DESCRIPTION
These DTCs are stored if the VSC and/or electronically controlled brake system detects a malfunction in the ABS control system.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| 36 | Malfunction in the ABS control system. | ABS control system | |
| 43 | Malfunction in the ABS control system. | ABS control system |
These DTCs are stored if the ABS and/or VSC system detects a malfunction in the electronically controlled brake system.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| 42 | Malfunction in the electronically controlled brake system. | Electronically controlled brake system | |
| 45 | Malfunction in the electronically controlled brake system. | Electronically controlled brake system |
When a fluid level drop in the master cylinder reservoir is detected, the signal is input to the skid control ECU assembly.
If the DTC for the fluid level drop is memorized, the warning will be canceled and the DTC will not be stored when the fluid level returns to normal.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1202/68 | 511 | When the brake fluid level has dropped to the warning level, it is determined that each cylinder reservoir is empty or will soon become empty. | Brake fluid leak Brake fluid level Brake fluid level warning switch (Brake master cylinder reservoir assembly) Brake fluid level warning switch circuit Skid control ECU assembly |
| ↑ | 512 | An open in the switch signal circuit continues for 2 seconds or more. | Brake fluid level warning switch (Brake master cylinder reservoir assembly) Brake fluid level warning switch circuit Skid control ECU assembly |
Scheme 77
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1203/95 | Any of the following is detected: An improper skid control ECU assembly is installed. The skid control assembly is malfunctioning. | Skid control ECU assembly |
The skid control ECU assembly receives signals from the yaw rate 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 are any problems in the bus lines between the yaw rate sensor and the CAN communication system, DTCs U0123/62 (Lost Communication with Yaw Rate Sensor Module) and U0124/95 (Lost Communication with Lateral Acceleration Sensor Module) will be output.
The DTCs will be also output when the calibration has not been completed.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1210/36 | 336 | Yaw rate sensor zero point calibration is unfinished. | Skid control ECU assembly Yaw rate sensor Zero point calibration undone (Perform zero point calibration and check for DTCs. If this DTC is not output again, the sensor is normal) |
| C1336/98 | 318 | Any of the following is detected: Acceleration sensor zero point calibration is unfinished. The vehicle speed is driven in normal mode with zero point calibration unfinished. Zero point calculation is not within specified range (2.38 to 2.62 V) when zero point calibration is finished. | Skid control ECU assembly Acceleration sensor (Yaw rate sensor) Zero point calibration undone (Perform zero point calibration and check for DTCs. If this DTC is not output again, the sensor is normal) |
The skid control ECU assembly inputs steering sensor signals via the CAN communication. When a malfunction occurs in the communication line with the steering sensor, DTC U0126/63 (Lost Communication with Steering Angle Sensor Module) is output.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1231/31 | 341 | Steering sensor stuck malfunction. | Steering sensor Steering sensor circuit Steering sensor power supply |
| ↑ | 343 | Steering sensor malfunction signal is received when data transmission is valid (internal malfunction is detected in sensor self check). | Steering sensor |
Scheme 78
The skid control ECU assembly receives signals from the yaw rate 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 are any problems in the bus lines between the yaw rate sensor and the CAN communication system, DTCs U0123/62 (Lost Communication with Yaw Rate Sensor Module) and U0124/95 (Lost Communication with Lateral Acceleration Sensor Module) are output.
These DTCs are also output when calibration has not been completed.
DTC C1279/79 will be cleared when the yaw rate sensor sends a yaw rate and/or acceleration signal or when Test Mode ends. DTC C1279/79 is output only in Test Mode.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1234/34 | Either of the following is detected: Signal of malfunction that is detected at sensor self-check is received when communication with the sensors is valid. Yaw rate sensor (GL1 or GL2 circuit) open or short. | Yaw rate sensor | |
| ↑ | 333 | Yaw rate sensor circuit 1 malfunction | ↑ |
| ↑ | 334 | Yaw rate sensor circuit 2 malfunction | ↑ |
| ↑ | 335 | Yaw rate sensor zero point malfunction | ↑ |
| ↑ | 337 | The output of two yaw rate sensors is different. | ↑ |
| C1243/43 | 311 | Sensor (GL1) input stuck malfunction. | Acceleration sensor (Yaw rate sensor) |
| ↑ | 312 | Sensor (GL2) input stuck malfunction. | ↑ |
| ↑ | 317 | While the vehicle speed changes from over 30 km/h (18 mph) to 0 km/h (0 mph), the values of GL1 and GL2 do not change 16 times or more. | Acceleration sensor (Yaw rate sensor) Skid control ECU assembly |
| C1244/44 | 314 | Either of the following is detected: A 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 greater than 0.4 G for 60 seconds or more. | Zero point calibration undone Acceleration sensor (Yaw rate sensor) Yaw rate sensor installation Skid control ECU assembly |
| C1245/45 | 313 | 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. | Acceleration sensor (Yaw rate sensor) |
| C1381/97 | 315 | With sensor power source voltage is 9.5 V or more and vehicle speed of more than 3 km/h (2 mph), the acceleration sensor power source malfunction signal is received for 10 seconds or more. | Acceleration sensor (Yaw rate sensor) Acceleration sensor (Yaw rate sensor) power source circuit Skid control ECU assembly |
| C1279/79 | Detected only during Test Mode. | Yaw rate sensor installation Acceleration sensor (Yaw rate sensor) |
Scheme 79
When foreign matter adheres to the speed sensor rotor, these DTCs are stored. The presence of foreign matter can be judged when an abnormal waveform is received from the sensor.
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 will be cleared when the speed sensor sends a wheel speed signal or when Test Mode ends. DTCs from C1275/75 to C1278/78 are output only in Test Mode.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1235/35 | 302 | Either of the following is detected: Continuous noise occurs in speed sensor signals when vehicle speed is 20 km/h (12 mph) or more for 5 seconds or more. At a vehicle speed of 10 km/h (6 mph) or more, condition that noise is input once per rotor rotation continues for 15 seconds or more. | Front speed sensor RH Speed sensor circuit Sensor installation Speed sensor rotor Skid control ECU assembly |
| C1236/36 | 303 | Either of the following is detected: Continuous noise occurs in speed sensor signals when vehicle speed is 20 km/h (12 mph) or more for 5 seconds or more. At a vehicle speed of 10 km/h (6 mph) or more, condition that noise is input once per rotor rotation continues for 15 seconds or more. | Front speed sensor LH Speed sensor circuit Sensor installation Speed sensor rotor Skid control ECU assembly |
| C1238/38 | 304 | Either of the following is detected: Continuous noise occurs in speed sensor signals when vehicle speed is 20 km/h (12 mph) or more for 5 seconds or more. At a vehicle speed of 10 km/h (6 mph) or more, condition that noise is input once per rotor rotation continues for 15 seconds or more. | Rear speed sensor RH Speed sensor circuit Sensor installation Speed sensor rotor Skid control ECU assembly |
| C1239/39 | 305 | Either of the following is detected: Continuous noise occurs in speed sensor signals when vehicle speed is 20 km/h (12 mph) or more for 5 seconds or more. At a vehicle speed of 10 km/h (6 mph) or more, condition that noise is input once per rotor rotation continues for 15 seconds or more. | Rear speed sensor LH Speed sensor circuit Sensor installation Speed sensor rotor Skid control ECU assembly |
| C1275/75 C1276/76 C1277/77 C1278/78 | Detected only during Test Mode. | Speed sensor Speed sensor rotor |
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.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1240/95 | 321 | The yaw rate sensor identification information stored in the skid control ECU assembly is not consistent with the yaw rate sensor identification information sent via CAN communication continuously for 1 second or more. | Yaw rate sensor Skid control ECU assembly |
If a malfunction is detected in the power supply circuit, the skid control ECU assembly power source voltage drops, or there is insufficient voltage to operate either ABS main relay 1 or ABS main relay 2, the skid control ECU assembly will store these codes.
