Page 2305 - Foton Workshop Manual - Aumark (BJ1099)

DIAGNOSIS-AUDIO SYSTEM 62-253

Is the result normal?
Yes>To step 3.
No >If there is no battery voltage, repair the open circuit between fuse F22 (7.5 A) to
sound unit C66 connector No. 4 pin. If there is no battery voltage only between sound
unit C66 connector No. pin 4 and No. 8 pin, repair the open circuit between sound
unit C66 connector No.8 and the grounding. 62

5. Check power circuit

(a). Disconnect sound unit connector C66.

(b). Measure the voltage between the No.7 pin
of sound unit connector C66 and the
grounding with the multimeter.
Standard Voltage：(check whether there is
a short circuit)

Connect the pin by Standard value
multimeter
C66(7) - Grouding Battery volt

Is the result normal?
Yes>Find the causes from other symptoms.
No >Repair the open circuit from sound unit C66 connector No. 7 pin to the fuse: F3(15A).

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