ELECTRONICALLY CONTROLLED BRAKE SYSTEM > DIAGNOSTIC TROUBLE CODE CHART

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NOTICE:
When replacing the brake booster with master cylinder (skid control ECU), sensor, etc., make sure that the power switch is turned off, the stop light switch is off, and 2 minutes have elapsed since the driver's door was closed.

HINT:
  1. If no abnormality is found when inspecting parts, inspect the skid control ECU and ground points for poor connections.
  2. If a trouble code is displayed during the DTC check, check the circuit indicated by the DTC. For details of each code, refer to the page for the respective "DTC Code" in the DTC chart.
  3. When 2 or more DTCs are detected, perform circuit inspections one by one until the problem is identified.
  4. Inspect the fuses and relays before inspecting the trouble areas as shown in the table below.


ABS DTC 
DTC Code
Detection Item
INF Code
Trouble Area
See page
42
Electronically Controlled Brake System Malfunction
-
Electronically controlled brake system
 Click here
C1235/35
Foreign Object is Attached on Tip of Front Speed Sensor RH
541
1. Speed sensor rotor malfunction (foreign object attached)
2. Foreign object attached to speed sensor
3. Open or short in speed sensor
4. Open or short in wire harness
5. Improperly connected connector, deformation or corrosion of terminals
6. Resistance in speed sensor circuit
7. Brake booster with master cylinder (Skid control ECU)
 Click here
C1236/36
Foreign Object is Attached on Tip of Front Speed Sensor LH
542
1. Speed sensor rotor malfunction (foreign object attached)
2. Foreign object attached to speed sensor
3. Open or short in speed sensor
4. Open or short in wire harness
5. Improperly connected connector, deformation or corrosion of terminals
6. Resistance in speed sensor circuit
7. Brake booster with master cylinder (Skid control ECU)
 Click here
C1238/38
Foreign Object is Attached on Tip of Rear Speed Sensor RH
543
1. Speed sensor rotor malfunction (foreign object attached)
2. Foreign object attached to speed sensor
3. Open or short in speed sensor
4. Open or short in wire harness
5. Improperly connected connector, deformation or corrosion of terminals
6. Resistance in speed sensor circuit
7. Brake booster with master cylinder (Skid control ECU)
 Click here
C1239/39
Foreign Object is Attached on Tip of Rear Speed Sensor LH
544
1. Speed sensor rotor malfunction (foreign object attached)
2. Foreign object attached to speed sensor
3. Open or short in speed sensor
4. Open or short in wire harness
5. Improperly connected connector, deformation or corrosion of terminals
6. Resistance in speed sensor circuit
7. Brake booster with master cylinder (Skid control ECU)
 Click here
C1243/43
Acceleration Sensor Stuck Malfunction
561
562
563
564
Yaw rate and acceleration sensor internal stuck malfunction
 Click here
C1244/44
Open or Short in Acceleration Sensor Circuit
571
1. Yaw rate and acceleration sensor installed improperly
2. Yaw rate and acceleration sensor
 Click here
C1245/45
Acceleration Sensor Output Malfunction
581
1. Yaw rate and acceleration sensor installed improperly
2. Yaw rate and acceleration sensor
 Click here
C1336/98
Zero Point Calibration of Acceleration Sensor Undone
-
1. Zero point calibration undone
2. Yaw rate and acceleration sensor
3. Brake booster with master cylinder (Skid control ECU)
(Perform zero point calibration and check for DTCs. If no DTCs are output again, the sensor is normal.)
 Click here
C1381/97
Acceleration Sensor Power Supply Voltage Malfunction
601
1. Yaw rate and acceleration sensor supply voltage shut down
2. Yaw rate and acceleration sensor
3. Brake booster with master cylinder (Skid control ECU)
 Click here
C1442/44
Invalid Data Received from Acceleration Sensor
572
Yaw rate and acceleration sensor
 Click here
C1464/31
Front Speed Sensor RH Circuit
501
502
503
504
506
507
508
1. Open or short in speed sensor
2. Improperly installed speed sensor, or abnormal clearance between sensor and rotor
3. Open or short in wire harness
4. Improperly connected connector, deformation or corrosion of terminals
5. Front speed sensor RH
6. Brake booster with master cylinder (Skid control ECU)
 Click here
C1465/32
Front Speed Sensor LH Circuit
511
512
513
514
516
517
518
1. Open or short in speed sensor
2. Improperly installed speed sensor, or abnormal clearance between sensor and rotor
3. Open or short in wire harness
4. Improperly connected connector, deformation or corrosion of terminals
5. Front speed sensor LH
6. Brake booster with master cylinder (Skid control ECU)
 Click here
C1466/33
Rear Speed Sensor RH Circuit
521
522
523
524
526
527
528
1. Open or short in speed sensor
2. Improperly installed speed sensor, or abnormal clearance between sensor and rotor
3. Open or short in wire harness
4. Improperly connected connector, deformation or corrosion of terminals
5. Rear speed sensor RH
6. Brake booster with master cylinder (Skid control ECU)
 Click here
C1467/34
Rear Speed Sensor LH Circuit
531
532
533
534
536
537
538
1. Open or short in speed sensor
2. Improperly installed speed sensor, or abnormal clearance between sensor and rotor
3. Open or short in wire harness
4. Improperly connected connector, deformation or corrosion of terminals
5. Rear speed sensor LH
6. Brake booster with master cylinder (Skid control ECU)
 Click here
U0124/95
Lost Communication with Lateral Acceleration Sensor Module
591
592
1. CAN communication line (CAN No. 1 bus)
2. Yaw rate and acceleration sensor
3. Brake booster with master cylinder (Skid control ECU)
 Click here