These codes may be also be stored if the auxiliary battery voltage drops below 9.5 V.
HINT
DTC C1256/57 (Accumulator Low Pressure) may also be memorized if there is a drop in power source voltage.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1241/41 | 81 | System main relay 1 is under the following conditions when the power switch is on (READY): With the main relay 1 and the relay contact on, the voltage of relay power supply terminal (BS01) is less than 8.9 V and the actual current, which is supplied by the relay, does not reach the specified value at any of the linear solenoids for 0.03 seconds or more. With the main relay 1 and the relay contact on, the voltage of relay power supply terminal (BS01) is less than 8.9 V and the brake pedal is not depressed for 3 seconds or more. When 0.05 seconds elapsed after main relay 1 is turned on and the relay contact is on, the voltage of relay power supply terminal (BS01) is less than 8.9 V and even one wheel is prohibited from braking while depressing the brake pedal. While the main relay 1 on continues, skid control ECU assembly activation power source input terminal (+BI1 or +BI3) becomes less than 9.1 V and the relay contact off continues for 0.2 seconds or more. With the pressure sensor power supply voltage (VCM) 4.7 V or less or 5.3 V or more, skid control ECU assembly activation power source input terminal (+BI1 or +BI3) in the relevant lines is 9.1 V or less for 0.05 seconds or more. The terminal voltage of sensor output voltage 1 (SKS) or sensor output voltage 2 (SKS2) is less than 0.3 V or 4.9 V or more, or sensor power source voltage (VCSK) is 4.7 V or less or 5.4 V or more for 0.2 seconds. | Auxiliary battery Hybrid control system (Charging circuit) |
| ↑ | 82 | System main relay 2 is under the following conditions when the power switch is on (READY): With the main relay 2 and the relay contact on, the voltage of relay power supply terminal (BS02) is less than 8.9 V and the actual current, which is supplied by the relay, does not reach the specified value at any of the linear solenoids for 0.03 seconds or more. With the main relay 2 and the relay contact on, the voltage of relay power supply terminal (BS02) is less than 8.9 V and the brake pedal is not depressed for 3 seconds or more. When 0.05 seconds elapsed after main relay 2 is turned on and the relay contact is on, the voltage of relay power supply terminal (BS02) is less than 8.9 V and even one wheel is prohibited from braking while depressing the brake pedal. While the main relay 2 on continues, skid control ECU assembly activation power source input terminal (+BI2 or +BI4) becomes less than 9.1 V and the relay contact off continues for 0.2 seconds or more. With the pressure sensor power supply voltage (VCM2) 4.7 V or less or 5.3 V or more, skid control ECU assembly activation power source input terminal (+BI2 or +BI4) in the relevant lines is 9.1 V or less for 0.05 seconds or more. | ↑ |
| ↑ | 83 | With the power switch on (READY), the capacitor mode signal is received from the brake control power supply assembly while the vehicle is driven at low speed for 7 seconds or more, or the vehicle is driven at medium to high speed for 3 seconds or more. | Auxiliary battery Brake control power supply assembly |
| ↑ | 91 92 | Either of the following is detected: The voltage of terminal IG1 or IG2 is 3.5 V or more, and when the vehicle speed is 3 km/h (1.9 mph) or more, the voltage of terminal IG1 is 9.5 V or less for 10 seconds. The voltage of terminal IG1 or IG2 is 3.5 V or more, and when the vehicle speed is 3 km/h (1.9 mph) or more, the voltage of terminal (+BI1 or +BI3) or (+BI2 or +BI4) is 9.1 V or less for 10 seconds. | Auxiliary battery Hybrid control system (Charging circuit) |
| ↑ | 93 94 | Either of the following is detected: The voltage of terminal IG1 is 3.5 V or more, and with the voltage of terminal +BI1 or +BI3 at 9.1 V or less, the front wheel speed sensor RH and rear wheel speed sensor LH power supply voltage decreases for 60 seconds or more. The voltage of terminal IG2 is 3.5 V or more, and with the voltage of terminal +BI2 or +BI4 at 9.1 V or less, the front wheel speed sensor LH and rear wheel speed sensor RH power supply voltage decreases for 60 seconds or more. | ↑ |
| C1242/42 | 87 | The power supply voltage is not applied to the IG1 terminal, power supply voltage is applied to the IG2 terminal, and +BI1 terminal voltage is 9.5 V or more for 4 seconds or more. | Auxiliary battery IG1 power source circuit Hybrid control system (Charging circuit) Skid control ECU assembly |
| ↑ | 88 | The power supply voltage is applied to the IG1 terminal, power supply voltage is not applied to the IG2 terminal, and +BI1 terminal voltage is 9.5 V or more for 4 seconds or more. | Auxiliary battery IG2 power source circuit Hybrid control system (Charging circuit) Skid control ECU assembly |
Scheme 80
Scheme 81
The master cylinder pressure sensor and the wheel cylinder pressure sensor are built into the brake actuator assembly, and measure the master cylinder pressure and the wheel cylinder pressure sent to the skid control ECU assembly.
