| DETECTION CONDITION |
- The PCM monitors the IAT sensor signal. If the PCM detects that the IAT sensor voltage is below 0.1 V
for 5 s
, the PCM determines that the IAT sensor circuit has a malfunction.
Diagnostic support note
- This is a continuous monitor (CCM).
- The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
- The DTC is stored in the PCM memory.
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| FAIL-SAFE FUNCTION |
- Fixes the intake air temperature (for engine control) at 20 °C {68 °F}
.
- Inhibits the fuel cut control during shift change.
|
| POSSIBLE CAUSE |
- MAF/IAT sensor connector or terminals malfunction
- IAT sensor malfunction
- Short to ground in wiring harness between MAF/IAT sensor terminal D and PCM terminal 1AC
- PCM connector or terminals malfunction
- IAT sensor signal circuit and ground circuit are shorted to each other
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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