Mazda 626 Station Wagon, Workshop Manual, Page: 306 / 577

ON-BOARD DIAGNOSTIC
DTC P0752
DTC P0752 Shift solenoid A stuck ON
DETECTION
CONDITION
Driving vehicle when all conditions below satisfied in 1GR and 2GR.
— ATF temperature 20 ° C {68 ° F} or above.
— Engine speed 450 rpm or above.
— Either of P0705 or P0706 output, or D range is selected.
— Brake pedal depressed.
— Throttle opening angle closed throttle position.
— Vehicle speed
0 km/h {0 mph}.
— Input/turbine speed sensor signal 187.5 rpm or above.
— DTC P0734 not output.
— Any of DTC P0500, P0705, P0706, P0710, P0715, P0751, P0752, P0753, P0756, P0757, P0758,
P0761, P0762, P0763, P0766, P0767, P0768, P0771, P0772, or P0773 not output.
POSSIBLE
CAUSE
ATF level low
Deteriorated ATF
Shift solenoid A stuck
Control valve stuck
PCM malfunction
Diagnostic procedure
STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related Service Information available?
Yes Perform repair or diagnosis according to available repair
information.
• If vehicle is not repaired, go to next step.
No Go to next step.
2 CHECK ATF CONDITION
• Turn ignition key to OFF.
• Check ATF condition.
— Clear red: Normal
— Milky: Water mixed in fluid
— Reddish brown: Deteriorated ATF
• Is it okay?
(See K2-28 AUTOMATIC TRANSAXLE FLUID
(ATF) INSPECTION, Automatic Transaxle Fluid
(ATF) Condition Inspection.)
Yes Go to next step.
No
If ATF color milky or reddish brown, replace ATF, then go
to Step 4.
(See K2-29 AUTOMATIC TRANSAXLE FLUID (ATF)
REPLACEMENT.)
3 CHECK ATF LEVEL
• Start engine.
• Warm up ATX.
• Is ATF level within specification?
(See K2-28 AUTOMATIC TRANSAXLE FLUID
(ATF) INSPECTION, Automatic Transaxle Fluid
(ATF) Level Inspection.)
Yes Go to next step.
No Adjust ATF level, then go to Step 6.
(See K2-28 AUTOMATIC TRANSAXLE FLUID (ATF)
INSPECTION, Automatic Transaxle Fluid (ATF) Level
Inspection.)
4 INSPECT LINE PRESSURE
• Start engine.
• Measure line pressure.
Specification
Idle:
334— 470 kPa {3.4— 4.8 kgf/cm2,
49—68 psi}
Stall: 1,158—1,323 kPa {11.8— 13.5 kgf/cm2,
168—191 psi}
• Is line pressure within specification?
(See K2-21 MECHANICAL SYSTEM TEST, Line
Pressure Test.)
Yes Go to next step.
No • All ranges: Replace oil pump or control valve body,
then go to Step 6.
(See K2-46 CONTROL VALVE BODY REMOVAL.)
(See K2-46 CONTROL VALVE BODY INSTALLATION.)
(See ATX Workshop Manual FN4A-EL [1623-10-98E].)
• Any ranges: Replace ATX, then go to Step 6.
(See K2-41 AUTOMATIC TRANSAXLE (ATX)
REMOVAL/INSTALLATION.)
K2-99