Mazda MX-5 NA silhouetteMX-5 NA

AIR BAG SYSTEM

T-148prose procedure
Continued from T-147

Flowchart No. 7

Fault indication
DescriptionWarning lamp flashes two times or eight times
Possible cause
DescriptionPoor ground of D-sensor

Step 1

  1. 1
    Disconnect the negative battery cable.
    Steering wheel illustration with an inset showing the clock spring connectors (Orange and Blue) at the column to be disconnected after removing the knee protector.
    05U0TX-401
  2. 2
    Remove the knee protector, and disconnect the clock spring connectors (Orange and blue).
  3. 3
    Disconnect the diagnostic module connector.
    Diagnostic module connector diagram showing two connector blocks labelled (BLACK) and (GRY) with terminal callouts 2E (BR), 2H (BR/W), 2J (BR/Y). An ohmmeter is shown probing between the labelled terminals and a body ground.
    05U0TX-402
  4. 4
    Check continuity between the following terminals of the diagnostic module connector and a body ground.

Step 1 — Diagnostic module terminal-wire to body ground continuity

2J (BR/Y)— Body ground
ContinuityYes
ActionNext, check between 2H (BR/W) and body ground
2J (BR/Y)— Body ground
ContinuityNo
ActionGo to Step 2
2H (BR/W)— Body ground
ContinuityYes
ActionNext, check between 2E (BR) and body ground
2H (BR/W)— Body ground
ContinuityNo
ActionGo to Step 3
2E (BR)— Body ground
ContinuityYes
ActionReplace diagnostic module
2E (BR)— Body ground
ContinuityNo
ActionGo to Step 4

Step 2

  1. 1
    Disconnect the D-sensor (RH) connectors, and check continuity between terminals of the sensor connectors and a body ground.
    Illustration of the D-sensor (RH) showing the sensor body with two-terminal connector labelled with terminal b, and an ohmmeter probing between terminal b and body ground.
    05U0TX-403
  2. 2
    If not as specified, go to Step 5.
  3. 3
    If correct, replace the wire harness assembly.

Step 2 — D-sensor (RH) terminal to body ground continuity

b—Body ground
ContinuityYes

Step 3

  1. 1
    Disconnect the D-sensor (CNT) connectors, and check continuity between terminals of the sensor connector and a body ground.
    Illustration of the D-sensor (CNT — center) showing the sensor body with two-terminal connector labelled with terminal b, and an ohmmeter probing between terminal b and body ground.
    05U0TX-404
  2. 2
    If not as specified, go to Step 5.
  3. 3
    If correct, replace the wire harness assembly.

Step 3 — D-sensor (CNT) terminal to body ground continuity

b—Body ground
ContinuityYes
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See also

T-133AIR BAG SYSTEM - SERVICE PRECAUTION

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