SPECIFICATIONS
| Item | Specification | |
|---|---|---|
| Steering wheel | Type | 3-spoke type |
| Outside diameter mm (in) | 375 (14.7) | |
| Maximum number of turns | 3.09 | |
| Power steering type | Electrical powered type | |
| Steering gear | Type | Rack and pinion type |
| Stroke ratio (Rack stroke/Steering wheel maximum number of turns) mm/rev (in/rev) | 46.67 (1.84) | |
| Rack stroke mm (in) | 144 (5.7) | |
| Motor | Type | Permanent magnetic field type |
| Rated voltage V | DC 12 | |
| Rated current Arms | 79 | |
| Torque sensor | Type | Non-contact type (Magnetism detection type) |
| Electric power steering-ECU | Control type | Microcomputer control (32 bit) |
| Rated voltage V | DC 12 | |
SPECIFICATIONS
Scheme 1
To improve operational reliability, the dual-circuit system has been adopted for the torque sensor. If any malfunction occurs in the electric power steering system, the fail-safe function of the electric power steering-ECU is activated, and the output current of the electric power steering-ECU applied to the motor is turned off. At the same time, the steering system enters manual mode, and informs a driver of the system malfunction by illuminating the warning light on the combination meter. The warning light illuminates when the following malfunctions occur: open circuit in the electric power steering system wiring harness, poor connection, malfunctions in the electric power steering-ECU, motor, or sensors.
SERVICE SPECIFICATIONS
| Item | Standard value | Limit | |
|---|---|---|---|
| Steering wheel free play mm (in) | 30 (1.2) or less | ||
| Steering angle | Inner wheel | 40° 50' ± 1° 30' (Difference between right and left wheels must be 2°00' or less) | |
| Outer wheel (reference value) | 33° 50' | ||
| Tie-rod looseness mm (in) | Within ± 2.0 (0.08) | ||
| Tie rod end ball joint turning torque N.m (in-lb) | 2.9 (26) or less | ||
| Stationary steering force N | Steering force | 29 (6.5) or less | |
| Fluctuation band | 5.9 (1.33) or less | ||
| Total rotational torque of pinion N.m (in-lb) | Total rotational torque | 1.29 - 2.23 (11.4. 19.7) | |
| Torque fluctuation | 0.92 (8.1) or less | ||
| Band crimped value mm (in) | 2.4 - 2.8 (0.09 - 0.11) | ||
SERVICE SPECIFICATIONS
TIE ROD END BALL JOINT ROTATION TORQUE CHECK
Required Special Tools
- MB990326: Preload Socket
- MB991897 or MB992011: Ball Joint Remover
| CAUTION | Loosen the jam nut (tie-rod end connection) from the ball joint, but do not remove here. Use the special tool. To prevent the special tool from dropping off, suspend it with a cord. |
Scheme 2
Scheme 3
Scheme 4
- Install special tool MB991897 or MB992011 as shown in the illustration.
- Turn the bolt and knob to make the special tool jaws parallel, then hand-tighten the bolt. After tightening, check that the jaws are still parallel. NOTE: To adjust the special tool jaws to be parallel, set the orientation of the knob as shown in the illustration.
- Unscrew the bolt to disconnect the ball joint.
- Move the ball joint stud several times and install the nut on the stud. Using the special tool MB990326, measure the ball joint rotation torque. Standard value: 2.9 N.m (26 in-lb) or less
- If the rotation torque exceeds the standard value, replace the tie rod end (Refer to «DISASSEMBLY AND ASSEMBLY»(ref-592627-S41041306792014011000000) ).
- If the rotation torque is under the standard value, check the ball joint for end play or ratcheting. If no end play or ratcheting, the ball joint can be re-used.
- Install the tie rod end to the knuckle, then tighten a new jam nut to the specified torque. Tightening torque: 52 ± 2 N.m (38 ± 1 ft-lb)
STEERING GEAR TOTAL PINION TORQUE CHECK
Required Special Tools
- MB991006: Preload Socket
| CAUTION | When holding the steering gear in a vice, secure its mounting positions. If it is secured in any other place, the gear housing may become deformed or damaged. |
Scheme 5
- Using special tool preload socket (MB991006), rotate the pinion gear at the rate of one rotation in approximately 4 to 6 seconds to check the total pinion torque. Standard value: Total rotational torque: 1.29 - 2.23 N.m (11.4 - 19.7 in-lb) Torque fluctuation: 0.92 N.m (8.1 in-lb) or less NOTE: When measuring, remove the bellows from the rack housing. Measure the pinion torque through the whole stroke of the rack.
- If not within the specification, replace the steering gear and linkage assembly (Refer to «POWER STEERING GEAR BOX AND LINKAGE»(ref-592627-S40972102012014011000000) ).
Scheme 6
Required Special Tool
- MB992209: Boot band clipping tool
- MB992249: Variable spanner
Scheme 7
Scheme 8
Scheme 9
- Move the bellows and pull the rack bar toward arrow direction. CAUTION: Do not tighten the vise strongly in order not to damage the rack bar.
- Wrap rack bar with cloth in order not to damage, and fix the rack bar with a vise.
- Use special tool variable spanner (MB992249) to remove the tie-rod.
See also:
• DIAGNOSTIC TROUBLE CODE CHART
• SERVICE PRECAUTIONS