CODE 52 XX -- OFFGOING C3 PRESSURE SWITCH TEST DURING SHIFT

WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL

CODE 52 XX -- OFFGOING C3 PRESSURE SWITCH TEST DURING SHIFT

5. If C3 is being held on hydraulically (C3 remains pressurized), drain the fluid, remove the control

module, disassemble and clean the control module, checking for damaged valve body gaskets or

stuck and sticky valves.

6. If the problem recurs, use a spare wire, if available, or provide a new wire (St. Clair P/N 200153

may be used for this purpose) for the C3 pressure switch in the external harness.

7. If the problem again recurs, replace the C solenoid.

8. If the condition persists, replace the ECU. If replacing the ECU corrects the problem, reinstall the

original (bad) ECU to confirm that the problem is in the ECU. If the original ECU now works,

inspect the ECU connectors for any corrosion or damage which may cause an intermittent

condition. If the original problem recurs, reinstall the replacement ECU.

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