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Home >> Isuzu >> 2001 >> Rodeo LS, 2.2 D >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.2L >> Diagnostic Tests >> DTC P1618: Serial Peripheral Interface Pcm INTERPROCESSOR Communication Error >> Circuit Description

Circuit Description

Serial Peripheral Interface (SPI) communication is used internally by PCM to send messages between PCM and Transmission Control Module (TCM). Each message contains a check sum value. Both PCM and TCM will compare check sum value to a predetermined calculated value. If check sums do not match, DTC P1618 will set.

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