7.3.5 Diagnostic information and procedures 

7.3.5.1 Diagnosis descriptions 

Refer to 7.3.2 Description and operation, get familiar with the system functions and operation before starting 
system diagnosis, so that it will help to determine the correct diagnostic steps, more importantly, it will also help 
to determine whether the situation described by the customer is normal. 

7.3.5.2 Visual inspection 

Before repairing, firstly confirm the customer fault. Inspect whether the tire pressure is normal, whether there is 
obvious mechanical or electrical damage, whether the tightening bolt on the mechanical steering column assembly 
shaft movable coupling head is loose and whether the fixing bolt on the mechanical steering column assembly 
mounting bracket is loose. 

7.3.5.3 Fault symptom table 

Help to determine the cause of the fault and part in the diagnostic process with reference to the following table. 
Display the possible malfunction causes in the ascending numerical order and check each component in order. 
Repair or replace these components if necessary. 

Symptoms Suspected 

parts 

Measures / referance 

1. 

Fixing nut of steering wheel(loosed 
/damaged) 

Refer to 7.3.6.3 Replacement of 
steering wheel to fasten or replace 
the nut. 

2. 

Mechanical steering column assembly 
system connecting bolt (loosed 
/damaged) 

Refer to 11.3.8.12 Replacement of 
mechanical steering column 
Assembly to fasten or replace the 
bolt. 

3. 

Upper and lower middle shaft 
universal joint (abrasion) 

Replace upper and lower 
intermediate shaft assemblies. 

4. 

Steering wheel spline housing (worn)

Replace steering wheel, refer 
to7.3.6.3 steering wheel 
replacement. 

5. 

Steering column spline shaft (wear) 

Replace steering column, refer 
to11.3.8.12 machinery steering 
column assembly replacement. 

6. 

Upper and lower intermediate shaft 
spline housing/shaft (wear) 

Replace upper and lower 
intermediate shafts. 

Steering wheel loosed 

7. 

Power steering gear and tie rod 
assembly 

Refer to 7.2.8.13 replacement of 
power steering gear assembly with 
Tie rod to repair or replace the 
power steering gear assembly with 
the tie rod. 

1. 

Mounting bolt of mechanical steering 
column (loosed /damaged) 

Refer to 11.3.8.12 replacement of 
mechanical steering column 
Assembly to fasten or replace. 

2. 

Mounting support (damaged) of 
mechanical steering pipe column 
assembly. 

Replace instrument desk bracket, 
refer to12.8.3.4 cross beam of 
instrument panel replacement. 

Mechanical steering column 
Assembly loose 

3. 

Mechanical steering column assembly 
(damaged ) 

Refer to 11.3.8.12 Replacement of 
mechanical steering column 
Assembly to replace mechanical 
steering column assembly. 

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1. 

Mounting bolt of mechanical steering 
column assembly (loosed /damaged) 

Refer to 11.3.8.12 replacement of 
mechanical steering column 
assembly to fasten or replace. 

2. Airbag 

clock 

spring (loosed 

/damaged) 

Refer to 9.2.7.3 replacement of 
clock spring to reinstall or replace 
the clock spring. 

3．  Connecting bolt of the mechanical 

steering column assembly system 
(loose/damaged) 

Refer to 11.3.8.12 mechanical 
steering column assembly to fasten 
or replace the bolt. 

Assembly Replacement. 

4. Shaft/bearing 

of 

mechanical 

steering 

column assembly (damage) 

Refer to 11.3.8.12 replacement of 
mechanical steering column 
assembly to replace mechanical 
steering column assembly. 

Mechanical steering column 
assembly noise 

5. 

Upper and lower intermediate shaft 
universal joint (Lack 
lubrication/worn ) 

Apply lubricating grease or replace 
the upper and lower intermediate 
shafts. 

1. 

Inclined lock block of steering 
column (stuck) 

Clean up impurities, derust the 
lubrication locking block or replace 
the steering column. Refer to 
11.3.8.12 replacement of 
mechanical steering column 
Assembly. 

2. 

Steering pipe column inclination 
angle adjusting handle (loose/ 
damage) 

Refer to 11.3.8.12 Replacement of 
mechanical steering column 
assembly to fasten the fixing nut or 
replace the handle. 

3. 

Steering pipe column tilting spring 
(soft/ damage) 

Refer to 11.3.8.12 Replacement of 
mechanical steering column 
Assembly to reinstall or replace the 
spring. 

The regulating function of 
the dip angle of the steering 
column is abnormal. 

4. 

Tilting pivot of mechanical steering 
pipe assembly (rusting/ damage) 

For derusting and lubrication or 
replacement of mechanical steering 
column assembly, see 11.3.8.12 
replacement of mechanical steering 
column assembly. 

1. 

Ignition switch install bolt(loosed 
/damaged) 

Fasten or replace the mounting bolt.

2. 

Ignition switch lock (stuck/damaged) 

Derust and lubricate or replace the 
ignition switch. 

3. 

Ignition switch lock pin ( broken 
/damaged ) 

Replace ignition switch. 

The mechanical steering 
column assembly is 
difficultly locked/unlock. 

4. 

Inner shaft of mechanical steering 
column assembly (damage) 

Refer to 11.3.8.12 replacement of 
mechanical steering column 
assembly to replace mechanical 
steering column assembly. 

1. Ignition 

switch 

lock(clip-on/damaged ) 

Derust and lubricate or replace the 
ignition switch. 

The mechanical steering 
column assembly is 
difficultly unlocked/ unable 
to unlock. 

2. 

Ignition key (worn /damaged) 

Replace ignition switch. 

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7.3.6 Dismantle and installation   

7.3.6.1 Steering wheel free clearance inspection 

1. 

Park the automobile, and the front wheels are towards the front. 

Notes: 

The free clearance of the vehicle is unable to adjust. 
Replace the power steering gear assembly with tie rod 
in the case of normal upper and lower intermediate 
shaft universal joint. 

2. 

During rotation, feel whether there is gap 
between upper and lower shafts, if yes, replace 
upper, and lower middle shafts. 

Max. free clearance:30 mm (1.18 in) 

 

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7.3.6.2 Upper/lower intermediate shaft universal joint inspection 

1. 

Fix one end of upper, lower middle shaft 
universal joint, to rotate the other end of upper, 
lower middle shaft universal joint in clockwise 
and counterclockwise. 

2. 

Whether there is any movement, if yes, it is 
necessary to replace upper, lower middle shaft. 

 

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Max.free clearance

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7.3.6.3 Steering wheel replacement 

Dismantlement Procedure 

Warning! 

Warning: Refer to Warning for battery disconnection in warnings and precautions. 

Notes: 

Prior to operation, the front wheel must be positioned right ahead and the steering wheel must be locked. 

1. 

Dismantle battery negative cable , refer to 
2.11.8.1 Disconnect connecting process of 
battery cable 

2. 

Dismantling of driver's side safety airbag, refer to 
Replacement of driver's side safety airbag. 

 

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3. 

Dismantle fixing nut of steering wheel. 

4. 

Pull out steering wheel. 

 

Installation procedure: 

1. 

Make the front wheel point to right front, and 
install steering wheel. 

2. 

Tighten fixing nut of steering wheel. 

Torque: 40 Nm (Metric) 29.6 lb-ft (English system) 

3. 

Install the driver's side airbag. 

4. 

Connect the battery negative cable. 

 

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