Mazda 6 2002 - Dtc P0758

K90
ON-BOARD DIAGNOSTIC
End Of Sie
DTC P0758
A6E567001030W25
5 INSPECT LINE PRESSURE
• Start engine.
• Measure line pressure.
Specification
Idle: 330470 kPa {3.44.7 kgf/cm
2
, 4966
psi}
Stall: 1,2001,360 kPa {12.313.8 kgf/cm
2
,
175196 psi}
• Is line pressure within specification?
(See K6 Line Pressure Test.)
Yes Go to next step.
No • All ranges: Replace oil pump or control valve body, then
go to Step 7.
• Any ranges: Replace ATX, then go to Step 7.
(See K29 AUTOMATIC TRANSAXLE REMOVAL/
INSTALLATION.)
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-
99).)
6 CHECK OPERATION OF EACH VALVE AND
EACH SPRING
• Turn ignition key to OFF.
• Remove control valve body.
• Disassemble control valve body.
• Is each valve operation okay and is return
spring okay?
(See K34 CONTROL VALVE BODY REMOVAL,
K35 CONTROL VALVE BODY INSTALLATION.)
(See ATX Workshop Manual FN4A-EL (9999-95-
FN4A-99).)
Yes Replace ATX, then go to next step.
(See K29 AUTOMATIC TRANSAXLE REMOVAL/
INSTALLATION.)
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-
99).)
No Repair or replace shift valve and return spring, then go to
next step.
(See K34 CONTROL VALVE BODY REMOVAL, K35
CONTROL VALVE BODY INSTALLATION.)
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-
99).)
7 VERIFY TROUBLESHOOTING OF DTC P0757
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from memory using WDS or
equivalent.
• Start engine.
• Warm up ATX.
• Drive the vehicle under the following conditions
make sure that gears shift smoothly from 1GR
to 4GR.
 ATF temperature: 20 °
°°
°C {68 °
°°
°F} or above
 Drive in D range
 Engine speed: 450 rpm or above (RPM
PID)
 Throttle opening angle (TP PID): 0% (4th
gear only)
 Vehicle speed (VSS PID): 50 km/h {31
mph} (4th gear only)
• Is pending code present?
Yes Replace PCM, then go to next step.
(See F43 PCM REMOVAL/INSTALLATION.)
No Go to next step.
8 VERIFY AFTER REPAIR PROCEDURE
• Perform After Repair Procedure.
(See K52 AFTER REPAIR PROCEDURE.)
• Are any DTCs present?
Yes Go to applicable DTC inspection.
No Troubleshooting completed.
STEP INSPECTION ACTION
DTC P0758 Shift solenoid B malfunction (electrical)
DETECTION
CONDITION
• If PCM detects either of following conditions, PCM determines that shift solenoid B circuit has a
malfunction:
 Shift solenoid B voltage is stuck at B+ after engine start.
 Shift solenoid B voltage is stuck at 0 V after engine start.
Diagnostic support note:
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction conditions during first drive cycle.
• PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• HOLD indicator light flashes.
• DTC is stored in the PCM memory.