DTC C1281/81 will be cleared when the master cylinder pressure sensor sends a master cylinder pressure signal or when Test Mode ends. DTC C1281/81 is output only in Test Mode.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1246/46 | 191 | Sensor power source 1 (VCM) voltage is 4.7 V or less or 5.3 V or more for at least 0.05 seconds. | Brake actuator assembly (Master cylinder pressure sensor) Master cylinder pressure sensor circuit Master cylinder pressure sensor power supply Brake actuator assembly Skid control ECU assembly |
| ↑ | 192 | Master cylinder pressure sensor output voltage 1 (PMC1) is less than 0.25 V or 4.53 V or more for at least 0.05 seconds. | Brake actuator assembly (Master cylinder pressure sensor) Master cylinder pressure sensor circuit Brake actuator assembly Skid control ECU assembly |
| ↑ | 194 | Sensor power source 2 (VCM2) voltage is 4.7 V or less or 5.3 V or more for at least 0.05 seconds. | Brake actuator assembly (Master cylinder pressure sensor) Master cylinder pressure sensor circuit Master cylinder pressure sensor power supply Brake actuator assembly Skid control ECU assembly |
| ↑ | 195 | Master cylinder pressure sensor output voltage 2 (PMC2) is less than 0.25 V or 4.53 V or more for at least 0.05 seconds. | Brake actuator assembly (Master cylinder pressure sensor) Master cylinder pressure sensor circuit Brake actuator assembly Skid control ECU assembly |
| ↑ | 197 | Master cylinder pressure sensor output voltage 1 (PMC1) is abnormal. | Brake actuator assembly Skid control ECU assembly |
| ↑ | 198 | Master cylinder pressure sensor output voltage 2 (PMC2) is abnormal. | ↑ |
| ↑ | 199 | Master cylinder pressure sensor output voltage 1 (PMC1) is less than 0.33 V or 0.85 V or more when not braking. | Brake actuator assembly (Master cylinder pressure sensor) Master cylinder pressure sensor circuit Brake actuator assembly Skid control ECU assembly |
| ↑ | 200 | Master cylinder pressure sensor output voltage 2 (PMC2) is less than 0.33 V or 0.85 V or more when not braking. | ↑ |
| ↑ | 201 | Either of the following is detected: PMC1 and PMC2 voltages are different. Master cylinder pressure sensor has a fluctuation of 15 MPa or more continuously for 0.054 seconds within a 0.6 second interval. | ↑ |
| ↑ | 202 | Condition that output voltage of front wheel cylinder pressure sensor RH (PFR) and rear wheel cylinder pressure sensor LH (PRL) is less than 0.25 V or 4.53 V or more continues for 0.05 seconds or more. | Master cylinder pressure sensor power supply Brake actuator assembly Skid control ECU assembly |
| ↑ | 205 | Condition that output voltage of front wheel cylinder pressure sensor LH (PFL) is less than 0.25 V or 4.53 V or more and rear wheel cylinder pressure sensor RH (PRR) is 0.25 V or more or 4.53 V or more continues for 0.05 seconds or more. | ↑ |
| C1364/61 | 221 | Sensor power source 1 (VCM) voltage is 4.7 V or less or 5.3 V or more for at least 0.05 seconds. | Wheel cylinder pressure sensor power supply Brake actuator assembly Skid control ECU assembly |
| ↑ | 222 | Front wheel cylinder pressure sensor RH output voltage (PFR) is 0.25 V or less or 4.53 V or more for at least 0.05 seconds. | Brake actuator assembly (Wheel cylinder pressure sensor) Wheel cylinder pressure sensor circuit Brake actuator assembly Skid control ECU assembly |
| ↑ | 224 | Either of the following is detected: Front wheel cylinder pressure sensor RH output (PFR) is 0.33 V or less or 0.85 V or more for least 3 seconds when not braking. Front wheel cylinder pressure sensor RH output (PFR) is 0.33 V or less for at least 0.1 seconds when braking. | ↑ |
| ↑ | 225 | The front wheel cylinder pressure sensor RH output (PFR) output voltage is stuck at 4.53 V or less. | ↑ |
| ↑ | 227 | Sensor power source 2 (VCM2) voltage is 4.7 V or less or 5.3 V or more for at least 0.05 seconds. | Wheel cylinder pressure sensor power supply Brake actuator assembly Skid control ECU assembly |
| ↑ | 228 | Front wheel cylinder pressure sensor LH output voltage (PFL) is 0.25 V or less or 4.53 V or more for at least 0.05 seconds. | Brake actuator assembly (Wheel cylinder pressure sensor) Wheel cylinder pressure sensor circuit Brake actuator assembly Skid control ECU assembly |
| ↑ | 230 | Either of the following is detected: Front wheel cylinder pressure sensor LH output (PFL) is 0.33 V or less or 0.85 V or more for least 3 seconds when not braking. Front wheel cylinder pressure sensor LH output (PFL) is 0.33 V or less for at least 0.1 seconds when braking. | ↑ |
| ↑ | 231 | The front wheel cylinder pressure sensor LH output (PFL) output voltage is stuck at 4.53 V or less. | ↑ |
| ↑ | 233 | Sensor power source 2 (VCM2) voltage is 4.7 V or less or 5.3 V or more for at least 0.05 seconds. | Wheel cylinder pressure sensor power supply Brake actuator assembly Skid control ECU assembly |
| ↑ | 234 | Rear wheel cylinder pressure sensor RH output voltage (PRR) is 0.25 V or less or 4.53 V or more for at least 0.05 seconds. | Brake actuator assembly (Wheel cylinder pressure sensor) Wheel cylinder pressure sensor circuit Brake actuator assembly Skid control ECU assembly |
| ↑ | 236 | Either of the following is detected: Rear wheel cylinder pressure sensor RH output (PRR) is 0.33 V or less or 0.85 V or more for at least 3 seconds when not braking. Rear wheel cylinder pressure sensor RH output (PRR) is 0.33 V or less for at least 0.1 seconds when braking. | ↑ |
| ↑ | 237 | The rear wheel cylinder pressure sensor RH output (PRR) output voltage is stuck at 4.53 V or less. | ↑ |
| ↑ | 239 | Sensor power source 1 (VCM) voltage is 4.7 V or less or 5.3 V or more for at least 0.05 seconds. | Wheel cylinder pressure sensor power supply Brake actuator assembly Skid control ECU assembly |
| ↑ | 240 | Rear wheel cylinder pressure sensor LH output voltage (PRL) is 0.25 V or less or 4.53 V or more for at least 0.05 seconds. | Brake actuator assembly (Wheel cylinder pressure sensor) Wheel cylinder pressure sensor circuit Brake actuator assembly Skid control ECU assembly |
| ↑ | 242 | Either of the following is detected: Rear wheel cylinder pressure sensor LH output (PRL) is 0.33 V or less or 0.85 V or more for at least 3 seconds when not braking. Rear wheel cylinder pressure sensor LH output (PRL) is 0.33 V or less for at least 0.1 seconds when braking. | ↑ |
| ↑ | 243 | The rear wheel cylinder pressure sensor LH output (PRL) output voltage is stuck at 4.53 V or less. | ↑ |
| C1281/81 | Detected only during Test Mode. | Stop light switch assembly Master cylinder pressure sensor |
Scheme 82
The stroke sensor inputs the pedal stroke into the skid control ECU assembly.
DTC C1346/71 will be cleared when the brake pedal stroke sensor assembly sends a stroke sensor signal or when Test Mode ends. DTC C1346/71 is output only in Test Mode.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1247/47 | 171 | Sensor power source voltage (VCSK) is 4.7 V or less or 5.4 V or more for at least 0.2 seconds. | Brake pedal stroke sensor assembly Brake pedal stroke sensor power supply Skid control ECU assembly |
| ↑ | 172 | Ratio of sensor output voltage 1 (SKS) to sensor power source voltage (VCSK) is less than 6% or 90% or more for at least 0.2 seconds. | Brake pedal stroke sensor assembly Brake pedal stroke sensor circuit |
| ↑ | 173 | Ratio of sensor output voltage 2 (SKS2) to sensor power source voltage (VCSK) is less than 6% or 90% or more for at least 0.2 seconds. | ↑ |
| ↑ | 174 | The stroke value converted from the sensor output 1 (SKS1) fluctuates due to noise. | ↑ |
| ↑ | 175 | The stroke value converted from the sensor output 2 (SKS2) fluctuates due to noise. | ↑ |
| ↑ | 181 | A power source related malfunction other than INF codes 171, 172, 173, 174, 175, 182, or 183 occurs. | ↑ |
| ↑ | 182 | Difference between sensor output voltage 1 (SKS) and sensor output voltage 2 (SKS2) differs. | ↑ |
| ↑ | 183 | Compared to sensor output voltage 1 (SKS) and sensor output voltage 2 (SKS2), the master cylinder pressure sensor output voltage 1 (PMC1) and master cylinder pressure sensor voltage 2 (PMC2) are low. | Brake pedal stroke sensor assembly Brake pedal stroke sensor circuit Brake actuator assembly |
| C1392/48 | Zero point calibration of stroke sensor is unfinished. (When a normal stroke sensor zero point calibration value is not stored.) | Brake pedal stroke sensor zero point calibration incomplete (Initialization and calibration of linear solenoid valve incomplete) | |
| C1346/71 | Detected only during Test Mode. | Brake pedal stroke sensor assembly Brake pedal stroke sensor circuit |
Scheme 83
The skid control ECU assembly inputs the stop light switch signal and detects the brake pedal operation status.
