DESCRIPTION
This DTC is output when the VSC system detects a malfunction in the ABS control system.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| 43 | Malfunction in the ABS control system. | ABS control system |
DTC DETECTION CONDITION CHART
The speed sensors detect wheel speed and transmit the signals to the ECU. These signals are used for control of the ABS control system. Each of the front and rear rotors have 48 serrations. When the rotors rotate, the magnetic filed generated by the permanent magnet in the speed sensor induces an AC voltage.
Since the frequency of this AC voltage changes in direct proportion to the speed of the rotor, the frequency is used by the ECU to detect the speed of each wheel.
DTCs C1271/71 and C1272/72 can be deleted when the speed sensor sends a wheel speed signal or the Test Mode ends. DTCs C1271/71 and C1272/72 are output only in the Test Mode.
Scheme 1
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C0200/31 C0205/32 | When any of the following is detected: At a vehicle speed of 10 km/h (6 mph) or more, an open or short in the sensor signal circuit continues for 1 second or more. Momentary interruption of the sensor signal from the abnormal wheel occurs 7 times or more. An open in the speed sensor signal circuit continues for 0.5 seconds or more. | Front speed sensor RH/LH Speed sensor circuit Speed sensor rotor Sensor installation Brake actuator assembly (Skid control ECU) |
| C1271/71 C1272/72 | Detected only during Test Mode. | Front speed sensor RH/LH Sensor installation Speed sensor rotor |
DTC DETECTION CONDITION CHART
HINT
- DTCs C0200/31 and C1271/71 are for the front speed sensor RH.
- DTCs C0205/32 and C1272/72 are for the front speed sensor LH.
Scheme 2
The speed sensors detect wheel speed and transmit the signals to the ECU. These signals are used for control of the ABS control system. Each of the front and rear rotors have 48 serrations.
When the rotors rotate, the magnetic field generated by the permanent magnet in the speed sensor induces an AC voltage.
Since the frequency of this AC voltage changes in direct proportion to the speed of the rotor, the frequency is used by the ECU to detect the speed of each wheel.
DTCs C1273/73 and C1274/74 can be deleted when the speed sensor sends a wheel speed signal or the Test Mode ends. DTCs C1273/73 and C1274/74 are output only in the Test Mode.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C0210/33 C0215/34 | When any of the following is detected: At a vehicle speed of 10 km/h (6 mph) or more, an open or short in the sensor signal circuit continues for 1 second or more. Momentary interruption of the sensor signal from the abnormal wheel occurs 7 times or more. An open in the speed sensor signal circuit continues for 0.5 seconds or more. | Rear speed sensor RH/LH Speed sensor circuit Speed sensor rotor Sensor installation Brake actuator assembly (Skid control ECU) |
| C1273/73 C1274/74 | Detected only during Test Mode. | Rear speed sensor RH/LH Sensor installation Speed sensor rotor |
DTC DETECTION CONDITION CHART
HINT
- DTCs C0210/33 and C1273/73 are for the rear speed sensor RH.
- DTCs C0215/34 and C1274/74 are for the rear speed sensor LH.
Scheme 3
These solenoids turn on when signals are received from the skid control ECU and they control the pressure acting on the wheel cylinders to control the braking force.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C0226/21 C0236/22 C0246/23 C0256/24 | Open or short in the solenoid circuit continues for 0.05 seconds or more. | Brake actuator assembly Solenoid circuit |
| C1225/25 | When any of the following is detected: While outputting switching solenoid (SM1 or SM2) ON, overcurrent continues for 0.05 seconds or more. While outputting switching solenoid (SM1 or SM2) OFF, an open circuit continues for 0.05 seconds or more. While outputting switching solenoid (SM1 or SM2) ON, an open circuit continues for 0.1 second or more. While outputting switching solenoid (SM1 or SM2) OFF, current continues to be applied for 0.1 second or more. Short to GND in the switching solenoid (SM1 or SM2) continues for 0.1 second or more. Switching solenoids SM1 and SM2 are shorted for 0.1 second or more. | Brake actuator assembly SM1 or SM2 circuit |
DTC DETECTION CONDITION CHART
Scheme 4
If a DTC of the motor line is stored, the VSC NO. 1 (fail safe) relay cuts off the power supply to the VSC NO. 2 relay and performs fail safe.
While any of the ABS, TRAC, VSC, or BA is operating, the skid control ECU (housed in the actuator assembly) turns the VSC NO. 2 relay on and activates the pump motor in the brake actuator.
