Rack Inspection
1. Inspect the rack for cracking, damage, and tooth wear. Replace it as necessary.
2. Measure the runout of the rack.

Runout
Near point A: 0.15 mm {0.006 in} max.Near point B: 0.20 mm {0.008 in} max.
3. If not within the specification, replace the rack.
Tie-rod End Inspection
1. Inspect the tie-rod end for damage and boot cracks. Replace it as necessary.
2. Inspect the ball joint for looseness. Replace the tie-rod end as necessary.
3. Rotate the ball joint five times.
4. Measure the rotation torque of the ball joint using the SST
and a pull scale.

Rotation torque
0.4-2.7 N·m {3.5-27.5 kgf·cm, 3.1-23.8 in·lbf} Pull scale reading
3.4-25.5 N {0.35-2.60 kgf, 0.8-5.7 lbf}
5. If not within the specification, replace the tie-rod end.
Tie rod Inspection
1. Inspect the tie rod for bending and damage. Replace it as necessary.
2. Inspect the ball joint for looseness. Replace the tie rod as necessary.
3. Swing the tie rod five times.
4. Measure the swinging torque using a pull scale.

Swinging torque
0.1-4.0 N·m {1-40.7 kgf·cm, 0.9-35.3 in·lbf} Pull scale reading
0.6-24.5 N {0.06-2.49 kgf, 0.2-5.50 lbf}
5. If not within the specification, replace the tie-rod.
 Steering gear and linkage disassembly
Steering gear and linkage disassembly Steering gear and linkage assembly
Steering gear and linkage assemblyMazda 6 Service Manual: Dsc hu/cm inspection
   1. Remove the battery and battery bracket.
2. Disconnect the DSC HU/CM connector.
3. Connect the SST (49 G066 004) to the DSC HU/CM connector and 
harness side connector.
4. Inspect voltage referring the table below.
Terminal Voltage Table (reference value)
(Ignition switch is at ON, and conne ...
   
Mazda 6 Service Manual: Procedures for determining the location of a malfunction
   System Wiring Diadram
PCM
1. Check the display of DTC U0121 and/or U0155, using the SST (WDS or 
equivalent). (See DTC TABLE.)
2. Referring to the following table, determine the malfunctioning part of the 
CAN system.
ABS/TCS HU/CM or DSC HU/CM
1. Accec and monitor the PCM MSG and IC MSGo ...