Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read the Module status.
  Does the scan tool indicate that the Module is active on the bus?
  
  Yes
  - The condition or conditions that originally set this DTC are 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 and repair as necessary. If no problems are found, test complete.
  No
  - Go To 2
CHECK THE (A924) FUSED B(+) CIRCUIT FOR AN OPEN OR SHORT TO GROUND
NOTE:
Leave the scan tool connected and on the initial network screen.
1. Turn the ignition off.
2. Disconnect the Driver Door Module C3 harness connector.
3. With a 12-volt test light connected to ground, check the (A924) Fused B(+) circuit at the Driver Door Module C3 harness connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Repair the (A924) Fused B(+) circuit for an open or short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (Z919) GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. With a 12-volt test light connected to 12 volts, check the (Z919) Ground circuit at the Driver Door Module C3 harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the (Z919) Ground circuit for an open or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE CAN IHS BUS (+) CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Measure the voltage of the (D104) CAN Interior Bus (+) circuit at Driver Door Module C3 harness connector.
  Is the voltage below 2.5 volts?
  
  Yes
  - Repair the (D104) CAN Interior Bus (+) circuit for an open or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5
CHECK THE CAN IHS BUS (-) CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Measure the voltage of the (D103) CAN Interior Bus (-) circuit at Driver Door Module C3 harness connector.
  Is the voltage below 1.3 volts?
  
  Yes
  - Repair the (D103) CAN Interior Bus (-) circuit for an open or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Driver Door Module in accordance with the Service Information. Refer to MODULE, DOOR (DDM/PDM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .