Electronically Controlled Brake System (Ebs) (Diagnostics - Introduction): Diagnosis Lexus GS III facelift

HOW TO PROCEED WITH TROUBLESHOOTING

*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS NEXT: Go to next step
3. CHECK DTC AND FREEZE FRAME DATA* NEXT: Go to next step
4. CLEAR DTC AND FREEZE FRAME DATA* NEXT: Go to next step
5. PROBLEM SYMPTOM CONFIRMATION NEXT: Go to next step
6. CHECK CAN COMMUNICATION SYSTEM* Check for output DTCs Refer to «DIAGNOSIS SYSTEM»(ref-382784-S35354466232011012800000) . HINT: The ECU of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system. --> CAN COMMUNICATION SYSTEM DTC IS OUTPUT: PROCEED TO CAN COMMUNICATION SYSTEM --> NO CAN COMMUNICATION SYSTEM DTC IS OUTPUT: GO TO STEP 7
7. CHECK MULTIPLEX COMMUNICATION SYSTEM* Check for output DTCs Refer to «DTC CHECK / CLEAR»(ref-382788-S39836073052011012800000) . HINT: The skid control ECU sends the signals of each warning light to the gateway ECU via CAN communication, and the gateway ECU sends the signals to the combination meter via the multiplex communication system (BEAN). --> MULTIPLEX COMMUNICATION SYSTEM DTC IS OUTPUT: PROCEED TO MULTIPLEX COMMUNICATION SYSTEM --> NO MULTIPLEX COMMUNICATION SYSTEM DTC IS OUTPUT: GO TO STEP 8
8. DTC CHECK AND CLEAR* NEXT: Go to next step
9. PROBLEM SYMPTOM SIMULATION --> SYMPTOM DOES NOT OCCUR: GO TO STEP 10 --> SYMPTOM OCCURS: GO TO STEP 11
10. SYMPTOM SIMULATION NEXT: Go to next step
11. CHECK FOR DTC (OTHER THAN CAN AND MULTIPLEX COMMUNICATION SYSTEM DTC)* Check for output DTCs . Refer to «DTC CHECK / CLEAR»(ref-382793-S21584973372011012800000) . --> NORMAL SYSTEM CODE: GO TO STEP 12 --> TROUBLE CODE: GO TO STEP 13
12. PROBLEM SYMPTOMS TABLE NEXT --> GO TO STEP 14
13. DTC CHART NEXT: Go to next step
14. CIRCUIT INSPECTION* NEXT: Go to next step
15. IDENTIFICATION OF PROBLEM NEXT: Go to next step
16. REPAIR OR REPLACE NEXT: Go to next step
17. CONFIRMATION TEST* NEXT --> END

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1. CHECK FOR INTERMITTENT PROBLEMS HINT: A momentary interruption (open circuit) in the connectors and/or wire harness between the sensors and ECUs can be detected in the ECU Data List function of the Techstream. Turn the engine switch off and connect the Techstream to the DLC3. Turn the engine switch on (IG). Follow the directions on the Techstream to display the Data List and select areas where momentary interruptions are monitored. HINT: A momentary interruption (open circuit) cannot be detected for 3 seconds after the engine switch is turned on (IG) (initial check). ABS / VSC / TRAC: Tester Display Measurement Item/Range Normal Condition Diagnostic Note FR Speed Open FR speed sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - FL Speed Open FL speed sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - RR Speed Open RR speed sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - RL Speed Open RL speed sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - EFI Communication Open EFI communication open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Yaw Rate Open Yaw rate sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Deceleration Open Acceleration sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Steering Open Steering angle sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Master Cylinder Open Master cylinder pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Master Cylinder2 Open Master cylinder pressure sensor 2 open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Stroke Open Stroke sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - FR Wheel Cylinder Open FR wheel cylinder pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - FL Wheel Cylinder Open FL wheel cylinder pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - RR Wheel Cylinder Open RR wheel cylinder pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - RL Wheel Cylinder Open RL wheel cylinder pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Accumulator Open Accumulator pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - HINT: If the ERROR display remains on, check the continuity between the ECU and the sensors, or between ECUs. The ERROR display remains on for 1 second after the harness signal changes from momentary interruption (open circuit) to normal condition. While observing the screen, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs. Result ERROR display does not change. HINT: The connector and/or wire harness will be in momentary interruption (open circuit) if the display changes. Repair or replace connector and/or wire harness as one of them is faulty.

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1. DESCRIPTION Perform initialization of linear solenoid valve and calibration when the skid control ECU, brake actuator or brake pedal stroke sensor is replaced. Follow the procedure to perform initialization. HINT: If there is a problem with battery (12 V) voltage, initialization of linear solenoid valve and calibration cannot be completed normally. Check the battery voltage before performing initialization of linear solenoid valve and calibration. If the actuator's temperature is high, initialization of linear solenoid valve and calibration may not be completed normally. If so, wait until the temperature drops and then perform initialization of linear solenoid valve and calibration. If the engine switch is turned off, the brake pedal is operated or vehicle speed is input while the linear solenoid valve offset learning is being performed, the learning will be canceled. Replacement Parts Necessary Operation Skid control ECU Initialization of linear solenoid valve and calibration Brake actuator assembly Bleeding air Clearing stored value of linear solenoid valve and calibration data Initialization of linear solenoid valve and calibration Brake pedal stroke sensor Brake pedal Inspection and adjustment of brake pedal height Clearing stored value of linear solenoid valve and calibration data Initialization of linear solenoid valve and calibration
2. CLEAR STORED VALUE OF INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING TECHSTREAM:) Connect the Techstream to the DLC3. Move the shift lever to the P position. Turn the engine switch on (IG) with the brake pedal released. Perform the Reset Memory function under the ABS/VSC/TRAC menu. Perform initialization of linear solenoid valve. Perform zero point calibration of yaw rate and acceleration sensor . Refer to «CALIBRATION»(ref-382793-S40522261552011012800000)
3. PERFORM INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING TECHSTREAM:) Connect the Techstream to the DLC3. Move the shift lever to the P position. Turn the engine switch on (IG) with the brake pedal released. NOTE: If the linear solenoid valve offset learning is performed without turning the engine switch on (IG), the learning process may not be completed properly because of insufficient battery voltage. When the linear solenoid valve offset learning is interrupted, or the learning process is performed with the shift lever not in the P position, DTC C1345/66 will be stored. Set the Techstream to Test Mode (select "ECB* Utility"). *: Electronically Control Brake HINT: Refer to the Techstream operator's manual for further details. Leave the vehicle stationary without depressing the brake pedal for 1 or 2 minutes. Check that the interval between blinks of the brake control warning light changes from 1 second to 0.25 seconds. HINT: The time needed to complete initialization of linear solenoid valve and calibration varies depending on battery voltage. The brake control warning light blinks at 1 second intervals during the initialization of linear solenoid valve and calibration. The brake control warning light blinks at 0.25 seconds intervals if the Test Mode is normal. When the brake control warning light changes to the Test Mode display, check that DTC C1345/66, which indicates trouble with stroke sensor zero point learning, is not output. Enter the normal mode from the Test Mode by following the Techstream prompts. HINT: Refer to the Techstream operator's manual for further details.
4. CLEAR STORED VALUE OF INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING SST CHECK WIRE:) Move the shift lever to the P position. Turn the engine switch on (IG) with the brake pedal released. Using SST, connect and disconnect terminals TS and CG of the DLC3 4 times or more within 8 seconds. SST: 09843-18040 Check that no codes other than ABS code 42, VSC code 45 and Electronically Controlled Brake System code 48, 66, or 95 are stored in the diagnostic system. HINT: The ABS warning, brake control warning and SLIP indicator lights do not indicate the normal system code. Remove SST from the terminals of the DLC3.
5. PERFORM INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING SST CHECK WIRE:) Turn the engine switch off. Using SST, connect terminals TS and CG of the DLC3. SST: 09843-18040 Move the shift lever to the P position. Turn the engine switch on (IG) with the brake pedal released. NOTE: If the linear solenoid valve offset learning is performed without turning the engine switch on (IG), the learning process may not be completed properly because of insufficient battery voltage. When the linear solenoid valve offset learning is interrupted, or the learning process is performed with the shift lever not in the P position, DTC C1345/66 will be stored. Leave the vehicle stationary without depressing the brake pedal for 1 or 2 minutes. Check that the interval between blinks of the brake control warning light changes from 1 second to 0.25 seconds. HINT: The time needed to complete initialization of linear solenoid valve and calibration varies depending on the battery voltage. The brake control warning light blinks at 1 second intervals during the initialization of linear solenoid valve and calibration and changes to the Test Mode display. The brake control warning light blinks at 0.25 seconds intervals if the Test Mode is normal. When the brake control warning light changes to the Test Mode display, check that DTC C1345/66, which indicates trouble with stroke sensor zero point learning is not output. Turn the engine switch off and disconnect SST from the DLC3.

