STEERING SYSTEM SECTION ST CONTENTS STEERING ST-1 PRECAUTION... 2 PREPARATION... 3 BASIC INSPECTION... 4 SYMPTOM DIAGNOSIS... 6

Transcription

1 RG ST RG SY TTS RUT... 2 RUTS... 2 recaution for Supplemental Restraint System (SRS) "R G" and "ST T R-T- SR"...2 Service otice or recautions for Steering System...2 RRT... 3 RRT... 3 Special Service Tools...3 ommercial Service Tools...3 S ST... 4 RG W... 4 nspection...4 SYT GSS... 6 S, VRT RSSS (V) TRUSTG... 6 V Troubleshooting hart...6 R T... 7 RG W... 7 nspection...7 RV T... 8 RG W... 8 xploded View... 8 Removal and nstallation... 8 RG U... 9 xploded View... 9 Removal and nstallation... 9 nspection...10 RG ST...12 xploded View...12 Removal and nstallation...12 nspection...13 RG GR G...14 xploded View...14 Removal and nstallation...15 isassembly and ssembly...16 nspection...17 SRV T STS (SS)...19 SRV T STS (SS)...19 General Specifications...19 Steering Wheel...19 Steering ngle...19 Steering olumn...19 Steering Gear and inkage

2 < RUT > RUT RUTS RUTS recaution for Supplemental Restraint System (SRS) "R G" and "ST T R-TSR" : The Supplemental Restraint System such as R G and ST T R-TSR, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. nformation necessary to service the system safely is included in the SRS R G and ST T of this Service anual. WRG: lways observe the following items for preventing accidental activation. To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision that would result in air bag inflation, all maintenance must be performed by an authorized SS/T dealer. mproper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. or removal of Spiral able and ir ag odule, see SRS R G. ever use electrical test equipment on any circuit related to the SRS unless instructed to in this Service anual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. RUTS W USG WR TS (R R TR) RS WRG: lways observe the following items for preventing accidental activation. When working near the ir ag iagnosis Sensor Unit or other ir ag System sensors with the ignition or engine running, never use air or electric power tools or strike near the sensor(s) with a hammer. eavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury. When using air or electric power tools or hammers, always switch the ignition, disconnect the battery, and wait at least 3 minutes before performing any service. Service otice or recautions for Steering System : n case of removing steering gear assembly, make the final tightening with grounded and unloaded vehicle condition, and then check wheel alignment. bserve the following precautions when disassembling. - efore disassembly, thoroughly clean the outside of the unit. - isassembly should be done in a clean work area. t is important to prevent the internal parts from becoming contaminated by dirt or other foreign matter. - or easier and proper assembly, place disassembled parts in order on a parts rack. - Use nylon cloth or paper towels to clean the parts; common shop rags can leave lint that might interfere with their operation. - ever reuse non-reusable parts. - efore assembling, apply the specified grease to the directed parts. uring quick steering, rasping noise may be heard from around the steering wheel. This is not a malfunction. The noise is an operating noise of the S system under normal conditions. f the rasping noise occurs during slow steering, this may not be an operating noise of the system. n this case, it is necessary to find out the location of the noise and repair, if necessary. ever repeat static steering. (otor and S control unit could be heated.) -2

3 < RRT > RRT RRT RRT Special Service Tools : The actual shapes of ent-oore tools may differ from those of special service tools illustrated here. Tool number (ent-oore o.) Tool name ( ) Steering wheel puller escription Removing steering wheel 3127S000 ( ) reload gauge ZZ0819 easuring steering column rotating torque ZZ0806 V ( ) oot band crimping tool nstalling boot clamp (large diameter) ZZ1229 ommercial Service Tools : Tool name escription all joint remover Removing steering outer socket S-T146 ower tool oosening bolts and nuts

