light MAZDA 6 2002 Suplement Owners Manual

K2–178
ON-BOARD DIAGNOSTIC
DTC P1710A6E577018901229
DTC P1710 GND return circuit malfunction
DETECTION
CONDITION•TCM detects open circuit in GND return signal line from solenoid valve.
Diagnostic support note:
•This is a diagnostic support DTC (monitored one per key cycle).
•MIL does not illuminate.
•PENDING CODE is not available.
•FREEZE FRAME DATA is not available.
•AT warning light does not indication.
•DTC is stored in TCM memory.
POSSIBLE
CAUSE•Open circuit between duty type solenoid valves terminal and TCM terminal 2P
•Damaged connector between solenoid valve and TCM
•TCM malfunction
A J 2PB TCM
CPU
CPUAT X
TCM
HARNESS SIDE CONNECTOR TERMINAL COMPONENT
NO.1(12-PIN)
HARNESS SIDE CONNECTOR
COUPLER COMPONENT
(10-PIN)
PART SIDE CONNECTORSOLENOID VALVE
SOLENOID VALVE
HARNESS SIDE CONNECTOR

K2–182
TROUBLESHOOTING
FOREWORDA6E578001030201•Refer to Section GI and thoroughly read and understand the basic flow of troubleshooting in order to properly
perform the procedure.
End Of Sie
AUTOMATIC TRANSAXLE BASIC INSPECTIONA6E578001030202
End Of Sie
TROUBLESHOOTING
STEP INSPECTION ACTION
1•Turn ignition switch to ON.
•Does gear position indicator light (illuminate/
go out) corresponding to selector lever
position?Yes Go to next step.
No Perform symptom troubleshooting No.27 “Gear position
indicator light does not illuminate in M range” No.28 “Gear
position indicator light illuminates in D range or P, N, R
positions”.
2•Turn ignition switch to ON.
•When selector lever is moved, are selector
lever position and indicator aligned? Also,
when other ranges are selected from N or P
during idling, does vehicle creep within 1 —
2 seconds?Yes Go to next step.
No Inspect selector lever.
(See K2–117 SELECTOR LEVER INSPECTION.)
Repair or replace defected areas.
3•Inspect ATF color and condition.
(See K2–78 Automatic Transaxle Fluid (ATF)
Condition Inspection.)
•Are ATF color and odor normal?Yes Go to next step.
No Repair or replace any defective parts according to
inspection result.
Flush ATX and cooler line as necessary.
4•Perform line pressure test.
(See K2–72 Line Pressure Test.)
•Is line pressure okay?Yes Go to next step.
No Adjust accelerator cable as necessary.
Repair or replace any defective parts according to
inspection result.
5•Perform stall test.
(SeeK2–74 Stall Speed Test.)
•Is stall speed okay?Yes Go to next step.
No Repair or replace any defective parts according to
inspection result.
6•Inspect value at following PIDs using WDS
or equivalent.
(See K2–90 TCM INSPECTION.)
—TFT
—VPWR
—TRD
—RPM
—TRR
—THOP
—CPP/PNP
—TSS
—VSS
—OSS
—MNL_SW
—DWN_SW
—UP_SW
•Are PID values okay?Yes Perform symptom troubleshooting and follow procedures.
No Repair or replace any defective parts according to
inspection result.

TROUBLESHOOTING
K2–183
K2
AUTOMATIC TRANSAXLE SYMPTOM TROUBLESHOOTINGA6E578001030203Diagnostic Index
•Use the chart below to verify the symptoms of the trouble in order to diagnose the appropriate area.
No. TROUBLESHOOTING ITEM DESCRIPTION PAGE
1•Vehicle does not move in D range,
or in R position•Vehicle does not move when accelerator
pedal depressed.(See K2–188 NO.1 VEHICLE
DOES NOT MOVE IN D
RANGE, OR IN R POSITION.)
2•Vehicle moves in N position•Vehicle creeps in N position.
•Vehicle creeps if brake pedal not
depressed in N position.(See K2–188 NO.2 VEHICLE
MOVES IN N POSITION.)
3•Vehicle moves in P position, or
parking gear does not disengage
when P is disengaged•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.(See K2–189 NO.3 VEHICLE
MOVES IN P POSITION, OR
PARKING GEAR DOES NOT
DISENGAGE WHEN P IS
DISENGAGED.)
4•Excessive creep•Vehicle accelerates in D range, and R
position without depressing accelerator
pedal.(See K2–189 NO.4
EXCESSIVE CREEP.)
