Mazda 2002 6 Workshop Manual page 538

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NO.18 EXCESSIVE SHIFT SHOCK IS FELT WHEN UPSHIFTING AND DOWNSHIFTING
18 Excessive shift shock is felt when upshifting and downshifting
• Excessive shift shock felt when depressing accelerator pedal to accelerate at upshifting. During
DESCRIPTION
cruising, excessive shift shock is felt when depressing accelerator pedal at downshifting.
• Shift shock may worsen when fail-safe is operating. The shift shock has worsened if the TP sensor,
input/turbine speed sensor, or vehicle speed sensor signal malfunctions.
1. Clutch slipped, burned (Forward clutch, 2–4 brake band, 3–4 clutch)
• Line pressure low, high
• Shift solenoid D malfunction
• Shift solenoid E malfunction
• Shift solenoid A malfunction
• Shift solenoid B malfunction
• Shift solenoid C malfunction
• Pressure control solenoid malfunction
• Accelerator cable misadjustment
• Control valve body malfunction
• Body GND malfunction
POSSIBLE
2. Signal malfunction
CAUSE
• Transaxle temperature sensor malfunction
• Vehicle speed sensor malfunction
• Sensor GND malfunction
• TP sensor malfunction
• Input/turbine speed sensor malfunction
3. Poor hydraulic operation (Malfunction in range change)
• Pressure switch malfunction
• Forward accumulator malfunction
• Servo apply accumulator malfunction
Note
• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.
Diagnostic procedure
STEP
1 Perform the stall test. (See
stall speed okay?
2 Check the value at the following PIDs using the
WDS or equivalent. (See
INSPECTION.)
• TP V
Is PID value okay?
3 Disconnect PCM. Is resistance between ground
terminal at PCM connector and body ground
less than 5.0 ohms?
4 Check LPS PID value.
Is LPS PID value okay?
(See F–45 PCM INSPECTION.)
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NO.19 EXCESSIVE SHIFT SHOCK ON TORQUE CONVERTER CLUTCH (TCC)
19 Excessive shift shock on torque converter clutch (TCC)
• Strong shock is felt when TCC engaged.
DESCRIPTION
• The troubleshooting flow is the same as No.16 "Judder upon TCC operation".
POSSIBLE
CAUSE
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TROUBLESHOOTING
INSPECTION
K–7 Stall Test.) Is
F–45 PCM
Yes Go to next step.
No Repair or replace any defective parts.
Yes Go to next step.
No Repair or replace any defective parts.
Yes Go to next step.
No Repair open ground circuit. Reconnect PCM.
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.
A6E568001030W22
ACTION
A6E568001030W23
K–127
K