4 < S ST > S ST RG W nspection RG W : UTR RG W 1. ake sure that steering gear assembly, steering column assembly and steering wheel are installed in the correct position. 2. erform neutral position inspection after wheel alignment. Refer to SU-6, "nspection". 3. Set vehicle to the straight-ahead position and confirm steering wheel is in the neutral position. 4. oosen outer socket lock nut and turn inner socket to left and right equally to make fine adjustments if steering wheel is not in the neutral position. RG W TURG R 1. ark vehicle on a level and dry surface, set parking brake. 2. Tires need to be inflated normal pressure. Refer to WT-50, "Tire ir ressure". 3. Start engine. 4. heck steering wheel turning force when steering wheel has been turned 360 from neutral position. Steering wheel turning force : Refer to -19, "Steering Wheel". : 185 mm (7.28 in) T: ultiply the distance from the hook of spring balance to the center of steering wheel by the measurement value with a spring balance. RT W TURG G 1. heck front wheel turning angle after toe-in inspection. Refer to SU-6, "nspection". 2. lace front wheels on turning radius gauges and rear wheels on stands, so that vehicle can be level. 3. heck the maximum inner and outer wheel turning angles for and R road wheels. SG0027ZZ With the engine at idle, turn steering wheel from full left stop to full right stop and measure the turning angles. nner wheel (ngle: ) uter wheel (ngle: ) : Refer to -19, "Steering ngle". : Refer to -19, "Steering ngle". SG0055-4

5 < S ST > RG W 5. heck the following items when turning angle is out of the standard. a. heck rack stroke (). Rack stroke neutral position () : Refer to -19, "Steering Gear and inkage". b. f rack stroke is out of specification, replace steering gear assembly. Steering angles are not adjustable. heck steering gear SG0272ZZ assembly, steering column assembly, and front suspension components for wear or damage if any of the turning angles are different from the specified value. Replace any of them, if any non-standard condition exists. -5

6 S, VRT RSSS (V) TRUSTG < SYT GSS > SYT GSS S, VRT RSSS (V) TRUSTG V Troubleshooting hart Use the chart below to find the cause of the symptom. f necessary, repair or replace these parts. : Reference -17, "nspection" -17, "nspection" -17, "nspection" -7, "nspection" -7, "nspection" -14, "xploded View" -10, "nspection" -9, "xploded View" -14, "xploded View" V in X, RX, SU, RSU section V in WT section V in WT section V in X section V in R section ossible cause and SUST RTS uter/inner socket ball joint swinging torque uter/inner socket ball joint rotating torque uter/inner socket ball joint end play Steering wheel play mproper steering wheel mproper installation or looseness of tilt lock lever ounting looseness Steering column deformation or damage mproper installation or looseness of steering column Steering linkage looseness X and SUSS TR R W RV ST R Symptom : pplicable Steering oise Shake Vibration Shimmy udder -6

7 < R T > R T RG W nspection RG W : RG W X Y 1. heck installation conditions of steering gear assembly, front suspension assembly, axle and steering column assembly. 2. heck if movement exists when steering wheel is moved up and down, to the left and right and to the axial direction. Steering wheel axial end play 3. heck the following items when steering wheel axial end play is out of the standard. heck the steering column assembly mounting condition. Refer to -9, "xploded View". heck steering gear assembly mounting condition for looseness. Refer to -14, "xploded View". RG W Y : Refer to -19, "Steering Wheel". 1. Turn steering wheel so that front wheels come to the straight-ahead position. 2. Start engine and lightly turn steering wheel to the left and right until front wheels start to move. 3. easure steering wheel movement on the outer circumference. Steering wheel play on the : Refer to -19, "Steering Wheel". outer circumference 4. heck the following items when steering wheel play is out of the standard. heck backlash for each joint of steering column assembly. heck installation condition of steering gear assembly. -7

