Steering Column: Diagnosis Scion xA I

PROBLEM SYMPTOMS TABLE

Use the table below, with suspected areas listed in numerical order, to determine the cause of the problem. Inspect and repair or replace parts as necessary according to the steps on the following pages.

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1. CHECK STEERING WHEEL FREEPLAY Stop the vehicle and set the tires straight ahead. Turn the steering wheel gently right and left by hand, and check the steering wheel freeplay. Maximum freeplay: 30 mm (1.18 in.)

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1. STEERING OFF CENTER REPAIR PROCEDURE Inspect steering wheel off center. Apply masking tape on the top center of the steering wheel and steering column upper cover. Driving the vehicle on a straight line for 100 meters at a constant speed of 35 mph (56 km/h), and hold the steering wheel to maintain the course. Draw a line on the masking tape as shown in the illustration. Turn the steering wheel to its straight position. HINT: Refer to the upper surface of the steering wheel, steering spoke and SRS airbag line for the straight position. Draw a new line on the masking tape of the steering wheel as shown in the illustration. Measure the distance between the 2 lines on the masking tape of the steering wheel. Convert the measured distance to steering angle. Measured distance 1 mm (0.04 in.) = Steering angle approximately 1 degree. HINT: Make a note of the steering angle. Adjust steering angle. NOTE: The adjustment method for steering angle varies depending on the models. Check whether it is type A or B. Draw a line on the RH and LH tie rod and rack ends where it can easily be seen. Using a paper gauge, measure the distance from RH and LH tie rod ends to the rack end screws. HINT: Measure the RH side and LH side. Make a note of the measured values. Remove the RH and LH boot clips from the rack boots. Loosen the RH and LH lock nuts. Turn the RH and LH rack ends by the same amount (but in different directions) according to the steering angle. 1 turn 360 degrees of rack end (1.5 mm (0.059 in.) horizontal movement) to 12 degrees of steering angle. Tighten the RH and LH lock nuts by the specified torque. Torque: 74 N.m (755 kgf.cm, 55 ft.lbf) NOTE: Make sure that the difference in length between RH and LH tie rod ends and rack end screws are within 1.5 mm (0.059 in.). Reinstall the RH and LH boot clips.