The skid control ECU assembly has an open detection circuit, which outputs this DTC if it detects an open in the stop light input line or ground line of the stop light circuit with the stop light switch off (brake pedal not depressed).
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1249/49 | 520 | When IG2 terminal voltage is 9.5 V or more, an open STP terminal circuit continues for 10 seconds or more. | STP terminal circuit Skid control ECU assembly No. 2 integration relay |
Scheme 84
The skid control ECU assembly detects decreases in the accumulator pressure according to the data from the accumulator pressure sensor, and then starts and stops the pump motor by operating the motor relay.
The skid control ECU assembly usually drives the motor relay 1 for electronically controlled brake system control, and the motor relay 2 for ABS control. If either of them is malfunctioning, the other will substitute.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1252/52 | 130 | Motor relay is on for at least 3 minutes. | Motor circuit or motor monitor circuit ABS MOTOR NO. 1 relay ABS MOTOR NO. 2 relay Accumulator pressure sensor Fluid leak |
| C1253/53 | 134 | MTT input is less than 3.5 V for at least 1 second or more when linear solenoid power source voltage 1 (BS1) is 9.5 V or more, either of +BI1 or +BI2 voltage is 7 V or more, and motor relay 1 is on. | ABS MOTOR NO. 1 relay ABS MOTOR NO. 1 relay circuit Motor circuit or motor monitor circuit |
| ↑ | 138 | MTT input is less than 3.5 V for at least 1 second or more when linear solenoid power source voltage 2 (BS2) is 9.5 V or more, either of +BI1 or +BI2 voltage is 7 V or more, and motor relay 1 is on. | ABS MOTOR NO. 2 relay ABS MOTOR NO. 2 relay circuit Motor circuit or motor monitor circuit |
| ↑ | 140 | MTT input is 3.5 V or more for at least 2 seconds when motor relay 1 and 2 are off. | ABS MOTOR NO. 1 relay circuit ABS MOTOR NO. 2 relay circuit Motor circuit or motor monitor circuit |
Scheme 85
The accumulator pressure sensor is built into the actuator and detects the accumulator pressure.
The skid control ECU assembly turns on the brake warning light / yellow (minor malfunction) and sounds the skid control buzzer if it senses a decrease in the accumulator pressure.
DTC C1256/57 may be output if the accumulator pressure drops due to frequent braking (this is not a malfunction).
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1256/57 | 141 | Either of the following is detected: When inputting the vehicle speed, the brake operation is input with the accumulator pressure low or the accumulator pressure extremely decreased while braking for 0.3 seconds or more. The accumulator pressure has been low since system start and pressure is less than 14.62 MPa for 120 seconds (stores the DTC after the conditions are met, and sounds buzzer). | Accumulator pressure dropped due to frequent brake pedal operation (not a malfunction) Pump motor malfunction Accumulator deterioration Brake fluid leak Accumulator pressure sensor (Brake booster with master cylinder assembly) Supply voltage reduced |
| ↑ | 143 | Any of the following is detected: When inputting the vehicle speed, any of the wheel cylinder pressure sensor values is less than the specified value with the accumulator pressure low for 0.5 seconds or more. The accumulator pressure decreased without increasing the wheel cylinder pressure of each wheel. With the motor relay abnormal or off, the accumulator pressure is less than 14.62 MPa for 0.5 seconds or more. | ↑ |
The skid control ECU assembly communicates with the power management control ECU and controls braking force according to the motor's regenerative force.
The skid control ECU assembly sends enhanced VSC signals to the power management control ECU and inputs operating signals from the power management control ECU.
The skid control ECU assembly uses CAN communication for communication with the power management control ECU. If a communication malfunction is memorized, the skid control ECU assembly prohibits enhanced VSC operation and a part of electronically controlled brake system control by fail-safe function.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1259/58 | Either of the following is detected: When IG2 terminal voltage is 10.5 V or more, the regeneration malfunction signal continues for 0.48 seconds or more. The regeneration malfunction signal is input for at least 0.036 seconds when IG2 terminal voltage is 10.5 V or more for at least 2 seconds and communication with power management control ECU is valid. | Hybrid control system (Regeneration malfunction) | |
| C1310/14 | The hybrid control malfunction signal is received for at least 0.072 seconds from power management control ECU. | Hybrid control system (Brake hold control malfunction) | |
| C1310/51 | The traction control prohibition signal is received for at least 0.072 seconds when IG2 terminal voltage is 10.5 V or more for at least 1.5 seconds and communication with power management control ECU is valid. | Hybrid control system (VSC control malfunction) |
HINT
This DTC will be output from the skid control ECU assembly when the power management control ECU sends a malfunction signal to the skid control ECU assembly.
The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU assembly. These signals are used for ABS control.
DTCs C1271/71 and C1272/72 can be cleared when the speed sensor sends a wheel speed signal or when Test Mode ends. DTCs C1271/71 and C1272/72 are output only in Test Mode.
HINT
The output voltage values shown below are those when the skid control ECU assembly and the speed sensors are connected to the vehicle harness.
Scheme 86
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1464/31 | 251 | At a vehicle speed of 10 km/h (6 mph) or more, an open or short in the sensor signal circuit of the abnormal wheel continues for 1 second or more. | Front speed sensor RH Speed sensor circuit Sensor installation Speed sensor rotor Skid control ECU assembly |
| ↑ | 252 | More than one speed sensor circuit signal is abnormal. | ↑ |
| ↑ | 253 | Speed sensor circuit signal is open for 0.5 seconds or more. | ↑ |
| ↑ | 254 | A momentary interruption of the sensor signal from the speed sensor occurs 255 times or more. | ↑ |
| ↑ | 255 | Frequency of 2.5 kHz or more is input. | Front speed sensor RH Speed sensor circuit Speed sensor rotor Skid control ECU assembly |
| ↑ | 262 | Either of the following is detected: With the voltage of IG1 terminal at 9.5 V or more, the sensor power supply voltage decreases for 0.5 seconds or more. With the voltage of IG1 terminal at 9.5 V or more, the sensor power supply voltage fluctuates for 60 seconds or more. | Speed sensor circuit Skid control ECU assembly |
| C1465/32 | 264 | At a vehicle speed of 10 km/h (6 mph) or more, an open or short in the sensor signal circuit of the abnormal wheel continues for 1 second or more. | Front speed sensor LH Speed sensor circuit Sensor installation Speed sensor rotor Skid control ECU assembly |
| ↑ | 265 | More than one speed sensor circuit signal is abnormal. | ↑ |
| ↑ | 266 | Speed sensor circuit signal is open for 0.5 seconds or more. | ↑ |
| ↑ | 267 | A momentary interruption of the sensor signal from the speed sensor occurs 255 times or more. | ↑ |
| ↑ | 268 | Frequency of 2.5 kHz or more is input. | Front speed sensor LH Speed sensor circuit Speed sensor rotor Skid control ECU assembly |
| ↑ | 275 | Either of the following is detected: With the voltage of IG1 terminal at 9.5 V or more, the sensor power supply voltage decreases for 0.5 seconds or more. With the voltage of IG1 terminal at 9.5 V or more, the sensor power supply voltage fluctuates for 60 seconds or more. | Speed sensor circuit Skid control ECU assembly |
| C1271/71 C1272/72 | Detected only during Test Mode. | Front speed sensor RH/LH Sensor installation Speed sensor rotor |
HINT
- DTCs C1464/31 and C1271/71 are for the front speed sensor RH.
