Speaker(S) Do Not Operate - Mazda MX-5 1990 Workshop Manual

AUDIO
T
TROUBLESHOOTING
Note
Symptom: Speaker(s) do not operate.
(Without headrest speakers.)
• Before troubleshooting, verify that the customer is using the audio system correctly.
If not, advise or instruct in him/her the proper operating procedure. (Refer to page T -110.)
05UOTX-250
05UOTX-251
05UOTX-252
BASS -®-BAL
TRE
PULL.
LIGHT
PUSH
BALANCE CONTROL
05UOTX-253
05UOTX-249
Step 1
Check if the anti-theft system has been activated. Turn the ig-
nition switch to ACC and note the display.
Display Action
CODE flashes
Deactive anti-theft system
(Refer to page T -114.)
Note
If CODE appears when ignition switch is
turned to ACC from OFF go to Step 2.
Err flashes
Have audio unit changed at a Panasonic serv-
ice company
Clock
Go to Step 4
No indication
Go to Step 2
Step 2
1. Remove the audio unit. (Refer to page T -126.)
2. Check the connections of the ground wire and the short
plug.
3.
If a connection is poor or loose, repair or replace it.
4. If the connections are OK, go to Step 3.
Step 3
1. Turn the ignition switch to ACC.
2.
Measure the voltage at the following terminal-wires of the
audio unit connector.
Wire Voltage
Action
12V Next. check wire (LlR)
(LIB)
Check CIGAR 15A fuse
OV
If CIGAR 15A fuse OK, repair wiring harness
(CIGAR 15A fuse - Audio unit)
12V
Replace audio unit
(LlR)
Check ROOM 10A fuse
OV
If ROOM 10A fuse OK, repair wiring harness
(ROOM 10A fuse - Audio unit)
Step
4
Locate the faulty speaker(s) by using the balance control.
1.
Turn the ignition switch to
ACC.
2. Playa prerecorded tape, and set the volume to the center
position.
3. Set the balance control as shown in Table 1 (page T -116).
Check operation of each speaker.
4. From results of Table 1 testing, go to the next step.
T-115
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