5•No creep at all•Vehicle does not move in D range, or R
position when idling on flat paved road.(See K2–189 NO.5 NO CREEP
AT ALL.)
6•Low maximum speed and poor
acceleration•Vehicle acceleration poor at start.
•Delayed acceleration when accelerator
pedal depressed while driving.(See K2–190 NO.6 LOW
MAXIMUM SPEED AND
POOR ACCELERATION.)
7•No shifting•Single shift range only.
•Sometimes it shifts correctly.(See K2–191 NO.7 NO
SHIFTING.)
8•Does not shift to fifth gear (5GR)•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}.(See K2–192 NO.8 DOES NOT
SHIFT TO FIFTH GEAR
(5GR).)
9•Abnormal shifting•Shifts incorrectly (incorrect shift pattern). (See K2–193 NO.9
ABNORMAL SHIFTING.)
10•Frequent shifting•Downshifting occurs immediately even
when accelerator pedal depressed
slightly in D range.(See K2–193 NO.10
FREQUENT SHIFTING.)
11•Shift point is high or low•Shift point considerably different from
automatic shift diagram.
•Shift delays when accelerating.
•Shift occurs quickly when accelerating
and engine speed does not increase.(See K2–194 NO.11 SHIFT
POINT IS HIGH OR LOW.)
12•Torque converter clutch (TCC)
non-operation•TCC does not operate when vehicle
reaches TCC operation range.(See K2–194 NO.12 TORQUE
CONVERTER CLUTCH (TCC)
NON-OPERATION.)
13•No kickdown•Does not downshift when accelerator
pedal fully depressed within kickdown
range.(See K2–195 NO.13 NO
KICKDOWN.)
14•Engine flares up or slips when
upshifting or downshifting•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.(See K2–195 NO.14 ENGINE
FLARES UP OR SLIPS WHEN
UPSHIFTING OR
DOWNSHIFTING.)
15•Engine flares up or slips when
accelerating vehicle•Engine flares up when accelerator pedal
depressed for upshifting.
•Engine flares up suddenly when
accelerator pedal depressed for
downshifting.(See K2–196 NO.15 ENGINE
FLARES UP OR SLIPS WHEN
ACCELERATING VEHICLE.)
16•Judder upon torque converter
clutch (TCC) operation•Vehicle jolts when TCC engaged. (See K2–196 NO.16 JUDDER
UPON TORQUE
CONVERTER CLUTCH (TCC)
OPERATION.)

K2–184
TROUBLESHOOTING
17•Excessive shift shock from N to D
or N to R position/range•Strong shock felt when shifting from N to
D or N to R position/range at idle.(See K2–196 NO.17
EXCESSIVE SHIFT SHOCK
FROM N TO D OR N TO R
POSITION/RANGE.)
18•Excessive shift shock is given
when upshifting and downshifting•Excessive shift shock felt when
depressing accelerator pedal to
accelerate at upshifting.
•During cruising, excessive shift shock
felt when depressing accelerator pedal
at downshifting.(See K2–197 NO.18
EXCESSIVE SHIFT SHOCK IS
GIVEN WHEN UPSHIFTING
AND DOWNSHIFTING.)
19•Excessive shift shock on torque
converter clutch (TCC)•Strong shock felt when TCC engaged. (See K2–197 NO.19
EXCESSIVE SHIFT SHOCK
ON TORQUE CONVERTER
CLUTCH (TCC).)
20•Noise occurs at idle when vehicle
is stopped in all positions/ranges•Transaxle noisy in all positions and
ranges when vehicle idling.(See K2–198 NO.20 NOISE
OCCURS AT IDLE WHEN
VEHICLE IS STOPPED IN ALL
POSITIONS/RANGES.)
21•Noise occurs at idle when vehicle
is stopped in D range, or in R
position•Transaxle noisy in driving ranges when
vehicle idling.(See K2–198 NO.21 NOISE
OCCURS AT IDLE WHEN
VEHICLE IS STOPPED IN D
RANGE, OR IN R POSITION.)
22•No engine braking in 1GR position
of M range•Engine speed drops to idle but vehicle
coasts when accelerator pedal released
during cruising at medium to high
speeds.
•Engine speed drops to idle but vehicle
coasts when accelerator pedal released
when in M range (1GR) at low vehicle
speed.(See K2–198 NO.22 NO
ENGINE BRAKING IN 1GR
POSITION OF M RANGE.)
