Mazda CX-9 Grand Touring 2007 Manual page 863

2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
DIAGNOSTIC PROCEDURE
STEP INSPECTION
1 Does the engine idle roughly?
2 Turn off the A/C switch and fan switch.
Does the A/C magnetic clutch engage?
3 Verify the following:
Proper routing of and no damage
to vacuum lines
No air leakage from intake-air
system
Are all items normal?
4 Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON
position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
5 Perform the electronic throttle control
system operation inspection.
(See ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-
2007 Mazda CX-9 Grand Touring
Accelerator pedal position sensor or related circuit malfunction
Accelerator pedal position sensor misadjustment
TP sensor or related circuit malfunction
MAF sensor or related circuit malfunction
Brake switch or related circuit malfunction
TR switch or related circuit malfunction
Improper A/C magnetic clutch operation
RESULTS ACTION
Yes Go to symptom troubleshooting "No.8
Engine runs rough/rolling idle".
(See NO.8 ENGINE RUNS
ROUGH/ROLLING IDLE [MZI-
3.5].)
No Go to the next step.
Yes Go to symptom troubleshooting
"No.24 A/C is always on or A/C
compressor runs continuously."
(See NO.24 A/C IS ALWAYS ON
OR A/C COMPRESSOR RUNS
CONTINUOUSLY [MZI-3.5].)
No Go to the next step.
Yes Go to the next step.
No Service if necessary.
Repeat Step 3.
Yes DTC is displayed:
Go to the appropriate DTC inspection.
(see DTC TABLE [MZI-3.5] .)
No No DTC is displayed:
Go to the next step.
Yes Go to the next step.
No Repair or replace the malfunctioning
part according to electronic throttle
control system operation inspection