TC21 - Check Shift Solenoid Circuit For Short to Power

- Key "OFF".

- Transmission 12-pin connector disconnected.

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary. Leave Powertrain Control Module (PCM) disconnected.

- Key "ON", engine "OFF".

Voltage Teste Points:

- Measure voltage between suspect shift solenoid circuit at transmission vehicle harness connector and chassis ground.

- Is voltage less than 0.5 volt?

Yes -- Key "OFF". Go to TC22. TC22 - Check Shift Solenoid Circuit For Short to Ground

No -- Service short to power. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)