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The temperature sensor is a platinum (Pt) sensor.
Check the voltage at CP8[TEMP].
V
CP8
≥4V suggests a discontinuity in the platinum sensor or its wiring.
V
CP8
≒0V suggests a short-circuit in the platinum sensor or its wiring.
The resistance of the platinum sensor varies approximately linearly from 100 to 250Ω in the
temperature range from 0 to 400
M
C.
Approximate expressions : R
Pt
(Ω) = 0.37 x T (
M
C) + 100
V
CP8
= 15 x R
Pt
/(1000+R
Pt
)
Any large discrepancy from these relationships suggests an abnormality in the temperature
measurement circuit. Replace IS CTRL-A.
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