Mazda CX-9 Grand Touring 2009 Manual page 1402

WARNING:
8. Drive the vehicle approx. 2,000 rpm for 30 sec. or more.
If there is no vacuum, inspect the following:
Wiring harness and connector (Main relay-purge solenoid valve-PCM terminal 1BC)
Purge solenoid valve
MAF, APP1, APP2, APP3, TP_REL and LOAD PISs
If there is vacuum, inspect the following:
Vacuum hose (Purge solenoid valve-charcoal canister)
A/C CUT-OFF CONTROL SYSTEM INSPECTION
1. Start the engine.
2. Turn the A/C switch and the fan switch on.
3. Verify that the A/C compressor magnetic clutch actuates.
If it does not actuate, go to symptom troubleshooting "No.23 A/C does not work sufficiently".
4. Fully open the throttle valve and verify that the A/C compressor magnetic clutch does not actuate for 2-5
s.
If it actuates, inspect as follows:
A/C relay
Open or short to GND circuit in wiring harness and connectors (Ignition switch-A/C relay-
PCM terminal 1N)
A/C related parts
APP1, APP2, APP3 PIDs
COOLING FAN CONTROL SYSTEM INSPECTION
1. Connect the M-MDS to the DLC-2.
2. Start the engine and warm it up to normal operating temperature.
3. Perform the KOER self-test. (See KOEO/KOER SELF TEST [MZI-3.7] .)
4. Verify that the DTC P0480 is not shown and the cooling fan operates during the KOER self-test.
If DTC P0480 is shown, perform the DTC troubleshooting procedure.
(See DTC TABLE [MZI-3.7] .)
If the cooling fans do not operate, proceed to the following:
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
When the dynamometer or chassis roller is operating, there is a
possibility that the operator may come into contact with or be
caught up in the rotating parts, leading to serious injuries or
death. When performing work while the dynamometer or
chassis roller is operating, be careful not to come into contact
with or caught up in any of the rotating parts.