Mazda RX-8 Workshop Manual page 451

Turn the ignition switch off.
Disconnect the APP sensor connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Is there any malfunction?
INSPECT PCM CONNECTOR FOR POOR CONNECTION
4
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 APP SENSOR NO.2 SIGNAL CIRCUIT FOR
5 SHORT TO POWER SUPPLY
APP sensor and PCM connectors are
disconnected.
Turn the ignition switch to the ON position
(engine off).
Measure the voltage between APP sensor
terminal C (wiring harness-side) and body
ground.
Is the voltage B+?
INSPECT APP SENSOR NO.2 GROUND CIRCUIT FOR OPEN
6
CIRCUIT
APP sensor and PCM connectors are
disconnected.
Turn the ignition switch off.
Inspect for continuity between APP sensor
terminal B (wiring harness-side) and PCM
terminal 1AV (wiring harness-side).
Is there continuity?
INSPECT APP SENSOR NO.2
7
Inspect the APP sensor No.2.
(See ACCELERATOR PEDAL POSITION (APP)
SENSOR INSPECTION
Is there any malfunction?
VERIFY TROUBLESHOOTING OF DTC P2128 COMPLETED
8
Make sure to reconnect all disconnected
connectors.
[13B-MSP].)
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.
YesRepair or replace the wiring harness for a
possible short to power supply, 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.
YesReplace the accelerator pedal, then go to
the next step.
(See ACCELERATOR PEDAL
REMOVAL/INSTALLATION
No Go to the next step.
YesReplace the PCM, then go to the next
step.
[13B-MSP].)