Mazda RX-8 Manual page 898

VERIFY CURRENT INPUT SIGNAL
STATUS OF REAR HO2S
Connect the WDS or equivalent to
•
the DLC-2.
Start the engine and warm it up
•
completely.
Access the O2S12 PID.
•
Read the O2S12 PID under
•
following accelerator pedal
condition (in PARK or NEUTRAL).
More than 0.55 V when
accelerator pedal is suddenly
depressed (rich condition).
Less than 0.55 V just after
release of accelerator pedal
(lean condition)
Is the PID normal?
•
VERIFY CURRENT INPUT SIGNAL
STATUS
Connect the WDS or equivalent to
•
the DLC-2.
Verify the following PIDs.
•
(See PCM INSPECTION .)
6
APP
ECT
MAF
TP
VSS
Are the PIDs normal?
•
7
Visually inspect for the the gas leakage between
TWC and rear HO2S.
If there is no leakage, replace the rear HO2S.
•
No
(See REAR HEATED OXYGEN SENSOR
(HO2S) REMOVAL/INSTALLATION .)
Then go to Step 24.
Yes Go to the next step.
Inspect the malfunctioning part according to the
inspection results.
No
Then go to Step 24.
Yes Go to the next step.
(w) Engine Diagnostics & Control
Page 335