DIAGNOSTIC FUNCTION


ASTC-ECU has the following functions for easier system checks.

All the above items can be diagnosed using M.U.T.-III.

CHECK OF FREEZE FRAME DATA


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

When detecting fault and setting 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
Number of counts is displayed.
5
FL wheel ABS control
FL wheel ABS control when the diagnosis code is generated: OFF/ON
-
6
FR wheel ABS control
FR wheel ABS control when the diagnosis code is generated: OFF/ON
-
7
RL wheel ABS control
RL wheel ABS control when the diagnosis code is generated: OFF/ON
-
8
RR wheel ABS control
RR wheel ABS control when the diagnosis code is generated: OFF/ON
-
9
EBD control
EBD control when the diagnosis code is generated: OFF/ON
-
10
Brake assist control
Brake assist control when the diagnosis code is generated: OFF/ON
-
11
Engine control
Engine control when the diagnosis code is generated: OFF/ON
-
12
FL wheel TCL brake control
FL wheel traction control operation status (brake control) when the diagnosis code is generated: OFF/ON
-
13
FR wheel TCL brake control
FR wheel traction control operation status (brake control) when the diagnosis code is generated: OFF/ON
-
14
RL wheel TCL brake control
RL wheel traction control operation status (brake control) when the diagnosis code is generated: OFF/ON
-
15
RR wheel TCL brake control
RR wheel traction control operation status (brake control) when the diagnosis code is generated: OFF/ON
-
16
FL wheel A.S.C. brake control
FL wheel ASTC control when the diagnosis code is generated: OFF/ON
-
17
FR wheel A.S.C. brake control
FR wheel ASTC control when the diagnosis code is generated: OFF/ON
-
18
RL wheel A.S.C. brake control
RL wheel ASTC control when the diagnosis code is generated: OFF/ON
-
19
RR wheel A.S.C. brake control
RR wheel ASTC control when the diagnosis code is generated: OFF/ON
-
20
Motor run
Motor run condition when the diagnosis code is generated: OFF/ON
-
21
Stop lamp switch
Stop lamp switch condition when the diagnosis code is generated: OFF/ON
-
22
Parking brake switch
Parking brake switch condition when the diagnosis code is generated: OFF/ON
-
23
A.S.C. status
ASTC condition when the diagnosis code is generated: OFF/ON
-
24
HDC status
Hill descent control condition when the diagnosis code is generated: OFF/ON
-
25
Rear diff lock state
Rear differential lock detection switch condition when the diagnosis code is generated: OFF/ON
-
26
Off-road mode
Off road mode condition when the diagnosis code is generated: OFF/ON
-
27
Power supply voltage
Voltage of power supply when the diagnosis code is generated
V
28
Steering angle
Steering angle of steering wheel sensor when the diagnosis code is generated
deg
29
Yaw rate sensor
Yaw rate of G and yaw rate sensor when the diagnosis code is generated
deg/s
30
Longitudinal G sensor
Longitudinal G of G and yaw rate sensor when the diagnosis code is generated
G
31
Lateral G sensor
Lateral G of G and yaw rate sensor when the diagnosis code is generated
G
32
Master cylinder pressure
Master cylinder pressure of Master cylinder pressure sensor when the diagnosis code is generated
MPa
33
FL wheel speed sensor
Wheel speed (FL) when the diagnosis code is generated
km/h
34
FR wheel speed sensor
Wheel speed (FR) when the diagnosis code is generated
km/h
35
RL wheel speed sensor
Wheel speed (RL) when the diagnosis code is generated
km/h
36
RR wheel speed sensor
Wheel speed (RR) when the diagnosis code is generated
km/h

FAIL-SAFE FUNCTIONS




Illumination condition of warning lamp, indicator lamp and warning display in case of failure


