Mazda CX-9 Grand Touring 2009 Manual page 1114

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
DIAGNOSTIC PROCEDURE
DTC P053A (MZI-3.7) DIAGNOSTIC PROCEDURE
STEP
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
Has FREEZE FRAME DATA been
recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
2
Verify related Service Bulletins and/or
on-line repair information availability.
Is any related Service Bulletins available?
INSPECT PCV VALVE HEATER
CONTROL AND PCV VALVE HEATER
FITTING CONNECTOR FOR POOR
CONNECTION
Turn the ignition switch off.
3
Disconnect PCV valve heater control and
PCV valve heater fitting connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Are there any malfunction?
INSPECT POWER SUPPLY CIRCUIT
FOR OPEN CIRCUIT
Turn the ignition switch to the ON
position (Engine off).
Inspect the voltage between the following
circuit:
4
PCV valve heater control terminal
A (wiring harness-side) and body
ground
PCV valve heater fitting terminal A
(wiring harness-side) and body
ground
Are there voltage B+?
INSPECT PCV VALVE HEATER
CONTROL AND PCV VALVE HEATER
FITTING CIRCUIT FOR SHORT TO
POWER SUPPLY
2008 Mazda CX-9 Grand Touring
INSPECTION ACTION
Yes Go to the next step.
Record FREEZE FRAME DATA on the
No
repair order, then go to the next step.
Perform repair or diagnosis according to the
available Service Bulletins.
Yes
If the vehicle is not repaired, go to the
next step.
No Go to the next step.
Repair or replace suspected part, then go to
Yes
Step 10.
No Go to the next step.
Yes Go to the next step.
Repair or replace suspected part, then go to
No
Step 10.