Mazda 6 2002, Workshop Manual

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TROUBLESHOOTING
K–129
K
NO.22 NO ENGINE BRAKING IN HOLD MODE
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Diagnostic procedure
End Of Sie
NO.23 TRANSAXLE OVERHEATS
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Diagnostic procedure
22 No engine braking in hold mode
DESCRIPTION
•
Engine speed drops to idle but vehicle coasts when accelerator pedal is released during cruising at
medium to high speeds.
•
Engine speed drops to idle but vehicle coasts when accelerator pedal is released when in L range at
low vehicle speed.
POSSIBLE
CAUSE
1. Clutch slippage, burned (low and reverse brake)
•
Line pressure low
•
Shift solenoid D malfunction
•
Shift solenoid E malfunction
•
Shift solenoid C malfunction
•
Control valve body malfunction
•
Body GND malfunction
2. Signal malfunction
•
TP sensor malfunction
•
Vehicle speed sensor malfunction
•
Sensor GND malfunction
•
Input/turbine speed sensor malfunction
3. HOLD switch ON not judged by PCM (short, or open circuit, poor operation)
•
HOLD switch signal 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
•
Do following symptoms concurrently occur?
— Engine flares up or slips during
acceleration.
— Engine flares up or slips when shifting.
Yes Go to symptom troubleshooting NO.14 "Engine flares up or
slips when upshifting or downshifting" or No.15 "Engine
flares up or slips when accelerating vehicle".
No Repeat basic inspection and repair or replace any defective
parts according to inspection result.
(See
K–112 BASIC INSPECTION .)
23 Transaxle overheats
DESCRIPTION
•
Burnt smell emitted from transaxle.
•
Smoke emitted from transaxle.
POSSIBLE
CAUSE
•
The malfunction is restricted to hindrance of coolant at the oil cooler. In addition, overheating of the
transaxle may be caused by a malfunction of the transaxle fluid temperature sensor.
1. Burned (TCC)
•
Line pressure low
•
Control valve body malfunction
•
Accelerator cable misadjustment
2. Oil cooler malfunction (Foreign material mixed ATF)
3. Transaxle fluid temperature sensor malfunction
4. Excessive amount of ATF
5. Torque converter 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
•
Inspect for bent, damage, corrosion or kinks
of oil cooler pipes.
•
Are oil cooler pipes okay?
Yes Go to next step.
No Replace any defective parts.
2
•
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.
3
•
Check the value at the following PID using
the WDS or equivalent.
(See
F–45 PCM INSPECTION .)
— TP
•
Is PID value okay?
Yes Go to next step.
No Repair or replace any defective parts.