23•Transaxle overheats•Burnt smell emitted from transaxle.
•Smoke emitted from transaxle.(See K2–199 NO.23
TRANSAXLE OVERHEATS.)
24•Engine stalls when shifted to D
range, or in R position•Engine stalls when shifting from N or P
position to D range or R position at idle.(See K2–199 NO.24 ENGINE
STALLS WHEN SHIFTED TO
D RANGE, OR IN R
POSITION.)
25•Engine stalls when driving at slow
speeds or stopping•Engine stalls when brake pedal
depressed while driving at low speed or
stopping.(See K2–200 NO.25 ENGINE
STALLS WHEN DRIVING AT
SLOW SPEED OR
STOPPING.)
26•Starter does not work•Starter does not work even when P or N
position selected.(See K2–200 NO.26
STARTER DOES NOT
WORK.)
27•Gear position indicator light does
not illuminate in M range•Gear position indicator light in
instrument cluster does not illuminate in
M range and ignition switch at on.(See K2–200 NO.27 GEAR
POSITION INDICATOR LIGHT
DOES NOT ILLUMINATE IN M
RANGE.)
28•Gear position indicator light
illuminates in D range or P, N, R
positions•Gear position indicator light in
instrument cluster illuminates in D range
or P, N, R positions and ignition switch at
on.(See K2–201 NO.28 GEAR
POSITION INDICATOR LIGHT
ILLUMINATES IN D RANGE
OR IN P, N, R POSITIONS.)
29•Does not shift up in M range•Gear position indicator light in
instrument cluster illuminates but vehicle
does not upshift when selector lever is
pushed to “+” side.(See K2–201 NO.29 DOES
NOT SHIFT UP IN M RANGE.)
30•Does not shift down in M range•Gear position indicator light in
instrument cluster illuminates but vehicle
does not downshift when selector lever
is pushed to “-” side.(See K2–201 NO.30 DOES
NOT SHIFT DOWN IN M
RANGE.) No. TROUBLESHOOTING ITEM DESCRIPTION PAGE

TROUBLESHOOTING
K2–185
K2
Quick Diagnosis Chart
Vehicle dose not move in D range, or in R position X X
X
X
X
X
X
X
X
X
XX X
XX
XX
XX
XX
X X X
X
XX X
XX
X XXXXX
XX X
XX
XX X X
X
X
X XX
X
XX
X
X
XX
X
XXX
X
XXX
X
X X XX
X
XXXX XX
X
XX
X
X X
XX XX
X
X
X 1
Excessive creep 4
No creep at all 5
Low maximum speed and poor acceleration 6
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) non-operation 12
No kickdown 13
Engine flares up or slips when upshifting or downshifting 14
Engine flares up or slip when accelerating vehicle 15
Judder upon torque converter clutch (TCC) operation 16
Excessive shift shock from N to D or N to R position/range 17
Excessive shift shock on torque converter clutch (TCC) 19
No engine braking in 1GR position of M range 22
Transaxle overheats 23
Engine stalls when shifted to D range, or in R position 24
Engine stalls when driving at slow speeds or stopping 25
Starter does not work 26Excessive shift shock is given when upshifting and
downshifting 18
Noise occurs at idle when vehicle is stopped in all
positions/ranges 20
Noise occurs at idle when vehicle is stopped in D
range, or in R position 21
Gear position indicator light illuminates in D range or P, N,
R positions 28Gear position indicator light does not illuminate in M range
Electrical system components
ATX outer parts 27
Does not shift up in M range
29
Does not shift down in M range
Symptom item
Cause of trouble
Selector lever is misadjisted
Not within line pressure specification
Idle speed is misadjusted
IG timing is misadjusted
TR switch is misadjusted
Open/short
Abnormal signal is inputed
Abnormal signal is inputed Signal is not inputed
Signal is not inputed
Abnormal signal is inputed Signal is not inputed
Abnormal signal is inputed Signal is not inputed
Abnormal signal is inputed Signal is not inputed
Abnormal signal is inputed Signal is not inputed
Abnormal signal is inputed
Abnormal signal is inputed Signal is not inputedCAN signal
CAN signal Engine speed signal
Vehicle speedometer sensor
Input/turbine speed sensor
Intermediate sensor
D range switch
M range switch
Up switch
Down switch
Throttle opening
30Vehicle moves in N position 2
Vehicle moves in P position, or parking gear does not
disengage when P is disengaged 3
X X X
X X X
X
X
A6E5780W001

K2–186
TROUBLESHOOTING
CAN signal
Vehicle dose not move in D range, or in R position
X
XXX X
X
X X
X
XX
X
X
X
X
X
XX
XX
XX
XXX
XX
XX
X
XXX X
XX X
XX X
XX X
XXX
XX
X
XX
X XX XX
X
XX
XX
X XX
X XXXX
XXXX
XXXXX XX XXX
X
X
XX
X
X
X
X
X
X
X
X
X
X X
X
X
X X
XXX
XX
XX X X
X 1
Excessive creep 4
No creep at all 5
Low maximum speed and poor acceleration 6
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) non-operation 12
No kickdown 13
Engine flares up or slips when upshifting or downshifting 14
