Diagnostic Test

CHECK IF THE DTC IS CURRENT
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.
1. Turn the ignition off to the lock position.
2. With the scan tool, erase Transmission DTC's.
3. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle.
4. With the scan tool, read Transmission DTC's.
  Did the DTC P0758 reset?
  
  Yes
  - Go To 2.
  No
  - Go To 6.
CHECK THE (T74) 2-3 SOLENOID CONTROL CIRCUIT FOR AN OPEN

Fig 1: Checking 2-3 Solenoid Control Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off to the lock position.
2. Disconnect the TCM C2 harness connector.
3. Disconnect the Transmission Electrohydraulic Control Unit Assembly harness connector.
4. Measure the resistance of the (T74) 2-3 Solenoid Control circuit between the TCM C2 harness connector and the Transmission Electrohydraulic Control Unit Assembly harness connector.
  Is the resistance above 5.0 ohms?
  
  Yes
  - Repair the (T74) 2-3 Solenoid Control circuit for an open.
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Go To 3.
CHECK THE (T74) 2-3 SOLENOID CONTROL CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking 2-3 Solenoid Control Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between ground and the (T74) 2-3 Solenoid Control circuit.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (T74) 2-3 Solenoid Control circuit for a short to ground.
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Go To 4.
CHECK THE (T74) 2-3 SOLENOID CONTROL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT

Fig 3: Checking 2-3 Solenoid Control Circuit For A Short To Another Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (T74) 2-3 Solenoid Control circuit and every other circuit in the Transmission Electrohydraulic Control Unit Assembly harness connector.
  Is the resistance below 5.0 ohms between the (T74) 2-3 Solenoid Control circuit and any other circuit(s) in the Transmission Electrohydraulic Control Unit Assembly harness connector?
  
  Yes
  - Repair the (T74) 2-3 Solenoid Control circuit for a short to another circuit(s).
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Go To 5.
CHECK THE 2-3 SOLENOID

Fig 4: Checking 2-3 Solenoid Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Reconnect the Transmission Electrohydraulic Control Unit Assembly harness connector.
2. Measure the resistance of the 2-3 Solenoid between the (T74) 2-3 Solenoid Control circuit and the (T78) Solenoid Voltage Supply circuit in the TCM C2 harness connector.
  Is the resistance between 2.5 and 6.5 ohms?
  
  Yes
  - Using the schematics as a guide, check the Transmission Control Module (TCM) connectors and terminals 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 in accordance with the Service Information.
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Replace the 2-3 Solenoid in accordance with the Service Information.
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle the wiring and connectors while checking for any possible open or shorted circuits.
4. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Test Complete.