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1. DESCRIPTION After replacing the VSC relevant components or performing "Front wheel alignment adjustment", clear and read the sensor calibration data. Follow the procedure to perform calibration. Replacement / Adjustment Parts Necessary Operation Skid control ECU Yaw rate and acceleration sensor zero point calibration Yaw rate and acceleration sensor Clearing zero point calibration data Yaw rate and acceleration sensor zero point calibration Front wheel alignment Clearing zero point calibration data Yaw rate and acceleration sensor zero point calibration
2. CLEAR ZERO POINT CALIBRATION (WHEN USING TECHSTREAM:) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Operate the Techstream to erase the codes (select "Reset Memory"). HINT: Refer to the Techstream operator's manual for further details.
3. PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR (WHEN USING TECHSTREAM:) NOTE: While obtaining the zero point, do not vibrate the vehicle by tilting, moving or shaking it. Keep it in a stationary condition and do not start the engine. Choose a level surface with an inclination of less than 1 degree. Procedures for Test Mode. Ensure that the steering wheel is centered, move the shift lever to the P position, and apply the parking brake. NOTE: DTC C1210/36 and C1336/39 will be recorded if the shift lever is not in the P position. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Set the Techstream to Test Mode (select "Test Mode"). HINT: Refer to the Techstream operator's manual for further details. Obtain the zero point of the yaw rate and acceleration sensor. Keep the vehicle stationary on a level surface for 2 seconds or longer. Check that the ABS warning, brake control warning and SLIP indicator lights blink (Test Mode). HINT: If the ABS warning, brake control warning and SLIP indicator lights do not blink, perform zero point calibration again. The zero point calibration is performed only once after the system enters the Test Mode. Calibration cannot be performed again until the stored data is cleared. Turn the engine switch off and disconnect the Techstream.
4. CLEAR ZERO POINT CALIBRATION (WHEN USING SST CHECK WIRE:) Turn the engine switch on (IG). Using SST, connect and disconnect terminals TS and CG of the DLC3 4 times or more within 8 seconds. SST: 09843-18040 Check that no codes other than ABS code 42, VSC code 45 and Electronically Controlled Brake System code 48, 66, or 95 are stored in the diagnostic system. HINT: The ABS warning, brake control warning and SLIP indicator lights do not indicate the normal system code. Remove SST from the terminals of the DLC3.
5. PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR (WHEN USING SST CHECK WIRE:) NOTE: While obtaining the zero point, do not vibrate the vehicle by tilting, moving or shaking it. Keep it in a stationary condition and do not start the engine. Choose a level surface with an inclination of less than 1 degree. Procedures for Test Mode. Turn the engine switch off. Using SST, connect terminals TS and CG of the DLC3. SST: 09843-18040 Check that the steering wheel is in the straight-ahead position and move the shift lever to the P position. NOTE: DTC C1210/36 and C1336/39 will be recorded if the shift lever is not in the P position. Obtain the zero point of the yaw rate and acceleration sensor. Turn the engine switch on (IG). Keep the vehicle in a stationary condition on a level surface for 2 seconds or more. Check that the ABS warning, brake control warning and SLIP indicator lights blink (Test Mode). HINT: If the ABS warning, brake control warning and SLIP indicator lights do not blink, perform zero point calibration again. The zero point calibration is performed only once after the system enters the Test Mode. Calibration cannot be performed again until the stored data is cleared. Turn the engine switch off and disconnect SST from the DLC3.