8 < RV T > RG W RV T RG W xploded View : SG0704G 1. Steering wheel : lways replace after every disassembly. : m (kg-m, ft-lb) Removal and nstallation : RV T: When reconnecting spiral cable, fix cable with a tape so that fixing case and rotating part keep aligned. This will omit neutral position alignment procedure during spiral cable installation. 1. Set vehicle to the straight-ahead position. 2. Remove driver air bag module. Refer to SR-10, "Removal and nstallation". 3. Remove steering wheel lock nut after steering is locked. 4. Remove steering wheel with the steering wheel puller () [S: ( )]. T: ut paint marks on the steering wheel and the column shaft head for supporting accurate positioning during the installation procedure. SG1524 T ote the following, and install in the reverse order of removal. heck the spiral cable neutral position after replacing or rotating spiral cable. Refer to SR-13, "Removal and nstallation". ever twist spiral cable excessively after it becomes tight. (Twisting may cause the cable to be torn off.) ever reuse steering wheel lock nut. -8

9 < RV T > RG U xploded View RG U : G0173G 1. over 2. Sub-harness 3. and 4. Steering column assembly 5. Slide plate (inner) 6. Slide plate (outer) 7. racket : lways replace after every disassembly. : m (kg-m, ft-lb) : m (kg-m, in-lb) Removal and nstallation : RV While removing the steering column assembly, never unlock the tilt lever. ever impact on the axis when removing steering column assembly. e careful when removing steering column assembly from the vehicle because it is heavy. eep steering column assembly away from magnetic sources. ever disassemble steering column assembly. t is not separable. While removing the steering column assembly, never move the steering gear. When removing the steering column assembly, be careful not to allow the intermediate shaft to turn. 1. Set vehicle to the straight-ahead position. 2. lace the tilt to the lowest level. 3. Remove instrument lower panel. Refer to -12, "Removal and nstallation". 4. Remove driver air bag module. Refer to SR-10, "Removal and nstallation". 5. Remove steering wheel. Refer to -8, "Removal and nstallation". 6. Remove steering column cover. Refer to -12, "Removal and nstallation". 7. Remove spiral cable. Refer to SR-13, "Removal and nstallation". 8. Remove combination switch. Without intelligent key system: Refer to S-142, "Removal and nstallation". With intelligent key system: Refer to S-81, "Removal and nstallation". 9. isconnect each switch harness connectors installed to steering column assembly. 10. Remove intermediate shaft mounting bolt (steering column side), and separate intermediate shaft from steering column assembly. Refer to -12, "Removal and nstallation". -9

10 < RV T > RG U lace a matching mark on both intermediate shaft and steering column assembly before removing intermediate shaft. When removing intermediate shaft, never insert a tool, such as a screwdriver, into the yoke groove to pull out the intermediate shaft. n case of the violation of the above, replace intermediate shaft with a new one. 11. isconnect S control unit connectors. 12. Remove steering column assembly. When removing the mounting, be careful not to drop the steering column assembly. 13. Remove slide plate (outer and inner) from steering column assembly. 14. Remove cover, sub-harness, band, and bracket from steering column assembly. Remove cover, sub-harness, band, and bracket only when necessary. 15. erform inspection after removal. Refer to -10, "nspection". T ever impact on the axis when removing steering column assembly. When installing the steering column cover, check that the vehicle harness is not stuck in the cover. ote the following, and install in the reverse order of removal. fter tightening mounting nut () of the steering column assembly, press in slide plate (outer and inner) (1) to tighten mounting nut (). The slide plate must be securely pressed in before tightening the nut of slide plate (outer, inner). or intermediate shaft mounting bolt direction, refer to -12, "xploded View". (o not insert it from the other side.) ever reuse intermediate shaft mounting bolt. SG0837ZZ When connecting intermediate shaft upper side (1) and column shaft, make sure the bolt is securely seated in groove () of column shaft () before final tightening. fter installing steering column assembly, perform self-diagnosis with SUT to ensure correct operation. Refer to -9, "SUT unction". ever reuse band. erform inspection after installation. Refer to -10, "nspection". nspection SG1295 : ST TR RV heck each part of steering column assembly for damage or other malfunctions. Replace if there are any abnormal conditions. -10