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1. PRECAUTION (See AIR BAG RESTRAINT SYSTEM )
2. DISCONNECT BATTERY NEGATIVE TERMINAL (See AIR BAG RESTRAINT SYSTEM )
3. PLACE FRONT WHEELS FACING STRAIGHT AHEAD
4. REMOVE HORN BUTTON ASSY Place the front wheels facing straight ahead. Using a torx socket wrench (T30), loosen the 2 torx screws until the groove along the screw circumference catches on the screw case. Disconnect the horn connector. Remove the horn button assy from the steering wheel assy and support the horn button assy with one hand as shown in the illustration. NOTE: When removing the horn button assy, do not pull the airbag wire harness. Using a screwdriver, disconnect the horn button assy connectors. Remove the horn button assy. CAUTION: When storing the horn button assy, keep the upper surface of the pad facing upward. Never disassemble the horn button assy.
5. REMOVE STEERING WHEEL ASSY Disconnect the connector. Remove the steering wheel assy set nut. Put matchmarks on the steering wheel assy and main shaft assy. Using SST, remove the steering wheel assy. SST 09950-50013 (09951-05010, 09952-05010, 09953-05020, 09954-05021)
6. REMOVE STEERING COLUMN COVER Remove the 3 screws and the steering column cover LWR. Remove the 2 bolts and the steering column cover UPR.
7. DISCONNECT FLOOR SHIFT PARKING LOCK CABLE ASSY (A/T TRANSAXLE) With the key in the ACC position, disengage the claw and pull out the floor shift parking lock cable.
8. REMOVE SPIRAL CABLE SUB-ASSY (See AIR BAG RESTRAINT SYSTEM )
9. REMOVE HEADLAMP DIMMER SWITCH ASSY Disconnect the connector and remove the headlamp dimmer switch assy.
10. REMOVE WINDSHIELD WIPER SWITCH ASSY Disconnect the connector and remove the windshield wiper switch assy.
11. REMOVE STEERING COLUMN HOLE COVER PLATE Remove the clip and the steering column hole cover plate.
12. DISCONNECT STEERING INTERMEDIATE SHAFT ASSY Put matchmarks on the intermediate shaft and steering intermediate shaft assy. Remove the bolt, and then disconnect the steering intermediate shaft assy.
13. REMOVE STEERING INTERMEDIATE SHAFT ASSY Put matchmarks on the main shaft assy and steering intermediate shaft assy. Remove the bolt and the steering intermediate shaft assy.
14. REMOVE STEERING COLUMN ASSY Disconnect the connectors and wire harness clamps from the steering column assy. Remove the bolt and steering column assy.
15. REMOVE STEERING COLUMN UPPER W/SWITCH BRACKET ASSY Using a centering punch, mark the center of the 2 tapered-head bolts. Using a 3 to 4 mm (0.12 to 0.16 in.) drill, drill a hole in the 2 bolt heads. Using a screw extractor, remove the 2 bolts and steering column upper w/switch bracket assy.
16. REMOVE STEERING COLUMN CLAMP UPPER
17. REMOVE STEERING MAIN SHAFT BUSH Using a screwdriver and hammer, tap out the steering main shaft bush.
18. REMOVE STEERING MAIN SHAFT ASSY Using a snap ring expander, remove the snap ring on the upper side. Using an extension bar and hammer, remove the steering main shaft assy. Using a snap ring expander, remove the snap ring on the lower side.
19. REMOVE IGNITION SWITCH LOCK CYLINDER ASSY Place the ignition switch lock cylinder assy in the ACC position. Push down the stop pin with a screwdriver, and pull out the cylinder assy.
20. REMOVE UN-LOCK WARNING SWITCH ASSY Disconnect the un-lock warning switch assy connector from the ignition or starter switch assy. Remove the un-lock warning switch assy.
21. REMOVE IGNITION OR STARTER SWITCH ASSY Remove the 2 screws and ignition or starter switch assy from the steering column bracket assy.
22. INSTALL IGNITION OR STARTER SWITCH ASSY Install the ignition or starter switch assy to the steering column bracket assy with the 2 screws.
23. INSTALL UN-LOCK WARNING SWITCH ASSY Install the un-lock warning switch assy. Connect the un-lock warning switch assy connector to the ignition or starter switch assy. Using a new clamp, fix the wire harness of the unlock warning switch assy to the steering column bracket assy UPR as shown in the illustration. NOTE: When fixing the wire harness, do not tighten the camp too hard. It could damage the wire harness inside.
24. INSTALL IGNITION SWITCH LOCK CYLINDER ASSY Make sure that the ignition switch lock cylinder assy is in the ACC position. Install the ignition switch lock cylinder assy.
25. INSPECT STEERING LOCK OPERATION Check that the steering lock mechanism is activated when the key is removed. Check that the steering lock mechanism is deactivated when the key is inserted and turned to the ACC position.
26. INSTALL STEERING MAIN SHAFT ASSY Using a snap ring expander, install a new snap ring to the lower side. Install the steering main shaft assy. Using a snap ring expander, install a new snap ring to the upper side.
27. INSTALL STEERING MAIN SHAFT BUSH Coat a new steering main shaft bush with molybdenum disulfide lithium base grease. Using SST and a hammer, tap in the steering main shaft bush. SST 09612-22011
28. INSTALL STEERING COLUMN UPPER W/SWITCH BRACKET ASSY Temporarily install the steering column upper w/switch bracket assy and steering column clamp upper with 2 new steering lock set bolts. Tighten the 2 steering lock set bolts until the bolt heads break off.
29. INSTALL STEERING COLUMN ASSY Install the steering column assy from the front side, and install the steering column clamp to the instrumental reinforcement assy. Install the steering column assy with the bolt. Torque: 21 N.m (210 kgf.cm, 15 ft.lbf) Connect the connectors and wire harness clamps.
30. INSTALL STEERING INTERMEDIATE SHAFT ASSY Align the matchmarks on the main shaft assy and steering intermediate shaft assy. Install the steering intermediate shaft assy with the bolt. Torque: 28 N.m (286 kgf.cm, 21 ft.lbf) NOTE: Install the intermediate shaft assy with the distinction paint facing the steering column assy side.
31. CONNECT STEERING INTERMEDIATE SHAFT ASSY Align the matchmarks on the intermediate shaft and steering intermediate shaft assy. Connect the steering intermediate shaft assy with the bolt. Torque: 28 N.m (286 kgf.cm, 21 ft.lbf)
32. INSTALL STEERING COLUMN HOLE COVER PLATE Install the steering column hole cover plate with the clip.
33. INSTALL WINDSHIELD WIPER SWITCH ASSY Install the windshield wiper switch assy and connect the connector.
34. INSTALL HEADLAMP DIMMER SWITCH ASSY Install the headlamp dimmer switch assy and connect the connector.
35. PLACE FRONT WHEELS FACING STRAIGHT AHEAD
36. INSTALL SPIRAL CABLE SUB-ASSY (See AIR BAG RESTRAINT SYSTEM )
37. CONNECT FLOOR SHIFT PARKING LOCK CABLE ASSY (A/T TRANSAXLE) With the key in the ACC position, connect the floor shift parking lock cable.
38. CHECK KEY INTERLOCK OPERATION
39. INSTALL STEERING COLUMN COVER Install the steering column cover UPR. Install the 2 bolts. Torque: 21 N.m (210 kgf.cm, 15 ft.lbf) Install the steering column cover LWR with the 3 screws.
40. ADJUST SPIRAL CABLE SUB-ASSY
41. INSTALL STEERING WHEEL ASSY Align the matchmarks with the one on the steering wheel assy and steering main shaft assy. Install the steering wheel assy with the set nut. Torque: 50 N.m (510 kgf.cm, 37 ft.lbf) Connect the connector.
42. INSTALL HORN BUTTON ASSY (See AIR BAG RESTRAINT SYSTEM )
43. INSPECT HORN BUTTON ASSY (See AIR BAG RESTRAINT SYSTEM )
44. INSPECT STEERING WHEEL CENTER POINT
45. INSPECT SRS WARNING LIGHT (See AIR BAG RESTRAINT SYSTEM )