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1. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK Release the parking brake. WARNING: When releasing the parking brake, set chocks to hold the vehicle for safety. When the engine switch is on (IG), check that the ABS, BRAKE, brake control warning lights and SLIP and VSC OFF indicator lights illuminate and then turn off after the engine starts. HINT: If the warning light and indicator light check result is not normal, proceed to troubleshooting for the light circuit below. Trouble Area Procedure ABS warning light circuit Refer to «ABS Warning Light Remains ON»(ref-382799-S14235347602011012800000) or Refer to «ABS Warning Light does not Come ON»(ref-382799-S28416683382011012800000) BRAKE warning light circuit Refer to «Brake Warning Light Remains ON»(ref-382799-S16961774812011012800000) or Refer to «Brake Warning Light does not Come ON»(ref-382799-S01987717072011012800000) Brake control warning light circuit Refer to «Brake Control Warning Light Remains ON»(ref-382799-S20686995852011012800000) or Refer to «Brake Control Warning Light does not Come ON»(ref-382799-S36608311702011012800000) SLIP indicator light circuit Refer to «Slip Indicator Light Remains ON»(ref-382799-S21228043942011012800000) or Refer to «Slip Indicator Light does not Come ON»(ref-382799-S02540574992011012800000) VSC OFF indicator light circuit Refer to «VSC OFF Indicator Light Remains ON»(ref-382799-S20398647572011012800000) or Refer to «VSC OFF Indicator Light does not Come ON»(ref-382799-S39864248862011012800000)
2. SENSOR SIGNAL CHECK BY TEST MODE (SIGNAL CHECK) (WHEN USING TECHSTREAM:) NOTE: When having replaced the skid control ECU and/or yaw rate and acceleration sensor, perform zero point calibration of the yaw rate and acceleration sensor. HINT: If the engine switch is turned from on (IG) to on (ACC) or off during Test Mode (signal check), DTCs of the signal check function will be erased. During Test Mode (signal check), the skid control ECU records all DTCs of the signal check function. By performing the Test Mode (signal check), the codes are erased if normality is confirmed. The remaining codes are the codes where an abnormality was found. Procedure for Test Mode. Turn the engine switch off. Connect the Techstream to the DLC3. Check that the steering wheel is centered and move the shift lever to the P position. Turn the engine switch on (IG). Set the Techstream to Test Mode (select "Signal Check"). HINT: Refer to the Techstream operator's manual for further details. Check that the ABS warning, brake control warning and SLIP indicator lights blink (Test Mode). HINT: If the ABS warning, brake control warning and SLIP indicator lights do not blink, inspect the TS and CG terminal circuit, ABS warning, brake control warning and SLIP indicator light circuits. Check the ABS sensor. HINT: Make sure that the ABS warning light is blinking in Test Mode before performing the check.
3. ACCELERATION SENSOR CHECK (WHEN USING TECHSTREAM:) Keep the vehicle stationary on a level surface for 1 second or longer. HINT: The acceleration sensor check can be performed with the following master cylinder pressure sensor check.
4. MASTER CYLINDER PRESSURE SENSOR CHECK (WHEN USING TECHSTREAM:) Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly and continuously depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second. Check that the ABS warning light stays on for 3 seconds. HINT: Ensure that the ABS warning light comes on. While the ABS warning light stays on, continue to depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more. The ABS warning light comes on for 3 seconds every time brake pedal operation above is performed.
5. SPEED SENSOR CHECK (WHEN USING TECHSTREAM:) Check the backward signal. Drive the vehicle in reverse for more than 1 second at the speed of 3 km/h (2 mph) or higher. HINT: Drive the vehicle in reverse and check the speed sensor signal. The signal check cannot be completed if the vehicle speed is 45 km/h (28 mph) or higher. Check the forward signal. Drive the vehicle straight ahead. Drive the vehicle at a speed of 45 km/h (28 mph) or higher for several seconds and check that the ABS warning light goes off. HINT: The signal check may not be completed if the vehicle has its wheels spun. Stop the vehicle. NOTE: Before performing the speed sensor signal check, complete the acceleration sensor and master cylinder pressure sensor checks. The speed sensor signal check may not be completed if the speed sensor signal check is started while turning the steering wheel or spinning the wheels. After the ABS warning light goes off and if the vehicle speed exceeds 80 km/h (50 mph), a signal check code will be stored again. Accelerate or stop the vehicle before the speed reaches 80 km/h (50 mph). If the signal check has not been completed, the ABS warning light blinks while driving and the ABS system does not operate. HINT: When the signal check has been completed, the ABS warning light goes off while driving, and blinks in the Test Mode pattern while the vehicle is stationary. Check the VSC sensor. HINT: Perform the check after checking that the brake control warning and SLIP indicator lights blink.
6. YAW RATE SENSOR CHECK (WHEN USING TECHSTREAM:) Check the zero point voltage of the yaw rate sensor. Keep the vehicle stationary on a level surface for 1 second or longer. Check the output of the yaw rate sensor and the direction of the steering angle sensor. Move the shift lever from the P to the D position and drive the vehicle at a speed of approximately 5 km/h (3 mph), and then turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn. Stop the vehicle and move the shift lever to the P position. Check that the skid control buzzer sounds for 3 seconds. HINT: If the skid control buzzer sounds, the signal check is completed normally. If the skid control buzzer does not sound, check the skid control buzzer circuit, then perform the signal check again. If the skid control buzzer still does not sound, there way be a malfunction in the yaw rate sensor, so check the DTC. At the end of the 180° turn, the direction of the vehicle should be within 175° to 185° of its start position. Do not spin the wheels. Do not turn the engine switch off while turning. Do not move the shift lever to the P position while turning, but change in the vehicle speed, stopping, or driving in reverse is possible. Complete the turn within 20 seconds.
7. END OF SENSOR CHECK (WHEN USING TECHSTREAM:) If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle stops, and the ABS warning light goes off when the vehicle is driving. NOTE: When the yaw rate sensor, acceleration sensor, speed sensor and master cylinder pressure sensor checks are finished, all the sensor checks are completed. If all the sensor checks are not completed, the ABS warning light blinks even while the vehicle is driving and the ABS does not operate.
8. READ DTC OF SIGNAL CHECK FUNCTION (WHEN USING TECHSTREAM:) Read the DTC(s) by following the tester prompt. NOTE: If only the DTCs are displayed, repair the malfunction area and clear the DTCs. If the DTCs or Test Mode codes (DTC of signal check function) are displayed, repair the malfunction area, clear the DTCs and perform the Test Mode inspection. HINT: See the list of DTCs . Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-382793-S06502580872011012800000) .
9. DTC OF TEST MODE FUNCTION (SIGNAL CHECK) (WHEN USING TECHSTREAM:) ABS sensor: Code No. Diagnosis Trouble Area C1271/71 Low output signal of front speed sensor RH Front speed sensor RH Sensor installation Speed sensor rotor C1272/72 Low output signal of front speed sensor LH Front speed sensor LH Sensor installation Speed sensor rotor C1273/73 Low output signal of rear speed sensor RH Rear speed sensor RH Sensor installation Speed sensor rotor C1274/74 Low output signal of rear speed sensor LH Rear speed sensor LH Sensor installation Speed sensor rotor C1275/75 Abnormal change in output signal of front speed sensor RH Front speed sensor rotor RH C1276/76 Abnormal change in output signal of front speed sensor LH Front speed sensor rotor LH C1277/77 Abnormal change in output signal of rear speed sensor RH Rear speed sensor rotor RH C1278/78 Abnormal change in output signal of rear speed sensor LH Rear speed sensor rotor LH C1279/79 Deceleration sensor output voltage malfunction Yaw rate and acceleration sensor Sensor installation C1281/81 Master cylinder pressure sensor output malfunction Master cylinder pressure sensor Stop light switch circuit VSC SENSOR: Code No. Diagnosis Trouble Area C0371/71 Yaw rate sensor Yaw rate and acceleration sensor ELECTRONICALLY CONTROLLED BRAKE SYSTEM SENSOR: Code No. Diagnosis Trouble Area C1346/71 Stroke sensor zero point learning malfunction Brake pedal stroke sensor HINT: The codes in this table are output only in Test Mode (signal check).
