Diagnostic Test

WARNING: This page is about a different car, the 2015 Jeep Renegade. 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 . .
DRIVETRAIN CONTROL MODULE (DTCM) WIRE HARNESS
1. Check that there are no loose or faulty connections due to oxidation or damage on pins 78, 56, 74 and 8 of the DTCM.
  Were any problems found?
  
  Yes
  - Repair the DTCM wire harness as needed.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
DRIVETRAIN CONTROL MODULE (DTCM) WIRE HARNESS
1. Connect a multimeter between pin 78 and 74 and between pin 56 and 74 of the DTCM, checking that the resistance value detected is between 1.5 and 2 kilohms.
  Is the resistance between 1.5 and 2 kilohms ?
  
  Yes
  - Go To 4
  No
  - Go To 5
DRIVETRAIN CONTROL MODULE (DTCM) WIRE HARNESS
1. Connect a multimeter between pin 78 and 8 and between pin 56 and 8 of the DTCM, checking that the resistance value detected is between 3 and 6 kilohms.
  Is the resistance between 3 and 6 kilohms?
  
  Yes
  - Go To 10
  No
  - Go To 5
REAR DIFFERENTIAL COUPLING MOTOR
1. Connect a multimeter between pin 10 and 4 and between pin 6 and 4 of the rear differential, checking that the resistance value detected is between 1.5 and 2 kilohms.
  Is the resistance between 1.5 and 2 kilohms ?
  
  Yes
  - Go To 6
  No
  - Replace the Rear Differential Coupling Motor in accordance with the service information.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
REAR DIFFERENTIAL COUPLING MOTOR
1. Connect a multimeter between pin 10 and 9 and between pin 6 and 9 of the rear differential, checking that the resistance value detected is between 3 and 6 kilohms
  Is the resistance between 3 and 6 kilohms ?
  
  Yes
  - Go To 7
  No
  - Replace the Rear Differential Coupling Motor in accordance with the service information.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
REAR DIFFERENTIAL COUPLING MOTOR
1. Connect a multimeter between pin 10 of the rear differential and the rear differential coupling control motor casing and check that the resistance value detected is higher than 20 megaohms.
  Is the resistance higher than 20 megaohms?
  
  Yes
  - Go To 8
  No
  - Replace the Rear Differential Coupling Motor in accordance with the service information.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
REAR DIFFERENTIAL COUPLING MOTOR
1. Connect a multimeter between pin 6 of the rear differential and the rear differential coupling control motor casing and check that the resistance value detected is higher than 20 megaohms.
  Is the resistance higher than 20 megaohms?
  
  Yes
  - Go To 9
  No
  - Replace the Rear Differential Coupling Motor in accordance with the service information.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
DRIVETRAIN CONTROL MODULE (DTCM) WIRE HARNESS
1. Check that the circuits between the RDM and the DTCM are not faulty. In particular, that there are no open circuit or short circuit problems.
  Were any problems found?
  
  Yes
  - Repair the DTCM wire harness as needed.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 10
DRIVETRAIN CONTROL MODULE (DTCM)
1. With the scan tool, erase DTCM DTCs.
2. Cycle the ignition off then back on.
3. With the scan tool, read the DTCM DTCs.
  Did this DTC reset?
  
  Yes
  - Go To 11
  No
  - Perform the INTERMITTENT CONDITIONS TEST. Refer to TESTING FOR AN INTERMITTENT CONDITION . .
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, REMOVAL AND INSTALLATION .
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  - Test complete.