Mazda CX-9 Grand Touring 2009 Manual page 1339

Access and monitor PSP and TR
PIDs.
3 Are PIDs values normal?
(See PCM INSPECTION [MZI-
3.7] .)
Is there air leakage felt or heard at
4 intake-air system components while
racing engine to higher speed?
Verify test results.
If normal, return to diagnostic index to service any additional symptoms.
(See SYMPTOM DIAGNOSTIC INDEX [MZI-3.7].)
If malfunction remains, inspect related Service Bulletins and/or On-line Repair
5
Information and perform repair or diagnosis.
NO.10 LOW IDLE/STALLS DURING DECELERATION [MZI-3.7]
NO.10 LOW IDLE/STALLS DURING DECELERATION (MZI-3.7) DETECTION CONDITIONS AND
POSSIBLE CAUSES
10 LOW IDLE/STALLS DURING DECELERATION
DESCRIPTION
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
No
Yes
No
If vehicle is repaired, troubleshooting completed.
If vehicle is not repaired or additional diagnostic information is not available,
replace the PCM.
(See PCM REMOVAL/INSTALLATION [MZI-3.7] .)
Engine stops unexpectedly at the beginning of deceleration or recovery from
deceleration.
Vacuum leakage
Improper operation of electronic throttle control system
Air leakage from intake-air system
If the TR PID is not normal:
Inspect TR switch and related wiring
harness for vibration or intermittent
open/short circuit.
If the PSP PID is not normal:
Inspect power steering switch and related
wiring harness for vibration or intermittent
open/short circuit.
Repair or replace parts if necessary.
Inspect the following:
Electronic throttle control system
operation
Accelerator pedal position sensor