05–987
DIAGNOSTICS – ELECTRONICALLY CONTOROLLED BRAKE SYSTEM
05IZA–01
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If a malfunction code is displayed during the DTC check, check the circuit indicated by the DTC. For details
of each code, turn to the page for the respective ”DTC No.” in the DTC chart.
DTC chart of ABS:
DTC No.
Detection Item Trouble Area
(See page)
Right front speed sensor
C0200/31 Speed sensor circuit
Right front wheel speed sensor signal malfunction
(05–991) Sensor rotor
Sensor installation
Left front speed sensor
C0205/32 Speed sensor circuit
Left front wheel speed sensor signal malfunction
(05–991) Sensor rotor
Sensor installation
Right rear speed sensor
C0210/33 Speed sensor circuit
Right rear wheel speed sensor signal malfunction
(05–998) Sensor rotor
Sensor installation
Left rear speed sensor
C0215/34 Speed sensor circuit
Left rear wheel speed sensor signal malfunction
(05–998) Sensor rotor
Sensor installation
Right front speed sensor
C1235/35
Metal stick to speed sensor (FR) Speed sensor circuit
(05–1015)
Sensor installation
Left front speed sensor
C1236/36
Metal stick to speed sensor (FL) Speed sensor circuit
(05–1015)
Sensor installation
Right rear speed sensor
C1238/38
Metal stick to speed sensor (RR) Speed sensor circuit
(05–1015)
Sensor installation
Left rear speed sensor
C1239/39
Metal stick to speed sensor (RL) Speed sensor circuit
(05–1015)
Sensor installation
C1243/43 Yaw rate (deceleration) sensor
Malfunction in deceleration sensor (constant output)
(05–1006) Skid control ECU
Yaw rate (deceleration) sensor
C1244/44 Yaw rate (deceleration) sensor installation
Open or short circuit in deceleration sensor circuit
(05–1006) Zero point calibration not done
Skid control ECU
Yaw rate (deceleration) sensor
C1245/45
Malfunction in deceleration sensor Zero point calibration not done
(05–1006)
Skid control ECU
Yaw rate (deceleration) sensor circuit
C1381/97 Malfunction in power supply voltage of yaw/deceleration
Harness and connector
(05–1006) sensor
Skid control ECU
2004 Prius – Preliminary Release (RM1075U)
Author: Date: 1151
05–988
DIAGNOSTICS – ELECTRONICALLY CONTOROLLED BRAKE SYSTEM
(1) Drive the vehicle at the vehicle speed of 31 mph (50 km/h) and keep depressing the brake pedal
strongly for approximately 3 seconds.
(2) Repeat the above operation 3 times or more and check that the ABS warning light goes off.
(3) Clear the DTC (see page 05–975).
HINT:
In some cases, the intelligent tester II cannot be used when ABS warning light remains on.
DTC chart of Enhanced VSC:
DTC No.
Detection Item Trouble Area
(See page)
Zero point calibration undone (Perform zero point calibration
C1210/36
Zero point calibration of yaw rate sensor undone and check DTC. If DTC is not output again, the sensor is
(05–1006)
normal.)
C1231/31 Steering angle sensor
Malfunction in steering angle sensor
(05–1011) Skid control ECU
C1232/32 Yaw rate (deceleration) sensor
Malfunction in deceleration sensor
(05–1006) Skid control ECU
C1234/34
Malfunction in yaw rate sensor Yaw rate (deceleration) sensor
(05–1006)
C1310/51
Malfunction in HV system Hybrid control system (Enhanced VSC, TRAC system)
(05–1055)
Zero point calibration undone (Perform zero point calibration
C1336/39
Zero point calibration of deceleration sensor undone and check DTC. If DTC is not output again, the sensor is
(05–1006)
normal.)
DTC chart of ECB:
DTC No.