VSC DTC 
DTC Code
Detection Item
INF Code
Trouble Area
See page
43
ABS Control System Malfunction
-
ABS control system
 Click here
45
Electronically Controlled Brake System Malfunction
-
Electronically controlled brake system
 Click here
C1210/36
Zero Point Calibration of Yaw Rate Sensor Undone
-
1. Zero point calibration undone
2. Yaw rate and acceleration sensor
3. Brake booster with master cylinder (Skid control ECU)
(Perform zero point calibration and check for DTCs. If no DTCs are output again, the sensor is normal.)
 Click here
C1231/31
Steering Angle Sensor Circuit Malfunction
701
702
703
Steering angle sensor internal malfunction
 Click here
C1234/34
Yaw Rate Sensor Malfunction
711
712
713
714
Yaw rate and acceleration sensor internal malfunction
 Click here
C1290/66
Steering Angle Sensor Zero Point Malfunction
751
1. Yaw rate and acceleration sensor zero point calibration incomplete
2. Poor adjustment of the center position of the steering wheel
3. Poor adjustment of front wheel alignment
 Click here
C1310/51
Malfunction in HV system
-
Power management control ECU
 Click here
C1380/64
Stop Light Control Relay Malfunction
761
762
1. Stop light switch
2. Stop light switch circuit
3. Stop light control relay
4. Stop light control relay circuit
5. Brake booster with master cylinder (Skid control ECU)
 Click here
C1439/66
Steering Angle Sensor Initialization Incomplete
752
1. Steering angle sensor
2. Yaw rate and acceleration sensor
3. Brake booster with master cylinder (Skid control ECU)
 Click here
C1440/98
Unusual Bank Angle Detected
-
Yaw rate and acceleration sensor
 Click here
C1443/34
Invalid Data Received from Yaw Rate Sensor
715
Yaw rate and acceleration sensor
 Click here
C1445/66
Vehicle Driven with Steering Angle Sensor not Initialized
753
1. Steering angle sensor
2. Yaw rate and acceleration sensor
3. Brake booster with master cylinder (Skid control ECU)
 Click here
U0123/62
Lost Communication with Yaw Rate Sensor Module
731
732
1. CAN communication line (CAN No. 1 bus)
2. Yaw rate and acceleration sensor
3. Brake booster with master cylinder (Skid control ECU)
 Click here
U0126/63
Lost Communication with Steering Angle Sensor Module
741
742
1. CAN communication line (CAN No. 1 bus)
2. Steering angle sensor
3. Brake booster with master cylinder (Skid control ECU)
 Click here