11 < RV T > RG U easure steering column assembly rotating torque using a preload gauge () [S: 3127S000 ( )]. Replace steering column assembly if the rotating torque is outside the standard. Rotating torque : Refer to -19, "Steering olumn". easure the length shown in the figure, if vehicle has been involved in a minor collision. Replace steering column assembly (with motor, reduction gear, sensor) if is outside the standard. G0085ZZ Steering column length () : Refer to -19, "Steering olumn". G0174ZZ ST TR T heck each part of steering column assembly for damage or other malfunctions. Replace if there are any abnormal conditions. heck the steering wheel play, neutral position steering wheel, steering wheel turning force, and front wheel turning angle. Refer to -7, "nspection". heck tilt mechanism operating range T shown in the figure. Tilt operating range (T) : Refer to -19, "Steering olumn". djust neutral position of steering angle sensor. Refer to R-56, "Work rocedure". G0175ZZ -11

12 < RV T > RG ST xploded View RG ST : G0172G 1. ash seal 2. Guide * 3. ntermediate shaft : Vehicle front : lways replace after every disassembly. : m (kg-m, ft-lb) *: f reinstalling, this part is not required. Removal and nstallation : RV Spiral cable may be cut if steering wheel turns while separating steering column assembly and steering gear assembly. e sure to secure steering wheel using string to avoid turning. 1. Set vehicle to the straight-ahead position. 2. lace the tilt to the lowest level. 3. Remove instrument lower panel. Refer to -12, "Removal and nstallation". 4. Remove intermediate shaft mounting bolt (steering gear side), and separate intermediate shaft from steering gear assembly. lace a matching mark on both intermediate shaft and steering gear assembly before removing intermediate shaft. When removing intermediate shaft, never insert a tool, such as a screwdriver, into the yoke groove to pull out the intermediate shaft. n case of the violation of the above, replace intermediate shaft with a new one. 5. Remove intermediate shaft mounting bolt (steering column side), and remove intermediate shaft from steering column assembly. lace a matching mark on both intermediate shaft and steering column assembly before removing intermediate shaft. When removing intermediate shaft, never insert a tool, such as a screwdriver, into the yoke groove to pull out the intermediate shaft. n case of the violation of the above, replace intermediate shaft with a new one. 6. Remove dash seal from vehicle. 7. Remove guide from intermediate shaft. -12

13 < RV T > RG ST Remove guide only when necessary. 8. erform inspection after removal. Refer to -13, "nspection". T Spiral cable may be cut if steering wheel turns while separating steering column assembly and steering gear assembly. e sure to secure steering wheel using string to avoid turning. ote the following, and install in the reverse order of removal. To install dash seal (1) to the vehicle, insert dash seal into the steering gear assembly and press in the protrusions () by hand. ever allow dash seal lip to run off the engine room side or passenger room side. ollow the instructions below to install intermediate shaft to steering gear assembly. - nsert intermediate shaft into steering gear assembly. lign groove of the steering gear assembly with the bolt hole of the intermediate shaft. The guide protrusion is not required to be reinstalled. G0092ZZ - heck for galling while hand-tightening the mounting bolt of intermediate shaft (steering gear assembly side). fter checking that the bolt is inserted in the groove of steering gear assembly, tighten the bolt to the specified torque. or intermediate shaft mounting bolt direction, refer to -12, "xploded View". (o not insert it from the other side.) ever reuse intermediate shaft mounting bolt. When connecting intermediate shaft upper side (1) and column shaft, make sure the bolt is securely seated in groove () of column shaft () before final tightening. fter installing steering column assembly, perform self-diagnosis with SUT to ensure correct operation. Refer to -9, "SUT unction". erform inspection after installation. Refer to -13, "nspection". nspection SG1295 : ST TR RV heck each part of intermediate shaft for damage or other malfunctions. Replace if there are any abnormal conditions. ST TR T heck each part of intermediate shaft for damage or other malfunctions. Replace if there are any abnormal conditions. Rotate steering wheel to check for decentered condition, binding, noise, or excessive steering effort. heck the steering wheel play, neutral position steering wheel, steering wheel turning force, and front wheel turning angle. Refer to -7, "nspection", -4, "nspection". djust neutral position of steering angle sensor. Refer to R-56, "Work rocedure". -13

