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Code 5: (Knock Sensor)

WARNING: This page is about a different car, the 1994 Mazda RX-7. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Trouble Code No. 5 Diagnostic Chart (RX7) (Knock Sensor)
G93G80610
Fig 2: Trouble Code No. 5 Schematic (RX7) (Knock Sensor)
G93H80611