- DTCs C1465/32 and C1272/72 are for the front speed sensor LH.
Scheme 87
The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU assembly. These signals are used for ABS control.
DTCs C1273/73 and C1274/74 can be cleared when the speed sensor sends a wheel speed signal or when Test Mode ends. DTCs C1273/73 and C1274/74 are output only in Test Mode.
HINT
The output voltage values shown below are those when the skid control ECU assembly and the speed sensors are connected to the vehicle harness.
Scheme 88
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1466/33 | 277 | At a vehicle speed of 10 km/h (6 mph) or more, an open or short in the sensor signal circuit of the abnormal wheel continues for 1 second or more. | Rear speed sensor RH Speed sensor circuit Sensor installation Speed sensor rotor Skid control ECU assembly |
| ↑ | 278 | More than one speed sensor circuit signal is abnormal. | ↑ |
| ↑ | 279 | Speed sensor circuit signal is open for 0.5 seconds or more. | ↑ |
| ↑ | 280 | A momentary interruption of the sensor signal from the speed sensor occurs 255 times or more. | ↑ |
| ↑ | 281 | Frequency of 2.5 kHz or more is input. | Rear speed sensor RH Speed sensor circuit Speed sensor rotor Skid control ECU assembly |
| ↑ | 288 | Either of the following is detected: With the voltage of IG1 terminal at 9.5 V or more, the sensor power supply voltage decreases for 0.5 seconds or more. With the voltage of IG1 terminal at 9.5 V or more, the sensor power supply voltage fluctuates for 60 seconds or more. | Speed sensor circuit Skid control ECU assembly |
| C1467/34 | 290 | At a vehicle speed of 10 km/h (6 mph) or more, an open or short in the sensor signal circuit of the abnormal wheel continues for 1 second or more. | Rear speed sensor LH Speed sensor circuit Sensor installation Speed sensor rotor Skid control ECU assembly |
| ↑ | 291 | More than one speed sensor circuit signal is abnormal. | ↑ |
| ↑ | 292 | Speed sensor circuit signal is open for 0.5 seconds or more. | ↑ |
| ↑ | 293 | A momentary interruption of the sensor signal from the speed sensor occurs 255 times or more. | ↑ |
| ↑ | 294 | Frequency of 2.5 kHz or more is input. | Rear speed sensor LH Speed sensor circuit Speed sensor rotor Skid control ECU assembly |
| ↑ | 301 | Either of the following is detected: With the voltage of IG1 terminal at 9.5 V or more, the sensor power supply voltage decreases for 0.5 seconds or more. With the voltage of IG1 terminal at 9.5 V or more, the sensor power supply voltage fluctuates for 60 seconds or more. | Speed sensor circuit Skid control ECU assembly |
| C1273/73 C1274/74 | Detected only during Test Mode. | Rear speed sensor RH/LH Sensor installation Speed sensor rotor |
HINT
- DTCs C1466/33 and C1273/73 are for the rear speed sensor RH.
- DTCs C1467/34 and C1274/74 are for the rear speed sensor LH.
Scheme 89
The skid control ECU acquires steering angle sensor zero point every time the power switch is turned on (READY) 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 the front wheel alignment or the steering wheel position is adjusted without disconnecting the negative battery terminal, or if the yaw rate and acceleration sensor zero point is not acquired after the adjustments have been completed, the skid control ECU assembly detects the difference between the previous zero point and newly acquired zero point and outputs this DTC to indicate a poor adjustment.
The warning of the steering sensor zero point malfunction will be canceled by turning the power switch off.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1290/66 | 351 | The steering sensor zero point calibration position vastly differs from the recorded value. | Yaw rate and acceleration sensor zero point calibration incomplete Poor adjustment of the center position of the steering wheel Poor adjustment of front wheel alignment |
The skid control ECU assembly outputs this DTC if malfunctions are found in the circuit inside the ECU by self diagnosis.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1300 | Malfunction in the skid control ECU assembly. | Skid control ECU assembly |
The ABS main relay supplies power to the changeover solenoid and the linear solenoid.
The ABS main relay remains on for approximately 2 minutes after the power switch is turned off and the input of brake pedal operation signals stops, and supplies power to the system to keep it ready to operate.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1311/11 | 1 | Either of the following is detected: Relay contact is off (BS01 terminal is less than 3.5 V) for at least 0.2 seconds when +BI1 terminal voltage is 7.9 V or more and ABS main relay 1 is on. +BI1 terminal voltage is less than 7.9 V and ABS main relay 1 cannot be on for at least 0.2 seconds when ABS main relay 1 is turned on (BS01 terminal is 3.5 V or more). | ABS main relay 1 circuit Skid control ECU assembly |
| C1312/12 | 3 | Relay contact is on (BS01 terminal is 6.5 V or more) for at least 1 second when ABS main relay 1 is off. | ↑ |
| C1313/13 | 4 | Either of the following is detected: Relay contact is off (BS02 terminal is less than 3.5 V) for at least 0.2 seconds when +BI2 terminal voltage is 7.9 V or more and ABS main relay 2 is on. +BI2 terminal voltage is less than 7.9 V and ABS main relay 2 cannot be on for at least 2 seconds when ABS main relay 2 is turned on (BS02 terminal is 3.5 V or more). | ABS main relay 2 circuit Skid control ECU assembly |
| C1314/14 | 6 | Relay contact is on (BS02 terminal is 6.5 V or more) for at least 1 second when ABS main relay 2 is off. | ↑ |
Each solenoid adjusts pressure which affects each wheel cylinder according to signals from the skid control ECU assembly and controls the vehicle.
