| TIBURON(GK) >2004 > G 2.7 DOHC > Brake System > ABS(Anti-Lock Brake System)>Troubleshooting |

TROUBLESHOOTING
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
NOTES WITH REGARD TO DIAGNOSIS
Phenomenon | Explanation
System check sound | When starting the engine, a thudding sound can sometimes be heard coming from inside the engine compartment. This is because the system operation checkis being performed.
ABS operation sound |
1. | Sound of the motor inside the ABS hydraulic unit operation (whine).
2. | Sound is generated along with vibration of the brake pedal (scraping).
3. | When ABS operates, sound is generated from the vehicle chassis due torepeated brake application and release (Thump : suspension; squeak: tires)
ABS operation (Longbraking distance) | For road surfaces such as snow-covered and gravel roads, the braking distance for vehicles with ABS can sometimes be longer than that for other vehicles. Accordingly, advisethe customer to drive safely on such roads by lowering the vehicle speed.
Pedal kick back | Pedal kick back is normal operation.
Diagnosis detection conditions can vary depending on the diagnosis code. When checking the trouble symptom after the diagnosis code has been erased,ensure that the requirements listed in "Comment" are met.
ABS CHECK SHEET TROUBLE SYMPTOMS TABLE
Symptom | Suspect Area | See page
Communication with Hi-scan (pro) is not possible. (Communication with any system is not possible) |
1. | Power source circuit
2. | Diagnosis line
| BR - 63
Communication with Hi-scan (pro) is not possible. (Communication with ABS only is not possible) |
1. | Power source circuit
2. | Diagnosis line
3. | HECU
| BR - 63
When ignition key is turned ON (engine OFF), the ABS warning lamp does not light up. |
1. | ABS warning lamp circuit
2. | HECU
| BR - 64
Even after the engine is started, the ABS warning lamp remains ON. |
1. | ABS warning lamp circuit
2. | HECU
| BR - 65
ABS does not operate. | Only when 1. -4. are all normal and the problem is still occurring, replace the HECU.
1. | Check the DTC reconfirming that the normal code is output.
2. | Power source circuit.
3. | Wheel speed sensor circuit.
4. | Check the hydraulic circuit for leakage.
| BR - 66
During ABS operation, the brake pedal may vibrate or may not be able to be depressed. Such phenomena are due to intermittent changes in hydraulic pressure inside the brake line to prevent the wheels from locking and is not an abnormality.
DIAGNOSTIC TROUBLE CODE CHART
DTC No. | Detection Item | MIL* | Memory | See page
C1101 | Battery voltage over volt: 18V or more | ○ | ○ | BR - 70
C1102 | Battery voltage low volt: 9.5V or less | ○ | ○ | BR - 70
C1200 | FL wheel sensor: open or short to ground | ○ | ○ | BR - 67
C1201 | - Range/Performance: speed jump or damaged exciter | ○ | ○ | BR - 68
C1202 | - No signal: air-gap error or wrong excite | ○ | ○ | BR - 69
C1203 | FR wheel sensor: open or short to ground | ○ | ○ | BR - 67
C1204 | - Range/Performance: speed jump or damaged exciter | ○ | ○ | BR - 68
C1205 | - No signal excite: air-gap error or wrong excite | ○ | ○ | BR - 69
C1206 | RL wheel sensor: open or short to ground | ○ | ○ | BR - 67
C1207 | - Range/Performance: speed jump or damaged exciter | ○ | ○ | BR - 68
C1208 | - No signal excite: air-gap error or wrong excite | ○ | ○ | BR - 69
C1209 | RR wheel sensor: open or short to ground | ○ | ○ | BR - 67
C1210 | - Range/Performance: speed jump or damaged exciter | ○ | ○ | BR - 68
C1211 | No signal: air-gap error or wrong excite | ○ | ○ | BR - 69
C1604 | ECU hardware: ECU internal or valve failure | ○ | ○ | BR - 71
C2112 | Valve relay: valve relay or fuse failure | ○ | ○ | BR - 71
C2402 | Motor-Electrical: open or short to battery, motor relay, fuse or motor lock fail | ○ | ○ | BR - 72
C1503 | TCS switch failure | × | ○ |
C1605 | CAN Hardware failure | Δ | ○ | BR - 72
C1610 | CAN Bus off failure | Δ | ○ | BR - 72
C1611 | EMS Time-out failure | Δ | ○ | BR - 72
C1612 | TCM Time-out failure | Δ | ○ | BR - 72
C1613 | TCM Un-matching failure | Δ | ○ | BR - 72
C2227 | Brake disc overheat | Δ | ○ |
*MIL : Malfunction Indication Lamp ○ : ABS warning lamp Δ : TCS warning lamp
FAILSAFE SPECIFICATION DETECT MODE THE ABILITY OF DETECTING A FAILURE THE MANAGEMENT OF FAILURE DETECTION
1. | System down. Both the ABS (TCS) and the EBD function are inhibited and the ABS (TCS) and the EBD warning lamps are activated. If this happens, the valve relay and all solenoids are prevented from being switched on.