Engine flares up or slip when accelerating vehicle 15
Judder upon torque converter clutch (TCC) operation 16
Excessive shift shock from N to D or N to R position/range 17
Excessive shift shock on torque converter clutch (TCC) 19
No engine braking in 1GR position of M range 22
Transaxle overheats 23
Engine stalls when shifted to D range, or in R position 24
Engine stalls when driving at slow speeds or stopping 25
Starter does not work 26Excessive shift shock is given when upshifting and
downshifting 18
Noise occurs at idle when vehicle is stopped in all
positions/ranges 20
Noise occurs at idle when vehicle is stopped in D
range, or in R position 21
Gear position indicator light illuminates in D range or P, N,
R positions 28Gear position indicator light does not illuminate in M range
Electrical system components
ATX inner parts
ATX outer parts
Hydraulic system
components
Control valve body 27
Does not shift up in M range
29
Does not shift down in M rangeSymptom item
Cause of trouble
Open/short
Malfunction signal is inputed Signal is inputed
Open/short
Open/short Open/short
Open/short
Open/short
Open/short
Open/short
Open/short Open/short
Open/short
Open/short Open/short
Control valve spool is not operating properly ATF amount
2-4 brake accumulator is not operating properly Low clutch solenoid accumulator is not operating properly
Direct clutch accumulator is not operating properly High clutch accumulator is not operating properly2-4 brake solenoid valve Pressure control solenoid
TCC solenoid valve
High clutch solenoid valve TFT sensor N-D select
Transaxle range switch
Power supply, GND
Shift solenoid A
Shift solenoid B
Shift solenoid C
Neutral shift solenoid valve
Reducation timing solenoid
GND return line
30Vehicle moves in N position 2
Vehicle moves in P position, or parking gear does not
disengage when P is disengaged 3
A6E5780W002

TROUBLESHOOTING
K2–187
K2
End Of Sie
Vehicle dose not move in D range, or in R position
X
X
X
XXX X
XX X
XX X
XX X XX
X
X
X X XX
XX
X XXXXXXXXX
XXX
X
X
X X
XX XXX
X
X
XX X
X
X
X X
X
X
X X
XX
X XXX X XXX
XX X 1
Excessive creep 4
No creep at all 5
Low maximum speed and poor acceleration 6
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) non-operation 12
No kickdown 13
Engine flares up or slips when upshifting or downshifting 14
Engine flares up or slip when accelerating vehicle 15
Judder upon torque converter clutch (TCC) operation 16
Excessive shift shock from N to D or N to R position/range 17
Excessive shift shock on torque converter clutch (TCC) 19
No engine braking in 1GR position of M range 22
Transaxle overheats 23
Engine stalls when shifted to D range, or in R position 24
Engine stalls when driving at slow speeds or stopping 25
Starter does not work 26Excessive shift shock is given when upshifting and
downshifting 18
Noise occurs at idle when vehicle is stopped in all
positions/ranges 20
Noise occurs at idle when vehicle is stopped in D
range, or in R position 21
Gear position indicator light illuminates in D range or P, N,
R positions 28Gear position indicator light does not illuminate in M range
Hydraulic system
components
Control valve bodyPowertrain 27
Does not shift up in M range
29
Does not shift down in M range
Symptom item
Cause of trouble
Reduction accumulator is not operating properly
Clogging
Clogging
Clogging
Clogging
Clogging
Clogging
Clogging Clogging
Clogging
Slipping (clutch, brake) Oil cooler is not operating properly
Torque converter is not operating properly Burned (clutch, brake)
TCC piston is not operating properly TCC piston is cracking or peeling2-4 brake solenoid valve hydraulic circuit Pressure control solenoid hydraulic circuit
TCC solenoid valve hydraulic circuit
High clutch solenoid valve hydraulic circuit
Shift solenoid A hydraulic circuit
Shift solenoid B hydraulic circuit
Shift solenoid C hydraulic circuit
Neutral shift solenoid valve
Reducation timing solenoid valve
30Vehicle moves in N position 2
Vehicle moves in P position, or parking gear does not
disengage when P is disengaged 3
A6E5780W003

TROUBLESHOOTING
K2–189
K2
Diagnostic procedure
End Of SieNO.3 VEHICLE MOVES IN P POSITION, OR PARKING GEAR DOES NOT DISENGAGE WHEN P IS
DISENGAGED
A6E578001030206
End Of SieNO.4 EXCESSIVE CREEPA6E578001030207
End Of SieNO.5 NO CREEP AT ALLA6E578001030208
STEP INSPECTION ACTION
1•Does vehicle creep when selector lever
moved slightly in N position?Yes•Overhaul control valve body and repair or replace any
defective parts.
