Mazda RX-8 Workshop Manual page 299

Turn the ignition switch off.
Disconnect the KS No.1 connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Is there any malfunction?
INSPECT KS NO.1 CIRCUIT FOR SHORT TO GROUND
4
KS No.1 connector is disconnected.
Turn the ignition switch off.
Inspect for continuity between the
following circuits:
Is there continuity?
INSPECT KS NO.1
5
Inspect the KS No.1.
(See KNOCK SENSOR (KS) INSPECTION
[13B-MSP].)
Is there any malfunction?
INSPECT PCM CONNECTOR FOR POOR CONNECTION
6
Turn the ignition switch off.
Disconnect the PCM connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Is there any malfunction?
INSPECT KS NO.1 CIRCUIT FOR OPEN CIRCUIT
7
KS No.1 and PCM connectors are
disconnected.
Turn the ignition switch off.
KS No.1 terminal A (wiring
harness-side) and body
ground
KS No.1 terminal B (wiring
harness-side) and body
ground
terminals, then go to Step 8.
No Go to the next step.
YesIf the short to ground circuit could be
detected:
Repair or replace the
wiring harness for a
possible short to ground.
If the short to ground circuit could not be
detected:
Replace the PCM (short to
ground in the PCM internal
circuit).
(See PCM
REMOVAL/INSTALLATION
[13B-MSP].)
Go to Step 8.
No Go to the next step.
YesReplace the KS No.1, then go to Step 8.
(See KNOCK SENSOR (KS)
REMOVAL/INSTALLATION
No Go to the next step.
YesRepair or replace the connector and/or
terminals, then go to Step 8.
No Go to the next step.
YesGo to the next step.
No Repair or replace the wiring harness for a
possible open circuit, then go to the next
step.
[13B-MSP].)