DIAGNOSTIC PROCEDURE
DTC P053A (MZI-3.7) 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.
INSPECT PCV VALVE HEATER
CONTROL AND PCV VALVE HEATER
FITTING CIRCUIT FOR SHORT TO
POWER SUPPLY
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:39 AM
Page 250
© 2005 Mitchell Repair Information Company, LLC.