(See ATX Workshop Manual.)
—If problem remains, replace or overhaul transaxle and
repair or replace any defective parts.
(See K2–99 AUTOMATIC TRANSAXLE AND
TRANSFER REMOVAL/INSTALLATION.)
(See ATX Workshop Manual.)
No Inspect and adjust selector lever.
(See K2–117 SELECTOR LEVER INSPECTION.)
(See K2–118 SELECTOR CABLE ADJUSTMENT.)
2•Verify test results.
—If okay, return to diagnostic index to service any additional symptoms.
—If malfunction remains, inspect related Service Informations and perform repair or diagnosis.
—If vehicle repaired, troubleshooting completed.
—If vehicle not repaired or additional diagnostic information not available, replace TCM.
3 Vehicle moves in P position, or parking gear does not disengage when P is disengaged
DESCRIPTION•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.
POSSIBLE
CAUSE•Malfunction of parking mechanism (May have effect on noise or shock from transaxle)
•Improper adjustment of selector lever
•If vehicle moves in N position, perform symptom troubleshooting No.2 “Vehicle moves in N position”
Note
•Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.
4 Excessive creep
DESCRIPTION•Vehicle accelerates in D range, and R position without depressing accelerator pedal.
POSSIBLE
CAUSE•Engine idle speed high (transaxle system is not cause of problem)
•Go to symptom troubleshooting No.9 “Fast idle/runs on”
(See Section F.)
Note
•Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.
5 No creep at all
DESCRIPTION•Vehicle does not move in D range, or R position when idling on flat paved road.
POSSIBLE
CAUSE•Either engine output low or there is clutch circuit slippage.
—Clutch burned
•Line pressure low
•Malfunction of shift solenoid A, B, or C
•Malfunction of body ground
•Malfunction of control valve body
—Transaxle fixed in 4GR (Operation of fail-safe function)
•Short or open circuit in wiring
•Poor connection of connector
•Electronic parts of output and input system malfunctioning
—Engine torque is not start
•Malfunction of torque converter
Note
•Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.

K2–190
TROUBLESHOOTING
Diagnostic procedure
End Of SieNO.6 LOW MAXIMUM SPEED AND POOR ACCELERATIONA6E578001030209
Diagnostic procedure
STEP INSPECTION ACTION
1•Does vehicle creep in P and/or N position? Yes Inspect or adjust the selector lever.
(See K2–117 SELECTOR LEVER INSPECTION.)
(See K2–118 SELECTOR CABLE ADJUSTMENT.)
No Go to next step.
2•Stop engine.
•Inspect pressure control solenoid circuit.
•Is it okay?Yes Go to next step.
No•Inspect for pressure control solenoid mechanical stuck.
(See K2–88 SOLENOID VALVE INSPECTION.)
—If pressure control solenoid okay, inspect for open or
short circuit between TCM connector terminal 2Y and
pressure control solenoid connector terminal D.
3•Remove torque converter.
•Inspect torque converter.
(See ATX Workshop Manual.)
•Is torque converter okay?Yes•Overhaul control valve body and repair or replace any
defective parts.
(See ATX Workshop Manual.)
—If problem remains, replace or overhaul transaxle and
repair or replace any defective parts.
(See K2–99 AUTOMATIC TRANSAXLE AND
TRANSFER REMOVAL/INSTALLATION.)
(See ATX Workshop Manual.)
No Replace torque converter.
4•Verify test results.
—If okay, return to diagnostic index to service any additional symptoms.
—If malfunction remains, inspect related Service Informations and perform repair or diagnosis.
—If vehicle repaired, troubleshooting completed.
