Kia Optima: ESC (Electronic Stability Control) System / Rear Wheel Speed Sensor
Components and components location
1. Rear wheel speed sensor
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2. Rear wheel speed sensor connector
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Repair procedures
1. |
Disconnect the (-) battery terminal.
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2. |
Remove the rear wheel and tire.
(Refer to Suspension System - "Wheel")
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3. |
Remove the rear brake disc.
(Refer to Brake System - "Rear Brake Disc")
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4. |
Disconnect the rear wheel speed sensor connector (A).
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5. |
Remove the hub assembly and dust cover (A) after loosening the mounting
bolts.
Tightening torque :
88.3 - 107.9 N.m (9.0 - 11.0 kgf.m, 65.1 - 79.6 lb-ft)
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Be careful not to drop the rear hub assembly when loosening the
bolts.
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Rear Wheel Speed Sensor
Cap
1. |
Remove the rear wheel hub bearing assembly.
(Refer to Driveshaft and axle - "Rear Axle Assembly")
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2. |
Fix the rear hub bearing assembly (A) on the vise.
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When placing on the vise, use a cloth not to be damaged
the hub bearing assembly.
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•
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Be careful not to use excessive force on the vise may
damage the hub bearing assembly.
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3. |
Check the direction of the sensor cap (A).
Before removing the sensor cap, check the direction of the sensor
cap connector.
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4. |
Remove the sensor cap by hammering on a gap between sensor cap and hub
bearing assembly using a scraper (A).
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In order to widen the gap little by little, hammering
around the bearing cap 10-20 times.
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•
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When removing the sensor cap, remove it in a straight
direction not to damage the tone wheel or encoder.
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•
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Be careful not to damage the hub bearing assembly when
using the hammer.
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5. |
Check for distortion of damage of the tone wheel or encoder (A).
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Check if damaged the tone wheel or encoder after removing
the sensor cap and replace the hub bearing if it was deformed.
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•
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If the tone wheel is deformed, it may trigger the MIL
ON or other problems.
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6. |
Position the sensor cap to the same direction of sensor cap connector
(A) as you checked before removing.
Before installing the sensor cap, do not let any foreign material
and contaminant into the hub bearing assembly.
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7. |
Install the sensor cap (A) with the special service tool (09527-AL400).
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Be careful not to tilt to one side when installing the
sensor cap as it may damage the tone wheel or encoder.
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•
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When sensor cap installation, hammering it until the
gap disappeared between the sensor cap and hub bearing assembly.
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•
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Special Service Tools guide.
SST No.
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SST Inner diameter
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Sensor cap outer diameter
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09527-2W110
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Φ82.1
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Φ81.2, Φ81.4
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09527-1S010
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Φ58.9
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Φ58.4
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09527-AL100
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Φ60
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Φ59.5
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09527-AL200
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Φ65.9
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Φ65.3
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09527-AL300
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Φ67.4
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Φ67.2
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09527-AL400
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Φ73.2
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Φ72.6
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09527-AL500
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Φ87.2
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Φ86.6
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8. |
Install the rear wheel hub bearing assembly.
(Refer to Driveshaft and axle - "Rear Axle Assembly")
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1. |
Measure the output voltage between the terminal of the wheel speed sensor
and the body ground.
In order to protect the wheel speed sensor, when measuring output
voltage, a 100Ω resister must be used as shown.
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2. |
Compare the change of the output voltage of the wheel speed sensor to
the normal change of the output voltage as shown below.
V_low : 0.59V - 0.84V
V_high : 1.18V - 1.68V
Frequency range : 1 - 2,500 Hz
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1. |
Install in the reverse order of removal.
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✽ NOTICE
Maintenance Service and Record Retention are the owner's responsibility.
You should retain documents that show proper maintenance has been performed
on your vehicle in accordance with the scheduled maintenance service charts shown
on the following pages. You need this information to ...