Mazda MX-5 1990 Workshop Manual page 698

T
AUDIO
Table 1
Speaker Balance Speaker operates Judgement
Next Step
Left door Left
Yes
No
Yes
Right door Right
No
05UOTX-255
05UOTX-256
(L/Y)
(RIG)
I :
AUDIO UNIl
111.fa
III
(L) (R/W)
(R/W)-n (R/W)-n
( R / G ) U (R/G)-o
LEFT DOOR SPEAKER RIGHT DOOR SPEAKER
05UOTX-257
T-116
Left door speaker circuit OK
-
Left door speaker circuit faulty Step 5
Right door speaker circuit OK
-
Right door speaker circuit faulty
Step 5
05UOTX-254
Step 5
1. Remove the faulty door speaker cover and speaker instal-
lation screws.
2. Check if the speaker is properly connected.
3. If necessary, repair or reconnect the connector.
4. If the connection is OK, go to Step 6.
Step 6
1. Disconnect the connector from the suspected faulty speaker.
2. Measure resistance between terminals of the speaker.
Resistance: 40
3. If not as specified, replace the speaker.
4. If the resistance is OK, go to Step 7.
Step 7
1. Disconnect the 12-pin connector of the audio unit.
2. Disconnect both door speakers.
3. Check for continuity of the following wires of the door speak-
ers wire harness.
Connectors
Wire
Continuity
Audio unit - Left door speaker
(RIW) Yes
(RIG) Yes
Audio unit - Right door speaker
(L) Yes
(L/Y)
Yes
4. If not as specified, repair the faulty wiring.
5. If the wiring is OK, replace the audio unit.