2. | Only the ABS (TCS) function is inhibited. The ABS (TCS) warning lamp is activated and the EBD warning lamp is not activated.
3. | Sensor failure outside the ABS control cycle.
(1) | Only one sensor fails: take the same action as management 2.
(2) | More than two sensors fail: take the same action as management 1.
4. | Sensor failure inside the ABS control cycle.
(1) | One front sensor fails: inhibit the ABS control of the failed-wheel and maintain ABS control of the normal wheels. After the controller completes the ABS control, take the same action as in management 2.
(2) | One rear sensor fails: inhibit ABS control of both front wheels and the pressure of both rear wheels is decreased. After the controller completes the ABS control, take the same action as in management 2.
(3) | More than two sensor fail: take the same action as in management 1.
5. | Low operating voltage
(1) | Outside the ABS control cycle: inhibit the ABS (TCS) control of front wheels and allow ABS control of rear wheels, deactivating the motor. The ABS (TCS) warning lamp is directly switched on. When the voltage recovers to the normal operating range, enable the ABS function and the ABS (TCS) warning lamp is switched off and erases the error code of low voltage.
(2) | Inside the ABS control cycle: inhibit the ABS control of the front wheels and allow the the ABS control of rear wheels, deactivating the motor. The ABS (TCS) warning lamp is directly switched on and remains on. The error code is always stored.
6. | Motor error during the ABS control cycle. Inhibit the ABS control of front wheels, allow ABS control of the rear wheels and ABS (TCS) warning lamp is switched ON at the end of ABS control.
7. | TCS failure Inhibit the TCS control and allow the ABS/EBD control. Meanwhile, stop checking the TCS switch failure under the TCS control.
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS Inspection Procedure 1
Communication with Hi-Scan (Pro) is not possible. (Communication with any systems is not possible.) | Probable cause
Possible defect in the power supply system (including ground) for the diagnosis line. |
• | Faulty power source circuit
• | Faulty diagnosis line
Inspection Procedure 2
Communication with Hi-Scan (Pro) is not possible. (Communication with ABS only is not possible.) | Probable cause
When communication with Hi-Scan (Pro) is not possible, the cause may be probably an open circuit in the HECU power circuit or an open circuit in the diagnosis output circuit. |
• | Faulty power source circuit
• | Faulty diagnosis line
• | Faulty HECU
Inspection Procedure 3
When ignition key is turned "ON" (engine OFF), the ABS warning lamp does not illuminate | Probable cause
When current flows in the HECU, the ABS relay turns from on to off as the initial check. The ABS warning lamp will illuminate when the ABS relay is off even if there is a problem with the circuit between the ABS warning lamp and the HECU. Therefore, if the lamp does not illuminate, the cause may be an open circuit in the lamp power supply circuit, a blown bulb, an open circuit in both the circuits between the ABS warning lamp and the HECU, and in the circuit between the ABS warning lamp and the ABS relay. |
• | Blown fuse
• | Burnt out ABS warning lamp bulb
• | Faulty ABS warning lamp circuit
• | Faulty HECU
Inspection Procedure 4
Even after the engine is started, the ABS warning lamp remains illuminated | Probable cause
A possible short-circuit in the ABS warning lamp illumination circuit |
• | Faulty combination meter
• | Faulty ABS warning lamp circuit
• | Faulty HECU
This trouble symptom is limited to cases where communication with the Hi-Scan (Pro) is possible (HECU power supply is normal) and DTC is normal.
Inspection Procedure 5
ABS does not operate | Probable cause
Brake operation varies depending on driving conditions and road surface conditions, so diagnosis can be difficult. However, if a normal DTC is displayed, carry out the following inspection. |
• | Improper installation of wheel speed sensor
• | Incorrect sensor harness contact
• | Foreign material on wheel speed sensor
• | Faulty wheel speed sensor
• | Faulty rotor
• | Faulty wheel bearing
• | Faulty HECU
• | Faulty power source circuit
INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODES
DTC No. C1200, C1203, C1206, C1209 Wheel speed sensor open or short to GND circuit | Probable cause
The HECU determines that an open or short circuit has occured in more than one wire of a wheel speed sensor. |
• | Faulty wheel speed sensor
• | Faulty wiring harness or connector
• | Faulty HECU
DTC No. C1201, C1204, C1207, C1210 (Speed jump or wrong exciter) | Probable cause
Abnormal output signal from a wheel speed sensor other than an open or short circuit. |
• | Improper installation of wheel speed sensor
• | Faulty wheel speed sensor
• | Faulty rotor
• | Faulty wheel bearing
• | Faulty wiring harness or connector
• | Faulty HECU
DTC No. C1202, C1205, C1208, C1211 (Large air gap) | Probable cause
No wheel speed sensor output signal. |
• | Faulty wheel speed sensor
• | Improper installation of wheel speed sensor
• | Faulty rotor (excitor)
• | Faulty wiring harness or connector
• | Faulty HECU
DTC No. C1101, C1102 Voltage out of range (Low and over voltage) | Probable cause
The voltage of the HECU power supply drops lower than or rises higher than the specified value. If the voltage returns to the specified value, this code is no longer output. |
• | Faulty wiring harness or connector
• | Faulty HECU
If battery voltage drops or rises during inspection, this code will be output as well. If the voltage returns to thestandard value, the code is no longer output. Before carrying out the following inspection, check the battery level, and refill if necessary.