—If vehicle not repaired or additional diagnostic information not available, replace TCM.
6 Low maximum speed and poor acceleration
DESCRIPTION•Vehicle acceleration poor at start.
•Delayed acceleration when accelerator pedal depressed while driving.
POSSIBLE
CAUSE•If clutch is stuck or does not stay in 4GR, malfunction is in engine circuit.
—Clutch slipped, burned
•Line pressure low
•Incorrect throttle position signal
•Malfunction of VSS
•Malfunction of input/turbine speed sensor
•Malfunction of sensor ground
•Malfunction of shift solenoids A, B, or C
•Malfunction of body ground
•Malfunction of control valve body
—Transaxle fixed in 4GR (Operation of fail-safe function)
•Short or open circuit in wiring
•Poor connection of connector
•Electronic parts of output and input system malfunction are malfunctioning
—Insufficient starting torque (Suspected when in-gear condition, shift control and engine circuit are
normal)
•Malfunction of torque converter (Poor operation, sticking)
—Engagement of TCC operation range (Operation of fail-safe function)
•Malfunction of TFT sensor (Short or open circuit)
Note
•Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.
STEP INSPECTION ACTION
1•With ignition switch at ON, does gear
position indicator light indication correspond
to selector lever position?Yes Go to next step.
No Go to symptom troubleshooting No.27 “Gear position
indicator light does not illuminate in M range”, or No.28
“Gear position indicator light illuminates in D range or P, N,
R position”.
2•Go to symptom troubleshooting No.12 “Lack/
loss of power-acceleration/cruise”.
(See Section F.)
•Does engine control system okay?Yes Go to next step.
No Repair or replace any defective parts according to
inspection results.

K2–192
TROUBLESHOOTING
NO.8 DOES NOT SHIFT TO FIFTH GEAR (5GR)A6E578001030211
Diagnostic procedure
8 Does not shift to fifth gear (5GR)
DESCRIPTION•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}.
POSSIBLE
CAUSE•Basically, TCC does not operate when fail-safe is operating. Verify DTC at first. If TCC operates when
driving at high speeds only, malfunction (improper adjustment) is in the D range switch circuit or TR
switch circuit.
Note
•If the TCC or piston is stuck, inspect them. In addition, inspect the oil cooler for foreign particles
which may have mixed in with the ATF.
—TCC piston slipped, burned
•Line pressure low
•Incorrect throttle position signal
•Malfunction of ECT sensor
•Malfunction of VSS
•Malfunction of input/turbine speed sensor
•Malfunction of sensor ground
—Malfunction of TFT sensor
•Short or open circuit in wiring
•Poor connection of connector
•Malfunction of sensor
—Malfunction of TR switch
•Selector lever adjustment incorrect
•TR switch adjustment incorrect
—Malfunction of TCC solenoid valve
•Short or open circuit in wiring
•Poor connection of connector
•Solenoid valve stuck
—Malfunction of M range switch
—Malfunction of torque converter
—Malfunction of control valve body
Note
•Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.
STEP INSPECTION ACTION
1•Turn ignition switch to ON.
•Does gear position indicator light indication
correspond to selector lever position?Yes Go to next step.
No Go to symptom troubleshooting No.27 “Gear position
indicator light does not illuminate in M range” or No.28
“Gear position indicator light illuminates in D range or P, N,
R positions”.
2•Drive vehicle in D range and inspect
following:
—1–2 shift up and down
—2–3 shift up and down
—3–4 shift up and down
—4–5 shift up and down
•Are all shift-up and shift-down possible?Yes Go to next step.
NoNo shift at all:
•Go to symptom troubleshooting No.7 “No shifting”.
Abnormal shift:
•Go to symptom troubleshooting No.9 “Abnormal
shifting”.
3•Stop engine.
•Inspect shift solenoid A, B, or C circuit.
•Are they okay?Yes Go to next step.
No•Inspect for shift solenoid mechanical stuck.
(See K2–88 SOLENOID VALVE INSPECTION.)
4•Remove torque converter.
•Inspect torque converter.
(See ATX Workshop.)
•Is torque converter okay?Yes•Overhaul control valve body and repair or replace any
defective parts.
(See ATX Workshop Manual.)
—If problem remains, replace or overhaul transaxle and
repair or replace any defective parts.
(See K2–99 AUTOMATIC TRANSAXLE AND
TRANSFER REMOVAL/INSTALLATION.)
(See ATX Workshop Manual.)
No Replace torque converter.