Electronically Controlled Brake System DTC 
DTC Code
Detection Item
INF Code
Trouble Area
See page
36
ABS Control System Malfunction
-
ABS control system
 Click here
C1202/68
Master Reservoir Level Malfunction
371
1. Low brake fluid level
2. Brake fluid leaks
3. Brake master cylinder reservoir (Brake fluid level warning switch) internal open circuit
4. Brake master cylinder reservoir (Brake fluid level warning switch) internal short circuit
5. Open in wire harness
6. Short in wire harness
7. Brake disc rotor excessive wear
8. Brake booster with master cylinder (Skid control ECU)
 Click here
C1203/95
ECM Communication Circuit Malfunction
-
1. The wrong ECU or sensor was installed
2. Brake booster with master cylinder (Skid control ECU)
 Click here
C1211/25
SLA Linear Solenoid
21
22
23
24
1. Supply voltage reduced
2. Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1212/26
SLR Linear Solenoid
31
32
33
34
1. Supply voltage reduced
2. Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1214/62
Hydraulic Control System Malfunction
431
432
433
434
435
436
437
438
1. Brake fluid leaks
2. Brake disc rotor excessive wear
3. Brake booster with master cylinder (Brake actuator)
 Click here
C1225/31
SA1 Solenoid Circuit
41
42
43
44
1. Supply voltage reduced
2. Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1226/32
SA2 Solenoid Circuit
51
52
53
54
1. Supply voltage reduced
2. Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1227/33
SA3 Solenoid Circuit
61
62
63
64
1. Supply voltage reduced
2. Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1228/34
STR Solenoid Circuit
71
72
73
74
1. Supply voltage reduced
2. Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1242/42
Open in IG1 / IG2 Power Source Circuit
111
112
1. Open or short in IG1 circuit
2. Open or short in IG2 circuit
3. Improperly connected connector, deformation or corrosion of terminals
4. Entry and start system (IG start circuit)
5. Auxiliary battery
6. Hybrid control system (Charging circuit)
7. Brake booster with master cylinder (Skid control ECU)
 Click here
C1246/46
Master Cylinder Pressure Sensor Malfunction
201
202
203
204
207
1. Brake pedal stroke sensor
2. Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1247/47
Stroke Sensor Malfunction
211
212
213
214
215
218
219
223
1. Open or short in brake pedal stroke sensor power supply circuit
2. Open or short in wire harness
3. Improperly connected connector, deformation or corrosion of terminals
4. Brake pedal stroke sensor
5. Brake booster with master cylinder (Skid control ECU)
 Click here
C1249/49
Open in Stop Light Switch Circuit
231
1. STOP fuse
2. Stop light switch
3. Stop light switch circuit
4. Brake booster with master cylinder (Skid control ECU)
 Click here
C1252/52
Brake Booster Pump Motor on Time Abnormally Long
311
1. Short in motor circuit or motor monitor circuit
2. Motor relay stuck
3. Accumulator pressure sensor malfunction in brake actuator
4. Brake booster with master cylinder (Skid control ECU)
 Click here
C1253/53
Pump Motor Relay Malfunction
321
322
323
324
325
326
327
328
329
1. Open or short in motor circuit or motor monitor circuit
2. Brake booster with master cylinder (Skid control ECU)
 Click here
C1256/56
Accumulator Low Pressure
341
1. Accumulator pressure dropped due to frequent brake pedal operation (not a malfunction)
2. Pump motor malfunction
3. Accumulator deterioration
4. Accumulator pressure sensor
5. Supply voltage reduced
 Click here
C1257/57
Power Supply Drive Circuit
361
362
Brake booster with master cylinder (Skid control ECU)
 Click here
C1259/58
HV System Regenerative Malfunction
-
Power management control ECU
 Click here
C1300
Skid Control ECU Malfunction
-
Brake booster with master cylinder (Skid control ECU)
 Click here
C1311/11
Open in Main Relay 1 Circuit
1
1. Open or short in ABS main relay circuit
2. Brake booster with master cylinder (Skid control ECU)
 Click here
C1312/12
Short in Main Relay 1 Circuit
2
1. Short in ABS main relay circuit
2. ABS main relay internal stuck
3. Brake booster with master cylinder (Skid control ECU)
 Click here
C1345/66
Linear Solenoid Valve Offset Learning Undone
-
Perform linear valve offset learning and check for DTCs. If no DTCs are output again, the valve is normal.
 Click here
C1352/21
FR Solenoid
11
12
Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1353/23
RR Solenoid
15
16
Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1356/22
FL Solenoid
13
14
Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1357/24
RL Solenoid
17
18
Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1364/61
Wheel Cylinder Pressure Sensor Malfunction
421
422
423
424
426
Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1365/54
Accumulator Pressure Sensor Malfunction
331
332
333
334
Brake booster with master cylinder (Skid control ECU or brake actuator)
 Click here
C1368/67
Linear Solenoid Valve Offset Malfunction
-
1. Perform linear valve offset learning and check for DTCs. If no DTCs are output again, the valve is normal.
2. Brake booster with master cylinder (Brake actuator)
 Click here
C1391/69
Accumulator Leak Malfunction
351
1. Brake fluid leaks
2. Brake booster with master cylinder (Brake actuator)
(Malfunctioning internal seal, low gas pressure in accumulator, etc.)
 Click here
C1392/48
Stroke Sensor Zero Point Calibration Undone
-
1. Brake pedal stroke sensor zero point calibration incomplete (Initialization and calibration of linear solenoid valve incomplete)
2. Brake booster with master cylinder (Skid control ECU)
 Click here
C1451/72
Motor Drive Permission Malfunction
-
1. Brake fluid leaks
2. Air bleeding not performed
 Click here
U0073/94
Control Module Communication Bus OFF
461
462
463
464
465
466
1. CAN communication line (CAN No. 1 bus)
2. Yaw rate and acceleration sensor
3. Steering angle sensor
4. Brake booster with master cylinder (Skid control ECU)
 Click here
U0293/59
Communication Error from HV ECU
411
412
413
1. CAN communication line (Power management bus)
2. Power management control ECU
3. Brake booster with master cylinder (Skid control ECU)
 Click here