DTC No. C1604 HECU Hardware (EEPROM and ECU failure) | Probable cause
The HECU always monitors the solenoid valve drive circuit. It determines that there is an open or short-circuit in the solenoid coil or in a harness even if no current flows in the solenoid or through the HECU. |
• | Faulty wiring harness
• | Faulty HECU
DTC No. C2112 Valve relay (Including fuse failure) | Probable cause
When the ignition switch is turned ON, the HECU switches the valve relay on and off during its initial check. During this time, voltage sent to the valve relay is compared to the voltage in the valve power monitor line. If no current is detected in the valve power monitor line, the HECU determines that there is an open circuit and DTC C2112 is recorded. |
• | Faulty wiring harness or connector
• | Faulty HECU
DTC No. C1605 CAN hardware error | Probable cause
Replace the HECU. |
• | Interference by means of electronic wave
• | Mismatching of the calculation between main and sub processor
• | Defects of the valve coil and valve coil operating circuit element
DTC No. C1611 CAN timeout EMS, C1612 CAN timeout TCU, C1613 CAN wrong matched transmission | Probable cause
Inspect the EMS or TCU according to the instructions of Engine or T/M group. |
• | No message from EMS or TCU for 500ms
• | Message from A/T or M/T signal mismatch the message from ECM or TCU
DTC No. C1610 bus off error | Probable cause
Check CAN bus wiring. Check E37, C33, C133-4 or M42 connectors |
• | CAN bus cable open, or short to ground or battery
DTC No. C2402 motor pump failure (Motor relay, motor) | Probable cause
When the motor power line is normal but no signal is in detected in the motor monitor line. |
• | Faulty wiring harness
• | Faulty HECU
Powering the motor with the Hi-Scan (Pro) will discharge the battery. Start and run the engine for a while after testingis complete.
INSPECTION CHART FOR DIAGNOSTIC TROUBLE CODES
DTC | Trouble Location | Remarks
C1101 | Battery voltage over volt | : 18V or more |
C1102 | Battery voltage low volt | : 9.5V or less |
C1200 | FL wheel sensor | : open or short to ground |
C1201 | - Range/Performance | : speed jump or damaged exciter |
C1202 | - No signal | : air-gap error or wrong excite |
C1203 | FR wheel sensor | : open or short to ground |
C1204 | - Range/Performance | : speed jump or damaged exciter |
C1205 | - No signal excite | : air-gap error or wrong excite |
C1206 | RL wheel sensor | : open or short to ground |
C1207 | - Range/Performance | : speed jump or damaged exciter |
C1208 | - No signal excite | : air-gap error or wrong excite |
C1209 | RR wheel sensor | : open or short to ground |
C1210 | - Range/Performance | : speed jump or damaged exciter |
C1211 | - No signal | : air-gap error or wrong excite |
C1604 | ECU hardware | : ECU internal or valve failure |
C2112 | Valve relay | : valve relay or fuse failure |
C2402 | Motor-Electrical | : open or short to battery, motor relay, fuse or motor lock fail |
C2227 | Brake disc overheat | Only TCS
C1503 | TCS switch failure | With TCS switch
C1610 | CAN bus off failure | Only TCS
C1611 | EMS time-out failure | Only TCS
C1612 | TCU time-out failure | Only TCS
C1613 | TCU un-matching failure | Only TCS
C1605 | CAN hardware failure | Only TCS
FAILSAFE SPECIFICATION
DETECT MODE THE ABILITY OF DETECTING A FAILURE THE MANAGEMENT OF FAILURE DETECTION
1. | System down. Both the ABS (TCS) and the EBD function are inhibited and the ABS (TCS) and the EBD warning lamps are activated. If this happens, the valve relay and all solenoids are prevented from being switched on.
2. | Only the ABS (TCS) function is inhibited. The ABS (TCS) warning lamp is activated and the EBD warning lamp is not activated.
3. | Sensor failure outside the ABS control cycle.
(1) | Only one sensor fails : take the same action as management 2.
