Diagnostic Test

WARNING: This page is about a different car, the 2014 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete. 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.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE BRAKE FLUID LEVEL SWITCH FOR CORRECT OPERATION
1. Turn the ignition off.
2. Disconnect the Brake Fluid Level Switch harness connector.
3. Connect a jumper wire between the (B20) Brake Fluid Level Signal circuit and the (Z420) Ground circuit at the Brake Fluid Level Switch harness connector.
4. Turn the ignition on.
5. With the scan tool, read the Brake Fluid Level.
  Does the Brake Fluid Level display Low?
  
  Yes
  - Replace the Brake Fluid Level Switch in accordance with the Service Information. Refer to SWITCH, BRAKE FLUID LEVEL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK THE (B20) BRAKE FLUID LEVEL SIGNAL CIRCUIT FOR VOLTAGE
1. Measure the voltage between ground and the (B20) Brake Fluid Level Signal circuit.
  Is the voltage above 10.5 volts?
  
  Yes
  - Go To 5
  No
  - Go To 4
CHECK THE (B20) BRAKE FLUID LEVEL SIGNAL CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the BCM D harness connector.
3. Measure the resistance of the (B20) Brake Fluid Level Signal circuit between the Brake Fluid Level Switch and BCM D harness connectors.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (B20) Brake Fluid Level Signal circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (Z420) GROUND CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the BCM D harness connector.
3. Measure the resistance of the (Z420) Ground circuit between the BCM D and the Brake Fluid Level Switch harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the open in the (Z420) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .