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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 372 (On-Board Diagnostic (HVAC)) >> DTC 15 >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC 15 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1
  • Is water temperature sensor normal?
 Yes Go to next step.
No Replace water temperature sensor.
2
  • Disconnect climate control unit connector (24-pin) and water temperature sensor connector.
  • Is there an open circuit between the following climate control unit terminals and water temperature sensor terminals?
    • 1O-B
    • 1I-A
 Yes Repair wiring harness.
No Go to next step.
3
  • Is there a short circuit to ground between climate control unit terminal 1O and water temperature sensor terminal B?
 Yes Repair wiring harness.
No Connect climate control unit connector, then go to next step.
4
  • Turn the ignition switch to ON position.
  • Is voltage at climate control unit terminal 1O 5 V or above? 
 Yes This system is normal at present. (Erase the past failure from memory.)
No Replace climate control unit.
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