Mazda RX-8 Manual page 710

INSPECT IGNITION COIL POWER
CIRCUIT FOR OPEN CIRCUIT OR
SHORT TO GND
Turn the ignition switch to the ON
•
9
position (Engine off).
Measure the voltage between
•
ignition coil terminal C (wiring
harness-side) and body GND.
Is the voltage B+ ?
•
INSPECT IGNITION COIL
Inspect the ignition coil.
•
10
(See IGNITION COIL
INSPECTION .)
Is there any malfunction?
•
VERIFY CURRENT INPUT SIGNAL
STATUS OF MAF SENSOR
Connect the WDS or equivalent to
•
the DLC-2.
Start the engine.
•
11
Access the MAF PID.
•
Verify that the MAF PID changes
•
quickly according to race the engine
RPM.
Is the PID normal?
•
INSPECT INTAKE-AIR SYSTEM FOR
EXCESSIVE AIR SUCTION
Visually inspect for loosen, cracks
•
12
or damages hoses in intake-air
system.
Is there any malfunction?
•
INSPECT FUEL LINE PRESSURE
Perform the "FUEL LINE
•
PRESSURE INSPECTION".
13
(See FUEL LINE PRESSURE
INSPECTION .)
Yes Go to the next step.
Repair or replace the wiring harness for a possible
No
open circuit or short to GND, then go to Step 22.
Replace the ignition coil, then go to Step 22.
Yes
(See IGNITION COIL
REMOVAL/INSTALLATION .)
No Go to the next step.
Yes Go to the next step.
Replace the MAF/IAT sensor, then go to Step 22.
No (See MASS AIR FLOW (MAF)/INTAKE AIR
TEMPERATURE (IAT) SENSOR
REMOVAL/INSTALLATION .)
Repair or replace the malfunctioning part, then go to
Yes
Step 22.
No Go to the next step.
If the fuel line pressure is too low, go to the
•
next step.
Yes If the fuel line pressure is too high, replace the
•
fuel pump unit, then go to Step 22.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION .)
(w) Engine Diagnostics & Control
Page 147