XG 350 V6-3.5L (2002)
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ACCEL PSNSR(EMS) = APS2, which is the main APS sensor signal. This signal goes to the PCM (EMS in the code description implies PCM).
ACCEL P.SNSR(ETS) = APS1, which is the redundant APS sensor signal. This signal goes to the ETS Control Module/PCM.