Adjustment
After or before servicing the EPS system, perform the troubleshooting and test procedure as follows. Compare the system condition with normal condition in the table below and if abnormal symptom is detected, perform necessary remedy and inspection.
| Test condition | Normal condition: Motor must not supply steering assist. |
|---|
| Symptom | Possible cause | Remedy |
| IG Off | Motor supplies steering assist. | ASP is not calibrated. | Perform the ASP calibration using a scan tool. |
| IG power supplies | Inspect the IG power supply line. |
| Test condition | Normal condition: Motor must not supply steering assist, Warning lamp is illuminated. |
|---|
| Symptom | Possible cause | Remedy |
| IG On/Engine Off | Motor supplies steering assist. | ASP is not calibrated. | Perform the ASP calibration using a scan tool. |
| EMS CAN signal is not received. | Inspect the CAN line. |
| Warning lamp is not illuminated. | Cluster fault | Inspect the cluster and cluster harness |
| Test condition | Normal condition: Motor supplies steering assist, Warning lamp is not illuminated. |
|---|
| Symptom | Possible cause | Remedy |
| IG On/Engine ON | Warning lamp is illuminated and Motor dose not supply steering assist. | EPS (Hot at all times) and IG power supply fault | Inspect the connector and harness for EPS (Hot at all times) and IG power supply line. |
| DTC is detected by system. | Perform the self test using a scan tool and repair or replace. |
| Warning lamp is illuminated and Motor supplies steering assist. | ASP is not calibrated. | Perform the ASP calibration using a scan tool. |
| CAN communication between EPS and cluster is fault. | Inspect the CAN line. |
| ASP: Absolute Steering Position CAN: Controller Area Network EMS: Engine Management System |
| CAUTION | The following symptoms may occur during normal vehicle operation and if there is no EPS warning light illumination, it is not malfunction of EPS system. After turning the ignition switch on, the steering wheel becomes heavier while it performs EPS system diagnostics, for about 2 seconds, then it becomes normal steering condition. After turning the ignition switch on or off, EPS relay noise may occur but it is normal. When it is steered, while the vehicle is stopped or in low driving speed, motor noise may occur but it is normal operating one. |
Caution when ASP (Absolute Steering Position) calibration or EPS type recognition
- Check if the battery is fully charged before ASP calibration or EPS type recognition.
- Be careful not to disconnect any cables connected to the vehicle or scan tool during ASP calibration or EPS type recognition.
- When the ASP calibration or EPS type recognition is completed, turn the ignition switch off and wait for several seconds, then start the engine to confirm normal operation of the vehicle.
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Scheme 16: ASP Calibration
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- Select "Steering Angle Sensor".
- Proceed with the test according to the screen introductions.
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Scheme 18: EPS Type Recognition Procedure
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- Select "EPS Variant Coding".
- Proceed with the test according to the screen introductions.
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- Remove the front wheel & tire. Tightening torque: 88.3 ~ 107.9N.m(9.0 ~ 11.0kgf.m, 65.1 ~ 79.6lb-ft) CAUTION: Be careful not to damage to the hub bolts when removing the front wheel & tire.
- Disconnect the stabilizer link (B) with the front strut assembly (A) after loosening the nut. Tightening torque: 98.1 ~ 117.7N.m(10.0 ~ 12.0kgf.m, 72.3 ~ 86.8lb-ft)
- Loosen the nut and then remove the tie-rod end (A) from the front axle by using SST(09568-34000). Tightening torque: 23.5 ~ 33.3N.m(2.4 ~ 3.4kgf.m, 19.4 ~ 24.6lb-ft)
- Loosen the nut and then remove the lower arm (A). Tightening torque: 78.5 ~ 88.3N.m(8.0 ~ 9.0kgf.m, 57.9 ~ 65.1lb-ft)
- Loosen the bolt (A) and then disconnect the universal joint assembly from the pinion of the steering gear box. Tightening torque: 32.4 ~ 37.3N.m(3.3 ~ 3.8kgf.m, 23.9 ~ 27.5lb-ft) CAUTION: Lock the steering wheel in the straight ahead position to prevent the damage of the clock spring inner cable when you handle the steering wheel. Must be replaced with new bolts when assembling. (SEAL-LOCK has been processed) SEAL-LOCK Specifications: MS721-39 "TYPE-D" Product: ND industries 1193S
- Remove the rubber hanger (A).
