Mazda 6 2002 - Page 502

K128
TROUBLESHOOTING
NO.20 NOISE OCCURS AT IDLE WHEN VEHICLE IS STOPPED IN ALL POSITIONS/RANGES
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Diagnostic procedure
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NO.21 NOISE OCCURS AT IDLE WHEN VEHICLE IS STOPPED IN D, S, L RANGES, OR IN R POSITION
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20 Noise occurs at idle when vehicle is stopped in all positions/ranges
DESCRIPTION • Transaxle noisy in all positions and ranges when vehicle is idling.
POSSIBLE
CAUSE
• The malfunction is in the oil pump which causes a high-pitched noise to be emitted from the transaxle at
idle.
Note
• If a noise is emitted during shifting only, the malfunction is in shift solenoid D, E or shift solenoid A, B,
C. If a noise is emitted during shifting at certain gears only or during deceleration only, it is gear
noise.
• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.
STEP INSPECTION ACTION
1 Inspect engine condition.
Is any engine concern (i. e. rough idle)?
Yes Go to appropriate symptom troubleshooting. (See Section
F.)
No Go to next step.
2 Does noise stop when solenoid connector is
disconnected?
Yes Go to next step.
No Overhaul control valve body and repair or replace any
defective parts. If problem remains, overhaul transaxle and
repair or replace any defective parts. (See ATX workshop
manual (FN4A-EL) [1623-10-98E].) (See ATX workshop
manual supplement (FN4A-EL) [1746-1*-02C].)
3 Check the value at the following PIDs using the
WDS or equivalent. (See F45 PCM
INSPECTION.)
• TP
• VSS
• TSS
Are PID values okay?
Yes Go to next step.
No Repair or replace any defective parts.
4 Disconnect PCM. Is resistance between ground
terminal at PCM connector and body ground
less than 5.0 ohms?
Yes Go to next step.
No Repair open ground circuit. Reconnect PCM.
5 Check LPS PID value.
Is LPS PID value okay?
(See F45 PCM INSPECTION.)
Yes Overhaul control valve body and repair or replace any
defective parts. If problem remains, overhaul transaxle and
repair or replace any defective parts. (See ATX workshop
manual (FN4A-EL) [1623-10-98E].) (See ATX workshop
manual supplement (FN4A-EL) [1746-1*-02C].)
No Repair or replace any defective parts.
21 Noise occurs at idle when vehicle is stopped in D, S, L ranges, or in R position
DESCRIPTION • Transaxle noisy in driving ranges when vehicle idling.
POSSIBLE
CAUSE
• Although the malfunction is basically the same as No.20 "Noise occurs at idle when vehicle is stopped
in all positions/ranges", other causes may be selector lever position disparity or TR switch position
disparity.