Diagnostic Test

WARNING: This page is about a different car, the 2020 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 Instrument Panel Cluster (IPC) DTCs and record on the repair order.
2. Record the DTC Environmental Data.
3. With the scan tool, erase IPC DTCs.
4. Turn the ignition off.
5. Turn the ignition on.
6. With the scan tool, read IPC DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE (D403) LIN BUS CIRCUIT
1. Turn the ignition off.
  NOTE:
  Due to different vehicle configurations, each module listed below may not be equipped on the vehicle. The purpose of this test is to identify a module that may be causing this DTC to set. Various other DTCs may set during this diagnostic test, disregard any others that may set.
2. Disconnect one a time the following modules with the ignition off. It will be necessary to cycle the ignition off to on between each disconnection.
3. With the scan tool, monitor the DTC to change from active to stored between each disconnection.
4. Disconnect the Electronic Overhead Module harness connector.
5. Disconnect the Humidity Sensor harness connector.
6. Disconnect the Compass Module harness connector.
  Did the DTC change from Active to Stored after disconnecting any module?
  
  Yes
  - Replace the module that caused the DTC to change from Active to Stored in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (D403) LIN BUS CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
  NOTE:
  All available modules should still be disconnected.
2. Disconnect the IPC harness connector.
3. Check for continuity between ground and the (D403) LIN Bus circuit at the IPC harness connector.
  Is there continuity between ground and the (D403) LIN Bus circuit?
  
  Yes
  - Repair the (D403) LIN Bus circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (D403) LIN BUS CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Check the resistance of the (D403) LIN Bus circuit between IPC harness connector and each available module harness connector.
  Is the resistance below 1.0 Ohm for each available module?
  
  Yes
  - Go To 5
  No
  - Repair the (D403) LIN Bus circuit for an open or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D403) LIN BUS CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition on.
2. Measure the voltage of the (D403) LIN Bus circuit at the IPC harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (D403) LIN Bus circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 6
CHECK RELATED HARNESS CONNECTIONS
1. Turn the ignition off.
2. Disconnect all IPC harness connectors.
3. Disconnect all related in-line harness connections (if equipped).
4. Disconnect the related component harness connectors.
5. 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.
6. Reconnect all IPC harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. With the scan tool, erase DTCs.
10. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
11. With the scan tool, read IPC DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Instrument Panel Cluster (IPC) in accordance with the Service Information. Refer to REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.