Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Possible Causes
PRESSURE SWITCH 7 SIGNAL CIRCUIT OPEN
PRESSURE SWITCH 7 SIGNAL CIRCUIT SHORT TO GROUND
PRESSURE SWITCH 7
CONTROL VALVE 3
INTERNAL WIRING
INTERNAL TRANSMISSION
TRANSMISSION CONTROL MODULE

Always perform the AS68RC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to Standard Procedure .

CHECK IF DTC IS CURRENT
1. Using the scan tool, read TCM DTCs.
2. Record the Environmental Data and any DTCs.
3. Clear DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. Read TCM DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2.
  No
  - Go To 8.
CHECK PRESSURE SWITCH 7 STATE
1. Ignition on, engine not running.
2. With the scan tool, view the Pressure Switch 7 state.
  Does the scan tool display the Pressure Switch 7 as α - Oe Closedα - ??
  
  Yes
  - Go To 3.
  No
  - Go To 5.
CHECK PRESSURE SWITCH 7
1. Turn the ignition off to the lock position.
2. Disconnect the Transmission Solenoid Assembly C1 harness connector
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Ignition on, engine not running.
4. With the scan tool, view the Pressure Switch 7 state.
  Does the scan tool display the Pressure Switch 7 as α - Oe Closedα - ??
  
  Yes
  - Go To 4.
  No
  - Inspect the internal wiring harness and connectors for shorts, corrosion, damage, or terminal push out. If no problems found, replace the Pressure Switch 7 in accordance with the Service Information.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
CHECK THE (T806) PRESSURE SWITCH 7 SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Pressure Switch 7 Signal Circuit For A Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the TCM C3 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance of the (T806) Pressure Switch 7 signal circuit to ground.
  Is the resistance below 100k Ohms?
  
  Yes
  - Repair the (T806) Pressure Switch 7 signal circuit for a short to ground.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  No
  - 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 in accordance with the Service Information.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
CHECK PRESSURE SWITCH 7 SIGNAL CIRCUIT
1. Turn the ignition off to the lock position.
2. Disconnect the Transmission Solenoid Assembly C1 harness connector
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Ignition on, engine not running.
4. With the scan tool, monitor the Pressure Switch 7 state in the following step.
5. Using a test light connected to ground, probe the (T806) Pressure Switch 7 signal circuit in the Transmission Solenoid Assembly C1 Harness connector.
  Does the scan tool display the Pressure Switch 7 as α - Oe Closedα - ? when the (T806) Pressure Switch 7 signal circuit is grounded with the test light?
  
  Yes
  - Go To 7.
  No
  - Go To 6.
CHECK THE (T806) PRESSURE SWITCH 7 SIGNAL CIRCUIT FOR AN OPEN

Fig 2: Checking Pressure Switch 7 Signal Circuit For An Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the TCM C3 harness connector.
3. Measure the resistance of the (T806) Pressure Switch 7 signal circuit between the Transmission Solenoid Assembly C1 harness connector and the TCM C3 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for shorts, 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.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Repair the (T806) Pressure Switch 7 signal circuit for an open.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
CHECK INTERNAL TRANSMISSION
1. Turn the ignition off to the lock position.
2. Remove the transmission oil pan.
3. Check the internal transmission harness, pins, terminals, and connectors for shorts, corrosion, damage, or terminal push out.
4. Visually inspect the valve body for debris, damage or leaking hydraulic paths.
5. Visually inspect for sticking or binding Control Valve(s).
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Replace the Pressure Switch 7 in accordance with the Service Information.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
CHECK WIRING AND CONNECTORS
1. The conditions necessary to set the 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 wires while checking for shorted and open circuits.
4. Check for any Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Test Complete.