Mazda CX-7 2007 Workshop Manual page 1002

SYMPTOM TROUBLESHOOTING [AW6A-EL, AW6AX-EL]
NO.21 NOISE OCCURS AT IDLE WHEN VEHICLE IS STOPPED IN D RANGE, OR IN R POSITION[AW6A-EL,
AW6AX-EL]
21 Noise occurs at idle when vehicle is stopped in D range, or in R position
• Transaxle is noisy in driving ranges when vehicle idling.
DESCRIPTION
• Although the malfunction is basically the same as No.20 "NOISE OCCURS AT IDLE WHEN VEHICLE
POSSIBLE
IS STOPPED IN ALL POSITIONS/RANGES", other causes may include selector lever position disparity
CAUSE
or TR switch position disparity.
End Of Sie
NO.22 NO ENGINE BRAKING IN 1GR POSITION OF M RANGE[AW6A-EL, AW6AX-EL]
22 No engine braking in 1GR position of M range
• Engine speed drops to idle but the vehicle coasts when the accelerator pedal is released during
cruising at medium to high speeds.
DESCRIPTION
• Engine speed drops to idle but the vehicle coasts when accelerator pedal is released when in M range
(1GR) at low vehicle speed.
• Clutch slippage, burnt (B2 brake)
— Line pressure low
• VSS malfunction
• Input/turbine speed sensor malfunction
• Shift solenoid A or B malfunction
• Sensor GND malfunction
POSSIBLE
• Control valve body malfunction
CAUSE
Note
• Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board
Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See 05-03-3 BASIC
INSPECTION[AW6A-EL, AW6AX-EL].)
Diagnostic procedure
STEP
• Do the following symptoms occur
1
concurrently?
— Engine flares up or slips during
acceleration
— Engine flares up or slips when shifting
• Stop the engine.
2
• Inspect following solenoids.
(See 05-17-20 SOLENOID VALVE
INSPECTION[AW6A-EL, AW6AX-EL].)
— Shift solenoid A
— Shift solenoid B
• Are the normal?
• Verify test results.
3
— If normal, return to the diagnostic index to service any additional symptoms.
— If malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform
repair or diagnosis.
• If the vehicle is repaired, troubleshooting completed.
• If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.
End Of Sie
05-03–24
INSPECTION
Yes Go to No.14 "ENGINE FLARES UP OR SLIPS WHEN
UPSHIFTING OR DOWNSHIFTING", or No.15 "ENGINE
FLARES UP OR SLIPS WHEN ACCELERATING
VEHICLE".
No Go to the next step.
Yes Inspect the ATF condition.
• If a large amount of metal specks are found, replace the
transaxle.
(See 05-17-29 AUTOMATIC TRANSAXLE REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
• If a large amount of metal specks are not found, replace
the control valve body.
(See 05-17-38 CONTROL VALVE BODY REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
No Replace the control valve body.
(See 05-17-38 CONTROL VALVE BODY REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
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