TC10 - Check VPWR to Solenoid

Diagnostic Trouble Code (DTC) 99/624 indicate a failure of EPC circuit.

DTC 625 indicates an opening in the driver circuit.

Possible causes:
- Open or short in harnesses (internal/external).
- Solenoid damaged electrically.

- Key "OFF".

- Disconnect transmission connector.

- Key "ON", engine "OFF".

- Measure the voltage between VPWR, EPC PWR circuit at transmission vehicle harness connector and chassis/battery ground.

- Is voltage greater than 10.5 volts?

Yes -- Go to TC11. TC11 - Check Continuity of Solenoid Signal and VPWR Harness

No -- Service open in harness. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)