Mazda MX-5 NA silhouetteMX-5 NA

AUDIO - Table 2 + Steps 5-7 (With headrest speakers)

T-118prose procedure

Applies to audio system with optional headrest speakers (driver + passenger seat).

Continued from T-117

Table 2

Table 2 - Headrest-speaker balance/operation matrix

Left door
BalanceLeft
Head restraint speaker volumeMin
Speaker operatesYes
JudgementLeft door speaker circuit OK
Next Step-
Left door
BalanceLeft
Head restraint speaker volumeMin
Speaker operatesNo
JudgementLeft door speaker circuit faulty
Next StepStep 5
Right door
BalanceRight
Head restraint speaker volumeMin
Speaker operatesYes
JudgementRight door speaker circuit OK
Next Step-
Right door
BalanceRight
Head restraint speaker volumeMin
Speaker operatesNo
JudgementRight door speaker circuit faulty
Next StepStep 5
Left headrest (Driver seat)
Balance-
Head restraint speaker volumeMax
Speaker operatesYes
JudgementLeft headrest speaker circuit (driver seat) OK
Next Step-
Left headrest (Driver seat)
Balance-
Head restraint speaker volumeMax
Speaker operatesNo
JudgementLeft headrest speaker circuit (driver seat) faulty
Next StepStep 8
Right headrest (Driver seat)
Balance-
Head restraint speaker volumeMax
Speaker operatesYes
JudgementRight headrest speaker circuit (driver seat) OK
Next Step-
Right headrest (Driver seat)
Balance-
Head restraint speaker volumeMax
Speaker operatesNo
JudgementRight headrest speaker circuit (driver seat) faulty
Next StepStep 8
Left headrest (Passenger seat)
Balance-
Head restraint speaker volumeMax
Speaker operatesYes
JudgementLeft headrest speaker circuit (passenger seat) OK
Next Step-
Left headrest (Passenger seat)
Balance-
Head restraint speaker volumeMax
Speaker operatesNo
JudgementLeft headrest speaker circuit (passenger seat) faulty
Next StepStep 8
Right headrest (Passenger seat)
Balance-
Head restraint speaker volumeMax
Speaker operatesYes
JudgementRight headrest speaker circuit (passenger seat) OK
Next Step-
Right headrest (Passenger seat)
Balance-
Head restraint speaker volumeMax
Speaker operatesNo
JudgementRight headrest speaker circuit (passenger seat) faulty
Next StepStep 8

Step 5

  1. 1
    Remove the faulty door speaker cover and speaker installation screws.
    Door panel with the door speaker removed and held away on its harness. Illustrates Step 5 - removing the faulty door speaker cover and installation screws.
    05U0TX-261
  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.
    Multimeter / ohmmeter measuring resistance across the terminals of a door speaker. Illustrates Step 6 - measuring 4 ohm resistance between speaker terminals.
    05U0TX-256
  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 marking unused position) and the LEFT DOOR SPEAKER and RIGHT DOOR SPEAKER connectors below. Wires labelled: audio unit top row (L/Y), (R/G); audio unit bottom row (L), (R/W); LEFT DOOR SPEAKER (R/W) and (R/G); RIGHT DOOR SPEAKER (L) and (L/Y).
    05U0TX-257
  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.

Step 7 - Door speaker harness continuity

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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