ELECTRONICALLY CONTROLLED BRAKE SYSTEM > TEST MODE PROCEDURE |
WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK |
Release the parking brake.
When the power switch is turned on (IG), check that the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction) and slip indicator lights come on until the power switch is turned on (READY).
Trouble Area | See Procedure |
ABS warning light circuit (Remains on) |
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ABS warning light circuit (Does not come on) |
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Brake warning light / red (malfunction) circuit (Remains on) |
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Brake warning light / red (malfunction) circuit (Does not come on) |
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Brake warning light / yellow (minor malfunction) circuit (Remains on) |
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Brake warning light / yellow (minor malfunction) circuit (Does not come on) |
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Slip indicator light circuit (Remains on) |
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Slip indicator light circuit (Does not come on) |
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SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When Using the Intelligent Tester) |
Procedure to enter the Test Mode
Turn the power switch off.
Check that the steering wheel is centered.
Check that the parking brake is released.
Check that park (P) is selected.
Connect the intelligent tester to the DLC3.
Turn the power switch on (IG).
Turn the intelligent tester on.
Switch the skid control ECU to Test Mode using the intelligent tester. Enter the following menus: Chassis / ABS/VSC/TRC / Signal Check.
Check that the ABS warning, brake warning / yellow (minor malfunction) and slip indicator lights come on for several seconds and then blink in Test Mode.
Check the ABS sensors.
Acceleration Sensor Check
Keep the vehicle stationary on a level surface for 1 second or more.
Master Cylinder Pressure Sensor Check
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 greater than 98 N (10 kgf, 22.0 lbf) for 1 second.
Check that the ABS warning light stays on for 3 seconds.
Speed Sensor Check
Drive the vehicle straight-ahead.
Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds and check that the ABS warning light goes off.
Stop the vehicle.
Check the VSC sensor.
Yaw Rate Sensor Zero Point Voltage Check
Check that park (P) is selected.
Keep the vehicle stationary on a level surface for 1 second or more.
Check that the brake warning / yellow (minor malfunction) light blinks.
Yaw Rate Sensor Output Check
Move the shift lever from P to D 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 push the P position switch. Check that the skid control buzzer sounds for 3 seconds.
End of Sensor Check
If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle is stopped and goes off while the vehicle is driving.
Read Sensor Check DTCs
Read the DTC(s) by following the intelligent tester screen.
Turn the power switch off and disconnect the intelligent tester.
Sensor Check DTCs
DTC Code | Detection Item | Trouble Area |
C1271 | Low Output Signal of Front Speed Sensor RH |
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C1272 | Low Output Signal of Front Speed Sensor LH |
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C1273 | Low Output Signal of Rear Speed Sensor RH |
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C1274 | Low Output Signal of Rear Speed Sensor LH |
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C1275 | Abnormal Change in Output Signal of Front Speed Sensor RH |
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C1276 | Abnormal Change in Output Signal of Front Speed Sensor LH |
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C1277 | Abnormal Change in Output Signal of Rear Speed Sensor RH |
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C1278 | Abnormal Change in Output Signal of Rear Speed Sensor LH |
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C1279 | Acceleration Sensor Output Voltage Malfunction |
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C1281 | Master Cylinder Pressure Sensor Output Malfunction |
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DTC Code | Detection Item | Trouble Area |
C0371 | Yaw Rate Sensor |
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DTC Code | Detection Item | Trouble Area |
C1346 | Stroke Sensor Zero Point Learning Malfunction |
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SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When not Using the Intelligent Tester) |
Procedure to enter Test Mode
Turn the power switch off.
Check that the steering wheel is centered.
Check that the parking brake is released.
Check that park (P) is selected.
Using SST, connect terminals TS and CG of the DLC3.
*1 | Front view of DLC3 |
Turn the power switch on (IG).
Check that the ABS warning, brake warning / yellow (minor malfunction) and slip indicator lights come on for several seconds and then blink in Test Mode.
Check the ABS sensors.
Acceleration Sensor Check
Keep the vehicle stationary on a level surface for 1 second or more.
Master Cylinder Pressure Sensor Check
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 greater than 98 N (10 kgf, 22.0 lbf) for 1 second.
Check that the ABS warning light stays on for 3 seconds.
Speed Sensor Check
Drive the vehicle straight-ahead.
Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds and check that the ABS warning light goes off.
Stop the vehicle.
Check the VSC sensor.
Yaw Rate Sensor Zero Point Voltage Check
Check that park (P) is selected.
Keep the vehicle stationary on a level surface for 1 second or more.
Check that the brake warning / yellow (minor malfunction) light blinks.
Yaw Rate Sensor Output Check
Move the shift lever from P to D 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 push the P position switch. Check that the skid control buzzer sounds for 3 seconds.
End of Sensor Check
If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle is stopped and goes off while the vehicle is driving.
Read Sensor Check DTCs
Using SST, connect terminals TC and CG of the DLC3.
*1 | Front view of DLC3 |
Count the number of blinks of the ABS warning, brake warning / yellow (minor malfunction) and slip indicator lights.
After performing the check, disconnect SST from terminals TS and CG, and TC and CG of the DLC3 and turn the power switch off.
Sensor Check DTCs
DTC Code | Detection Item | Trouble Area |
71 | Low Output Signal of Front Speed Sensor RH |
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72 | Low Output Signal of Front Speed Sensor LH |
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73 | Low Output Signal of Rear Speed Sensor RH |
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74 | Low Output Signal of Rear Speed Sensor LH |
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75 | Abnormal Change in Output Signal of Front Speed Sensor RH |
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76 | Abnormal Change in Output Signal of Front Speed Sensor LH |
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77 | Abnormal Change in Output Signal of Rear Speed Sensor RH |
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78 | Abnormal Change in Output Signal of Rear Speed Sensor LH |
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79 | Acceleration Sensor Output Voltage Malfunction |
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81 | Master Cylinder Pressure Sensor Output Malfunction |
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DTC Code | Detection Item | Trouble Area |
71 | Yaw Rate Sensor |
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DTC Code | Detection Item | Trouble Area |
71 | Stroke Sensor Zero Point Learning Malfunction |
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