- Loosening the roll rod (A) mounting bolts and nuts. Tightening torque: 53.9 ~ 63.7N.m(5.5 ~ 6.5kgf.m, 39.8 ~ 47.0lb-ft)
- Loosen the bolts & nuts and then remove the front sub frame (A). Tightening torque: Sub frame mounting bolt & nut 156.9 ~ 176.5N.m(16.0 ~ 18.0kgf.m, 115.7 ~ 130.2lb-ft) Sub frame stay mounting bolt 44.1 ~ 53.9N.m(4.5 ~ 5.5kgf.m, 32.5 ~ 39.8lb-ft)
- Remove steering gearbox (A) from the front sub frame by loosening the mounting bolts. Tightening torque: 58.8 ~ 78.8N.m (6.0 ~ 8.0kgf.m, 43.4 ~ 57.9lb-ft)
- Installation is the reverse of the removal.
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- Fix the steering gear box assembly (A) on the vice.
- Remove the bellows clip (A) in the direction of the arrow. (The left and right same work.)
- Give space to bellows bend (B) by using the ring pliers (A). (The left and right same work)
- After making the space to the bellows and tie-rod end contact part by using the (-) driver, remove the bellows (A) in the direction of the arrow. (The left and right same work)
- Remove the tie-rod & tie-rod end assembly (A). (The left and right same work)
- After fixing the yoke plug (A), remove the rock nut (B).
- Remove the yoke plug (A).
- Remove the yoke spring (A) and leaf spring (B). NOTE: Note that there may be urethane pads or back side of O-ring in place of leaf spring. The number of leaf spring can be differs from depending on vehicle.
- Remove the support yoke assembly (A) from the inner lack hosing. NOTE: In case of support yoke assembly (A), the number and availability of O-ring can differ from depending on vehicle.
- Remove the dust packing & cap (A).
- Remove the top plug (A) by using the spanner. CAUTION: When removing the top plug, top plug is made of aluminum, so be careful to avoid distortion.
- Remove the pinion assembly (A).
- Remove the rack bar (A) in the direction of the arrow.
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- After spreading grease on the rack bar gear part (A), install rack bar (B) in the direction of the arrow. CAUTION: When inserting the rack bar, be careful not to damage to inner rack housing.
- After spreading grease on the pinion gear part, install the pinion assembly (A).
- After spreading three bond (Loctite) on the top plug (A) thread, install the top plug by using the spanner. CAUTION: When installing the top plug, top plug is made of aluminum, so be careful to avoid distortion.
- Install the dust packing & cap (A).
- Install the support yoke (A). CAUTION: Before installing the support yoke assembly, make sure to whether the O-ring damage.
- Install the Yoke plug (A) and leaf spring (B). CAUTION: The number of leaf spring can differ from depending on vehicle, pay attention to direction. Direction of leaf spring
- After spreading three bond (Loctite) on the Yoke plug (A) thread, install the Yoke plug.
- Adjust Yoke with reference to the "How to adjust Yoke". (Refer to " ( «ADJUSTMENT»(ref-536086-S38641878362013031400000) )" in ST group)
- After fixing the yoke plug, install the lock nut (A).
- Install the tie-rod & tie-rod end assembly (A). (The left and right same work)
- Caulk (A) the rack bar and tie-rod assembly joints. (The left and right same work) CAUTION: When you doing caulking, use the air tool or chisel.
- After spreading sealant on the rack hosing and the bellow joints (A), install the bellows (B) in the direction of the arrow.
