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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 497 (Power Top Control Module ( PTCM) - Electrical Diagnostics) >> DTC Troubleshooting >> B2520-Convertible Top Header Latch Control Circuit Open Or Hardware THERMO Protection Active >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 Dodge Avenger and 2013 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.
  1. TEST FOR INTERMITTENT CONDITION 
    1. Turn the ignition on.
    2. With the scan tool, record and erase DTCs.
    3. With the scan tool, manually unlatch and latch the header several times (if possible).
    4. With the scan tool, read DTCs.

      Does the scan tool display B2520-CONVERTIBLE TOP HEADER LATCH CONTROL CIRCUIT OPEN OR HARDWARE THERMO PROTECTION ACTIVE?

      Yes 

      • Go To  2

      No 

      • The condition that caused this symptom is currently not present. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  2. HEADER LATCH MOTOR OVERHEATED 
    1. Turn the ignition off.
    2. Wait five minutes to allow the motor to cool down.
    3. Turn the ignition on.
    4. Using the power top switch, operate the Header Latch Motor to the full unlatched and latched positions several times (if possible).

      Does the motor operate properly?

      Yes 

      • Test complete. If the motor continues to set this DTC, replace the motor in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. HEADER LATCH MOTOR OPEN 
    Fig 1: Checking Header Latch Motor For An Open
    GC0123739Courtesy of CHRYSLER GROUP, LLC
    1. Disconnect the Header Latch Motor connector.
    2. Using a 12-volt test light, connect one end to the (Q980) Header Latch Motor Unlatch Driver circuit in the motor connector.
    3. Connect the other end of the 12-volt test light to the (Q979) Header Latch Motor Latch Driver circuit in the motor connector.
    4. Turn the ignition on.
    5. With the scan tool, manually operate the Header Latch Motor in both directions several times while observing the test light

      Does the test light illuminate brightly each time the motor is run in both directions?

      Yes 

      • Replace the Header Latch Motor in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. (Q979) HEADER LATCH MOTOR LATCH DRIVER CIRCUIT OPEN 
    Fig 2: Checking Header Latch Motor Latch Driver Circuit For Open
    GC0123740Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Power Top Control Module C2 connector.
    3. Measure the resistance of the (Q979) Header Latch Motor Latch Driver circuit between the PTCM C2 connector and the Motor connector.

      Is the resistance below 5.0 Ohms?

      No 

      • Repair the (Q979) Header Latch Motor Latch Driver circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      Yes 

      • Go To  5
  5. (Q980) HEADER LATCH MOTOR UNLATCH DRIVER CIRCUIT OPEN 
    Fig 3: Checking Header Latch Motor Unlatch Driver Circuit For Open
    GC0123741Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (Q980) Header Latch Motor Unlatch Driver circuit between the PTCM C2 connector and the Motor connector.

      Is the resistance below 5.0 Ohms?

      No 

      • Repair the (Q980) Header Latch Motor Unlatch Driver circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      Yes 

      • Replace the Power Top Control Module in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .