Mazda MX-3 silhouetteMX-3

TROUBLESHOOTING - Intake air mode does not change (continued)

G-31flowchart
Continued from G-30

Step 3

  1. 1
    Turn the ignition switch to OFF.
  2. 2
    Disconnect the air intake actuator connector.
  3. 3
    Check for continuity between the following terminal wires of the air intake actuator connector and ground while operating the REC/FRESH switch.
    Connector terminal layout shown on a line illustration of wiring routing under the dash. Terminals labeled (L/W) and (L/R).

Step 3

(L/W)
SwitchREC
ContinuityYes
ActionCheck (L/R) wire
(L/W)
SwitchREC
ContinuityNo
ActionGo to Step 4
(L/R)
SwitchFRESH
ContinuityYes
ActionCheck air intake actuator (Refer to page G-42)
(L/R)
SwitchFRESH
ContinuityNo
ActionGo to Step 4

Step 4

  1. 1
    Verify that the ignition switch is at OFF.
  2. 2
    Disconnect the heater control unit connectors.
  3. 3
    Check for continuity between the following terminal wires of the air intake actuator and heater control unit connectors.
    Two connector terminal layout diagrams. Top: AIR INTAKE ACTUATOR CONNECTOR with terminals (L/W) and (L/R). Bottom: HEATER CONTROL UNIT CONNECTOR with terminals (L) and (L/R) and additional unlabeled cavities.

Step 4

(L/R)
ContinuityYes
ActionCheck for continuity at (L/W)-(L) wire
(L/R)
ContinuityNo
ActionRepair wiring harness (Heater control unit - Air intake actuator)
(L/W) (L)
ContinuityYes
ActionCheck heater control unit (Refer to page G-43)
(L/W) (L)
ContinuityNo
ActionRepair wiring harness (Heater control unit - Air intake actuator)
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See also

page G-42page G-43

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