14 RG GR G < RV T > RG GR G xploded View : RV G0143G 1. Steering gear assembly 2. eat insulator* 3. ront suspension member : Vehicle front : lways replace after every disassembly. : m (kg-m, ft-lb) : m (kg-m, in-lb) : The placement of this part depends on production timing. Reinstallation is not required after removal. SSSY -14

15 < RV T > RG GR G G0145G 1. uter socket 2. oot clamp (small diameter) 3. oot 4. oot clamp (large diameter) 5. Gear housing assembly 6. ust cover 1: pply Genuine ithium Soap, utorex (manufactured by yodo yushi) or equivalent. 2: pply Genuine ithium Soap, Wanlouver o.2 (manufactured by yodo yushi) or equivalent. : lways replace after every disassembly. : m (kg-m, ft-lb) Removal and nstallation : RV 1. Set vehicle to the straight-ahead position. 2. Remove intermediate shaft mounting bolt (steering gear assembly side). Refer to -9, "Removal and nstallation". Spiral cable may be cut if steering wheel turns while separating steering column assembly and steering gear assembly. lways fix the steering wheel using string to avoid turning. lace a matching mark on both intermediate shaft and steering gear assembly before removing intermediate shaft. When removing intermediate shaft, never insert a tool, such as a screwdriver, into the yoke groove to pull out the intermediate shaft. n case of the violation of the above, replace intermediate shaft with a new one. 3. Remove dash seal from vehicle. Refer to -12, "Removal and nstallation". 4. Remove tires with power tool. Refer to WT-43, "Removal and nstallation". -15

16 RG GR G < RV T > 5. Remove steering outer socket from steering knuckle so as not to damage ball joint boot using suitable ball joint remover (commercial service tool). Temporarily tighten the nut to prevent damage to threads and to prevent the ball joint remover from sudden drop turning. 6. Remove front suspension member. Refer to SU-16, "Removal and nstallation". 7. Remove steering gear assembly. T ote the following, and install in the reverse order of removal. Spiral cable may be cut if steering wheel turns while separating steering column assembly and steering gear assembly. lways fix the steering wheel using string to avoid turning. erform final tightening of nuts and bolts on each part under unladen conditions with tires on level ground when removing steering gear assembly. heck wheel alignment. Refer to SU-6, "nspection". Rotate steering wheel to check for decentered condition, binding, noise or excessive steering effort. ever reuse steering outer socket mounting nut and steering gear assembly mounting nut. erform inspection after installation. Refer to -17, "nspection". isassembly and ssembly : SSSY 1. oosen outer socket lock nut, and remove outer socket. When loosening lock nut, be sure to fix outer socket with a wrench or an equivalent. 2. Remove boot clamps, and then remove boot from inner socket. ever damage inner socket part and gear housing part of steering gear assembly when removing boot. steering gear assembly must be replaced if steering gear assembly are damaged because it may cause foreign material interfusion. 3. Remove dust cover. 4. erform inspection after disassembly. Refer to -17, "nspection". SSY 1. pply recommended grease to the entire inner perimeter () of the dust cover lip and contact surface () of the gear housing part, and install dust cover to steering gear assembly. Use Genuine ithium Soap, Wanlouver o.2 (manufactured by yodo yushi) or equivalent. SG0184 G0103ZZ -16

