Mazda 3 Workshop Manual page 417

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Fuel pump malfunction
• EGR valve stuck open
• VTCS improper operation
• Purge solenoid valve improper operation
• Purge solenoid valve malfunction (stuck open)
• Purge solenoid hoses improper connection
• PCV valve malfunction
Diagnostic procedure
STEP
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 DTCS
• Turn ignition switch to off, then the ON
position (Engine off).
3
• Verify related pending code or stored
DTCs.
• Is other DTC present?
IDENTIFY TRIGGER DTC FOR FREEZE
FRAME DATA
4
• Is DTC P2178 on FREEZE FRAME
DATA?
VERIFY CURRENT INPUT SIGNAL
STATUS (KEY 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 key is ON and engine
runs?
VERIFY CURRENT INPUT SIGANL
6
STATUS UNDER TROUBLE CONDITION
Downloaded from
INSPECTION
https://carmanualshub.com/
ACTION
Yes Go to the next step.
Record the FREEZE FRAME DATA on the
No
repair order, then go to the next step.
Perform repair or diagnosis according to the
available repair information.
Yes
• If the vehicle is not repaired, go to the next
step.
No Go to the next step.
If misfire DTC is present, go to Step 8.
If other DTC is present, go to appropriate DTC
Yes
troubleshooting procedure.
(See DTC TABLE [LF].)
If drivability concern is present, go to Step 8.
No
If not, go to the next step.
Yes Go to the next step.
Go to troubleshooting procedures for DTC on
No
FREEZE FRAME DATA.
Inspect suspected sensor and excessive
resistance in related wiring harnesses.
Yes
Repair or if necessary.
Then go to Step 15.
No Go to the next step.
Inspect suspected sensor and related wiring
Yes
harnesses, repair or replace it.
- automotive repair manuals website