Mazda 6 2002, Руководство по ремонту

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ON-BOARD DIAGNOSTIC
K–75
K
DTC P0734
A6E567001030W16
Diagnostic procedure
DTC P0734 Gear 4 incorrect (Incorrect Gear Ratio Detected)
DETECTION
CONDITION
•
PCM monitors revolution ratio of forward clutch drum revolution to differential gear case revolution when the
following monitoring conditions are met. If revolution ratio is
below 0.6 or above 1.249 , PCM determines
that there is malfunction.
Monitoring condition:
— ATF temperature 20
°
C {68
°
F} or above .
— Driving in 4 GR in D range.
— Engine run.
— Turbine speed
within 225—4,988 rpm .
— Vehicle speed 50 km/h {31 mph} or above .
— Closed throttle position.
— Differential gear case (output) revolution speed
35 rpm or above .
— Any of the following not generated: DTC P0500, P0706, P0707, P0708, P0712, P0713, P0715, P0751,
P0752, P0753, P0756, P0757, P0758, P0761, P0762, P0763, P0766, P0767, P0768, P0771, P0772,
P0773.
Diagnostic support note:
•
This is a continuous monitor (CCM).
•
MIL does not illuminate.
•
HOLD indicator light flashes if PCM detects the above malfunction condition during first drive cycle.
•
FREEZE FRAME DATA is not available.
•
Pending code is not available.
•
DTC stored in the PCM memory.
POSSIBLE
CAUSE
•
ATF level low
•
Deteriorated ATF
•
Shift solenoids A, B or C stuck
•
Pressure control solenoid stuck
•
Line pressure low
•
2-4 brake band slipping
•
3-4 clutch slipping
•
Forward clutch slipping
•
Control valve stuck (Bypass or 3-4 shift valve)
•
Oil pump
•
PCM malfunction
STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
•
Check for related Service Bulletins availability.
•
Is any related repair information available?
Yes Perform repair or diagnosis according to available repair
information.
No Go to next step.
2 CHECK ATF CONDITION
•
Check ATF condition.
(See
K–12 AUTOMATIC TRANSAXLE FLUID
(ATF) INSPECTION .)
•
Is it okay?
Yes Go to next step.
No Replace ATF, then go to Step 8.
3 CHECK ATF LEVEL
•
Start engine.
•
Warm up ATX.
•
Is ATF level within specification?
(See
K–12 AUTOMATIC TRANSAXLE FLUID
(ATF) INSPECTION .)
Yes Go to next step.
No Adjust ATF level, then go to Step 8.
4 INSPECT SHIFT SOLENOID VALVE A AND D
FOR CLICK SOUND
•
Perform inspection of operation. (See K–26
SOLENOID VALVE INSPECTION .)
•
Verify the click sound of shift solenoids A and D
when applying B+ to each transaxle connector
terminal.
Note
•
Click from solenoid D is barely audible.
Remove solenoids to correctly inspect if
necessary.
•
Was click heard from solenoids?
Yes Go to next step.
No Replace solenoid that you could not hear click sound, then
go to Step 8.
(See
K–28 SOLENOID VALVE REMOVAL/
INSTALLATION .)