A/C Cut-Off Control System Inspection; Cooling Fan Control System Inspection - Mazda CX-7 2007 Workshop Manual

SYMPTOM TROUBLESHOOTING [L3 WITH TC]
10. Set the vehicle on the dynamometer or chassis roller.
Warning
• 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
contact or be caught up in any of the rotating parts.
11. Drive vehicle at an engine speed to approx. 2000 rpm for 30 s or more.
12. Put a finger to the purge solenoid valve and verify that there is no vacuum applied during Step 2.
• If there is no vacuum, inspect the following:
— Wiring harness and connector (Main relay—purge solenoid valve—PCM terminal 2AB)
— Purge solenoid valve
— MAF, APP1, APP2, TP_REL and LOAD PIDs
• 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 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 ground circuit in the wiring harness and connectors (Ignition switch—A/C relay—PCM
terminal 1I)
— A/C related parts
— APP1, APP2 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.
(See01-02-10 KOEO/KOER SELF TEST[L3 WITH TC].)
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.
(See01-02-152 DTC P0480[L3 WITH TC].)
• If the cooling fans do not operate, proceed to the following:
(1) Verify the clicking sound of the cooling fan relay when the ignition switch is turned from the off to the ON
position.
(2) If there is no the clicking sound, inspect the cooling fan relay for an open circuit between the ignition switch
and the cooling fan relay.
• If there is a clicking sound, go to the next step.
• Inspect the following parts in the indicated order in accordance with fan operation conditions.
Cooling fans do not operate
— Open circuit between the fan control module and the cooling fan relay
— Open circuit between fan control module and ground
— Poor connection of the fan control module connector
— Fan control module
(See01-12-14 FAN CONTROL MODULE INSPECTION[L3 WITH TC].)
Cooling fan motor No.1 does not operate
— Open or short to ground circuit between the fan control module and cooling fan motor No.1
— Poor connection of the fan control module connector or cooling fan motor No.1 connector
— Cooling fan motor No.1
(See01-12-14 FAN MOTOR INSPECTION[L3 WITH TC].)
— Fan control module
(See01-12-14 FAN CONTROL MODULE INSPECTION[L3 WITH TC].)
Cooling fan motor No.2 does not operate
— Open or short to ground circuit between the fan control module and the cooling fan motor No.2
— Poor connection of the fan control module connector or the cooling fan motor No.1 connector
— Cooling fan motor No.2
(See01-12-14 FAN MOTOR INSPECTION[L3 WITH TC].)
— Fan control module
(See01-12-14 FAN CONTROL MODULE INSPECTION[L3 WITH TC].)
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