Mazda RX-8 Workshop Manual page 283

Turn the ignition switch off.
Disconnect the throttle body connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Is there any malfunction?
INSPECT TP SENSOR NO.2 CIRCUIT FOR SHORT TO
4
GROUND
Throttle body connector is disconnected.
Turn the ignition switch off.
Inspect for continuity between the following
circuits:
Is there continuity?
INSPECT PCM CONNECTOR FOR POOR CONNECTION
5
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 TP SENSOR NO.2 CIRCUIT FOR OPEN
6 CIRCUIT
Throttle body and PCM connectors are
disconnected.
Turn the ignition switch off.
Inspect for continuity between the following
circuits:
Throttle body terminal E
(wiring harness-side) and
body ground
Throttle body terminal D
(wiring harness-side) and
body ground
Throttle body terminal E
(wiring harness-side) and
PCM terminal 2AO (wiring
harness-side)
Throttle body terminal D
(wiring harness-side) and
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.
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 Step 8.