Diagnostic Test

WARNING: This page is about a different car, the 2020 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Ignition on, engine running.
2. Accelerate the engine above 1500 rpm for 30 seconds.
3. With the scan tool, read DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Go To 5
(F946) FUSED IGNITION RUN/START CONTROL OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE

Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Drivetrain Control Module (DTCM) harness connector.
3. Turn the ignition on.
4. With a 12-volt test light connected to ground, check the (F946) Fused Ignition Run/Start Control Output circuit at the DTCM 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 (F946) Fused Ignition Run/Start Control Output circuit or high resistance.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
(Z908) GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. With a 12-volt test light connected to B+, check the (Z908) Ground circuit at the DTCM 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 4
  No
  - Repair the (Z908) Ground circuit or high resistance.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
DTCM
NOTE:
Before continuing, check the DTCM harness connector terminals for corrosion, damage, or pushed out terminals. Repair as necessary.
1. Using the schematics as a guide, inspect the wire harness and connectors.
2. Pay particular attention to all Power and Ground circuit s.
  .
  
  Repair
  - Replace the DTCM in accordance with Service Information. Refer to MODULE, DRIVETRAIN CONTROL (DTCM), REMOVAL .
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
CHECK WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle test the wiring harness and connectors while checking for shorted and open circuit s.
4. With the scan tool, read the data related to this circuit while performing the wiggle test. Look for the data to change or for the DTC to reset.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  No
  - Test complete.