This code may be stored if the motor relay (BM) voltage becomes lower than the DTC detecting condition due to insufficient output from the battery or alternator.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C0273/13 | When any of the following (1 or 2) is detected: All of the following conditions continue for 0.12 seconds or more. The IG1 terminal voltage is between 9.5 and 17.2 V. During initial check and ABS, BA, TRAC, or VSC are operating. Relay contact is open when the relay is ON. All of the following conditions continue for 0.12 seconds. The IG1 terminal voltage is 9.5 V or less. Relay contact remains open when the relay is ON. | ABS NO. 1 fuse VSC NO. 2 relay VSC NO. 2 relay circuit Brake actuator assembly |
| C0274/14 | When the motor relay is OFF, the VSC NO. 2 relay remains closed for 4 seconds or more. | ABS NO. 1 fuse VSC NO. 2 relay VSC NO. 2 relay circuit Brake actuator assembly |
| C1361/91 | Immediately after the engine switch is turned on (IG), the relay contact is closed for 4 seconds when the VSC NO. 1 (fail safe) relay is OFF. | ABS NO. 1 fuse VSC NO. 1 (fail safe) relay VSC NO. 1 (fail safe) relay circuit Brake actuator assembly |
DTC DETECTION CONDITION CHART
Scheme 5
The ABS solenoid relay supplies power to the ABS solenoid and TRAC solenoid.
The solenoid relay is turned on 1.5 seconds after the engine switch is turned on (IG), and is turned off if an open or short in the solenoid is detected by self diagnosis performed when the vehicle starts running.
The ABS solenoid relay is housed in the skid control ECU in the actuator assembly.
HINT
If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU, with the engine switch turned on (IG) and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C0278/11 | When any of the following (1 or 2) is detected: Both of the following conditions continue for 0.2 seconds or more. The IG1 terminal voltage is between 9.5 and 17.2 V. The solenoid relay contact is open when the relay is ON. Both of the following conditions continue for 0.2 seconds or more. IG1 terminal voltage becomes lower than 9.5 V or less when the relay is turned on. The relay contact remains open. | ABS NO. 2 fuse ABS solenoid relay ABS solenoid relay circuit Brake actuator assembly |
| C0279/12 | Immediately after the engine switch is turned on (IG), the solenoid relay contact is closed for 0.2 seconds when the relay is turned off. | Brake actuator assembly |
DTC DETECTION CONDITION CHART
If a malfunction in the engine control system is detected, the operations of VSC and TRAC are prohibited by the fail safe function. When the signals from the engine are input normally, the fail safe is cancelled and the DTC is not stored.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1201/51 | Engine control system malfunction signal continues for 5 seconds. | Engine control system |
DTC DETECTION CONDITION CHART
The circuit is used to send TRAC and VSC control information from the skid control ECU to the ECM, and engine control information from the ECM to the skid control ECU through the CAN communication system.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1203/53 | Engine, drive source and destination variations that are sent from the ECM do not match the ones of the skid control ECU. | ECM |
DTC DETECTION CONDITION CHART
The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system.
The yaw rate sensor has the built in acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2). If there is trouble in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, the DTCs U0123/62 (yaw rate sensor communication trouble) and U0124/95 (acceleration sensor communication trouble) are output.
The DTCs are also output when the calibration has not been completed.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1210/36 | Zero point calibration of yaw rate sensor undone. | Brake actuator assembly (Skid control ECU) Yaw rate and acceleration sensor Zero point calibration undone (Perform zero point calibration and check DTC. If DTC is not output again, the sensor is normal) |
| C1336/39 | When either of the following is detected: The vehicle runs in the normal mode with zero point calibration undone. After the zero point has been obtained, the zero point voltage of the sensor is not between 2.38 and 2.62 V. | Brake actuator assembly (Skid control ECU) Yaw rate and acceleration sensor Zero point calibration undone (Perform zero point calibration and check DTC. If DTC is not output again, the sensor is normal) |
DTC DETECTION CONDITION CHART
The steering angle sensor signal is sent to the skid control ECU via the CAN communication system.
When there is a malfunction in the CAN communication system, it will be detected by the steering angle sensor zero point malfunction diagnostic function.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1231/31 | When ECU IG1 terminal voltage is 9.5 V or more, the steering angle sensor malfunction signal is received. | Steering angle sensor Steering angle sensor circuit Steering angle sensor power supply Brake actuator assembly (Skid control ECU) |
DTC DETECTION CONDITION CHART
Scheme 6
The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system.
