Mazda RX8 - Page 74

Measure the voltage at the PCM
terminal 4P, 2O (MT), 4F (MT)
and TCM terminal 2E (AT).
(See PCM INSPECTION .)
Are the voltages normal?
No
If the PCM terminal 4P voltage is not as
specified:
Inspect the brake switch.
(See BRAKE SWITCH INSPECTION .)
If the PCM terminal 2O voltage is not as
specified (MT):
Inspect the neutral switch.
(See NEUTRAL SWITCH INSPECTION .)
If the PCM terminal 4F voltage is not as
specified (MT):
Inspect the CPP switch.
(See CLUTCH PEDAL POSITION (CPP)
SWITCH INSPECTION .)
If the TCM terminal 2E voltage is not as
specified (AT):
Inspect the TR switch.
(See TRANSMISSION RANGE (TR)
SWITCH INSPECTION .)
Yes Go to the next step.
10
Turn the ignition switch off.
Disconnect the fuel line quick
release connector and install the
fuel gauge to the fuel line.
Inspect the fuel line pressure
while the engine running.
(See FUEL LINE PRESSURE
INSPECTION .)
Is the fuel line pressure normal?
No
Zero or low:
Inspect for clogged fuel line.
If normal, replace the fuel pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION .)
High:
Replace the fuel pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION .)
11 Yes Go to the next step.
(w) RX8-Engine Troubleshooting
Page 74