Detection Item Trouble Area
(See page)
Brake fluid level
C1202/68 Brake fluid level low / Open circuit in brake fluid level warning Brake fluid level warning switch
(05–1003) switch circuit Harness and connector
Skid control ECU
ABS No.1 relay
ABS No.2 relay
C1241/41 Low battery positive voltage or abnormally high battery positive Harness and connector
(05–1019) voltage Skid control power supply circuit
Brake control power supply assy
Hybrid control system
ABS No.1 relay
ABS No.2 relay
C1242/42 Harness and connector
Open circuit in IG2 circuit
(05–1019) Skid control power supply circuit
Brake control power supply assy
Hybrid control system
Brake actuator assy
C1246/46
Malfunction in master cylinder pressure sensor Skid control ECU
(05–1027)
Harness and connector
Brake pedal stroke sensor
C1247/47
Malfunction in stroke sensor Skid control ECU
(05–1034)
Harness and connector
2004 Prius – Preliminary Release (RM1075U)
Author: Date: 1152
05–989
DIAGNOSTICS – ELECTRONICALLY CONTOROLLED BRAKE SYSTEM
Stop lamp switch
C1249/49
Open circuit in stop light switch circuit Stop lamp switch circuit
(05–1039)
Stop lamp bulb
C1252/52
Hydro–booster pump motor malfunction Brake actuator assy
(05–1045)
ABS MTR relay
C1253/53 ABS MTR2 relay
Hydro–booster pump motor relay malfunction
(05–1045) Harness and connector
Brake actuator assy
C1256/57 Brake actuator assy (accumulator pressure, accumulator
Accumulator low pressure malfunction
(05–1053) pressure sensor, pump motor)
C1259/58
HV system regenerative malfunction Hybrid control system
(05–1055)
C1300/–
Malfunction in ECU Skid control ECU
(05–1057)
ABS No.1 relay
C1311/11
Open circuit in main relay 1 Skid control ECU
(05–1058)
Harness and connector
ABS No.1 relay
C1312/12
Short circuit in main relay 1 Skid control ECU
(05–1058)
Harness and connector
ABS No.2 relay
C1313/13
Open circuit in main relay 2 Skid control ECU
(05–1058)
Harness and connector
ABS No.2 relay
C1314/14
Short circuit in main relay 2 Skid control ECU
(05–1058)
Harness and connector
Brake actuator assy (SMC1)
C1315/31
Changeover solenoid malfunction(SMC1) Skid control ECU
(05–1066)
Harness and connector
Brake actuator assy (SMC2)
C1316/32
Changeover solenoid malfunction(SMC2) Skid control ECU
(05–1066)
Harness and connector
Stroke simulator
C1319/35
Changeover solenoid malfunction(SCSS) Skid control ECU
(05–1074)
Harness and connector
Fluid leakage
C1341/62
Malfunction in hydraulic system(FR) Brake actuator assy
(05–1078)
Disc rotor
Fluid leakage
C1342/63
Malfunction in hydraulic system(FL) Brake actuator assy
(05–1078)
Disc rotor
Fluid leakage
C1343/64
Malfunction in hydraulic system(RR) Brake actuator assy
(05–1078)
Disc rotor
Fluid leakage
C1344/65
Malfunction in hydraulic system(RL) Brake actuator assy
(05–1078)
Disc rotor
C1345/66
Not learning linear valve offset abnormality Initialization of linear solenoid valve and calibration undone
(05–1087)
Brake actuator assy
C1352/21
Increasing pressure solenoid malfunction(FR) Skid control ECU
(05–1066)
Harness and connector
2004 Prius – Preliminary Release (RM1075U)
Author: Date: 1153
05–990
DIAGNOSTICS – ELECTRONICALLY CONTOROLLED BRAKE SYSTEM
Brake actuator assy
C1353/23
Increasing pressure solenoid malfunction(FL) Skid control ECU
(05–1066)
Harness and connector
Brake actuator assy
C1354/25
Increasing pressure solenoid malfunction(RR) Skid control ECU
(05–1066)
Harness and connector
Brake actuator assy
C1355/27
Increasing pressure solenoid malfunction(RL) Skid control ECU
(05–1066)
Harness and connector
Brake actuator assy
C1356/22
Decreasing pressure solenoid malfunction(FR) Skid control ECU
(05–1066)
Harness and connector
Brake actuator assy
C1357/24
Decreasing pressure solenoid malfunction(FL) Skid control ECU
(05–1066)
Harness and connector
Brake actuator assy
C1358/26
Decreasing pressure solenoid malfunction(RR) Skid control ECU
(05–1066)
Harness and connector
Brake actuator assy
C1359/28
Decreasing pressure solenoid malfunction(RL) Skid control ECU
(05–1066)
Harness and connector
Brake actuator assy
C1364/61
Malfunction in W/C pressure sensor Skid control ECU
(05–1027)
Harness and connector
C1365/54 Brake actuator assy (accumulator pressure sensor)
Malfunction in ACC pressure sensor
(05–1088) Skid control ECU
C1368/67 Initialization of linear solenoid valve and calibration undone
Linear valve offset malfunction
(05–1088) Skid control ECU
Brake control power supply
Harness and connector
C1377/43 ABS No.1 fuse
Capacitor malfunction
(05–1092) ABS No.2 fuse
ABS No.3 fuse
Apply high voltage
C1378/44 Harness and connector
Capacitor communication circuit malfunction
(05–1099) Skid control ECU
C1391/69 Fluid leakage
Abnormal leak of ACC PRESS
(05–1103) Brake actuator assy
Brake pedal stroke sensor zero point calibration undone (ini-
C1392/48
Un–correction of a zero point of the stroke sensor tialization of linear solenoid valve and calibration undone)
(05–1034)
Skid control ECU
2004 Prius – Preliminary Release (RM1075U)
Author: Date: 1154
