Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 1500. 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
  - 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 BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 2
CHECK THE (F923) FUSED RUN RELAY OUTPUT CIRCUIT FOR AN OPEN OR SHORT

Fig 1: Using 12-Volt Test Light Connected To Ground To Check Fused Ignition Run Control Output Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Park Assist Module C1 harness connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, check the (F923) Fused Run Relay Output circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Repair the open or short in the (F923) Fused Run Relay Output circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (Z906) GROUND CIRCUIT FOR AN OPEN

Fig 2: Using 12-Volt Test Light Connected To 12-Volts To Check Ground Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Using a 12-volt test light connected to 12-volts, check the (Z906) Ground circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the open in the (Z906) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (D77) AND (D78) CAN C BUS CIRCUITS FOR AN OPEN
2. Disconnect the CAN C IP Star Connector C12 harness connector.
3. Measure the resistance of the (D78) CAN C Bus (-) circuit between the CAN C IP Star Connector C12 harness connector and the Park Assist Module C1 harness connector.
4. Measure the resistance of the (D77) CAN C Bus (+) circuit between the CAN C IP Star Connector C12 harness connector and the Park Assist Module C1 harness connector.
  Are the resistances below 5.0 Ohms?
  
  Yes
  - Replace the Park Assist Module in accordance with the Service Information. Refer to MODULE, PARK ASSIST, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the open in the (D77) or (D78) CAN C Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .