Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY DTC IS ACTIVE
NOTE:
Make sure the battery voltage is between 10 and 16 volts before proceeding.
1. With the scan tool, read active DTCs.
  Is this DTC active?
  
  Yes
  - Go To 2
  No
  - Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.
CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. With the scan tool, read active DTCs from all modules.
  NOTE:
  Check for BCM configuration, CAN Interior Bus hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
  
  Does the scan tool display any active DTCs to the conditions listed above?
  
  Yes
  - Go to DTC INDEX and perform the appropriate diagnostic procedure.
  No
  - Go To 3
VERIFY THE ITM IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. With the scan tool, verify the ITM is active on the bus.
  Is the ITM active on the bus?
  
  Yes
  - Go To 4
  No
  - Refer to NO RESPONSE FROM ITM (INTRUSION TRANSCEIVER MODULE) and perform the No Response from ITM diagnostic procedure.
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
1. With the scan tool, read all the DTCs.
  Is there more than one module with active DTCs "Logged Against" the ITM?
  
  Yes
  - Replace/update the ITM in accordance with the Service Information. Refer to MODULE, INTRUSION, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5
CLEAR DTC IN MODULE SETTING FAULT
1. With the scan tool, select the module setting the DTC against the ITM.
2. Clear active DTCs.
  Is this DTC still active?
  
  Yes
  - Replace/update the module that set this DTC in accordance with the Service Information.
  - Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 6
CYCLE IGNITION
1. Cycle the ignition from RUN to OFF three times ending with the key in the RUN position.
  Does this DTC become active?
  
  Yes
  - Go To 7
  No
  - The condition is not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the appropriate verification test for the module. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK FOR ADDITIONAL LOST COMMUNICATION FAULTS
1. With the scan tool, view the modules.
  Does the BCM and other CAN IHS BUS modules show Lost Communication with the remaining CAN IHS BUS modules?
  
  Yes
  - Go To 8
  No
  - Replace/update the module that set this DTC in accordance with the Service Information.
  - Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE CAN IHS BUS (125K) (+) CIRCUIT FOR A SHORT TO VOLTAGE

Fig 1: Checking CAN IHS BUS (125K) (+) Circuit For A Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Measure the voltage between the (D157) CAN IHS Bus (125K) (+) circuit and ground.
  Is the voltage above 5.0 volts?
  
  Yes
  - Repair the short to voltage in the CAN IHS Bus (125K) (+) circuit. The short to voltage is present in one of the CAN IHS Bus (125K) (+) circuits. Use the Star Connectors to isolate portions of the CAN IHS Bus (125K) (+) in order to locate the concern.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 9
CHECK THE CAN IHS BUS (125K) (-) CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking CAN IHS BUS (125K) (-) Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance between ground and the (D158) CAN IHS Bus (125K) (-) circuit.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short to ground in the CAN IHS Bus (125K) (-) circuit. The short to ground is present in one of the CAN IHS Bus (125K) (-) circuits. Use the Star Connectors to isolate portions of the CAN IHS Bus (125K) (-) in order to locate the concern.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace/update the module that set this DTC in accordance with the Service Information.
  - Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .