Diagnostic Test

WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR RELATED DTCS
Ignition on, engine off.

Using the scan tool, check DTCs.

Are there any Speed Sensor and/or TCC DTCs present?

Yes
1. Refer to the appropriate TRANSMISSION DTC and perform the appropriate symptom.
No
1. Go to 2.
(T75) TCC SOLENOID CONTROL CIRCUIT OPEN

Fig 1: Checking TCC Solenoid Control Circuit For Short To Ground
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position.

Disconnect the TCM C2 harness connector.

Disconnect the Transmission Electrohydraulic Control Unit Assembly harness connector.

Measure the resistance of the (T75) TCC Solenoid Control circuit between the TCM and the Transmission Electrohydraulic Control Unit Assembly harness connector.

Is the resistance above 5.0 ohms?

Yes
1. Repair the (T75) TCC Solenoid Control circuit for an open.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. Go to 3.
(T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND

Fig 2: Checking TCC Solenoid Control Circuit For Short To Ground
Courtesy of CHRYSLER LLC

Measure the resistance between ground and the (T75) TCC Solenoid Control circuit.

Is the resistance below 5.0 ohms?

Yes
1. Repair the (T75) TCC Solenoid Control circuit for a short to ground.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. Go to 4.
(T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO ANOTHER CIRCUIT

Fig 3: Checking TCC Solenoid Control Circuit For Short To Another Circuit
Courtesy of CHRYSLER LLC

Measure the resistance between the (T75) TCC Solenoid Control circuit and all other circuits in the Transmission Electrohydraulic Control Unit Assembly harness connector.

Is the resistance below 5.0 ohms between the (T75) TCC Solenoid Control circuit and all other circuits in the Transmission Electrohydraulic Control Unit Assembly harness connector?

Yes
1. Repair the (T75) TCC Solenoid Control circuit for a short to another circuit(s).
No
1. Go to 5.
TRANSMISSION CONTROL MODULE
NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Record the Environmental Data.

Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM per the Service Information.

Road test the vehicle.

Does the DTC reset?

Yes
1. Repair internal transmission. Pay particular attention to the components related to the TCC such as the Lockup Control valve, TCC solenoid, Valve Body, missing seal ring on the input shaft, or the Torque Converter.
No
1. Test complete