Diagnosis code No.
Inspection item
Brake warning lamp/Brake warning display
ABS warning lamp/ABS warning display
ASTC indicator lamp/ASTC display
ASTC OFF indicator lamp
C1011
FL wheel speed sensor signal
OFF
ON
ON
ON
C101C
FR wheel speed sensor signal
OFF
ON
ON
ON
C1027
RL wheel speed sensor signal
OFF
ON
ON
ON
C1032
RR wheel speed sensor signal
OFF
ON
ON
ON
C1014
FL wheel speed sensor performance
OFF
ON
ON
ON
C101F
FR wheel speed sensor performance
OFF
ON
ON
ON
C102A
RL wheel speed sensor performance
OFF
ON
ON
ON
C1035
RR wheel speed sensor performance
OFF
ON
ON
ON
C1041
FL wheel speed sensor tone performance
OFF
ON
ON
ON
C1042
FR wheel speed sensor tone performance
OFF
ON
ON
ON
C1043
RL wheel speed sensor tone performance
OFF
ON
ON
ON
C1044
RR wheel speed sensor tone performance
OFF
ON
ON
ON
C1200
FR wheel speed sensor circuit
OFF
ON
ON
ON
C1205
FL wheel speed sensor circuit
OFF
ON
ON
ON
C1210
RR wheel speed sensor circuit
OFF
ON
ON
ON
C1215
RL wheel speed sensor circuit
OFF
ON
ON
ON
C1222
Wheel SPD.SNSR.power circuit
OFF
ON
ON
ON
C1225
Deviation between wheel speed
ON*2
ON
ON
ON
C1226
FR inlet valve
ON
ON
ON
ON
C1231
FR outlet valve
ON
ON
ON
ON
C1236
FL inlet valve
ON
ON
ON
ON
C1241
FL outlet valve
ON
ON
ON
ON
C1246
RR inlet valve
ON
ON
ON
ON
C1251
RR outlet valve
ON
ON
ON
ON
C1256
RL inlet valve
ON
ON
ON
ON
C1261
RL outlet valve
ON
ON
ON
ON
C1300
FR cut valve
ON
ON
ON
ON
C1305
FR suction valve
ON
ON
ON
ON
C1310
FL cut valve
ON
ON
ON
ON
C1315
FL suction valve
ON
ON
ON
ON
C1266
Motor stuck
ON
ON
ON
ON
C1271
Motor drive circuit
ON
ON
ON
ON
C1273
Motor drive circuit stuck off
ON
ON
ON
ON
C1274
Motor drive circuit stuck on
ON
ON
ON
ON
C1276
Valve power supply circuit
ON
ON
ON
ON
C1278
Valve power circuit stuck off
ON
ON
ON
ON
C1279
Valve power circuit stuck on
ON
ON
ON
ON
C1294
Abnormal rear differential lock detection circuit
OFF
ON
ON
ON
C1295
Transfer position error
OFF
OFF*5
ON
ON
C1340
Stop lamp switch
OFF
OFF*1
ON*4
OFF*1
C1346
Abnormal stop lamp circuit
OFF
OFF
ON*4
OFF
C1361
M/C pressure SNSR.stuck/low gain
OFF
ON
ON
ON
C1364
M/C pressure SNSR.malfunction
OFF
ON
ON
ON
C1366
Lateral G sensor (output error)
OFF
ON*3
ON
ON
C1371
Yaw rate sensor error
OFF
ON
ON
ON
C1381
G sensor (output error, seizure)
OFF
ON*3
ON
ON
C1385
Yaw rate sensor active check
OFF
ON*3
ON
ON
C1387
Lateral G sensor/G performance
OFF
ON*3
ON
ON
C1392
INCOMP.learn (Longitudinal G)
OFF
ON*3
ON
ON
C1394
INCOMP.learn neutral(SAS)
OFF
OFF
ON
ON
C1395
INCOMP. Brake fluid filling
OFF
ON
ON
ON
C1396
Engine torque input refusal
OFF
OFF
ON
ON
C1505
Steering angle sensor (signal seizure or abnormal neutral point)
OFF
OFF
ON
ON
C1506
Steering angle sensor error (steering wheel sensor malfunction)
OFF
OFF
ON
ON
C1555
Steering angle SNS.out of range
OFF
OFF
ON
ON
C1607
ECU failure
ON
ON
ON
ON
C1608
EEPROM fail
ON*2, *4
ON*2
ON
ON
C1707
Implausible coding data
ON
ON
ON
ON
C1860
Power supply high voltage
ON*2
ON
ON
ON
C1861
Power supply low voltage
ON*2
ON
ON
ON
C2206
Re-execution of variant coding
ON
ON
ON
ON
U0146
GATEWAY CAN timeout
OFF
OFF
ON*4
OFF
U0401
Engine (CAN message)
OFF
OFF
ON
ON
U0402
T/M (CAN message)
OFF
OFF
ON*4
ON*2
U0428
SAS (CAN message)
OFF
OFF
ON
ON
U1011
ACC/FCM Parity/Toggle bit error
OFF
OFF
ON*4
OFF
U1014
FCM (CAN message)
OFF
OFF
ON
OFF
U1073
Bus-off
OFF
ON
ON
ON
U1100
Engine CAN timeout
OFF
OFF
ON
ON
U1101
A/T-ECU timeout error
OFF
OFF
ON
ON
U1104
SAS CAN timeout
OFF
OFF
ON
ON
U1108
Meter CAN timeout
OFF
OFF
ON*4
OFF
U1109
ETACS CAN timeout
ON*2
ON*2
ON*2
ON*2
U1118
4WD/Transfer ECU CAN timeout
OFF
ON
ON
ON
U1195
Coding not completed
ON
ON
ON
ON
U1200
SAS parity error
OFF
OFF
ON
ON
U1204
SAS message counter error
OFF
OFF
ON
ON
U1211
ENG Parity/Toggle bit error
OFF
OFF
ON
ON
U15A0
ACC/FCM ECU CAN timeout
OFF
OFF
ON*4
OFF
note
  • *1: In some troubles, the waning lamp and the warning display are not activated.
  • *2: In some troubles, the waning lamp and the warning display are activated.
  • *3: On 2WD, the lamp does not come on.
  • *4: The warning display is not activated.

