K–88
ON-BOARD DIAGNOSTIC
End Of Sie
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 P0756
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
— Engine speed: 450 rpm or above (RPM
PID)
— Throttle opening angle (TP PID): 5.67% or
above
• 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
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