The yaw rate sensor has a built in acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).
If there is trouble in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, the DTC U0123/62 (malfunction in CAN communication with the yaw rate sensor) and U0124/95 (malfunction in CAN communication with the acceleration sensor) are output.
These DTCs are also output when calibration has not been completed.
DTCs C0371/71 and C1279/79 can be deleted when the yaw rate and acceleration sensor sends a yaw rate and/or acceleration signal or the Test Mode ends. DTCs C0371/71 and C1279/79 are output only in the Test Mode.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1232/32 | At a vehicle speed of 10 km/h (6 mph) or more, either GL1 or GL2 (input signal) does not change for 30 seconds or more. | Yaw rate and acceleration sensor Yaw rate and acceleration sensor circuit |
| C1234/34 | Sensor malfunction signal is received from the yaw rate sensor. | Yaw rate and acceleration sensor Yaw rate and acceleration sensor circuit |
| C1243/43 | While the vehicle speed changes from 30 km/h (19 mph) to 0 km/h (0 mph), the condition that the values of GL1 and GL2 do not change occurs 16 times or more. | Yaw rate and acceleration sensor Yaw rate and acceleration sensor circuit |
| C1244/44 | When either of the following is detected: A data malfunction signal is received from the acceleration sensor. After the difference between GL1 and GL2 becomes 0.6 G or more with the vehicle stationary, the difference remains 0.4 G or more for 60 seconds or more. | Yaw rate and acceleration sensor Yaw rate and acceleration sensor circuit |
| C1245/45 | At a vehicle speed of 30 km/h (19 mph) or more, the difference between the forward and backward G calculated from the acceleration sensor value and that calculated from the vehicle speed sensor exceeds 0.35 G for 60 seconds or more. | Yaw rate and acceleration sensor Yaw rate and acceleration sensor circuit |
| C1381/97 | At a vehicle speed of more than 3 km/h (2 mph), the acceleration sensor power source malfunction signal is received for 10 seconds or more. | Yaw rate and acceleration sensor Yaw rate and acceleration sensor power source circuit |
| C0371/71 | Detected only during Test Mode. | Yaw rate and acceleration sensor |
| C1279/79 | Detected only during Test Mode. | Yaw rate and acceleration sensor Sensor installation |
DTC DETECTION CONDITION CHART
Scheme 7
The speed sensors detect wheel speed and transmit the signals to the ECU. These signals are used for control of the ABS control system. Each of the front and rear rotors have 48 serrations. When the rotors rotate, the magnetic field generated by the permanent magnet in the speed sensor induces an AC voltage.
Since the frequency of this AC voltage changes in direct proportion to the speed of the rotor, the frequency is used by the ECU to detect the speed of each wheel.
When foreign matter adheres to the speed sensor tip or speed sensor rotor, or the rotor teeth are chipped, these DTCs are output. An abnormal waveform input from the sensor determines these conditions. These DTCs may be detected when a malfunction occurs in the connector terminals or wire harness of the speed sensor circuit.
DTCs C1275/75 to C1278/78 can be deleted when the speed sensor sends a vehicle speed signal or the Test Mode ends. DTCs from C1275/75 to C1278/78 are output only in the Test Mode.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1235/35 C1236/36 C1238/38 C1239/39 | At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signal from the abnormal wheel for 5 seconds or more. | Speed sensor Speed sensor rotor Sensor installation Brake actuator assembly (Skid control ECU) |
| C1275/75 C1276/76 C1277/77 C1278/78 | Detected only during Test Mode. | Speed sensor rotor |
DTC DETECTION CONDITION CHART
HINT
- DTCs C1235/35 and C1275/75 are for the front speed sensor RH.
- DTCs C1236/36 and C1276/76 are for the front speed sensor LH.
- DTCs C1238/38 and C1277/77 are for the rear speed sensor RH.
- DTCs C1239/39 and C1278/78 are for the rear speed sensor LH.
Scheme 8
If a malfunction is detected in the power supply circuit, the skid control ECU (housed in the actuator assembly) stores this DTC and the fail safe function prohibits ABS operation.
This DTC is stored when the IG1 terminal voltage deviates from the DTC detection condition due to a malfunction in the power supply or charging circuit such as the battery or alternator circuit, etc.