Under EBD, ABS, brake assist, HSA, TCL, ASTC, Hill descent control (HDC), TSA, FCM, ESS in case of failure


Diagnosis code No.
EBD
ABS
Brake assist
HSA
TCL
ASTC
HDC
TSA
FCM
ESS
C1011
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C101C
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1027
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1032
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1014
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C101F
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C102A
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1035
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1041
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1042
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1043
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1044
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1200
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1205
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1210
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1215
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1222
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1225
Enabled*1
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1226
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1231
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1236
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1241
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1246
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1251
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1256
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1261
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1300
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1305
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1310
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1315
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1266
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1271
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1273
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1274
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1276
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1278
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1279
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1294
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1295
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
C1340
Enabled
Enabled*1
Enabled*1
Prohibited
Enabled*1
Enabled*1
Enabled*1
Enabled*1
Enabled*1
Enabled*1
C1346
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Enabled
C1361
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1364
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1366
Enabled
Prohibited*3
Prohibited*3
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited*3
C1371
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
C1381
Enabled
Prohibited*3
Prohibited*3
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited*3
C1385
Enabled
Prohibited*3
Prohibited*3
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited*3
C1387
Enabled
Prohibited*3
Prohibited*3
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited*3
C1392
Enabled
Prohibited*3
Prohibited*3
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1394
Enabled
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
C1395
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1396
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
C1505
Enabled
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
C1506
Enabled
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
C1555
Enabled
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
C1607
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1608
Enabled*2
Enabled*2
Enabled*2
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled*2
C1707
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1860
Enabled*2
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C1861
Enabled*2
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
C2206
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
U0146
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Prohibited
Enabled
Enabled
Enabled
U0401
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
U0402
Enabled
Enabled
Enabled
Prohibited
Enabled*2
Enabled*2
Enabled*2
Enabled*2
Enabled*2
Enabled
U0428
Enabled
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
U1011
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Prohibited
Enabled
U1014
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Prohibited
Enabled
U1073
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
U1100
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
U1101
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
U1104
Enabled
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
U1108
Enabled
Enabled
Enabled
Prohibited
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
U1109
Enabled*2
Enabled*2
Enabled*2
Enabled*2
Enabled*2
Enabled*2
Enabled*2
Enabled*2
Enabled*2
Prohibited
U1118
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
U1195
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
U1200
Enabled
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
U1204
Enabled
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
U1211
Enabled
Enabled
Enabled
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Enabled
U15A0
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Prohibited
Enabled
note
  • *1: In some troubles, it is prohibited (disabled).
  • *2: In some troubles, it is enabled.
  • *3: On 2WD, it is enabled.

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 .