Automatic Transaxle Symptom Troubleshooting; Poor Acceleration; Downshifting; Converter Clutch (Tcc) - Mazda Mazda6 Workshop Manual Supplement

AUTOMATIC TRANSAXLE SYMPTOM TROUBLESHOOTING

Diagnostic Index
• Use the chart below to verify the symptoms of the trouble in order to diagnose the appropriate area.
No. TROUBLESHOOTING ITEM
• Vehicle does not move in D range,
1
or in R position
• Vehicle moves in N position
2
• Vehicle moves in P position, or
3
parking gear does not disengage
when P is disengaged
• Excessive creep
4
• No creep at all
5
• Low maximum speed and poor
6
acceleration
• No shifting
7
• Does not shift to fifth gear (5GR)
8
• Abnormal shifting
9
• Frequent shifting
10
• Shift point is high or low
11
• Torque converter clutch (TCC)
12
non-operation
• No kickdown
13
• Engine flares up or slips when
14
upshifting or downshifting
• Engine flares up or slips when
15
accelerating vehicle
• Judder upon torque converter
16
clutch (TCC) operation
TROUBLESHOOTING
DESCRIPTION
• Vehicle does not move when accelerator
pedal depressed.
• Vehicle creeps in N position.
• Vehicle creeps if brake pedal not
depressed in N position.
• Vehicle rolls when on a downward slope
and tires do not lock in P position.
• Tires locked when P disengaged,
vehicle does not move in D range, and R
position when accelerator pedal
depressed, and engine remains in stall
condition.
• Vehicle accelerates in D range, and R
position without depressing accelerator
pedal.
• Vehicle does not move in D range, or R
position when idling on flat paved road.
• Vehicle acceleration poor at start.
• Delayed acceleration when accelerator
pedal depressed while driving.
• Single shift range only.
• Sometimes it shifts correctly.
• Vehicle does not upshift from 4GR to
5GR even though vehicle speed
increased.
• Vehicle does not shift to 5GR even
though accelerator pedal released in D
range at 60 km/h {37 mph}.
• Shifts incorrectly (incorrect shift pattern). (See
• Downshifting occurs immediately even
when accelerator pedal depressed
slightly in D range.
• Shift point considerably different from
automatic shift diagram.
• Shift delays when accelerating.
• Shift occurs quickly when accelerating
and engine speed does not increase.
• TCC does not operate when vehicle
reaches TCC operation range.
• Does not downshift when accelerator
pedal fully depressed within kickdown
range.
• When accelerator pedal depressed for
driveway, engine speed increases but
vehicle speed increase slowly.
• When accelerator pedal depressed while
driving, engine speed increases but
vehicle speed does not increase.
• Engine flares up when accelerator pedal
depressed for upshifting.
• Engine flares up suddenly when
accelerator pedal depressed for

downshifting.

• Vehicle jolts when TCC engaged.
A6E578001030203
PAGE
(See K2–188 NO.1 VEHICLE
DOES NOT MOVE IN D
RANGE, OR IN R POSITION.)
(See K2–188 NO.2 VEHICLE
MOVES IN N POSITION.)
(See K2–189 NO.3 VEHICLE
MOVES IN P POSITION, OR
PARKING GEAR DOES NOT
DISENGAGE WHEN P IS
DISENGAGED.)
(See K2–189 NO.4
EXCESSIVE CREEP.)
(See K2–189 NO.5 NO CREEP
AT ALL.)
(See K2–190 NO.6 LOW
MAXIMUM SPEED AND
POOR ACCELERATION.)
(See K2–191 NO.7 NO
SHIFTING.)
(See K2–192 NO.8 DOES NOT
SHIFT TO FIFTH GEAR
(5GR).)
K2–193 NO.9
ABNORMAL SHIFTING.)
(See K2–193 NO.10
FREQUENT SHIFTING.)
(See K2–194 NO.11 SHIFT
POINT IS HIGH OR LOW.)
(See K2–194 NO.12 TORQUE

CONVERTER CLUTCH (TCC)

NON-OPERATION.)
(See K2–195 NO.13 NO
KICKDOWN.)
(See K2–195 NO.14 ENGINE
FLARES UP OR SLIPS WHEN
UPSHIFTING OR
DOWNSHIFTING.)
(See K2–196 NO.15 ENGINE
FLARES UP OR SLIPS WHEN
ACCELERATING VEHICLE.)
(See K2–196 NO.16 JUDDER
UPON TORQUE
CONVERTER CLUTCH (TCC)
OPERATION.)
K2–183
K2