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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Seats) >> Seat Warmer Control Unit Inspection >> Inspection Procedure (No. 2 Seat Warmer Always Operations) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
STEP INSPECTION ACTION
1* DETERMINE IF THE MALFUNCTION CAUSE IS THE SEAT WARMER SWITCH 
  • Switch the ignition off (LOCK).

    With full-auto air conditioner 

  • Disconnect the climate control unit connector.

    With manual air conditioner 

  • Disconnect the indicator unit connector.
  • Switch the ignition ON (engine off or on).
  • Is the seat warmer system operating?
 Yes Go to the next step.
No Replace the climate control unit or indicator unit.
(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
(See INDICATOR UNIT REMOVAL/INSTALLATION .)
2 DETERMINE IF THE MALFUNCTION CAUSE IS THE SEAT WARMER CONTROL UNIT 
  • Disconnect the seat warmer control unit connector.
  • Measure the voltage between seat warmer control unit terminal I and body ground.
  • Is the voltage 1.0 or more  ?
 Yes Repair or replace for a short to ground in the wiring harness.
No Replace the seat warmer control unit. (See SEAT WARMER CONTROL UNIT REMOVAL/INSTALLATION .)
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