The master cut solenoid (SMC1/2) is closed and blocks the master cylinder pressure from the electronically controlled brake system control pressure when the system is normal. The master cut solenoid is open and sends the master cylinder hydraulic pressure to the non-assisted brake wheel cylinders during the fail safe due to a system malfunction.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1315/31 | 61 | Either of the following is detected: SMC1 drive circuit is malfunctioning for 0.05 seconds or more. Short to +B in SMC1. | Brake actuator assembly (SMC1) SMC1 circuit Skid control ECU assembly |
| ↑ | 62 | Current leaks for 0.05 seconds or more when SMC1 is off. | ↑ |
| ↑ | 63 | Open circuit in SMC1 continues for 0.05 seconds or more. | ↑ |
| ↑ | 64 | Overcurrent in SMC1 continues for 0.05 seconds or more. | ↑ |
| C1316/32 | 66 | Either of the following is detected: SMC2 drive circuit is malfunctioning for 0.05 seconds or more. Short to +B in SMC2. | Brake actuator assembly (SMC2) SMC2 circuit Skid control ECU assembly |
| ↑ | 67 | Current leaks for 0.05 seconds or more when SMC2 is off. | ↑ |
| ↑ | 68 | Open circuit in SMC2 continues for 0.05 seconds or more. | ↑ |
| ↑ | 69 | Overcurrent in SMC2 continues for 0.05 seconds or more. | ↑ |
| C1352/21 | 11 | Open circuit in FRA continues for 0.05 seconds or more when FRA is off. | Brake actuator assembly (FRA) FRA circuit Skid control ECU assembly |
| ↑ | 12 | Open circuit in FRA continues for 0.05 seconds or more when FRA is on. | ↑ |
| ↑ | 13 | Short to +B or voltage leak in FRA continues for 0.05 seconds or more. | ↑ |
| ↑ | 14 | Overcurrent in FRA continues for 0.05 seconds or more. | ↑ |
| C1353/23 | 21 | Open circuit in FLA continues for 0.05 seconds or more when FLA is off. | Brake actuator assembly (FLA) FLA circuit Skid control ECU assembly |
| ↑ | 22 | Open circuit in FLA continues for 0.05 seconds or more when FLA is on. | ↑ |
| ↑ | 23 | Short to +B or voltage leak in FLA continues for 0.05 seconds or more. | ↑ |
| ↑ | 24 | Overcurrent in FLA continues for 0.05 seconds or more. | ↑ |
| C1354/25 | 31 | Open circuit in RRA continues for 0.05 seconds or more when RRA is off. | Brake actuator assembly (RRA) RRA circuit Skid control ECU assembly |
| ↑ | 32 | Open circuit in RRA continues for 0.05 seconds or more when RRA is on. | ↑ |
| ↑ | 33 | Short to +B or voltage leak in RRA continues for 0.05 seconds or more. | ↑ |
| ↑ | 34 | Overcurrent in RRA continues for 0.05 seconds or more. | ↑ |
| C1355/27 | 41 | Open circuit in RLA continues for 0.05 seconds or more when RLA is off. | Brake actuator assembly (RLA) RLA circuit Skid control ECU assembly |
| ↑ | 42 | Open circuit in RLA continues for 0.05 seconds or more when RLA is on. | ↑ |
| ↑ | 43 | Short to +B or voltage leak in RLA continues for 0.05 seconds or more. | ↑ |
| ↑ | 44 | Overcurrent in RLA continues for 0.05 seconds or more. | ↑ |
| C1356/22 | 16 | Open circuit in FRR continues for 0.05 seconds or more when FRR is off. | Brake actuator assembly (FRR) FRR circuit Skid control ECU assembly |
| ↑ | 17 | Open circuit in FRR continues for 0.05 seconds or more when FRR is on. | ↑ |
| ↑ | 18 | Short to +B or voltage leak in FRR continues for 0.05 seconds or more. | ↑ |
| ↑ | 19 | Overcurrent in FRR continues for 0.05 seconds or more. | ↑ |
| C1357/24 | 26 | Open circuit in FLR continues for 0.05 seconds or more when FLR is off. | Brake actuator assembly (FLR) FLR circuit Skid control ECU assembly |
| ↑ | 27 | Open circuit in FLR continues for 0.05 seconds or more when FLR is on. | ↑ |
| ↑ | 28 | Short to +B or voltage leak in FLR continues for 0.05 seconds or more. | ↑ |
| ↑ | 29 | Overcurrent in FLR continues for 0.05 seconds or more. | ↑ |
| C1358/26 | 36 | Open circuit in RRR continues for 0.05 seconds or more when RRR is off. | Brake actuator assembly (RRR) RRR circuit Skid control ECU assembly |
| ↑ | 37 | Open circuit in RRR continues for 0.05 seconds or more when RRR is on. | ↑ |
| ↑ | 38 | Short to +B or voltage leak in RRR continues for 0.05 seconds or more. | ↑ |
| ↑ | 39 | Overcurrent in RRR continues for 0.05 seconds or more. | ↑ |
| C1359/28 | 46 | Open circuit in RLR continues for 0.05 seconds or more when RLR is off. | Brake actuator assembly (RLR) RLR circuit Skid control ECU assembly |
| ↑ | 47 | Open circuit in RLR continues for 0.05 seconds or more when RLR is on. | ↑ |
| ↑ | 48 | Short to +B or voltage leak in RLR continues for 0.05 seconds or more. | ↑ |
| ↑ | 49 | Overcurrent in RLR continues for 0.05 seconds or more. | ↑ |
Scheme 90
Scheme 91
The skid control ECU controls braking force according to the hybrid control system regenerative braking force and inputs the hydraulic pressure necessary for operating each wheel cylinder according to the wheel cylinder pressure sensor.
DTCs may be stored if one of the following occurs
- Brake fluid leaks.
- Wheel cylinder vibrates due to uneven wear of a brake rotor.
- Foreign matter enters solenoid valve.
- Line pressure drops during air bleeding.
- Brake pad is replaced.
- Rotor is replaced. HINT: When replacing the brake pad, retracting the brake calipers piston and attaching a new brake pad will greatly increase the clearance between the brake pad and brake disc, which will likely cause these DTCs to be set the next time the brake pedal is depressed. As there is not malfunction, clear the DTCs.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1341/62 | 551 | Decrease in front wheel RH hydraulic pressure control performance. (Pressure increase malfunction) | Fluid leak Brake actuator assembly |
| ↑ | 552 | Decrease in front wheel RH hydraulic pressure control performance. (Pressure decrease malfunction) | ↑ |
| ↑ | 553 | There is a malfunction or leak in the front wheel RH pressure increase control valve. | Fluid leak Disc rotor Brake actuator assembly |
| ↑ | 554 555 | There is a malfunction or leak in the front wheel RH pressure decrease control valve. | ↑ |
| C1342/63 | 561 | Decrease in front wheel LH hydraulic pressure control performance. (Pressure increase malfunction) | Fluid leak Brake actuator assembly |
| ↑ | 562 | Decrease in front wheel LH hydraulic pressure control performance. (Pressure decrease malfunction) | ↑ |
| ↑ | 563 | There is a malfunction or leak in the front wheel LH pressure increase control valve. | Fluid leak Disc rotor Brake actuator assembly |
| ↑ | 564 565 | There is a malfunction or leak in the front wheel LH pressure decrease control valve. | ↑ |
| C1343/64 | 571 | Decrease in rear wheel RH hydraulic pressure control performance. (Pressure increase malfunction) | Fluid leak Brake actuator assembly |
| ↑ | 572 | Decrease in rear wheel RH hydraulic pressure control performance. (Pressure decrease malfunction) | ↑ |
| ↑ | 573 | There is a malfunction or leak in the rear wheel RH pressure increase control valve. | Fluid leak Disc rotor Brake actuator assembly |
| ↑ | 574 575 | There is a malfunction or leak in the rear wheel RH pressure decrease control valve. | ↑ |
| C1344/65 | 581 | Decrease in rear wheel LH hydraulic pressure control performance. (Pressure increase malfunction) | Fluid leak Brake actuator assembly |
| ↑ | 582 | Decrease in rear wheel LH hydraulic pressure control performance. (Pressure decrease malfunction) | ↑ |
| ↑ | 583 | There is a malfunction or leak in the rear wheel LH pressure increase control valve. | Fluid leak Disc rotor Brake actuator assembly |
| ↑ | 584 585 | There is a malfunction or leak in the rear wheel LH pressure decrease control valve. | ↑ |
The skid control ECU assembly stores and corrects the individual differences in the stroke sensor, actuator solenoids, and stroke simulator solenoid. Perform initialization of the linear solenoid valve and calibration if any of these parts is replaced.
