Steering Column: Diagnosis Scion tC I

PROBLEM SYMPTOMS TABLE

Use the table below to help determine the cause of the problem. The numbers indicate the priority of the likely causes of the problem. Check each part in order. If necessary, repair or replace these parts.

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1. CHECK STEERING WHEEL FREE PLAY Stop the vehicle and align the tires straight ahead. Turn the steering wheel gently right and left, and check the steering wheel free play. Maximum Free Play: 30 mm (1.18 in.) If the free play exceeds the maximum, replace the steering intermediate shaft sub-assy or steering gear.

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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. Drive the vehicle in 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 the center position. HINT: Look at the upper surface of the steering wheel, steering spoke and SRS airbag line to find the center position. Draw a new line on the masking tape on the steering wheel as shown in the illustration. Measure the distance between the 2 lines on the masking tape on the steering wheel. Convert the measured distance to steering angle. Measured distance 1 mm (0.04 in.) = Steering angle of approximately 1 degree. HINT: Make a note of the steering angle. Adjust steering angle. Draw a line on the RH and LH tie rod ends and rack ends respectively where it can be easily seen. Using a paper gauge, measure the distance from the RH and LH tie rod ends to the rack end screws. HINT: Measure both the RH and LH sides. 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. One 360 degree turn of rack end (1.5 mm (0.059 in.) horizontal movement) equals to 12 degrees of steering angle. Tighten the RH and LH lock nuts by the specified torque. Torque: 74 N.m (750 kgf.cm, 54 ft.lbf) NOTE: Make sure that the difference in length between the RH and LH tie rod ends and rack end screws are within 1.5 mm (0.059 in.). Install the RH and LH boot clips.