10. SENSOR SIGNAL CHECK BY TEST MODE (SIGNAL CHECK) (WHEN USING SST CHECK WIRE:) NOTE: When having replaced the skid control ECU and/or yaw rate and acceleration sensor, perform zero point calibration of the yaw rate and acceleration sensor. HINT: If the engine switch is turned from on (IG) to on (ACC) or off during Test Mode (signal check), DTCs of the signal check function will be erased. During Test Mode (signal check), the skid control ECU records all DTCs of the signal check function. By performing the Test Mode (signal check), the codes are erased if normality is confirmed. The remaining codes are the codes where an abnormality was found. Procedure for Test Mode. Turn the engine switch off. Check that the steering wheel is in the straight-ahead position and move the shift lever to the P position. Using SST, connect terminals TS and CG of the DLC3. SST: 09843-18040 Turn the engine switch on (IG). Check that the ABS warning, brake control warning and SLIP indicator lights blink (Test Mode). HINT: If the ABS warning, brake control warning and SLIP indicator lights do not blink, inspect the TS and CG terminal circuit, ABS warning, brake control warning and SLIP indicator light circuits. Check the ABS sensor. HINT: Make sure that the ABS warning light is blinking in Test Mode before performing the check.
11. ACCELERATION SENSOR CHECK (WHEN USING SST CHECK WIRE:) Keep the vehicle stationary on a level surface for 1 second or longer. HINT: The acceleration sensor check can be performed with the following master cylinder pressure sensor check.
12. MASTER CYLINDER PRESSURE SENSOR CHECK (WHEN USING SST CHECK WIRE:) Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly and continuously depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second. Check that the ABS warning light stays on for 3 seconds. HINT: Ensure that the ABS warning light comes on. While the ABS warning light stays on, continue to depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more. The ABS warning light comes on for 3 seconds every time the brake pedal operation above is performed.
13. SPEED SENSOR CHECK (WHEN USING SST CHECK WIRE:) Check the backward signal. Drive the vehicle in reverse for more than 1 second at a speed of 3 km/h (2 mph) or higher. HINT: Drive the vehicle in reverse and check the speed sensor signal. The signal check cannot be completed if the vehicle speed is 45 km/h (28 mph) or higher. Check the forward signal. Drive the vehicle straight ahead. Drive the vehicle at a speed of 45 km/h (28 mph) or higher for several seconds and check that the ABS warning light goes off. HINT: The signal check may not be completed if the vehicle has its wheels spun. Stop the vehicle. NOTE: Before performing the speed sensor signal check, complete the acceleration sensor and master cylinder pressure sensor checks. The speed sensor signal check may not be completed if the speed sensor signal check is started while turning the steering wheel or spinning the wheels. After the ABS warning light goes off, if vehicle speed exceeds 80 km/h (50 mph), a signal check code will be stored again. Accelerate or stop the vehicle before the speed reaches 80 km/h (50 mph). If the signal check has not been completed, the ABS warning light blinks while driving and the ABS system does not operate. HINT: When the signal check has been completed, the ABS warning light goes off while driving, and blinks in the Test Mode pattern while the vehicle is stationary. Check the VSC sensor. HINT: Perform the check after checking that the brake control warning and SLIP indicator lights blink.
14. YAW RATE SENSOR CHECK (WHEN USING SST CHECK WIRE:) Check the zero point voltage of the yaw rate sensor. Keep the vehicle stationary on a level surface for 1 second or longer. Check the output of the yaw rate sensor and the direction of the steering angle sensor. Move the shift lever from the P to the D position and drive the vehicle at a speed of approximately 5 km/h (3 mph), and turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn. Stop the vehicle and move the shift lever to the P position. Check that the skid control buzzer sounds for 3 seconds. HINT: If the skid control buzzer sounds, the signal check is completed normally. If the skid control buzzer does not sound, check the skid control buzzer circuit, then perform the signal check again. If the skid control buzzer still does not sound, there may be a malfunction in the yaw rate sensor, so check the DTC. At the end of the 180° turn, the direction of the vehicle should be within 175° to 185° of its start position. Do not spin the wheels. Do not turn the engine switch off while turning. Do not move the shift lever to the P position while turning, but change in the vehicle speed, stopping, or driving in reverse is possible. Complete the turn within 20 seconds.
15. END OF SENSOR CHECK (WHEN USING SST CHECK WIRE:) If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle stops and the ABS warning light goes off when the vehicle is driving. NOTE: When the yaw rate sensor, acceleration sensor, speed sensor and master cylinder pressure sensor checks are completed, the sensor checks are completed. If the sensor checks are not finished, all the ABS warning light blinks even while the vehicle is driving and the ABS does not operate.
16. READ DTC OF SIGNAL CHECK FUNCTION (WHEN USING SST CHECK WIRE:) Using SST, connect terminals TC and CG of the DLC3. SST: 09843-18040 Count the number of blinks of the ABS warning, brake control warning and SLIP indicator lights. NOTE: If only DTCs are displayed, repair the malfunction area and clear the DTCs. If the DTCs or Test Mode codes (DTC of signal check function) are displayed, repair the malfunction area, clear the DTCs and perform the Test Mode inspection. HINT: If more than 1 malfunction is detected at the same time, the lowest numbered code will be displayed first. See the list of DTCs . Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-382793-S06502580872011012800000) . After performing the check, disconnect SST from terminals and TC and CG of the DLC3. Then turn the engine switch off. Turn the engine switch on (IG). HINT: If the engine switch is not turned on (IG) after SST is removed from the DLC3, the previous Test Mode will continue.
17. DTC OF TEST MODE FUNCTION (SIGNAL CHECK) (WHEN USING SST CHECK WIRE:) ABS sensor: Code No. Diagnosis Trouble Area C1271/71 Low output signal of front speed sensor RH Front speed sensor RH Sensor installation Speed sensor rotor C1272/72 Low output signal of front speed sensor LH Front speed sensor LH Sensor installation Speed sensor rotor C1273/73 Low output signal of rear speed sensor RH Rear speed sensor RH Sensor installation Speed sensor rotor C1274/74 Low output signal of rear speed sensor LH Rear speed sensor LH Sensor installation Speed sensor rotor C1275/75 Abnormal change in output signal of front speed sensor RH Front speed sensor rotor RH C1276/76 Abnormal change in output signal of front speed sensor LH Front speed sensor rotor LH C1277/77 Abnormal change in output signal of rear speed sensor RH Rear speed sensor rotor RH C1278/78 Abnormal change in output signal of rear speed sensor LH Rear speed sensor rotor LH C1279/79 Deceleration sensor output voltage malfunction Yaw rate and acceleration sensor Sensor installation C1281/81 Master cylinder pressure sensor output malfunction Master cylinder pressure sensor Stop light switch circuit VSC SENSOR: Code No. Diagnosis Trouble Area C0371/71 Yaw rate sensor Yaw rate and acceleration sensor ELECTRONICALLY CONTROLLED BRAKE SYSTEM SENSOR: Code No. Diagnosis Trouble Area C1346/71 Stroke sensor zero point learning malfunction Brake pedal stroke sensor HINT: The codes in this table are output only in Test Mode (signal check).