The skid control ECU assembly receives shift position P signal from the power management control ECU through the CAN communication system.
The DTCs are cleared when the linear valve offset learning results are normal.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1345/66 | 501 | Value of initialization and calibration of the linear solenoid valve for the FR wheel is not stored. | Initialization and calibration of the linear solenoid valve undone |
| ↑ | 502 | Value of initialization and calibration of the linear solenoid valve for the FL wheel is not stored. | ↑ |
| ↑ | 503 | Value of initialization and calibration of the linear solenoid valve for the RR wheel is not stored. | ↑ |
| ↑ | 504 | Value of initialization and calibration of the linear solenoid valve for the RL wheel is not stored. | ↑ |
| C1368/67 | 505 | Value of initialization and calibration of the linear solenoid valve is not within the brake actuator's standard range. | Initialization and calibration of the linear solenoid valve undone Brake actuator assembly |
The accumulator pressure sensor is built into the brake actuator assembly.
The skid control ECU assembly detects the accumulator pressure from the data sent from the accumulator pressure sensor, and then runs and stops the pump motor by operating the motor relay.
DTCs may be output if the accumulator pressure drops due to frequent braking (this is not a malfunction).
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1365/54 | 211 | Sensor power 1 (VCM) voltage is 4.7 V or less or 5.3 V or more for at least 0.05 seconds. | Brake actuator assembly (Accumulator pressure sensor) Accumulator pressure sensor circuit Accumulator pressure sensor power supply Brake actuator assembly Skid control ECU assembly |
| ↑ | 212 | Accumulator pressure sensor output voltage (PAC1) is less than 0.25 V or 4.53 V or more for at least 0.05 seconds. | ↑ |
| ↑ | 214 | While the motor is off, the total of the wheel cylinder pressure sensor values of all 4 wheels increases but the accumulator pressure changes little for 0.5 seconds or more. | ↑ |
| ↑ | 215 | Accumulator pressure sensor output voltage (PAC1) is stuck at 4.53 V or less. | ↑ |
The brake control power supply assembly (capacitor) is used as auxiliary power for brake control when the auxiliary battery voltage is low.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1377/43 | 101 | Either of the following is detected: IG1 terminal voltage is 9.5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more. Brake control power supply assembly is deteriorated (replacement necessary). | Brake control power supply assembly |
| ↑ | 102 | Either of the following is detected: IG1 terminal voltage is 9.5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more. Self discharge (current leak) is excessive (internal malfunction). | ↑ |
| ↑ | 103 | Either of the following is detected: IG1 terminal voltage is 9.5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more. Overvoltage (16.4 V or more) continues to be applied from the auxiliary battery to the capacitor voltage input (+BC) for 10 seconds or more. | Apply high voltage |
| ↑ | 105 | Either of the following is detected: IG1 terminal voltage is 9.5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more. Circuit inside the power back up unit (charge) is malfunctioning. | Brake control power supply assembly |
| ↑ | 106 | Either of the following is detected: IG1 terminal voltage is 9.5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more. Circuit inside the power back up unit (back up output circuit) is malfunctioning. | ↑ |
| ↑ | 108 | Either of the following is detected: IG1 terminal voltage is 9.5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more. Circuit inside the power back up unit (voltage monitor circuit) is malfunctioning. | ↑ |
| ↑ | 109 | Either of the following is detected: IG1 terminal voltage is 9.5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more. Open circuit between auxiliary battery (12 V) and capacitor power input (+BC terminal). | CAPACITOR (HV) fuse Brake control power supply circuit |
| ↑ | 110 | Either of the following is detected: IG1 terminal voltage is 9.5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more. Open or short circuit between auxiliary battery (12 V) and capacitor output 1 (OUT1). Open or short circuit between auxiliary battery (12 V) and capacitor output 2 (OUT2). | Brake control power supply circuit |
Scheme 92
The brake control power supply assembly (capacitor) provides auxiliary power for brake control when the auxiliary battery (12 V) voltage drops.
The FAIL and ENA lines are placed between the skid control ECU assembly and the brake control power supply assembly.
Signals indicating that the brake control power supply assembly is in auxiliary mode are sent to the skid control ECU through the FAIL line.
Charge permit prohibition signals are sent to the brake control power supply assembly through the ENA line.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1378/44 | 112 | Any of the following is detected: Open or short in FAIL line. Malfunction inside the power back up unit. IG1 terminal voltage is 9.5 V or more, and condition that capacitor communication is malfunctioning continues for 12 seconds or more. | Brake control power supply assembly Brake control power supply circuit |
Upon receiving the brake hold system or dynamic radar cruise control system operating signal from the skid control ECU assembly, the relay contact turns on and the stop light comes on.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1380/64 | 391 | When the voltage at the +BI1 and +BI2 terminal is 8.9 V or higher and the stop light drive output (STPO) is ON, STP2 OFF condition continues for 2 seconds or more. | No. 2 integration relay No. 2 integration relay circuit Skid control ECU assembly |
| ↑ | 392 | When the voltage at the +BI1 and +BI2 terminal is 8.9 V or higher and the stop light drive output (STPO) is OFF, both STP OFF and STP2 ON conditions continue for 2 seconds or more. | ↑ |
Scheme 93
The DTC is stored if an internal or external brake fluid leak is detected due to improper sealing in the brake actuator assembly. Internal leakage is suspected if the pump motor operates frequently without braking.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1391/69 | 591 | Either of the following is detected: Before braking and when the pump motor is running, the accumulator pressure sensor input does not rise. Before braking and when the pump motor is not running, the accumulator pressure sensor input continues to fall at a greater rate than the standard value. | Brake fluid leak Brake actuator assembly Skid control ECU assembly |
The skid control ECU assembly is connected to the parking brake ECU assembly via CAN communication. If an electric parking brake system malfunction occurs, this code is output.
| DTC Code | Information Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C13AF/11 | 420 | Electric parking brake system malfunction signal continues for 1.5 seconds. | Parking brake ECU assembly |
The skid control ECU assembly receives signals from the power management control ECU via the CAN communication system.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1438/59 | 154 | When IG2 terminal is 9.5 V or more, the signal that indicates the brake data cannot be received from the power management control ECU is received for 2 seconds or more. | CAN communication system (Skid control ECU assembly to power management control ECU) Skid control ECU assembly |
| ↑ | 157 | When IG2 terminal voltage is 9.5 V or more, the signal that indicates the brake date cannot be received from the power management control ECU once or more within 5 seconds occurs 10 times in succession. | ↑ |
The skid control ECU assembly acquires the steering angle sensor zero point every time the power 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 previous zero points.
