Protege L4-2.0L DOHC (2003)
4. Inspect for an open or short circuit in the following wiring harnesses by probing the applicable sensor and SST (104 Pin Breakout Box) terminals
with ohmmeter leads.
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If there is an open or short circuit, repair or replace wiring harnesses.
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If there is no open or short circuit, replace the IAT sensor.
Open circuit
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IAT signal circuit (IAT sensor connector terminal A and PCM connector terminal 39)
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GND circuit (IAT sensor connector terminal B and PCM connector terminal 91)
Short circuit
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IAT signal circuit (IAT sensor connector terminal A and PCM connector terminal 39 to GND)
5. Install the IAT sensor.