PROBLEM SYMPTOMS TABLE

HINT

1. Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.
3. Since the oil passage is blocked off by the master cut solenoid during Electronically Controlled Brake System control, there is no kickback (vibration) to the brake pedal, creating a quiet operating sound even while the ABS is operating.

ELECTRONICALLY CONTROLLED BRAKE SYSTEM

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Scheme 109

Scheme 110

1. TERMINALS OF ECU Symbols (Terminal No.) Terminal Description GND (1) Skid control ECU ground BS1 (2) FR, RL linear solenoid switching valve (SMC1, SS) power supply FRA+ (3) FR pressure increase linear solenoid (+) output FRR+ (4) FR pressure decrease linear solenoid (+) output SMC1 (5) Master cut solenoid 1 output BZ (6) Skid control buzzer output SP1 (7) Speed signal output to combination meter ENA (8) Capacitor signal output PCK1 (9) Pressure sensor 1 stuck check output FRO (10) FR wheel speed signal output RL+ (11) RL wheel speed sensor power supply output RL- (12) RL wheel speed sensor input CTY+ (13) Start power supply input (Door) PMC1 (14) Master cylinder pressure sensor 1 signal input FR+ (15) FR wheel speed sensor power supply output IG1 (16) IG1 power supply FRR- (17) FR pressure decrease linear solenoid (-) output FRA- (18) FR pressure increase linear solenoid (-) output RLR- (19) RL pressure decrease linear solenoid (-) output MR1 (20) Motor relay 1 power supply output CBI1 (21) Capacitor power supply input 1 VBZ (22) Skid control buzzer power supply output FAIL (23) Capacitor signal input TS (25) Signal check (Test Mode) input PAC1 (26) Accumulator pressure sensor 1 signal input VCM (27) Pressure sensor 1 power supply output FR- (28) FR wheel speed sensor input +B (29) Start power supply input (STP) R1+ (30) Main relay 1 power supply output BSO3 (31) Stroke simulator cut solenoid power supply output BSO1 (32) SMC1 power supply output RLA+ (33) RL pressure increase linear solenoid (+) output RLR+ (34) RL pressure decrease linear solenoid (+) output RLA- (35) RL pressure increase linear solenoid (-) output R1- (36) Motor relay 1 output MTT (37) Motor relay test input DO1 (38) +B output 1 DI1 (39) +B input 1 SS (40) Stroke simulator cut solenoid output PRL (42) RL wheel cylinder pressure sensor signal input E (43) Pressure sensor 1 ground PFR (44) FR wheel cylinder pressure sensor signal input STP (45) Stop light switch input R3+ (46) Main relay 1 output Symbols (Terminal No.) Terminal Description SKS2 (1) Brake pedal stroke sensor signal 2 input SKS (3) Brake pedal stroke sensor signal 1 input SKG (4) Brake pedal stroke sensor ground VCSK (5) Brake pedal stroke sensor power supply output Symbols (Terminal No.) Terminal Description GND4 (1) Skid control ECU ground BS2 (2) FL, RR linear solenoid switching valve (SMC2) power supply FLA+ (3) FL pressure increase linear solenoid (+) output FLR+ (4) FL pressure decrease linear solenoid (+) output SMC2 (6) Master cut solenoid 2 output PCK2 (7) Pressure sensor 1 stuck check output CANH (9) CAN communication line H FLO (10) FL wheel speed signal output RR+ (11) RR wheel speed sensor power supply output LBL (13) Brake fluid level warning switch input PMC2 (14) Master cylinder pressure sensor 2 signal input FL+ (15) FL wheel speed sensor power supply output IG2 (16) IG2 power supply FLR- (17) FL pressure decrease linear solenoid (-) output FLA- (18) FL pressure increase linear solenoid (-) output RRA- (20) RR pressure increase linear solenoid (-) output R2- (21) Motor relay 2 output CANL (22) CAN communication line L PKB (23) Parking brake switch input RR- (27) RR wheel speed sensor input VCM2 (28) Pressure sensor 2 power supply output FL- (29) FL wheel speed sensor input R2+ (30) Main relay 2 power supply output BSO2 (32) SMC2 power supply output RRA+ (33) RR pressure increase linear solenoid (+) output RRR+ (34) RR pressure decrease linear solenoid (+) output RRR- (36) RR pressure decrease linear solenoid (-) output MR2 (37) Motor relay 2 power supply output DI2 (38) +B input 2 DO2 (39) +B output 2 CBI2 (40) Capacitor power supply input 2 CSW (41) VSC OFF switch input PRR (43) RR wheel cylinder pressure sensor signal input E2 (44) Pressure sensor 2 ground PFL (45) FL wheel cylinder pressure sensor signal input R4+ (46) Main relay 2 output
2. TERMINAL INSPECTION Disconnect the connector and measure the voltage or resistance on the wire harness side. HINT: Voltage cannot be measured with the connector connected to the skid control ECU as the connector is watertight. Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (A13-1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 ohms IG1 (A13-16) - Body ground B-Y - Body ground IG1 power supply Engine switch on (IG) 10 to 14 V +B (A13-29) - Body ground G-R - Body ground Start power supply input (STP) Always 10 to 14 V DI1 (A13-39) - Body ground GR - Body ground +B input 1 Always 10 to 14 V STP (A13-45) - Body ground R-W - Body ground Stop light switch input Stop light switch ON --> OFF (Brake pedal depressed --> released) 8 to 14 V --> Below 1.5 V GND4 (A15-1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 ohms LBL (A15-13) - Body ground Y-B - Body ground Brake fluid level warning switch input Brake fluid level is minimum level --> maximum level 1.9 to 2.1 kohms --> Below 1 ohms IG2 (A15-16) - Body ground B-Y - Body ground IG2 power supply Engine switch on (IG) 10 to 14 V PKB (A15-23) - Body ground Y-R - Body ground Parking brake switch input Engine switch on (IG), parking brake switch ON --> OFF Below 1.5 V --> 10 to 14 V DI2 (A15-38) - Body ground B - Body ground +B input 2 Always 10 to 14 V

Scheme 111

1. DIAGNOSIS If the skid control ECU detects a malfunction, it will warn the driver by turning on the ABS, BRAKE and brake control warning lights and SLIP and master caution indicator lights will come on in order to warn the driver. The DTCs are simultaneously stored in the memory. The DTCs can be read by connecting SST between terminals TC and CG of the DLC3 and observing the blinking pattern of the ABS warning, brake control warning and SLIP indicator lights, or by connecting the Techstream. This system has a signal check function. The DTC can be read by connecting the Techstream and observing the blinking pattern of the ABS warning, brake control warning and SLIP indicator lights, or by connecting the Techstream.
2. WARNING LIGHT AND INDICATOR LIGHT BULB CHECK Release the parking brake. WARNING: When releasing the parking brake, set chocks to hold the vehicle for safety. When the engine switch is turned on (IG), check that the ABS, BRAKE and brake control warning lights and SLIP and VSC OFF indicator lights illuminate and then turn off after the engine starts. HINT: If the warning light and indicator light check result is not normal, proceed to troubleshooting for the light circuit below. Trouble area Procedure ABS warning light circuit Refer to «ABS Warning Light Remains ON»(ref-382799-S14235347602011012800000) BRAKE warning light circuit Refer to «Brake Warning Light Remains ON»(ref-382799-S16961774812011012800000) Brake control warning light circuit Refer to «Brake Control Warning Light Remains ON»(ref-382799-S20686995852011012800000) SLIP indicator light circuit Refer to «Slip Indicator Light Remains ON»(ref-382799-S21228043942011012800000) VSC OFF indicator light circuit Refer to «VSC OFF Indicator Light Remains ON»(ref-382799-S20398647572011012800000)

