265 

 
No. 190 CD-player fails to work when activating   

Malfunction Cause 

Solution 

Power source circuit 
malfunction or fuse 
damaged; 

Inspect +B and GND, which normal value shall be 10V to 14V. When ACC 
and GND ignition switch locating at ACC or ON, the voltage shall be 10V to 
14V. In common condition, GND and vehicle earth lead shall be conducted. If 
it indicates no powers supply, then check whether the fuse is burnt or not, 
and replace it if necessary.   

CD-player power switch 
malfunction or damage 

①

 Check the power switch on CD panel; operate the power switch by hand, if 

there is no response then replace the CD-player 

CD-player fails to 
work when 
activating 

Internal CD-player power 
source circuit 
malfunction 

④

 Check the voltage of internal CD-player power source end, if the value is 

between 10~14V as normal, then replace the CD-player assembly 

 

No. 191 CD-player keeps soundless under all modes   

Malfunction Cause 

Solution 

①

 CD-player power 

source malfunction 

Inspect +B and GND, which normal value shall be 10V to 14V. When ACC and 
GND ignition switch locating at ACC or ON, the voltage shall be 10V to 14V. If it 
indicates no powers supply, then shall confirm whether the fuse is burnt or not, 
and replace it if necessary. 

②

 Loudspeaker 

malfunction  

Check whether the appearance of loudspeaker is damaged, as well as the coil 
whether it is burnt.   
Method: Measure the resistance by multimeter setting at ohms range, and the 
value shall be 4 Ohm, if it indicates to infinite, then the loudspeaker is burnt and 
need to be replaced.   

③

 Wires and 

connector 

Check loudspeaker and CD-player connection whether there is open/short 
circuit. Measure two ends of same colour respectively by multimeter setting to 
Ohms range, and the value shall be 0 which means conducted.  Check 
CD-player rear plug whether it is loose, and the power source voltage whether 
it is normal. In generally condition, GND and body earthlead shall be 
conducted.   

CD-player keeps 
soundless under all 
modes  

④

 CD-player sound 

controller damaged   

Check whether CD-player sound controller is damaged, and track adjustment 
whether it is correct, as well as sound adjusting variable voltage regulator 
whether it is badly worn. Replace CD-player assembly. 

 

CD-player fails to work when activating 

External CD-player power 

source 

CD-player switch 

Internal CD-player power source circuit 

Abnormal 

Abnormal 

Abnormal 

Inspect the circuit and replace the fuse 

Replace CD assembly 

Replace CD assembly 

Normal 

Normal 

 
 

 

 

266 

 

CD-player keeps soundless under all modes 

Check wires, connector and 

power source voltage. 

Check LCD screen illumination 

CD –player power 

source malfunction 

Check and replace the fuse 

Check loudspeaker 

Replace loudspeaker 

Replace CD-player assembly 

Replace CD-player assembly

Check CD-player sound 

adjusting button 

Internal CD-player circuit 

 

Normal 

Normal 

Normal 

Normal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Replace CD-player assembly 

 
 

 

 

267 

 
No. 192 CD-player/radio gains no power   

Malfunction Cause 

Solution 

①

Vehicle ignition switch closed 

①

Turn ignition device to ON or ACC position 

②

Fuse burnt 

②

Replace fuse of same specification 

③

Power source output line loose   

③

Replace it with new connector of same 

specification if abnormal 

④

Dirt in connector conducting point.   

④

Clean the conducting point with special cleaning 

solution or replace it with a new one. 

⑤

Connector wire core disconnected 

(open circuit) 

⑤

Check loudspeaker output line with multimeter 

whether it is disconnected, replace it with new 
connector of same specification if necessary   

⑥

Poor fuse contact (open circuit 

sometimes) 

⑥

Connect vehicle battery earthlead and speaker 

housing by lead wire, if CD-player regains normal 
operation, which indicates the earth lead open 
circuit, then replace it with new connector of same 
specification. 

⑦

Connector earth lead open circuit 

⑦

Replace it with new connector of same 

specification 

CD-player gains no power 
when pressing POWER 
button, after the ignition 
switch opened,   

⑧

Internal CD-player/radio short circuit 

⑧

Replace CD-player/radio assembly 

 

 

Replace with fuse of same specification 

CD-player/radio gains no power 

Vehicle ignition switch closed 

Turn to ON or ACC position 

Fuse burnt 

Replace with fuse of same specification 

Power source output line loose 

Replace connector with same specification 

Dirt in connector conducting point 

Clean or replace connector with same 

specification 

Connector wire core disconnected (open circuit) 

Poor fuse contact (open circuit 

sometimes) 

Replace connector with same specification 

Replace connector with same specification 

Replace CD-player/radio 

assembly 

Internal CD-player/radio short circuit 

Connector earth lead open circuit 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Short circuit 

 
 

 

 

268 

 
No. 193 A loudspeaker of CD-player/radio is soundless   

Malfunction Cause 

Solution 

Panel function setting inaptitude 

In SEL menu, on panel, BAL and FDA shall be set to 0 

Loudspeaker damaged 

Replace loudspeaker of same specification. (Note: Firstly, 
connect the output line of front right loudspeaker to the other 
one, and check the sound output, which can indicate whether 
the loudspeaker is broken.) 

Loudspeaker output line wrong 
connected  

Check output line connection whether it is correct. (Please 
refer to the connecting method shows on nameplate.) 

Connector conducting point and 
output line connection containing 
dirt or oxide. 

Clean the connector with special cleaning solution or replace 
it with a new one of same specification. 

Connector wire core disconnected 
(open circuit) 

Measure loudspeaker output line by multimeter, whether it is 
disconnected. And replace it with a new one of same 
specification when necessary. 

A loudspeaker is 
soundless when CD/FM 
operating 

Internal CD-player/radio 
loudspeaker output disconnected

Replace CD-player/radio assembly 

 

 

Loudspeaker outputline 

connection oxide 

A loudspeaker of CD-player/radio is 

soundless 

Loudspeaker output line wrong 

connected 

Panel function setting inaptitude

Loudspeaker damaged 

Dirts on connector conducting 

point 

Replace a new loudspeaker of same specification

Connector wire core disconnected (open

ciercuit) 

Internal CD-player/radio 

loudspeaker output 

Please refer to the connecting method shows on 

nameplate 

In SEL menu, on panel, BAL and FDA shall be set to 0

Clear the oxide or replace with new outputline of 

same specification 

Clean the connector or replace it with a new one of 

same specification 

Replace with new connector of same specification

Replace CD-player/radio assembly 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Abnormal 

 

Disconnected