Mazda 3 Workshop Manual page 211

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Purge solenoid hoses improper connection
• Variable valve timing control system improper operation
• PCV valve malfunction
Diagnostic procedure
STEP INSPECTION
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
• Has FREEZE FRAME DATA been
recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
• Verify related service repair information
2
availability.
• Is any related repair information
available?
VERIFY RELATED PENDING CODE OR
STORED DTC
• Turn the ignition switch off, then to the
ON position (Engine off).
3
• Verify the related PENDING CODE or
stored DTCs.
• Are other DTCs present?
IDENTIFY TRIGGER DTC FOR FREEZE
FRAME DATA
4
• Is DTC P2178 on FREEZE FRAME
DATA?
VERIFY CURRENT INPUT SIGNAL
STATUS (IGNITION SWITCH TO
ON/IDLE)
• Access ECT, MAF, TP and VSS PIDs
5
using WDS or equivalent.
• Is there any signal that is far out of
specification when KOER?
VERIFY CURRENT INPUT SIGNAL
STATUS UNDER TROUBLE CONDITION
6
• Inspect same PIDs as Step 4 while
simulating FREEZE FRAME DATA
condition.
Downloaded from
Yes Go to the next step.
No
Yes
No Go to the next step.
Yes
No
Yes Go to the next step.
No
Yes
No Go to the next step.
Yes
No Go to the next step.
https://carmanualshub.com/
ACTION
Record the FREEZE FRAME DATA on the
repair order, then go to the next step.
Perform repair or diagnosis according to the
available repair information.
• If the vehicle is not repaired, go to the next
step.
• If misfire DTC is present, go to Step 8.
• If other DTC is present, go to the appropriate
DTC inspection.
(See DTC TABLE [Z6].)
• If drive ability concern is present, go to Step 8.
• If other, go to the next step.
Go to the FREEZE FRAME DATA DTC
inspection.
(See DTC TABLE [Z6].)
Inspect suspected sensor and excessive
resistance in related wiring harnesses.
Repair or if necessary.
Then go to Step 16.
Inspect suspected sensor and related wiring
harnesses repair or replace it.
Then go to Step 16.
- automotive repair manuals website