Mazda 2002 6 Workshop Manual page 517

Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME PID DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins availability.
• Is any related repair information available?
3 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 K–12 Automatic Transaxle Fluid (ATF)
Condition Inspection.)
4 CHECK ATF LEVEL
• Start engine.
• Warm up ATX.
• Is ATF level within specification?
(See K–12 Automatic Transaxle Fluid (ATF) Level
Inspection.)
5 INSPECT LINE PRESSURE
• Start engine.
• Measure line pressure.
Specification
Idle: 330—470 kPa {3.4—4.7 kgf/cm
psi}
Stall: 1,200—1,360 kPa {12.3—13.8 kgf/cm
175—196 psi}
• Is line pressure within specification?
(See K–6 Line Pressure
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
K–35 CONTROL VALVE BODY
(See ATX Workshop Manual FN4A-EL (9999-95-
FN4A-99).)
7 VERIFY TROUBLESHOOTING OF DTC P0772
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
and make sure that gears shift smoothly from
1GR to 4GR.
— ATF temperature: 20 °C {68 °F} or above
— Drive in D range
— Vehicle speed (VSS PID): below 70 km/h
{43 mph} (4th gear only)
• Is pending code present?
8 VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See K–52 AFTER REPAIR
• Are any DTCs present?
End Of Sie
K–106
ON-BOARD DIAGNOSTIC
INSPECTION
2
, 49—66
2
,
Test.)
REMOVAL,
INSTALLATION.)
PROCEDURE.)
Yes Go to next step.
No Record FREEZE FRAME PID DATA on repair order, then
go to next step.
Yes Perform repair or diagnosis according to available repair
information.
• If vehicle is not repaired, go to next step.
No Go to next step.
Yes Go to next step.
No If ATF color milky or reddish brown, replace ATF, then go to
Step 5.
(See K–13 AUTOMATIC TRANSAXLE FLUID (ATF)
REPLACEMENT.)
Yes Go to next step.
No Adjust ATF level, then go to Step 7.
(See K–12 Automatic Transaxle Fluid (ATF) Level
Inspection.)
Yes Go to next step.
• All ranges: Replace oil pump or control valve body, then
No
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).)
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
CONTROL VALVE BODY
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-
99).)
Yes Replace PCM, then go to next step.
(See F–43 PCM REMOVAL/INSTALLATION.)
No Go to next step.
Yes Go to applicable DTC inspection.
No Troubleshooting completed.
ACTION
REMOVAL, K–35
INSTALLATION.)