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1. PRECAUTION (See «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-224786-S11593879692006031100000) )
2. SEPARATE BATTERY NEGATIVE TERMINAL (See «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-224786-S11593879692006031100000) )
3. PLACE FRONT WHEELS FACING STRAIGHT AHEAD
4. REMOVE HORN BUTTON ASSY (See «REPLACEMENT»(ref-224786-S24480895442006031100000) )
5. REMOVE STEERING WHEEL ASSY 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 2 screws and steering column cover LWR and the steering column cover UPR. HINT: Tilt the steering column assy to the lowermost position when removing the steering column upper cover. Tilt it to the uppermost position when removing the steering column lower cover.
7. REMOVE SPIRAL CABLE SUB-ASSY (see «SPIRAL CABLE SUB-ASSY»(ref-224786-S30234944792006031100000) )
8. REMOVE HEADLAMP DIMMER SWITCH ASSY (see «HEADLAMP DIMMER SWITCH ASSY»(ref-224788-S17843159542006031100000) )
9. REMOVE WINDSHIELD WIPER SWITCH ASSY (see «WINDSHIELD WIPER SWITCH ASSY»(ref-224789-S08142058302006031100000) )
10. REMOVE INSTRUMENT PANEL AIR BAG ASSY LOWER NO. 1 (See «INSTRUMENT PANEL AIR BAG ASSY LOWER NO.1»(ref-224786-S01150235282006031100000) )
11. REMOVE COLUMN HOLE COVER SILENCER SHEET Turn back the floor carpet and remove the 2 clips and the column hole cover silencer sheet.
12. SEPARATE STEERING INTERMEDIATE SHAFT ASSY NO. 2 Put matchmarks on the steering intermediate shaft assy No. 2 and the steering intermediate shaft. Remove bolt and separate the steering intermediate shaft assy No. 2 from the steering intermediate shaft.
13. REMOVE STEERING COLUMN ASSY Disconnect the connectors and the wire harness clamps from the steering column assy. Remove the 3 bolts and the steering column assy.
14. REMOVE STEERING INTERMEDIATE SHAFT ASSY NO. 2 Put matchmarks on the steering intermediate shaft assy No. 2 and steering main shaft assy. Remove the bolt and steering intermediate shaft assy No. 2.
15. REMOVE TRANSPONDER KEY AMPLIFIER Widen the claw hung onto the upper bracket by approximately 1.0 mm (0.039 in.) using a screwdriver. Pull the transponder key amplifier towards the rear of the vehicle with the claw open. NOTE: Do not use excessive force to prevent the case from being damaged.
16. 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, steering column upper w/ switch bracket assy and steering column clamp upper.
17. REMOVE STEERING MAIN SHAFT ASSY Secure the steering column tube in a vise. Insert aluminum plates between the steering column tube and the vise to prevent damage. NOTE: Do not overtighten the vise. Using a snap ring expander, remove the steering main shaft snap ring (outer side). Using a brass bar and a hammer, remove the steering main shaft assy and steering main shaft bearing. NOTE: Be careful not to drop the steering main shaft assy. Using a snap ring expander, remove the steering main shaft snap ring (inner side).
18. 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.
19. REMOVE UN-LOCK WARNING SWITCH ASSY Separate the un-lock warning switch assy connector from the ignition or starter switch assy. Remove the un-lock warning switch assy by pushing up on the center part and disengaging the 2 claws. Manual Transaxle: Remove the clamp from the steering column upper bracket assy. Automatic Transaxle: Disengage the secondary locking device. Automatic Transaxle: Using a screwdriver, disengage the locking lug of terminals 3 and 4, and pull the terminals out from the un-lock warning switch assy connector rear side.
20. REMOVE KEY INTER LOCK SOLENOID (AUTOMATIC TRANSAXLE) Remove the 2 screws and key inter lock solenoid from the steering column upper bracket assy.
21. REMOVE IGNITION OR STARTER SWITCH ASSY Remove the 2 screws and ignition or starter switch assy from the steering column upper bracket assy.
22. INSTALL IGNITION OR STARTER SWITCH ASSY Install the ignition or starter switch assy to the steering column upper bracket assy with the 2 screws.
23. INSTALL KEY INTER LOCK SOLENOID (AUTOMATIC TRANSAXLE) Install the key inter lock solenoid to the steering column upper bracket assy with the 2 screws.
24. INSTALL UN-LOCK WARNING SWITCH ASSY Install the un-lock warning switch assy. Automatic Transaxle: Connect terminals 3 and 4 of the un-lock warning switch assy connector. Connect the un-lock warning switch assy connector to the ignition or starter switch assy. Manual Transaxle: Secure the unlock warning switch assy wire harness to the steering column upper bracket assy with a new clamp as shown in the illustration. NOTE: Do not overtighten the clamp when securing the wire harness as the wire harness could be cut. Automatic Transaxle: Secure the unlock warning switch assy wire harness to the steering column upper bracket assy as shown in the illustration.
25. INSTALL IGNITION SWITCH LOCK CYLINDER ASSY Make sure the ignition switch lock cylinder assy is in the ACC position. Install the ignition switch lock cylinder assy.
26. 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. HINT: If there is any abnormality, replace the ignition switch lock cylinder assy.
27. INSPECT STEERING COLUMN TUBE SUB-ASSY Check that the steering column tube bearing rotates smoothly without looseness in the axial direction or any irregular noise. HINT: Replace the steering column assy if the bearing does not rotate as specified.
28. INSTALL STEERING MAIN SHAFT ASSY Using a snap ring expander, install a new steering main shaft snap ring (inner side) to the steering main shaft assy. Install the steering main shaft assy to the steering column tube. Secure the steering column tube in a vise. Insert aluminum plates between the steering column tube and the vise to prevent damage. NOTE: Do not apply excessive force to the steering column tube bracket when holding the steering column tube in a vise. Do not drop the steering main shaft assy. Using a snap ring expander, install a new steering main shaft snap ring (outer side) to the steering main shaft assy.
29. INSTALL STEERING MAIN SHAFT BEARING Hold the steering column tube in a vise between aluminum plates. NOTE: Do not apply excessive force to the steering column tube bracket when holding the steering column tube in a vise. Install a new steering main shaft bearing to the steering column tube using SST and a hammer. SST 09612-2201 1
30. INSTALL STEERING COLUMN UPPER W/ SWITCH BRACKET ASSY Temporarily install the steering column upper w/ switch bracket assy and steering column upper clamp with 2 new tapered-head bolts. Tighten the 2 tapered-head bolts until the bolt heads break off.
31. INSTALL TRANSPONDER KEY AMPLIFIER Align the transponder key amplifier with the installation position of the upper bracket with the amplifier inclined. Push on the transponder key amplifier and install it to the upper bracket. NOTE: Do not push the amplifier with excessive force.
32. INSTALL STEERING INTERMEDIATE SHAFT ASSY NO. 2 Align the matchmarks on the steering intermediate shaft assy No. 2 and the steering main shaft assy and install them with bolt. Torque: 35 N.m (360 kgf.cm, 26 ft.lbf)
33. INSTALL STEERING COLUMN ASSY Install the steering column assy with the 3 bolts. Torque: 21 N.m (214 kgf.cm, 15 ft.lbf) Connect each connector and clamp the wire harness to the steering column assy bracket.
34. CONNECT STEERING INTERMEDIATE SHAFT ASSY NO. 2 Align the matchmarks on the steering intermediate shaft assy No. 2 and the steering intermediate shaft and install them with bolt. Torque: 35 N.m (360 kgf.cm, 26 ft.lbf)
35. PLACE FRONT WHEELS FACING STRAIGHT AHEAD
36. INSTALL SPIRAL CABLE SUB-ASSY (see «SPIRAL CABLE SUB-ASSY»(ref-224786-S30234944792006031100000) )
37. ADJUST SPIRAL CABLE SUB-ASSY (see «SPIRAL CABLE SUB-ASSY»(ref-224786-S30234944792006031100000) )
38. INSTALL COLUMN HOLE COVER SILENCER SHEET
39. INSTALL INSTRUMENT PANEL AIR BAG ASSY LOWER NO. 1 (See «INSTRUMENT PANEL AIR BAG ASSY LOWER NO.1»(ref-224786-S01150235282006031100000) )
40. INSTALL WINDSHIELD WIPER SWITCH ASSY (see «WINDSHIELD WIPER SWITCH ASSY»(ref-224789-S08142058302006031100000) )
41. INSTALL HEADLAMP DIMMER SWITCH ASSY (see «HEADLAMP DIMMER SWITCH ASSY»(ref-224788-S17843159542006031100000) )
42. INSTALL STEERING COLUMN COVER
43. INSTALL STEERING WHEEL ASSY Align the matchmarks on the steering wheel assy and the steering main shaft assy. Install the steering wheel assy with the set nut. Torque: 50 N.m (510 kgf.cm, 37 ft.lbf)
44. INSPECT STEERING WHEEL CENTER POINT
45. INSTALL HORN BUTTON ASSY (See «REPLACEMENT»(ref-224786-S24480895442006031100000) )
46. CONNECT BATTERY NEGATIVE TERMINAL
47. INSPECT HORN BUTTON ASSY (See «REPLACEMENT»(ref-224786-S24480895442006031100000) )
48. INSPECT SRS WARNING LIGHT (See «DIAGNOSIS SYSTEM»(ref-224757-S22788829722006031100000) )