Mazda MX-5 1990 Workshop Manual page 439

N
ENGINE SPEED SENSING POWER STEERING
TROUBLESHOOTING GUIDE (Cont'd)
Problem Possible Cause Action Page/Section
General instability Incorrect tire pressure Adjust
Section
Q
while driving
Damaged or unbalanced wheel
Adjust or replace Section
Q
Worn or damaged steering joint(s) Replace N- 9
Improper steering pinion preload Replace gear N-19
Weak front coil spring Replace Section R
Worn or damaged stabilizer and/or upper or lower arm
Replace Section R
bushing
Malfunctioning shock absorber
Replace Section R
Improperly adjusted wheel alignment Adjust Section R
Shake Excessive tire and/or wheel runout Replace Section
Q
(Steering wheel Loose lug nuts
Tighten Section
Q
vibrates up/down)
Unbalanced wheel(s)
Adjust or replace Section 0
Cracked or worn engine mount rubber Replace Section B
Cracked or worn transmission mount rubber
Replace Section J
Shimmy Cracked or worn steering gear mount rubber Replace
N-19
(Steering wheel
Loose steering gear mounting bolts
Tighten
N-19
vibrates left/right)
Stuck or damaged steering ball joint Replace N-19
Excessive tire
and~or
wheel runout Replace Section Q
Loose lug nuts Tighten Section
Q
Unbalanced wheel(s)
Adjust or replace Section
Q
Incorrect tire pressure Adjust Section 0
Unevenly worn tires Replace Section Q
Malfunctioning shock absorber Replace
Section R
Loose shock absorber mounting bolts
Tighten Section R
Stuck or damaged lower arm ball joint Replace Section R
Cracked or worn suspension bushings Replace Section R
Damaged or worn front wheel bearing
Replace Section M
Improperly adjusted front wheel alignment
Adjust Section R
Excessive steering Worn steering gear
Replace N-19
wheel play
Worn or damaged ste~ring joints
Replace N- 9
Worn or damaged lower arm bushing Replace Section R
Loose steering gear mounting bolts Tighten
N-19
Worn linkage or tie-rod ball joint
Replace
N-19
Poor steering wheel Incorrect tire pressure
Adjust
Section
Q
return
Stuck or damaged steering joints
Replace N- 9
Improperly adjusted front wheel alignment Adjust
Section R
Improper steering pinion preload
Replace gear
N-19
Ball joint not operating smoothly
Replace N-19
Steering shaft contacting something
Repair N- 9
Abnormal noise from
Loose oil pump
Tighten
N-21
steering system
Loose steering gear
Tighten N-19
Loose oil pump bracket
Tighten
Section 8
Drive belt loose/tight
Adjust
N-22
Air in system
Bleed air N-15
Malfunctioning steering gear Replace N-19
Malfunctioning oil pump Replace
N-21
Obstruction near steering column or pressure hose
Repair or replace
N- 9
Loose steering linkage
Tighten or replace N-19
Worn steering joints
Replace N- 9
05UONX·022
N-14