Scheme 112

1. DTC CHECK/CLEAR (WHEN USING TECHSTREAM:) DTC check Connect the Techstream to the DLC3. Turn the engine switch on (IG). Read the DTCs following the prompts on the tester screen. DTC clear Connect the Techstream to the DLC3. Turn the engine switch on (IG). Operate the Techstream to clear the codes. HINT: Refer to the Techstream operator's manual for further details.
2. DTC CHECK/CLEAR (WHEN USING SST CHECK WIRE:) DTC check Using SST, connect terminals TC and CG of the DLC3. SST: 09843-18040 Turn the engine switch on (IG). Observe the blinking pattern of the ABS warning, brake control warning and SLIP indicator lights in order to identify the DTC. HINT: If no code appears, inspect the TC and CG terminal circuit, and ABS warning, brake control warning and SLIP indicator light circuits. Trouble Area Procedure TC and CG terminal circuit Refer to «TC and CG Terminal Circuit»(ref-382799-S29063767542011012800000) ABS warning light circuit Refer to «ABS Warning Light Remains ON»(ref-382799-S14235347602011012800000) or Refer to «ABS Warning Light does not Come ON»(ref-382799-S28416683382011012800000) Brake control warning light circuit Refer to «Brake Control Warning Light Remains ON»(ref-382799-S20686995852011012800000) or Refer to «Brake Control Warning Light does not Come ON»(ref-382799-S36608311702011012800000) SLIP indicator light circuit Refer to «Slip Indicator Light Remains ON»(ref-382799-S21228043942011012800000) or Refer to «Slip Indicator Light does not Come ON»(ref-382799-S02540574992011012800000) As an example, the illustration below shows the blinking patterns of the normal system code and trouble codes 11 and 21 for the ABS warning, brake control warning and SLIP indicator lights. Codes are explained in the code table . Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-382793-S06502580872011012800000) . After completing the check, disconnect terminals TC and CG of the DLC3, and turn the display off. If 2 or more DTCs are detected at the same time, the DTCs will be displayed in ascending order. DTC clear Using SST, connect terminals TC and CG of the DLC3. SST: 09843-18040 Turn the engine switch on (IG). Clear the DTCs stored in the ECU by depressing the brake pedal 8 times or more within 5 seconds. Check that the warning light indicates a normal system code. Remove the SST from the terminals of the DLC3. HINT: Clearing the DTCs cannot be performed by removing the battery cable or the ECU-IG fuse.
3. END OF DTC CHECK/CLEAR (WHEN USING SST CHECK WIRE:) Turn the engine switch on (IG). Check that the ABS warning, brake control warning and SLIP indicator lights illuminate and then turn off after the engine starts.

