Mazda 6 2002, Workshop Manual

Page: 538 / 1248

TROUBLESHOOTING
K–127
K
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NO.18 EXCESSIVE SHIFT SHOCK IS FELT WHEN UPSHIFTING AND DOWNSHIFTING
A6E568001030W22
Diagnostic procedure
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NO.19 EXCESSIVE SHIFT SHOCK ON TORQUE CONVERTER CLUTCH (TCC)
A6E568001030W23
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18 Excessive shift shock is felt when upshifting and downshifting
DESCRIPTION
•
Excessive shift shock felt when depressing accelerator pedal to accelerate at upshifting. During
cruising, excessive shift shock is felt when depressing accelerator pedal at downshifting.
POSSIBLE
CAUSE
•
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
2. Signal malfunction
•
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.
STEP INSPECTION ACTION
1 Perform the stall test. (See K–7 Stall Test .) Is
stall speed okay?
Yes Go to next step.
No Repair or replace any defective parts.
2 Check the value at the following PIDs using the
WDS or equivalent. (See
F–45 PCM
INSPECTION .)
•
TP V
Is PID value okay?
Yes Go to next step.
No Repair or replace any defective parts.
3 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.
4 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.
19 Excessive shift shock on torque converter clutch (TCC)
DESCRIPTION
•
Strong shock is felt when TCC engaged.
POSSIBLE
CAUSE
•
The troubleshooting flow is the same as No.16 “Judder upon TCC operation”.