z
Is there any malfunction?
6
VERIFY FUEL TANK PRESSURE
SENSOR CIRCUIT FOR OPEN
CIRCUIT
z
Inspect for continuity between the
following circuits:
{
Fuel tank pressure sensor
connector terminal A
(harness-side) and PCM
connector terminal 1AB.
{
Fuel tank pressure sensor
connector terminal B
(harness-side) and PCM
connector terminal 1AL
z
Are there continuity?
Yes
Go to the next step.
No
Repair or replace suspected part, then go to
Step 9.
7
INSPECT FUEL TANK PRESSURE
SENSOR SIGNAL CIRCUIT AND
POWER CIRCUIT FOR SHORT
EACH OTHER
z
Turn the ignition switch off.
z
Disconnect the fuel tank pressure
sensor and PCM connector,
z
Measure resistance between PCM
connector terminal 1 U (harness-
side) and CM connector terminal
1AB (harness-side).
z
Is the resistance more than 1 0
kilohms?
Yes
Go to the next step.
No
Repair or replace suspected part, then go to
Step 9.
8
INSPECT FUEL TANK PRESSURE
SENSOR
z
Inspect the fuel tank pressure
sensor.
(see
FUEL TANK PRESSURE
SENSOR INSPECTION [MZI-
3.5]
.)
z
Is the fuel lank pressure sensor
normal?
Yes
Go to the next step.
No
Replace the evaporative hose component,
then go to the next step.
(see
FUEL TANK
REMOVAL/INSTALLATION [MZI-
3.5]
.)
9
VERIFY TROUBLESHOOTING OF
DTC P0453 COMPLETED
Yes
Replace the PCM, then go to the next step.
(see
PCM
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:33 AM
Page 235
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