The DTC is cancelled when the IG1 terminal voltage returns to normal.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1241/41 | When any of the following is detected: At a vehicle speed of 3 km/h (2 mph) or more, the IG1 terminal voltage is 9.5 V or less for 10 seconds or more. When the solenoid relay remains ON and the IG1 terminal voltage is 9.5 V or less, the relay contact is open for 0.2 seconds or more. While the VSC NO. 1 (fail safe) relay is ON after VSC NO. 2 relay ON, the IG1 terminal voltage is 9.5 V or less and the actuator pump drive motor is OFF for 0.1 second or more. | ECU-IG NO. 2 fuse Battery Charging system Power source circuit Internal power supply circuit of the skid control ECU |
DTC DETECTION CONDITION CHART
Scheme 9
Master cylinder pressure sensor is connected to the skid control ECU in the brake actuator assembly. DTC C1281/81 can be deleted when the master cylinder pressure sensor sends a master cylinder pressure signal or the Test Mode ends. DTC C1281/81 is output only in the Test Mode.
Scheme 10
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1246/46 | When any of the following is detected: At a vehicle speed of 7 km/h (4.3 mph) or more, when the PMC terminal voltage is over 0.86 V, it does not change by 0.005 V or more for 30 seconds. Noise occurs in the PMC terminal 7 times or more within 5 seconds. When the stop light switch is OFF, the PMC terminal voltage is more than 0.86 V or less than 0.3 V for 5 seconds or more. With the IG1 terminal voltage between 9.5 and 17.2 V, the VCM terminal voltage is not between 4.4 and 5.6 V for 1.2 seconds or more. When the VCM terminal voltage is between 4.4 and 5.6 V, the PCM terminal voltage is not between 0.14 and 4.85 V for 1.2 seconds or more. | Master cylinder pressure sensor Master cylinder pressure sensor circuit Stop light switch circuit Brake actuator assembly |
| C1281/81 | Detected only during Test Mode. | Stop light switch Master cylinder pressure sensor |
DTC DETECTION CONDITION CHART
The skid control ECU (housed in the actuator assembly) inputs the stop light switch signal and the condition of brake operation.
The skid control ECU has an open detection circuit, which outputs this DTC when detecting an open in the stop light input line while the stop light switch is OFF.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1249/49 | When IG1 terminal voltage is 9.5 to 17.2 V, an open circuit of the stop light switch continues for 0.3 seconds or more. | STOP fuse Stop light switch Stop light switch circuit Stop light control relay (1) Stop light control relay circuit (1) Brake actuator assembly (Skid control ECU) |
| (1) with dynamic radar cruise control | ||
| (1) | With dynamic radar cruise control |
DTC DETECTION CONDITION CHART
Scheme 11
Scheme 12
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1251/51 | Actuator pump motor does not operate properly. Open in actuator pump motor circuit continues for at least 2 seconds. | Brake actuator assembly (GND circuit) Brake actuator assembly (Motor circuit) |
DTC DETECTION CONDITION CHART
The skid control ECU acquires steering angle sensor zero point every time the engine switch is turned on (IG) and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The ECU also stores the previous zero point.
If front wheel alignment or steering wheel position is adjusted without disconnecting the negative battery terminal, or if yaw rate and acceleration sensor zero point is not acquired after the adjustments have been completed, the skid control ECU detects the difference between the previous zero point and newly acquired zero point and outputs this DTC to indicate a poor adjustment.