ABS and Electronically Controlled Brake System DTC 
DTC Code
Detection Item
INF Code
Trouble Area
See page
C1241/41
Low Battery Positive Voltage
101*1
102*2
551*2
552*2
553*2
1. Improperly connected connector, deformation or corrosion of terminals
2. Auxiliary battery
3. Hybrid control system (Charging circuit)
4. Brake booster with master cylinder (Skid control ECU)
 Click here
*1: Electronically Controlled Brake System DTC
*2: ABS DTC

ABS Test Mode DTC 
DTC Code
Detection Item
INF Code
Trouble Area
See page
C1271/71
Low Output Signal of Front Speed Sensor RH (Test Mode DTC)
-
1. Front speed sensor RH
2. Sensor installation
3. Speed sensor rotor
 Click here
C1272/72
Low Output Signal of Front Speed Sensor LH (Test Mode DTC)
-
1. Front speed sensor LH
2. Sensor installation
3. Speed sensor rotor
 Click here
C1273/73
Low Output Signal of Rear Speed Sensor RH (Test Mode DTC)
-
1. Rear speed sensor RH
2. Sensor installation
3. Speed sensor rotor
 Click here
C1274/74
Low Output Signal of Rear Speed Sensor LH (Test Mode DTC)
-
1. Rear speed sensor LH
2. Sensor installation
3. Speed sensor rotor
 Click here
C1275/75
Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC)
-
1. Front speed sensor RH
2. Speed sensor rotor
 Click here
C1276/76
Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)
-
1. Front speed sensor LH
2. Speed sensor rotor
 Click here
C1277/77
Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC)
-
1. Rear speed sensor RH
2. Speed sensor rotor
 Click here
C1278/78
Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)
-
1. Rear speed sensor LH
2. Speed sensor rotor
 Click here
C1279/79
Acceleration Sensor Output Voltage Malfunction (Test Mode DTC)
-
1. Sensor installation
2. Yaw rate and acceleration sensor
 Click here
C1281/81
Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC)
-
1. Stop light switch
2. Regulator pressure sensor
 Click here

Electronically Controlled Brake System Test Mode DTC 
DTC Code
Detection Item
INF Code
Trouble Area
See page
C1346/71
Stroke Sensor Zero Point Learning Malfunction (Test Mode DTC)
-
1. Brake pedal stroke sensor
2. Brake pedal stroke sensor circuit
 Click here