS-ECU		Extinguished	Illuminates
C1860	Abnormality in battery voltage (high voltage)	16.8 ± 1.0 V or more	Illuminates	Illuminates
C1861^*3	Abnormality in battery voltage (low voltage)	9.6 ± 0.3 V or less	Illuminates	Illuminates
U1073	Bus off		Extinguished	Illuminates
U1109	ETACS CAN time-out error		Extinguished	Illuminates

note

^*1: This diagnosis code will not be set when diagnosis code C1860 or C1861 is stored.
^*2: This diagnosis code will not be set when diagnosis code C1278 or C1861 is stored.
^*3: This diagnosis code is not set within the vehicle speed of 6 km/h or less.
^*4 Turns ON when two or more wheels are faulty.

Under EBD and ABS control in case of failure

Diagnosis code No.	Item		Countermeasures for failure
			EBD control	ABS control
C1200	Abnormality in FR wheel speed sensor circuit		Executed (Prohibited when two or more wheels are faulty.)^*4	Prohibited
C1205	Abnormality in FL wheel speed sensor circuit
C1210	Abnormality in RR wheel speed sensor circuit
C1215	Abnormality in RL wheel speed sensor circuit
C1201^*1	Abnormality in FR wheel speed sensor signal
C1206^*1	Abnormality in FL wheel speed sensor signal
C1211^*1	Abnormality in RR wheel speed sensor signal
C1216^*1	Abnormality in RL wheel speed sensor signal
C1225^*1	Wheel speed sensor system malfunction (abnormality in tyre size)		Prohibited	Prohibited
C1226^*2	Abnormality in FR wheel inlet valve system		Prohibited	Prohibited
C1236^*2	Abnormality in FL wheel inlet valve system
C1246^*2	Abnormality in RR wheel inlet valve system
C1256^*2	Abnormality in RL wheel inlet valve system
C1231^*2	Abnormality in FR wheel outlet valve system		Prohibited	Prohibited
C1241^*2	Abnormality in FL wheel outlet valve system
C1251^*2	Abnormality in RR wheel outlet valve system
C1261^*2	Abnormality in RL wheel outlet valve system
C1266^*2	Abnormality in pump motor (stuck)		Prohibited	Prohibited
C1273^*2	Abnormality in pump motor relay (stuck off)
C1274^*2	Abnormality in pump motor relay (stuck on)
C1276	Abnormality in valve relay system		Prohibited	Prohibited
C1278	Abnormality in valve relay system (stuck off)
C1279	Abnormality in valve relay system (stuck on)
C1340	Abnormality in stop lamp switch		Executed	Prohibited
C1345	Abnormality in brake fluid level (low)		Prohibited	Prohibited
C1607	Abnormality in ABS-ECU		Prohibited	Prohibited
C1860	Abnormality in battery voltage (high voltage)	16.8 ± 1.0 V or more	Prohibited	Prohibited
C1861^*3	Abnormality in battery voltage (low voltage)	9.6 ± 0.3 V or less	Prohibited	Prohibited
U1073	Bus off		Executed	Prohibited
U1109	ETACS CAN time-out error		Executed	Prohibited

note

^*1: This diagnosis code will not be set when diagnosis code C1860 or C1861 is stored.
^*2: This diagnosis code will not be set when diagnosis code C1278 or C1861 is stored.
^*3: This diagnosis code is not set within the vehicle speed of 6 km/h or less.
^*4 Executed when two or more wheels are faulty.

HOW TO READ DIAGNOSIS CODE

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