Warning of the steering angle sensor zero point malfunction will be cancelled by turning the engine switch off.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1290/66 | The steering angle sensor zero point calibration position vastly differs from the recorded value | Yaw rate and acceleration sensor zero point calibration incomplete Poor adjustment of the centered position of the steering wheel Poor adjustment of front wheel alignment |
DTC DETECTION CONDITION CHART
Upon receiving the dynamic radar cruise control operating signal from the skid control ECU, the relay contact turns on and the stop light comes on.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1380/64 (1) | When either of the following is detected: When the voltage at the IG1 terminal is between 10 to 14 V and the stop light control relay drive output (STPO) is ON, a signal has not been input to the STP terminal for 5 seconds or more. When the voltage at the IG1 terminal is between 10 to 14 V and the stop light control relay drive output (STPO) is OFF, the signal at the STP1 is different from the input signal at the STP2 for 5 seconds or more. | STOP fuse Stop light switch Stop light switch circuit Stop light control relay Stop light control relay circuit Brake actuator assembly (Skid control ECU) |
| (1) with dynamic radar cruise control | ||
| (1) | With dynamic radar cruise control |
DTC DETECTION CONDITION CHART
The skid control ECU receives the signals from the ECM, steering angle sensor, and yaw rate and acceleration sensor via the CAN communication system.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| U0073/94 | When any of the following is detected: With the IG1 terminal voltage 10 V or more, after the output of data from the skid control ECU is completed, the sending continues for 5 seconds or more. With the IG1 terminal voltage 10 V or more, the condition that bus OFF state occurs once or more within 100 ms occurs 10 times in succession. (Sent signals cannot be received.) With the IG1 terminal voltage 10 V or more, a delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor continues for 1 second or more. With the IG1 terminal voltage 10 V or more, the condition that a delay in receiving data from the yaw rate and acceleration sensor and the steering angle sensor occurs more than once within 5 seconds occurs 10 times in succession within 60 seconds. | CAN communication system |
| U0100/65 | When either of the following is detected: With the IG1 terminal voltage 10 V or more and the vehicle speed 15 km/h (9 mph) or more, data cannot be sent to the ECM for 2 seconds or more. The IG1 terminal voltage 10 V or more and the vehicle speed 15 km/h (9 mph) or more for 2 seconds or more. | CAN communication system (Skid control ECU to ECM) |
| U0123/62 | When either of the following is detected: With the IG1 terminal voltage 10 V or more, data from the yaw rate sensor cannot be received for 1 second or more. With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession within 60 seconds. The condition that data from the yaw rate sensor cannot be received occurs once or more within 5 seconds. | CAN communication system (Skid control ECU to yaw rate and acceleration sensor) |
| U0124/95 | When either of the following is detected: With the IG1 terminal voltage 10 V or more, data from the acceleration sensor cannot be received for 1 second or more. With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession within 60 seconds. The condition that data from the acceleration sensor cannot be received occurs once or more within 5 seconds. | CAN communication system (Skid control ECU to yaw rate and acceleration sensor) |
| U0126/63 | When either of the following is detected: With the IG1 terminal voltage 10 V or more, data from the steering angle sensor cannot be received for 1 second or more. With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession within 60 seconds. The condition that data from the steering angle sensor cannot be received occurs once or more within 5 seconds. | CAN communication system (Skid control ECU to steering angle sensor) |
DTC DETECTION CONDITION CHART
Scheme 13
The skid control ECU is connected to the combination meter via CAN communication.
If any of the following is detected, the ABS warning light remains on.
- The skid control ECU connectors are disconnected from the skid control ECU.
- There is a malfunction in the skid control ECU internal circuit.
- There is an open in the harness between the combination meter and the skid control ECU.
HINT
In some cases, the intelligent tester cannot be used when the skid control ECU is abnormal.
Scheme 14
The skid control ECU is connected to the combination meter via CAN communication.
The skid control ECU communicates with the combination meter via CAN communication. If the ECU stores a DTC, the DTC will be displayed on the multi information display in the combination meter.
Scheme 15
The skid control ECU communicates with the combination meter via CAN communication. If the ECU stores a DTC, the DTC will be displayed on the multi information display in the combination meter.
The skid control ECU is connected to the combination meter via CAN communication. If any of the following is detected, the BRAKE warning light remains on
- The skid control ECU connector is disconnected from the skid control ECU.
- The brake fluid level is insufficient.
- The parking brake is applied.
- EBD operation is not possible.
Scheme 16
The skid control ECU is connected to the combination meter via CAN communication.
The skid control ECU is connected to the combination meter via CAN communication.
The SLIP indicator light blinks during VSC and/or TRAC operation.
When the system fails, the SLIP indicator light comes on to warn the driver (See DIAGNOSIS SYSTEM ).
Scheme 17
The skid control ECU is connected to the combination meter via CAN communication.
The SLIP indicator light blinks during VSC and/or TRAC operation.
When the system fails, the SLIP indicator light comes on to warn the driver (See DIAGNOSIS SYSTEM ).
The skid control buzzer sounds while the accumulator pressure is abnormally low or when an abnormality causing low fluid pressure occurs, and then the VSC is activated.
Scheme 18
Connecting terminals TC and CG of the DLC3 causes the ECU to display the DTC by blinking the ABS warning light.
Scheme 19
In the Test Mode (signal check), a malfunction of the speed sensor that cannot be detected when the vehicle is stopped can be detected while driving.
Transition to the sensor check mode can be performed by connecting terminals TS and CG of the DLC3 and turning the engine switch from off to on (IG).
Scheme 20
See also:
• DTC CHECK/CLEAR
• REMOVAL
• REMOVAL
• AIRBAG SYSTEM