DIAGNOSTIC PROCEDURE
DTC P053A (MZI-3.5) DIAGNOSTIC PROCEDURE
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA
HAS BEEN RECORDED
z
Has FREEZE FRAME DATA
been recorded
yes
go to the next step.
No
Record FREEZE FRAME DATA on the
repair order, then go to the next step.
2
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
z
Verify related Service Bulletins
and/or on-line repair information
availability.
z
Is any related Service Bulletins
available?
Yes
Perform repair or diagnosis according to
the available Service Bulletins.
z
If the vehicle is not repaired, go to
the next step.
No
Go to the next step.
3
INSPECT PCV VALVE HEATER
CONTROL AND PCV VALVE
HEATER FITTING CONNECTOR
FOR POOR CONNECTION
z
Turn the ignition switch off.
z
Disconnect PCV valve heater
control and PCV valve heater
fitting connector.
z
Inspect for poor connection (such
as damaged/pulled-out pins,
corrosion).
z
Are there any malfunction?
Yes
Repair or replace suspected part, then go to
Step 10.
No
Go to the next step.
4
INSPECT POWER SUPPLY
CIRCUIT FOR OPEN CIRCUIT
z
Turn the ignition switch to the ON
position (Engine off).
z
Inspect the voltage between the
following circuit:
{
PCV valve heater control
terminal A (wiring harness-
side) and body ground
{
PCV valve heater fitting
terminal A (wiring harness-
side) and body ground
z
Are there voltage B+?
Yes
Go to the next step.
No
Repair or replace suspected part, then go to
Step 10.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:34 AM
Page 267
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