Mazda MX-5 NA silhouetteMX-5 NA

AUDIO - Speaker / Audio Unit Troubleshooting (continued)

T-116prose procedure
Continued from T-115

Table 1

Table 1

Left door
BalanceLeft
Speaker operatesYes
JudgementLeft door speaker circuit OK
Next Step-
Left door
BalanceLeft
Speaker operatesNo
JudgementLeft door speaker circuit faulty
Next StepStep 5
Right door
BalanceRight
Speaker operatesYes
JudgementRight door speaker circuit OK
Next Step-
Right door
BalanceRight
Speaker operatesNo
JudgementRight door speaker circuit faulty
Next StepStep 5

Step 5

  1. 1
    Remove the faulty door speaker cover and speaker installation screws.
    Illustration of a door panel with the speaker removed, showing the speaker assembly disconnected and held away from the door. Illustrates Step 5 - removing the door speaker cover and installation screws to access the speaker connector.
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  2. 2
    Check if the speaker is properly connected.
  3. 3
    If necessary, repair or reconnect the connector.
  4. 4
    If the connection is OK, go to Step 6.

Step 6

  1. 1
    Disconnect the connector from the suspected faulty speaker.
    Illustration of a multimeter (ohmmeter) measuring resistance across the terminals of a speaker. Illustrates Step 6 - measuring 4 ohm resistance between speaker terminals.
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  2. 2
    Measure resistance between terminals of the speaker.
  3. 3
    If not as specified, replace the speaker.
    Resistance: 4 ohm
  4. 4
    If the resistance is OK, go to Step 7.
Resistance
4ohm

Step 7

  1. 1
    Disconnect the 12-pin connector of the audio unit.
    Connector pinout diagram showing the AUDIO UNIT 12-pin connector at top (with an X over one position indicating not used / disconnected) and two speaker connectors below labeled LEFT DOOR SPEAKER and RIGHT DOOR SPEAKER. Wires shown: (L/Y), (R/G) at audio unit top row; (L), (R/W) at audio unit bottom row; LEFT DOOR SPEAKER has (R/W) and (R/G); RIGHT DOOR SPEAKER has (L) and (L/Y).
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  2. 2
    Disconnect both door speakers.
  3. 3
    Check for continuity of the following wires of the door speakers wire harness.
  4. 4
    If not as specified, repair the faulty wiring.
  5. 5
    If the wiring is OK, replace the audio unit.

Continuity check (Step 7)

Audio unit - Left door speaker
Wire(R/W)
ContinuityYes
Audio unit - Left door speaker
Wire(R/G)
ContinuityYes
Audio unit - Right door speaker
Wire(L)
ContinuityYes
Audio unit - Right door speaker
Wire(L/Y)
ContinuityYes
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