Mazda CX-9 Grand Touring 2009 Manual page 1115

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Turn the ignition switch to the ON
position (Engine off).
Inspect for continuity between the
following circuit:
PCV valve heater control terminal
5
B (wiring harness-side) and body
ground
PCV valve heater fitting terminal B
(wiring harness-side) and body
ground
Are there voltage B+?
INSPECT PCV VALVE HEATER
CONTROL AND PCV VALVE HEATER
FITTING CIRCUIT FOR SHORT TO
GROUND
Inspect for continuity between the
following circuit:
6
PCV valve heater control terminal
B (wiring harness-side) and body
ground
PCV valve heater fitting terminal B
(wiring harness-side) and body
ground
Are there continuity?
INSPECT PCM CONNECTOR FOR POOR
CONNECTION
Turn the ignition switch off.
7
Disconnect PCM connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Are there any malfunction?
INSPECT PCV VALVE HEATER
CONTROL AND PCV VALVE HEATER
FITTING FOR OPEN CIRCUIT
Inspect for continuity between the
8
following circuit:
PCV valve heater control terminal
B (wiring harness-side) and PCM
terminal 2BL (wiring harness-side)
PCV valve heater fitting B (wiring
2008 Mazda CX-9 Grand Touring
Repair or replace suspected part, then go to
Yes
Step 10.
No
Repair or replace suspected part, then go to
Yes
Step 10.
No
Repair or replace suspected part, then go to
Yes
Step 10.
No
Yes Go to the next step.
No
Go to the next step.
Go to the next step.
Go to the next step.
Repair or replace suspected part, then go to
Step 10.