Warning of the steering angle sensor zero point malfunction will be canceled by turning the power switch off.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1439/66 | 352 | After the steering sensor zero point calibration is cleared due to, for example, fluctuations in the power source, the steering sensor zero point calibration cannot be obtained for 60 seconds of continuous driving. | Steering sensor Yaw rate sensor Skid control ECU assembly |
| C1445/66 | 353 | Steering sensor zero point calibration cannot be obtained when the vehicle is driven without a record of steering sensor zero point calibration at a speed of 36 km/h (22 mph) or more for 30 seconds or more without the brake pedal being depressed. | Steering sensor Yaw rate sensor Skid control ECU assembly |
If the skid control ECU assembly determines that the vehicle is being driven at a steep bank angle, the skid control ECU assembly stores DTC C1440/98 while VSC operation is temporarily disabled.
It is not a malfunction if the system and sensor circuits are normal and if the normal VSC operation resumes.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1440/98 | 630 | Driving at a steep bank angle. | Yaw rate sensor |
The skid control ECU assembly receives signals from the yaw rate sensor via the CAN communication system.
The yaw rate sensor has a built-in acceleration sensor and detects the vehicle condition.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1442/44 | 322 | With terminal IG1 voltage between 9.5 and 17.4 V, an invalid data signal is received from the acceleration sensor for 10 seconds or more. | Acceleration sensor (Yaw rate sensor) |
| C1443/34 | 340 | With terminal IG1 voltage between 9.5 and 17.4 V, an invalid data signal is received from the yaw rate sensor for 10 seconds or more. | Yaw rate sensor |
The skid control ECU assembly receives the signals from the power management control ECU, steering angle sensor, yaw rate sensor, and parking brake ECU assembly via the CAN communication system.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0073/94 | 400 401 | Either of the following is detected: With IG1 terminal voltage 10 V or more, communication with yaw rate sensor does not occur for 1 second or more. (Yaw rate sensor response malfunction) With IG1 terminal voltage 10 V or more, communication with acceleration sensor does not occur for 1 second or more. (Acceleration sensor response malfunction) | CAN communication system Yaw rate sensor Skid control ECU assembly |
| ↑ | 402 | With IG1 terminal voltage 10 V or more, communication with steering angle sensor does not occur for 1 second or more. (Steering angle sensor response malfunction) | CAN communication system Steering sensor Skid control ECU assembly |
| ↑ | 406 411 | CAN communication line (sub bus 15) has open or short, and cannot perform communication. | CAN communication system Skid control ECU assembly |
| ↑ | 407 412 | CAN communication line (CAN No. 1 bus) has open or short, and cannot perform communication. | CAN communication system Skid control ECU assembly |
| U0123/62 | 338 | With the IG1 terminal voltage 10 V or more, data from the yaw rate sensor cannot be received for 1 second or more. | CAN communication system Yaw rate sensor Skid control ECU assembly |
| ↑ | 339 | With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession: Data from the yaw rate sensor cannot be received once or more within 5 seconds. | ↑ |
| U0124/95 | 319 | With the IG1 terminal voltage 10 V or more, data from the acceleration sensor cannot be received for 1 second or more. | CAN communication system Acceleration sensor (yaw rate sensor) Skid control ECU assembly |
| ↑ | 320 | With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession: Data from the acceleration sensor cannot be received once or more within 5 seconds. | ↑ |
| U0126/63 | 350 | With the IG1 terminal voltage 10 V or more, data from the steering angle sensor cannot be received for 1 second or more. | CAN communication system Steering sensor Skid control ECU assembly |
| ↑ | 601 | With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession: Data from the steering angle sensor cannot be received once or more within 5 seconds. | ↑ |
| U0128/13 | 425 | With terminal IG1 voltage at 10 V or more, data cannot be received from the electric parking brake ECU for 1 second. | CAN communication system Parking brake ECU assembly Skid control ECU assembly |
| U0293/59 | 152 | With the IG2 terminal voltage 9.5 V or more, data from the power management control ECU cannot be received for 2 seconds or more. | CAN communication system Power management control ECU Skid control ECU assembly |
| ↑ | 153 | With the IG2 terminal voltage 9.5 V or more, data from the power management control ECU cannot be received once or more within 5 seconds 10 times in succession. | ↑ |
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
If any of the following is detected, the ABS warning light remains on
- The skid control ECU assembly connectors are disconnected from the skid control ECU assembly.
- There is a malfunction in the skid control ECU assembly internal circuit.
- There is an open in the harness between the combination meter assembly and the skid control ECU assembly.
- The ABS control system is defective.
HINT
In some cases, the Techstream cannot be used when the skid control ECU assembly is malfunctioning.
Scheme 94
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
If any of the following is detected, the brake warning light / red (malfunction) remains on
- The skid control ECU assembly connector is disconnected from the skid control ECU assembly.
- The brake fluid level is insufficient.
- EBD operation has been disabled.
Scheme 95
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
Pressing the VSC OFF switch (integration control and panel assembly) turns off traction control and pressing and holding this switch turns off traction and VSC controls. If traction control turns off, the TRAC OFF message is displayed on the multi-information display.
Scheme 96
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
If the skid control ECU assembly stores a DTC, the brake warning light / yellow (minor malfunction) comes on in the combination meter assembly.
Scheme 97
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
- When the brake hold switch is turned ON while the power switch is on (IG), if the brake hold operation is possible, the brake hold standby indicator light illuminates in green.
Scheme 98
When the power switch is on (IG) with the brake hold switch ON, the brake hold operated indicator light illuminates in amber while the brake hold is in operation.
When the brake hold system is malfunctioning and the brake hold switch is pressed, the brake hold operated indicator light blinks in amber.
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
Pressing the VSC OFF switch (integration control and panel assembly) turns off traction control and pressing and holding this switch turns off traction and VSC controls. If VSC control is turned off, the VSC OFF indicator light will come on.
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
If the skid control ECU assembly stores a DTC, the slip indicator light comes on in the combination meter assembly.
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. Refer to DIAGNOSIS SYSTEM [03/2012 - ] .
The skid control ECU assembly is connected to the combination meter assembly via CAN communication.
The skid control buzzer assembly sounds intermittently to warn the driver when the accumulator pressure is abnormally low.
Scheme 99
Connecting terminals TC and CG of the DLC3 causes the ECU to display the DTC by blinking the ABS warning light, brake warning light / yellow (minor malfunction), slip indicator light and/or brake hold standby indicator light.
Scheme 100
HINT
When the warning lights continue to blink, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in one or more ECUs is suspected.
Sensor check mode can be entered by connecting terminals TS and CG of the DLC3 and turning the power switch from off to on (IG).
Scheme 101
See also:
• DIAGNOSIS SYSTEM [03/2012 - ]
• ADJUSTMENT [03/2012 - ]