DATA LIST / ACTIVE TEST

1. DATA LIST HINT: With the Techstream connected to the DLC3 and the engine switch on (IG), the Electronically Controlled Brake System, ABS, and VSC Data List can be displayed. Follow the prompts on the tester screen to access the Data List. ABS / VSC / TRAC: Tester Display Measurement Item/Range Normal Condition Diagnostic Note ABS Warning Light ABS warning light / ON or OFF ON: Warning light ON OFF: Warning light OFF - Brake Warning Light BRAKE warning light / ON or OFF ON: Warning light ON OFF: Warning light OFF - Slip Indicator Light SLIP indicator light / ON or OFF ON: Indicator light ON OFF: Indicator light OFF - ECB* Warning Light Brake control warning light / ON or OFF ON: Warning light ON OFF: Warning light OFF - Buzzer Skid control buzzer / ON or OFF ON: Buzzer ON OFF: Buzzer OFF - Stop Light SW Stop light switch / ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - Parking Brake SW Parking brake switch / ON or OFF ON: Parking brake applied OFF: Parking brake released - TRC / VSC Off Mode VSC OFF Switch / NORMAL, TRC OFF or VSC OFF NORMAL: Normal mode TRC OFF: TRAC off mode VSC OFF: VSC off mode - Reservoir Warning SW Brake fluid level warning switch / ON or OFF ON: Reservoir level normal OFF: Reservoir level low - Main Idle SW Main idle switch / ON or OFF ON: Accelerator pedal released OFF: Accelerator pedal depressed - Gear Position Gear position information / P/N, R, 1st-8th, FAIL, NOT R Actual gear position - Shift Lever Position Shift lever position information / P/N, R, D/M, 1st-6th/B, FAIL Actual shift lever position - Shift Information Shift information / ON or OFF ON: During gear change - Inspection Mode Inspection mode / OTHER or INSPECT OTHER: Normal Mode INSPECT: Inspection Mode - Number of IG ON (Inspection) Number of IG ON after entering the inspection mode / min.: 0, max.: 255 Min.: 0 Max.: 255 - Master Cylinder Sensor Master cylinder pressure sensor 1 reading / min.: 0 V, max.: 5 V When brake pedal is released: 0.3 to 0.9 V Reading increases when brake pedal is depressed Voltage of M/C Voltage of master cylinder pressure sensor / min.: -2.5 V, max.: 2.49 V When brake pedal is released: 0.3 to 0.9 V - Master Cylinder Sensor 2 Master cylinder pressure sensor 2 reading / min.: 0 V, max.: 5 V When brake pedal is released: 0.3 to 0.9 V Reading increases when brake pedal is depressed Voltage of M/C 2 Voltage of master cylinder pressure sensor 2 / min.: -2.5 V, max.: 2.49 V When brake pedal is released: 0.3 to 0.9 V - Stroke Sensor Stroke sensor / min.: 0 V, max.: 5 V When brake pedal is released: 0.7 to 1.3 V - Voltage of Stroke Sensor Voltage of stroke sensor / min.: -2.5 V, max.: 2.49 V When brake pedal is released: 0.7 to 1.3 V - Stroke Sensor 2 Stroke sensor 2 / min.: 0 V, max.: 5 V When brake pedal is released: 3.7 to 4.3 V - Voltage of Stroke Sensor 2 Voltage of stroke sensor 2 / min.: -2.5 V, max.: 2.49 V When brake pedal is released: 3.7 to 4.3 V - Accumulator Sensor Accumulator pressure sensor / min.: 0 V, max.: 5 V Specified value: 2.6 to 3.8 V - Deceleration Sensor Acceleration sensor 1 reading / min.: -18.52 m/s 2 , max.: 18.39 m/s 2 Min.: -18.52 m/s 2 Max.: 18.39 m/s 2 Reading changes when vehicle is bounced Zero Point of Decele Memorized zero value / min.: -25.11 m/s 2 , max.: 24.91 m/s 2 Min.: -25.11 m/s 2 Max.: 24.91 m/s 2 - Deceleration Sensor 2 Acceleration sensor 2 reading / min.: -18.52 m/s 2 , max.: 18.39 m/s 2 Min.: -18.52 m/s 2 Max.: 18.39 m/s 2 Reading changes when vehicle is bounced Zero Point of Decele 2 Memorized zero value / min.: -25.11 m/s 2 , max.: 24.91 m/s 2 Min.: -25.11 m/s 2 Max.: 24.91 m/s 2 - Yaw Rate Sensor Yaw rate sensor 1 / min.: -128 deg/s, max.: 127 deg/s Min.: -128 deg/s Max.: 127 deg/s - Zero Point of Yaw Rate Memorized zero value / min.: -128 deg/s, max.: 127 deg/s Min.: -128 deg/s Max.: 127 deg/s - Yaw Rate Sensor 2 Yaw rate sensor 2 / min.: -128 deg/s, max.: 127 deg/s Min.: -128 deg/s Max.: 127 deg/s - Zero Point of Yaw Rate 2 Memorized zero value / min.: -128 deg/s, max.: 127 deg/s Min.: -128 deg/s Max.: 127 deg/s - Steering Angle Sensor Steering angle sensor / min.: -3276.8 deg, max.: 3276.7 deg Left turn: Increase Right turn: Decrease - Zero Point of Steering Angle Memorized zero value / min.: -3276.8 deg, max.: 3276.7 deg Min.: -3276.8 deg Max.: 3276.7 deg - FR W/C Sensor FR wheel cylinder pressure sensor / min.: 0 V, max.: 5 V When brake pedal is released: 0.3 to 0.9 V - FL W/C Sensor FL wheel cylinder pressure sensor / min.: 0 V, max.: 5 V When brake pedal is released: 0.3 to 0.9 V - RR W/C Sensor RR wheel cylinder pressure sensor / min.: 0 V, max.: 5 V When brake pedal is released: 0.3 to 0.9 V - RL W/C Sensor RL wheel cylinder pressure sensor / min.: 0 V, max.: 5 V When brake pedal is released: 0.3 to 0.9 V - Lateral G Lateral G / min.: -25.11 m/s 2 , max.: 24.91 m/s 2 Min.: -25.11 m/s 2 Max.: 24.91 m/s 2 - Forward and Rearward G Forward and rearward G / min.: -25.11 m/s 2 , max.: 24.91 m/s 2 Min.: -25.11 m/s 2 Max.: 24.91 m/s 2 - Yaw Rate Value Yaw rate value / min.: -128 deg/s, max.: 127 deg/s Min.: -128 deg/s Max.: 127 deg/s - Steering Angle Value Steering angle value / min.: -3276.8 deg, max.: 3276.7 deg Min.: -3276.8 deg Max.: 3276.7 deg - FR Wheel Speed Wheel speed sensor (FR) reading / min.: 0 km/h (0 mph), max.: 326.4 km/h (202 mph) Actual wheel speed Similar speed as indicated on speedometer FL Wheel Speed Wheel speed sensor (FL) reading / min.: 0 km/h (0 mph), max.: 326.4 km/h (202 mph) Actual wheel speed Similar speed as indicated on speedometer RR Wheel Speed Wheel speed sensor (RR) reading / min.: 0 km/h (0 mph), max.: 326.4 km/h (202 mph) Actual wheel speed Similar speed as indicated on speedometer RL Wheel Speed Wheel speed sensor (RL) reading / min.: 0 km/h (0 mph), max.: 326.4 km/h (202 mph) Actual wheel speed Similar speed as indicated on speedometer Vehicle Speed Maximum wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326.4 km/h (202 mph) Actual vehicle speed Speed indicated on speedometer FR Wheel Acceleration FR wheel acceleration / min.: -200.84 m/s 2 , max.: 199.27 m/s 2 Min.: -200.84 m/s 2 Max.: 199.27 m/s 2 - FL Wheel Acceleration FL wheel acceleration / min.: -200.84 m/s 2 , max.: 199.27 m/s 2 Min.: -200.84 m/s 2 Max.: 199.27 m/s 2 - RR Wheel Acceleration RR wheel acceleration / min.: -200.84 m/s 2 , max.: 199.27 m/s 2 Min.: -200.84 m/s 2 Max.: 199.27 m/s 2 - RL Wheel Acceleration RL wheel acceleration / min.: -200.84 m/s 2 , max.: 199.27 m/s 2 Min.: -200.84 m/s 2 Max.: 199.27 m/s 2 - FR Wheel Direction Wheel direction (FR) / FORWARD or BACK FORWARD: Forward BACK: Back - FL Wheel Direction Wheel direction (FL) / FORWARD or BACK FORWARD: Forward BACK: Back - RR Wheel Direction Wheel direction (RR) / FORWARD or BACK FORWARD: Forward BACK: Back - RL Wheel Direction Wheel direction (RL) / FORWARD or BACK FORWARD: Forward BACK: Back - Stabilizer Information Stabilizer information / WITH, WITHOUT or UNKNOWN WITH: with WITHOUT: without UNKNOWN: unknown - FR Wheel ABS Ctrl Status FR wheel ABS control status / ON or OFF ON: During the control - FL Wheel ABS Ctrl Status FL wheel ABS control status / ON or OFF ON: During the control - RR Wheel ABS Ctrl Status RR wheel ABS control status / ON or OFF ON: During the control - RL Wheel ABS Ctrl Status RL wheel ABS control status / ON or OFF ON: During the control - BA Ctrl Status BA control status / ON or OFF ON: During the control - PBA Ctrl Status PBA control status / ON or OFF ON: During the control - TRC (TRAC) Ctrl Status TRAC control status / ON or OFF ON: During the control - TRC (TRAC) Engine Ctrl Status TRAC engine control status / ON or OFF ON: During the control - TRC (TRAC) Brake Ctrl Status TRAC brake control status / ON or OFF ON: During the control - FR Wheel VSC Ctrl Status FR wheel VSC control status / ON or OFF ON: During the control - FL Wheel VSC Ctrl Status FL wheel VSC control status / ON or OFF ON: During the control - RR Wheel VSC Ctrl Status RR wheel VSC control status / ON or OFF ON: During the control - RL Wheel VSC Ctrl Status RL wheel VSC control status / ON or OFF ON: During the control - Engine Revolutions Engine revolutions / min.: 0 r/min, max.: 65535 r/min Min.: 0 r/min Max.: 65535 r/min - Real Engine Torque Real engine torque / min.: -1024 Nm, max.: 1023 Nm Min.: -1024 Nm Max.: 1023 Nm - Accelerator Opening Angle % Percentage of accelerator