Diagnostic Test

WARNING: This page is about a different car, the 2012 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
NOTE:
Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
1. Turn the ignition on.
  NOTE:
  Make sure the battery voltage is between 10.0 and 16.0 volts.
2. With the scan tool, read the module status.
  NOTE:
  Check the BCM for any active CAN hardware DTCs, perform DTC before proceeding.
  
  Does the scan tool indicate that the module is active on the bus?
  
  Yes
  - Go To 2.
  No
  - The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - DTCM VERIFICATION TEST .
CHECK THE (A913) FUSED B(+) CIRCUIT FOR AN OPEN OR SHORT CIRCUIT

Fig 1: Checking Fused B(+) Circuit For An Open Or Short Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the DTCM harness connector.
3. Using a 12-volt test light connected to ground, check the (A913) Fused B(+) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3.
  No
  - Repair the open or short in the (A913) Fused B(+) circuit.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - DTCM VERIFICATION TEST .
CHECK THE (Z901) GROUND CIRCUIT FOR AN OPEN

Fig 2: Checking Ground Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Using a 12-volt test light connected to 12-volts, check the (Z901) Ground circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4.
  No
  - Repair the open in the (Z901) Ground circuit.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - DTCM VERIFICATION TEST .
CHECK THE (F946) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT FOR AN OPEN OR SHORT

Fig 3: Checking Fused Ignition Switch Output (Run-Start) Circuit For An Open Or Short
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F946) Fused Ignition Switch Output (Run-Start) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5.
  No
  - Repair the open or short in the (F946) Fused Ignition Switch Output (Run-Start) circuit.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - DTCM VERIFICATION TEST .
CHECK THE (D65) AND (D64) CAN C BUS CIRCUITS FOR AN OPEN

Fig 4: Checking CAN C BUS Circuits For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Front CAN C Star Connector C12 harness connector.
3. Measure the resistance of the (D65) CAN C Bus (+) circuit between the Front CAN C Star Connector C12 harness connector and the DTCM harness connector.
4. Measure the resistance of the (D64) CAN C Bus (-) circuit between the Front CAN C Star Connector C12 harness connector and the DTCM harness connector.
  Are the resistances below 5.0 Ohms?
  
  Yes
  - Replace the Drivetrain Control Module (DTCM) in accordance with the Service Information. Refer to MODULE, DRIVETRAIN CONTROL, REMOVAL .
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - DTCM VERIFICATION TEST .
  No
  - Repair the open in the (D65) CAN C Bus (+) or (D64) CAN C Bus (-) circuit.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - DTCM VERIFICATION TEST .