Page 254 - Foton Workshop Manual - Auman EST-M

DI - 200 Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts

Failure phenomenon Phenomenon description
Ignition switch is in the "ACC" gear. In the normal use of the radio, the speaker gives no
No any sound from the speaker
sound and is mute.
Caution
First check whether the radio is set to mute state, if not, perform the following diagnosis. Take the left
speaker as an example, the right front speaker shall be checked with the same method.

Diagnosis procedure
1. Check the speaker

a. Ignition switch:LOCK.
b. Disconnect the connector C003 of left front speaker

c. Take a multimeter to measure the resistance of the No. 1
and No. 2 terminals of the front left speaker connector
C003.
Standard resistance:

Multimeter connecting terminal Standard value

C003(1)-C003(2) About 0Ω

Is the test result ok?
Yes>go to Step 2.

No> Replace the left / right front speakers.
2. Check the harness between the speaker and the radio

a. Ignition switch:LOCK.
b. Disconnect the connector C003 of left front speaker

c. Disconnect the connector B044 of radio cassette player
d. Measure the resistances separately between No.1 and 2
terminals of left front speaker connector C003 and No.B5
and B6 terminals of radio cassette player connector
B044 with a multimeter at its resistance position
Standard resistance:

Multimeter connecting terminal Standard value

C003(1)-B044(B5) About 0Ω

C003(2)-B044(B6) About 0Ω

DI-200