pedal opening angle / min.: 0%, max.: 128% Min.: 0% Max.: 128% - ECB* Motor Relay ABS motor relay / ON or OFF ON: Motor relay ON OFF: Motor relay OFF - ECB* Motor Relay 2 ABS motor relay 2 / ON or OFF ON: Motor relay ON OFF: Motor relay OFF - ECB* Main Relay ABS main relay / ON or OFF ON: Main relay ON OFF: Main relay OFF - ECB* Main Relay 2 ABS main relay 2 / ON or OFF ON: Main relay ON OFF: Main relay OFF - ECB* Solenoid (SMC1) Master cut solenoid (SMC1) / ON or OFF ON: Operate OFF: Not operate - ECB* Solenoid (SMC2) Master cut solenoid (SMC2) / ON or OFF ON: Operate OFF: Not operate - ECB* Solenoid (SCSS) Stroke simulator solenoid (SCSS) / ON or OFF ON: Operate OFF: Not operate - SLAFR Solenoid Current SLAFR solenoid current / min.: 0 A, max.: 3 A When brake pedal is released: 0 A - SLAFL Solenoid Current SLAFL solenoid current / min.: 0 A, max.: 3 A When brake pedal is released: 0 A - SLARR Solenoid Current SLARR solenoid current / min.: 0 A, max.: 3 A When brake pedal is released: 0 A - SLARL Solenoid Current SLARL solenoid current / min.: 0 A, max.: 3 A When brake pedal is released: 0 A - SLRFR Solenoid Current SLRFR solenoid current / min.: 0 A, max.: 3 A When brake pedal is released: 0 A - SLRFL Solenoid Current SLRFL solenoid current / min.: 0 A, max.: 3 A When brake pedal is released: 0 A - SLRRR Solenoid Current SLRRR solenoid current / min.: 0 A, max.: 3 A When brake pedal is released: 0 A - SLRRL Solenoid Current SLRRL solenoid current / min.: 0 A, max.: 3 A When brake pedal is released: 0 A - FR Speed Open FR speed sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - FL Speed Open FL speed sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - RR Speed Open RR speed sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - RL Speed Open RL speed sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - EFI Communication Open EFI communication open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Yaw Rate Open Yaw rate sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Deceleration Open Acceleration sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Steering Open Steering angle sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Master Cylinder Open Master cylinder pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Master Cylinder 2 Open Master cylinder pressure sensor 2 open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Stroke Open Stroke sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - FR Wheel Cylinder Open FR wheel cylinder pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - FL Wheel Cylinder Open FL wheel cylinder pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - RR Wheel Cylinder Open RR wheel cylinder pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - RL Wheel Cylinder Open RL wheel cylinder pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Accumulator Open Accumulator pressure sensor open detection / ERROR or NORMAL ERROR: Momentary interruption NORMAL: Normal - Number of DTC Number of DTC / min.: 0, max.: 255 Min.: 0 Max.: 255 - *: Electronically Control Brake
2. ACTIVE TEST HINT: Performing the Active Test using the Techstream allows the relay, actuator, etc. to operate without removing any parts. Performing the Active Test as the first step in troubleshooting is one way to save time. It is possible to display the Data List during the Active Test. Connect the Techstream to the DLC3. Turn the engine switch on (IG). According to the display on the tester, perform the Active Test. HINT: The engine switch must be turned on (IG) to proceed to the Active Test using the Techstream. ABS / VSC / TRAC: Tester Display Test Part Control Range Diagnostic Note ABS Warning Light ABS warning light Warning light ON / OFF Observe combination meter Brake Warning Light BRAKE warning light Warning light ON / OFF Observe combination meter Slip Indicator Light SLIP indicator light Indicator light ON / OFF Observe combination meter VSC OFF Indicator Light VSC OFF indicator light Indicator light ON / OFF Observe combination meter TRAC OFF Indicator Light Multi-information display (TRAC OFF indicator) Display ON / OFF Observe combination meter ECB* Warning Light Brake control warning light Warning light ON / OFF Observe combination meter Buzzer Skid control buzzer Buzzer ON / OFF Buzzer can be heard Stop Light Relay Stop light operation relay Relay ON / OFF Observe rear combination light (stop light) (Does not come on for 5 sec. or more) ECB* Main Relay ABS main relay Relay ON / OFF Operation sound of relay (clicking sound) can be heard ECB* Main Relay 2 ABS main relay 2 Relay ON / OFF Operation sound of relay (clicking sound) can be heard ECB* Motor Relay ABS motor relay Relay ON / OFF Operation sound of relay (clicking sound) and motor can be heard ECB* Motor Relay 2 ABS motor relay 2 Relay ON / OFF Operation sound of relay (clicking sound) and motor can be heard ECB* Solenoid (SMC1) Master cut solenoid (SMC1) Solenoid ON / OFF Operation sound of solenoid (clicking sound) can be heard ECB* Solenoid (SMC2) Master cut solenoid (SMC2) Solenoid ON / OFF Operation sound of solenoid (clicking sound) can be heard ECB* Control Invalid Electronically controlled brake system control invalid Control invalid ON / OFF Electronically controlled brake system control is blocked (braking with no boost assist) Accumulator Zero Down Accumulator zero down activation Activation ON / OFF Brake fluid existing the accumulator makes noise Stroke Simulator Cut Valve Pattern Stroke simulator cut valve pattern activation Activation ON / OFF - (Difficult to identify visually) Actuator Air Bleeding Pattern Actuator air bleeding pattern activation Activation ON / OFF When accumulator pressure lowers, pump operation creates sound Power Supply Air Bleeding Pattern 1 Power supply air bleeding pattern activation 1 Activation ON / OFF When accumulator pressure lowers, pump operation creates sound Power Supply Air Bleeding Pattern 2 Power supply air bleeding pattern activation 2 Activation ON / OFF When accumulator pressure lowers, pump operation creates sound RL Wheel Air Bleeding Pattern RL wheel air bleeding pattern activation Activation ON / OFF When accumulator pressure lowers, pump operation creates sound RR Wheel Air Bleeding Pattern RR wheel air bleeding pattern activation Activation ON / OFF When accumulator pressure lowers, pump operation creates sound Pump Check Pattern Pump check pattern activation Activation ON / OFF When accumulator pressure lowers, pump operation creates sound Drain System Air Bleeding Pattern Drain system air bleeding pattern activation Activation ON / OFF When accumulator pressure lowers, pump operation creates sound ECB* Solenoid (SLRRL) Valve Close Linear solenoid (SLRRL) valve Valve close ON / OFF - ECB* Solenoid (SLARL) Valve Close Linear solenoid (SLARL) valve Valve close ON / OFF - ECB* Solenoid (SLRRR) Valve Close Linear solenoid (SLRRR) valve Valve close ON / OFF - ECB* Solenoid (SLARR) Valve Close Linear solenoid (SLARR) valve Valve close ON / OFF - ECB* Solenoid (SLRFL) Valve Close Linear solenoid (SLRFL) valve Valve close ON / OFF - ECB* Solenoid (SLAFL) Valve Close Linear solenoid (SLAFL) valve Valve close ON / OFF - ECB* Solenoid (SLRFR) Valve Close Linear solenoid (SLRFR) valve Valve close ON / OFF - ECB* Solenoid (SLAFR) Valve Close Linear solenoid (SLAFR) valve Valve close ON / OFF - *: Electronically Controlled Brake

DIAGNOSTIC TROUBLE CODE CHART

HINT

1. If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "Table" below.
2. Inspect the fuse and relay before investigating the trouble areas as shown in the table below.

DTC CHART OF ABS

1. Drive the vehicle at a speed of 50 km/h (31 mph) and depress the brake pedal strongly for approximately 3 seconds.
2. Repeat the above operation 3 times or more and check that the ABS warning light goes off.
3. Clear the DTC.

HINT

1. In some cases, the Techstream cannot be used when the ABS warning light remains on.
2. When U0073/94, U0100/65, U0123/62, U0124/95, U0126/63, U0130/68 or U0131/67 is output, inspect and repair the trouble areas indicated by these codes first.

DTC CHART OF VSC

DTC CHART OF ELECTRONICALLY CONTROLLED BRAKE SYSTEM

(*1): These codes are displayed to indicate the ABS and Electronically Controlled Brake System DTCs.

TEST MODE DTC OF ABS

TEST MODE DTC OF VSC

TEST MODE DTC OF ELECTRONICALLY CONTROLLED BRAKE SYSTEM