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
3
Access and monitor PSP and TR
PIDs.
Are PIDs values normal?
(See
PCM INSPECTION [MZI-
3.7]
.)
No
If the TR PID is not normal:
z
Inspect TR switch and related wiring
harness for vibration or intermittent
open/short circuit.
If the PSP PID is not normal:
z
Inspect power steering switch and related
wiring harness for vibration or intermittent
open/short circuit.
4
Is there air leakage felt or heard at
intake-air system components while
racing engine to higher speed?
Yes
Repair or replace parts if necessary.
No
Inspect the following:
z
Electronic throttle control system
operation
z
Accelerator pedal position sensor
5
z
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
Information and perform repair or diagnosis.
z
If vehicle is repaired, troubleshooting completed.
z
If vehicle is not repaired or additional diagnostic information is not available,
replace the PCM.
(See
PCM REMOVAL/INSTALLATION [MZI-3.7]
.)
10
LOW IDLE/STALLS DURING DECELERATION
DESCRIPTION
z
Engine stops unexpectedly at the beginning of deceleration or recovery from
deceleration.
z
Vacuum leakage
z
Improper operation of electronic throttle control system
z
Air leakage from intake-air system
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:10:05 AM
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