Mazda RX-8 Workshop Manual page 704

12 Access the ECT PID.
(See ON-BOARD DIAGNOSTIC
TEST [13B-MSP].)
Does the ECT PID indicate the
proper engine coolant
temperature?
(See PCM INSPECTION [13B-
MSP].)
13 Will the engine start and run
smoothly at part throttle?
14 Access the RPM PID.
(See ON-BOARD DIAGNOSTIC
TEST [13B-MSP].)
Does the RPM PID indicate the
engine speed during engine
cranking?
15 Visually inspect the eccentric
shaft position sensor and the
Yes Go to the next step.
No Inspect the following:
ECT sensor
(See
(ECT) SENSOR INSPECTION
Open or short circuit between ECT sensor
and PCM terminal 2AH or 2AY
Yes Inspect the Drive-by-wire Control System Inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION
[13B-MSP].)
No Go to the next step.
Yes Go to the next step.
No Inspect the following:
Open or short circuit in eccentric shaft
position sensor
Open or short circuit between eccentric
shaft position sensor and PCM terminal
2AG or 2AP
Open or short circuit in eccentric shaft
position sensor harnesses
Yes Go to the next step.
PCM terminal 2AK—
throttle body terminal F
PCM terminal 2P—throttle
body terminal C
PCM terminal 2AL—
throttle body terminal D
ENGINE COOLANT TEMPERATURE
If the eccentric shaft
position sensor and the
wiring harness are
normal, go to the next
step.
[13B-MSP].)