Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

CHECK IF THE DTC P0888 IS CURRENT
1. With the scan tool, Check the Starts Since Set counter for P0888.
  NOTE:
  This counter only applies to the last DTC set.
  
  Is the Starts Since Set counter equal to 0?
  
  Yes
  - Go To 2.
  No
  - Go To 6.
TRANSMISSION CONTROL RELAY
1. Turn the ignition off to the lock position.
2. Remove the Transmission Control Relay.
3. Install a substitute Relay in place of the Transmission Control Relay.
4. Ignition on, engine not running.
5. With the scan tool, monitor the Switched Battery voltage in the next step.
  NOTE:
  The switched battery voltage should remain steady and around 12-volts
  
  Does the Switched Battery voltage remain a steady voltage (12-volts) and the DTC not reset?
  
  Yes
  - Replace the Transmission Control Relay.
  - Refer to STANDARD PROCEDURE and perform the 62TE VERIFICATION TEST .
  No
  - Go To 3.
(T16) TRANSMISSION CONTROL OUTPUT CIRCUIT OPEN
1. Turn the ignition off to the lock position.
2. Disconnect the PCM C1 harness connector.
3. Connect a fused jumper wire between the (Internal) Fused B(+) circuit and the (T16) Transmission Control Output circuit in the Transmission Control Relay connector.
4. Ignition on, engine not running.
  CAUTION:
  Using a low impedance test light can damage computer circuitry. Make sure to double check the circuit identification before testing.
5. Using a low impedance test light connected to ground, check the (T16) Transmission Control Output circuits in the PCM C1 harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4.
  No
  - Repair the (T16) Transmission Control Output circuits for an open or high resistance. Note: There are multiple Transmission Control Output circuits and usually derive from a common splice. Make sure to inspect the splice for corrosion or water intrusion and repair as necessary.
  - Refer to STANDARD PROCEDURE and perform the 62TE VERIFICATION TEST .
CHECK THE (T15) TRANSMISSION CONTROL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Transmission Control Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off to the lock position.
2. Disconnect the PCM C1 harness connector.
3. Remove the PCM/TCM Relay.
4. Measure the resistance between ground and the (T15) Transmission Control circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T15) Transmission Control circuit for a short to ground.
  - Refer to STANDARD PROCEDURE and perform the 62TE VERIFICATION TEST .
  No
  - Go To 5.
CHECK THE (T15) TRANSMISSION CONTROL CIRCUIT FOR AN OPEN

Fig 2: Checking Transmission Control Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (T15) Transmission Control circuit between the PCM/TCM relay connector in the PDC and the appropriate terminal of the PCM C1 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (T15) Transmission Control circuit for an open.
  - Refer to STANDARD PROCEDURE and perform the 62TE VERIFICATION TEST .
  No
  - Using the schematics as a guide, check the Powertrain Control Module (PCM) 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 PCM in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL . With the scan tool, perform Quick Learn.
  - Refer to STANDARD PROCEDURE and perform the 62TE VERIFICATION TEST .
CHECK THE 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 wires while checking for shorted and open circuits.
4. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set.
  Where there any problems found?
  
  Yes
  - Repair as necessary.
  - Refer to STANDARD PROCEDURE and perform the 62TE VERIFICATION TEST .
  No
  - Test Complete.