17 < RV T > RG GR G 2. pply recommended grease to inner socket () of gear housing assembly and install boot to gear housing assembly. Use Genuine ithium Soap, utorex (manufactured by yodo yushi) or equivalent. ever reuse boot. Grease application position (Reference) : 10 mm (0.39 in) 3. nstall boot clamp (large diameter) (1) to boot using boot band crimping tool () [S: V ( )]. ever reuse boot clamp (large diameter). nstall boot clamp (large diameter) (1) securely to boot groove, and crimp it so as to have clearance () of 3 mm (0.12 in) or less as shown. 4. nstall boot clamp (small diameter) to boot. ever reuse boot clamp (small diameter). 5. djust inner socket to standard length (), and then tighten lock nut (1) to the specified torque. heck length again after tightening lock nut. G0102ZZ SG0140ZZ nner socket length () : Refer to -19, "Steering Gear and inkage". When tightening the lock nut (1), be sure to fix outer socket (2) with a wrench or an equivalent to prevent the ball joint from getting contact with the knuckle. djust toe-in after this procedure. The length achieved after toe-in adjustment is not necessary the above value. G0187ZZ nspection SG0538ZZ : ST TR SSSY oot heck boot for cracks, and replace it if a malfunction is detected. Gear housing assembly heck gear housing assembly for damage and scratches. Replace if there are any abnormal conditions. uter Socket and nner Socket heck the following items and replace the component if it does not meet the standard. -17

18 RG GR G < RV T > T SWGG R ook a spring balance at the point shown in the figure and pull the spring balance. ake sure that the spring balance reads the specified value when ball stud and inner socket start to move. Replace outer socket or steering gear assembly (inner socket) if they are outside the standard. uter socket (easuring point of outer socket: all stud upper side) : Refer to -19, "Steering Gear and inkage". nner socket (easuring point of inner socket: * mark shown in the figure) : Refer to -19, "Steering Gear and inkage". SG0896 T X Y pply an axial load of 490 (50 kg, 110 lb) to ball stud. Using a dial gauge, measure amount of stud movement, and then make sure that the value is within the following specified range. Replace outer socket (1) steering gear assembly (inner socket) (2) if the measured value is outside the standard. uter socket nner socket : Refer to -19, "Steering Gear and inkage". : Refer to -19, "Steering Gear and inkage". SG0109ZZ ST TR T heck if steering wheel turns smoothly when it is turned several times fully to the end of the left and right. heck the steering wheel play, neutral position steering wheel, steering wheel turning force, and front wheel turning angle. Refer to -7, "nspection". djust neutral position of steering angle sensor. Refer to R-56, "Work rocedure". -18

19 SRV T STS (SS) < SRV T STS (SS) SRV T STS (SS) SRV T STS (SS) General Specifications : Steering gear model Steering Wheel R25 : tem Standard Steering wheel axial end play Steering wheel play on the outer circumference 0 mm (0 in) 0-35 mm ( in) Steering wheel turning force 36 (3.7 kg-f, 8.09 lb-f) or less Steering ngle : Unit: egree minute (ecimal degree) tem Standard inimum (33.0 ) nner wheel ominal (36.0 ) aximum (37.0 ) uter wheel ominal (31.0 ) Steering olumn : Tilt operating range * Rotating torque Steering column length * *: or measuring position, refer to -10, "nspection". Steering Gear and inkage tem Rack stroke neutral position nner socket length Spring balance measurement * uter socket ball joint xial end play Spring balance measurement * nner socket ball joint xial end play *: or measuring position, refer to -17, "nspection" mm (1.575 in) m ( kg-m, 0 2 in-lb) mm ( in) Standard 68 mm (2.68 in) 83.5 mm (3.287 in) ( kg-f, lb-f) 0.5 mm (0.020 in) or less ( kg-f, lb-f) 0.2 mm (0.008 in) or less :