4.4.4.9 Side-way diagnosis with vehicle running 

1 

Check whether tire balance is normal and the tire pressure is normal? 

 

 

 

2 

Check whether wheel positioning is normal? 

 

 

 

3 

Check whether the tire wear is normal? 

 

 

 

4 

Check whether the hub run-out is normal? 

 

 

 

5 

Check whether the steering tie rod ball head works normally? (no abrasion or loosening conditions 
occur) 

 

 

 

6 

Check whether    the lower swing arm ball head works normally? (no abrasion or loosening conditions 
occur) 

 

 

 

7 

Check whether the wheel run-out is too large? 

 

 

Measure the run-out of the hub flange.  Replace 
the hub if necessary. 

Adjust the tire pressure to the standard value to 
perform dynamic balance for the tire. 

Fasten the nut and replace the steering tie rod 
ball head if necessary. 

Readjust the wheel positioning. 

Replace the tire 
Note: the wheels of the vehicle should be 
positioned immediately after replacing. 

Fasten the nut and replace the lower swing arm 
ball head if necessary. See 4.2.7.7 replacement 
of lower swing arm ball end assembly. 

Measure the run-out of the wheel, re-assemble 
the wheel and tire and replace the damaged 
components if necessary. 

Yes 

No 

Yes 

No 

Yes 

No 

Yes 

No 

Yes 

No 

Yes 

No 

Yes 

No 

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8 

Confirm that the fault has been fixed. 

 

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4.4.4.10 Indicating mark of tire worn 

NL04-1018b

 

The original tire has embedded tread wear indication mark for displaying the tire needing to replace.When the tire 
tread is shallow, these marks display in the mode of strap; when there are 3 grooves in 6 positions appearing the 
indication marks, it is recommended to replace the tire. 

4.4.4.11 Meridian tire line deflection correction 

1. 

Definition of fault: 

The vehicle deviates from the original traveling direction to the left or right when no external force is applied to 
the steering wheel during the straight-line running at a certain speed. 

2. 

Determination baseline of vehicle off tracking: 

A.  To maintain the vehicle running along the original direction when it travels straightly at a certain speed, a 

force preventing the steering wheel from turning clockwise or counterclockwise needs to be applied to the 
steering wheel. 

B.  The vehicle deviates from the original route to the left or right when the hands leave the steering wheel under 

the circumstance that the vehicle travels along a straight line at a certain speed {this case usually refers to the 
case where the vehicle deviates from the original route by more than 1m (39.4 in) per 100m (3940 in) it 
travels}. 

Notes: 

During deviation correction, the inspection of the following basic items for the vehicle shall be done. 

A.  Check whether the front and rear wheel brakes are dragged. 

B.  Check for excessive difference in wear degree of the tires connected to the same suspension. 

C.  Check for excessive difference in wear degree of the tires connected to the same suspension. 

If any one of the above is abnormal, please firstly regulate in the normal state, and then carry out road rest of the 
vehicle to confirm whether the fault is removed. 

3. Correction 

procedure: 

Warning! 

Please carry out road test of vehicle under the safety condition and comply with all traffic regulations. Do not 
attempt any operation that could jeopardize vehicle control. If contrary to the above safety instruction, result in 
serious injury accident and damage to the vehicle. 

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1 

Carry out road test for the vehicle to judge whether the vehicle deviates? 

 

 

 

2 

Check whether the toe-in of the front wheel is normal? 

 

 

 

3 

Check whether the wheel positioning accords with the specified value? 

 

 

 

4 

Check whether all positioning parameters of the vehicle compared with the numerical value in the 
specification table accord with the specification? 

 

 

 

5 

Carried out tire rotation process 

A.  Exchange the front left wheel assembly with the rear left wheel assembly. 

B.  Road test the vehicle. 

Does the vehicle still deviate? 

 

 

 

6 

Carried out tire rotation process 

A.  Exchange the front left wheel assembly with the rear left wheel assembly and replace the front left tire. 

B.  Road test the vehicle. 

Does the vehicle still deviate? 

 

 

 

Go to step 10 

Explain the deviation definition to the customer. 
The vehicle may be deviated in a short time 
according to different road conditions.

Readjust the toe-in value of the front wheel of 
the vehicle and perform positioning adjustment if 
necessary.

Adjust the wheel positioning of the vehicle 

The system is normal. 

Yes 

No 

Yes 

No 

Yes 

No 

Yes 

No 

Yes 

No 

The system is normal. 

Yes 

No 

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