(2) | More than two sensors fail : take the same action as management 1.
4. | Sensor failure inside the ABS control cycle.
(1) | One front sensor fails : inhibit the ABS control of the failed-wheel and maintain ABS control of the normal wheels. After the controller completes the ABS control, take the same action as in management 2.
(2) | One rear sensor fails : inhibit ABS control of both front wheels and the pressure of both rear wheels is decreased. After the controller completes the ABS control, take the same action as in management 2.
(3) | More than two sensor fail : take the same action as in management 1.
5. | Low operating voltage
(1) | Outside the ABS control cycle : inhibit the ABS (TCS) control of front wheels and allow ABS control of rear wheels, deactivating the motor. The ABS (TCS) warning lamp is directly switched on. When the voltage recovers to the normal operating range, enable the ABS function and the ABS (TCS) warning lamp is switched off and erases theerror code of low voltage.
(2) | Inside the ABS control cycle : inhibit the ABS control of the front wheels and allow the the ABS control of rear wheels, deactivating the motor. The ABS (TCS) warning lamp is directly switched on and remains on. The error code is always stored.
6. | Motor error during the ABS control cycle. Inhibit the ABS control of front wheels, allow ABS control of the rear wheels and ABS (TCS) warning lampis switched ON at the end of ABS control.
7. | TCS failure Inhibit the TCS control and allow the ABS/EBD control. Meanwhile, stop checking the TCS switch failure under the TCS control.
INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODES
DTC No. C1200, C1203, C1206, C1209 Wheel speed sensor open or short to GND circuit | Probable cause
The HECU determines that an open or short circuit has occured in more than one wire of a wheel speed sensor. |
• | Malfunction of wheel speed sensor
• | Malfunction of wiring harness or connector
• | Malfunction of HECU
DTC No. C1201, C1204, C1207, C1210 (Speed jump or wrong exciter) | Probable cause
Abnormal output signal from a wheel speed sensor other than an open or short circuit. |
• | Improper installation of wheel speed sensor
• | Malfunction of wheel speed sensor
• | Malfunction of rotor
• | Malfunction of wheel bearing
• | Malfunction of wiring harness or connector
• | Malfunction of HECU
DTC No. C1202, C1205, C1208, C1211 (Large air gap) | Probable cause
No wheel speed sensor output signal. |
• | Malfunction of wheel speed sensor
• | Improper installation of wheel speed sensor
• | Malfunction of rotor (excitor)
• | Malfunction of wiring harness or connector
• | Malfunction of HECU
DTC No. C1101, C1102 Voltage out of range (Low and over voltage) | Probable cause
The voltage of the HECU power supply drops lower than or rises higher than the specified value. If the voltagereturns to the specified value, this code is no longer output. |
• | Malfunction of wiring harness or connector
• | Malfunction of HECU.
If battery voltage drops or rises during inspection, this code will be output as well. If the voltage returns to the standard value, the code is no longer output. Before carrying out the followinginspection, check the battery level, and refill if necessary.
DTC No. C1604 HECU Hardware (EEPROM and ECU failure) | Probable cause
The HECU always monitors the solenoid valve drive circuit. It determines that there is an open or short-circuit in the solenoid coil or in a harness even if no current flows in the solenoidor through the HECU. |
• | Malfunction of wiring harness
• | Malfunction of HECU
DTC No. C2112 Valve relay (Including fuse failure) | Probable cause
When the ignition switch is turned ON, the HECU switches the valve relay on and off during its initial check. During this time, voltage sent to the valve relay is compared to the voltage in the valve power monitor line. If no current is detected in the valve power monitor line, the HECU determines that there is an open circuit and DTC C2112is recorded. |
• | Malfunction of wiring harness or connector
• | Malfunction of HECU
DTC No. C1605 CAN hardware error | Probable cause
Replace the HECU. |
• | Interference by means of electronic wave
• | Mismatching of the calculation between main and sub processor
• | Defects of the valve coil and valve coil operating circuit element
DTC No. C1611 CAN timeout EMS, C1612 CAN timeout TCU, C1613 CAN wrong matched transmission | Probable cause
Inspect the EMS or TCU according to the instructions of Engine or T/M group. |
• | No message from EMS or TCU for 500ms
• | Message from A/T or M/T signal mismatch the message from ECM or TCU
DTC No. C1610 bus off error | Probable cause
Check CAN bus wiring. Check E37, C33, C133-4 or M42 connectors |
• | CAN bus cable open, or short to ground or battery
DTC No. C2402 motor pump failure (Motor relay, motor) | Probable cause
When the motor power line is normal but no signal is in detected in the motor monitor line. |
• | Malfunction of wiring harness
• | Malfunction of HECU
Powering the motor with the Hi-Scan (Pro) will discharge the battery. Start and run the engine for a while after testingis complete.