Mazda 626 - DTC P0762 Shift Solenoid C Stuck on

ON-BOARD DIAGNOSTIC
IDTC P0762
DTC P0762
Shift solenoid C stuck ON
DETECTION
CONDITION
• All of the following two conditions satisfied while either of DTC P0731 and P0732 output.
— When all conditions below satisfied while driving in 3GR.
• ATF temperature 20 ° C {68 * F} or above.
• Driving in D range.
• Engine speed 450 rpm or above.
• Turbine speed within 225—4,988 rpm.
• Differential gear case (output) revolution speed 35 rpm or above.
• Revolution ratio of forward clutch drum revolution to differential gear case revolution below 0.863
or 1.249 or above.
— When all conditions below satisfied while driving in 4GR.
• ATF temperature 20 * C {68 * F} or above.
• Driving in D range.
• Engine speed 450 rpm or above.
• Turbine speed within 225—4,988 rpm.
• Vehicle speed 50 km/h {31 mph} or above.
• Differential gear case (output) revolution speed 35 rpm or above.
• Throttle opening angle closed throttle position
• Revolution ratio of forward clutch drum revolution to differential gear case revolution below 0.6 or
1.249 or above.
POSSIBLE
CAUSE
• ATF level low
• Deteriorated ATF
• Shift solenoid C and pressure control solenoid 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.)
K2-113