Mazda 6 2002, Руководство по ремонту

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K–70
ON-BOARD DIAGNOSTIC
DTC P0731
A6E567001030W13
Diagnostic procedure
DTC P0731 Gear 1 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 2.157 , PCM determines that there is
malfunction.
Monitoring condition:
— ATF temperature 20
°
C {68
°
F} or above .
— Driving in 1GR in D range.
— Engine run.
— Turbine speed
within 225—4,988 rpm .
— Throttle opening angle 5.67% or above
— 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 solenoid A stuck
•
Pressure control solenoid stuck
•
Line pressure low
•
One-way clutch slipping
•
Forward clutch slipping
•
Control valve stuck
•
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
•
Perform inspection of operation. (See K–26
SOLENOID VALVE INSPECTION .)
•
Verify the click sound of shift solenoid A when
applying B+ to transaxle connector terminal A.
•
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 .)
5 INSPECT LINE PRESSURE
•
Start engine.
•
Measure line pressures.
Specification
Idle: 330—470 kPa {3.4—4.7 kgf/cm
2
, 49—66
psi}
Stall: 1,160—1,320 kPa {11.9—13.4 kgf/cm
2
,
170—190 psi}
•
Is line pressure within specification?
(See K–6 Line Pressure Test .)
Yes Go to next step.
No All ranges: Replace oil pump, then go to Step 8.
Any ranges: Replace control valve body, then go to Step 8.
(See
K–34 CONTROL VALVE BODY REMOVAL , K–35
CONTROL VALVE BODY INSTALLATION .)