Mazda RX-8 Workshop Manual page 691

12 Access the TP REL PID.
(See ON-BOARD DIAGNOSTIC
TEST [13B-MSP].)
Crank the engine with the
accelerator pedal released.
Does the TP REL PID indicate the
closed throttle position?
13 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].)
14 Attempt to start the engine at
part throttle.
Does the engine run smoothly at
part throttle?
15 Access the RPM PID.
(See ON-BOARD DIAGNOSTIC
TEST [13B-MSP].)
Yes Go to the next step.
No Inspect the following:
TP sensor
(See
INSPECTION
Wiring harnesses and connectors between
PCM and throttle body
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:
PCM terminal 1AV—APP
sensor terminal B
THROTTLE POSITION (TP) SENSOR
[13B-MSP].)
PCM terminal 2AO—
throttle body terminal E
PCM terminal 2AK—
throttle body terminal F
PCM terminal 2P—throttle
body terminal C
PCM terminal 2AL—
throttle body terminal D
ENGINE COOLANT TEMPERATURE
[13B-MSP].)