TC - Testing Notes

NOTE: You should enter this Pinpoint Test only when you have been directed here from Diagnostic Routines.

DESCRIPTION
Transmissions solenoids are used to shift transmission gear ratios, connect both turbine and impeller in the torque converter, and provide coasting on deceleration. The ground signal is controlled by the PCM and 12 volts VPWR is supplied to the solenoids from the Electronic Engine Controls (EEC) power relay.

REMEMBER
This Pinpoint Test is not intended to diagnose components in the transmission. To prevent the replacement of good components, be aware that the following non-EEC areas may be at fault:

- Engine
- Performance
- Vacuum
- Cooling
- Brakes

- Electrical
- Generator
- Battery integrity
- Brake Switch

- Transmission
- Internal transmission components
- Linkage
- Cooling

This Pinpoint Test is intended to diagnose only the following:

- Harness Circuits: TCC, CCS, EPC, SS3/4-4/3SS1, SS2, SS3, SIG RTN, EPC PWR, and VPWR.

- Powertrain Control Module (PCM).