Mazda 3 Workshop Manual page 399

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
VERIFY CURRENT INPUT SIGNAL
STATUS
• Connect the WDS or equivalent to the DLC-
2.
• Verify the following PIDs.
(See PCM INSPECTION
6
- ECT
- MAF
- TP
- VSS
• Are the PIDs normal?
VERIFY CURRENT INPUT SIGNAL
STATUS UNDER FREEZE FRAME DATA
CONDITION
• Connect the WDS or equivalent to the DLC-
2.
• Verify the following PIDs under the
FREEZE FRAME DATA condition.
7
(See PCM INSPECTION
- ECT
- MAF
- TP
- VSS
• Are the PIDs normal?
VERIFY CURRENT INPUT SIGNAL
STATUS OF FRONT HO2S
• Connect the WDS or equivalent to the DLC-
2.
• Start the engine and warm it up completely.
• Access O2S11 PID.
• Read O2S11 PID under following
8
accelerator pedal condition (in NEUTRAL).
- More than 0.45 V when accelerator
pedal is suddenly depressed (rich
condition).
- Less than 0.45 V just after release
of accelerator pedal (lean condition)
• Is the PID normal?
9
Downloaded from
[LF].)
[LF].)
https://carmanualshub.com/
Yes Go to the next step.
Inspect the malfunctioning part according to
the inspection results.
No
Then go to Step 17.
Yes Go to the next step.
Inspect the malfunctioning part according to
the inspection results.
No
Then go to Step 17.
Yes Go to the next step.
Visually inspect for the exhaust gas leakage
between the exhaust manifold and front
HO2S.
• If there is no leakage, replace front HO2S.
No
(See HEATED OXYGEN SENSOR (HO2S)
REMOVAL/INSTALLATION
Then go to Step 17.
Yes Go to the next step.
- automotive repair manuals website
[LF].)