Diagnostic procedure
STEP
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INSPECTION
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ACTION
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME PID DATA been recorded?
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Yes
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Go to next step.
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No
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Record FREEZE FRAME PID DATA on repair order, then go to next step.
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2
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VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Check for related Service Bulletins availability.
• Is any related repair information available?
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Yes
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Perform repair or diagnosis according to available repair information.
• If vehicle is not repaired, go to next step.
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No
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Go to next step.
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3
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CHECK ATF CONDITION
• Turn the ignition switch off.
• Check ATF condition.
• Is it normal?
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Yes
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Go to next step.
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No
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If ATF color is milky or reddish brown, replace ATF, then go to Step 5.
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4
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CHECK ATF LEVEL
• Start engine.
• Warm up ATX.
• Is ATF level within specification?
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Yes
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Go to next step.
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No
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Adjust ATF level, then go to Step 7.
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5
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INSPECT LINE PRESSURE
• Start engine.
• Measure line pressure.
Specification D, S, L rangeIdle: 330-470 kPa {3.4-4.7 kgf/cm2, 48-68 psi} Stall: 1,030-1,190 kPa {10.5-12.1 kgf/cm2, 150-172 psi} R positionIdle: 490-710 kPa {5.0-7.2 kgf/cm2, 71-102 psi} Stall: 1,700-2,050 kPa {17.4-20.9 kgf/cm2, 247-297 psi}
• Is line pressure within specification?
(See Line Pressure Test.)
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Yes
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Go to next step.
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No
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• All ranges: Replace oil pump or control valve body, then go to Step 7.
• Any ranges: Replace ATX, then go to Step 7.
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-99).)
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6
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CHECK OPERATION OF EACH VALVE AND EACH SPRING
• Turn the ignition switch off.
• Remove control valve body.
• Disassemble control valve body.
• Is each valve operation normal and is return spring normal?
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-99).)
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Yes
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Replace ATX, then go to next step.
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-99).)
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No
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Repair or replace shift valve and return spring, then go to next step.
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-99).)
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7
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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.
• Is pending code present?
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Yes
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Replace PCM, then go to next step.
(See PCM REMOVAL/INSTALLATION.)
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No
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Go to next step.
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8
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VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Are any DTCs present?
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Yes
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Go to applicable DTC inspection.
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No
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Troubleshooting completed.
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