Diagnostic Test

WARNING: This page is about a different car, the 2019 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read DTCM DTCs and record on the repair order.
2. Record the Environmental Data.
3. With the scan tool, erase 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. With the scan tool, read DTCM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITIONS TEST. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE (T323) PTU MOTOR (+) CIRCUIT FOR A SHORT TO THE (T324) PTU MOTOR (-) CIRCUIT
1. Using a multimeter, measure the resistance between pins 3 and 4 of the DTCM harness connector (wire side).
  Is the resistance lower than 10 ohms.?
  
  Yes
  - Go To 3
  No
  - Go To 7
CHECK THE (T323) PTU MOTOR (+) CIRCUIT FOR A SHORT TO GROUND
1. Using a multimeter, measure the resistance of the (T323) PTU Motor (+) circuit between pin 3 of the DTCM harness connector (wire side) and ground.
  Is the resistance higher than 20 megaohms?
  
  Yes
  - Go To 4
  No
  - Go To 7
CHECK THE (T324) PTU MOTOR (-) CIRCUIT FOR A SHORT TO GROUND
1. Using a multimeter, measure the resistance of the (T324) PTU Motor (-) circuit between pin 4 of the DTCM harness connector (wire side) and ground.
  Is the resistance higher than 20 megaohms?
  
  Yes
  - Go To 5
  No
  - Go To 7
CHECK THE (T323) PTU MOTOR (+) CIRCUIT FOR A SHORT TO BATTERY
1. Using a multimeter, measure the resistance of the (T323) PTU Motor (+) circuit between pin 3 of the DTCM harness connector (wire side) and the (A198) Fused B(+) circuit at pin 73 of the DTCM harness connector (wire side).
2. Using a multimeter, measure the resistance of the (T323) PTU Motor (+) circuit between pin 3 of the DTCM harness connector (wire side) and the (A194) Fused B(+) circuit at pin 5 of the DTCM harness connector (wire side).
  Is the resistance higher than 20 megaohms?
  
  Yes
  - Go To 6
  No
  - Go To 7
CHECK THE (T324) PTU MOTOR (-) CIRCUIT FOR A SHORT TO BATTERY
1. Using a multimeter, measure the resistance of the (T324) PTU Motor (-) circuit between pin 4 of the DTCM harness connector (wire side) and the (A198) Fused B(+) circuit at pin 73 of the DTCM harness connector (wire side).
2. Using a multimeter, measure the resistance of the (T324) PTU Motor (-) circuit between pin 4 of the DTCM harness connector (wire side) and the (A194) Fused B(+) circuit at pin 5 of the DTCM harness connector (wire side).
  Is the resistance higher than 20 megaohms?
  
  Yes
  - Go To 11
  No
  - Go To 7
CHECK THE POWER TRANSFER UNIT (PTU) ACTUATOR MOTOR FOR PROPER OPERATION
1. Disconnect the PTU harness connector.
2. Using a multimeter, measure the resistance between pins 2 and 3 of the PTU Actuator Motor harness connector (motor side).
  Is the resistance lower than 10 ohms.?
  
  Yes
  - Go To 8
  No
  - Replace the Power Transfer Unit (PTU) Actuator Motor in accordance with the service information. Refer to ACTUATOR, SHIFT, REMOVAL AND INSTALLATION .
  - Perform the DTCM VERIFICATION Procedure. Refer to DTCM VERIFICATION TEST .
CHECK THE POWER TRANSFER UNIT (PTU) ACTUATOR MOTOR FOR PROPER OPERATION
1. Using a multimeter, measure the resistance between pin 2 of the PTU harness connector (motor side) and the casing of the PTU Actuator Motor.
  Is the resistance higher than 20 megaohms?
  
  Yes
  - Go To 9
  No
  - Replace the Power Transfer Unit (PTU) Actuator Motor in accordance with the service information. Refer to ACTUATOR, SHIFT, REMOVAL AND INSTALLATION .
  - Perform the DTCM VERIFICATION Procedure. Refer to DTCM VERIFICATION TEST .
CHECK THE POWER TRANSFER UNIT (PTU) ACTUATOR MOTOR FOR PROPER OPERATION
1. Using a multimeter, measure the resistance between pin 3 of the PTU harness connector (motor side) and the casing of the PTU Actuator Motor.
  Is the resistance higher than 20 megaohms?
  
  Yes
  - Go To 10
  No
  - Replace the Power Transfer Unit (PTU) Actuator Motor in accordance with the service information. Refer to ACTUATOR, SHIFT, REMOVAL AND INSTALLATION .
  - Perform the DTCM VERIFICATION Procedure. Refer to DTCM VERIFICATION TEST .
CHECK THE DRIVETRAIN CONTROL MODULE (DTCM) WIRE HARNESS FOR DAMAGE
1. Check that there are no loose or faulty connections due to oxidation or damage on the PTU or the DTCM harness connectors.
2. Check that the PTU and DTCM circuits are not faulty. In particular, that there are no open circuit or short circuit problems.
  Were any problems found?
  
  Yes
  - Repair the DTCM as needed.
  - Perform the DTCM VERIFICATION Procedure. Refer to DTCM VERIFICATION TEST .
  No
  - Go To 11
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all DTCM Module harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all DTCM Module harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read DTCM Module DTCs.
  Did the DTC return?
  
  Yes
  - Replace the DTCM Module in accordance with the Service information. Refer to MODULE, DRIVETRAIN CONTROL (DTCM), REMOVAL AND INSTALLATION .
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  No
  - Repair the poor connections as necessary.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .