300M, Concorde, Intrepid, LHS, 1998-2004

Diagnosis & Testing

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ABS Verification Test




NOTE
If the ABM (Anti-Lock Brake Module) was replaced, it must be initialized using the scan tool. If not initialized, the ABS and ESP indicators will flash continuously with no DTC's. To Initialize the ABM, using the scan tool, select ECU VIEW, select ABS, select MISCELLANEOUS, select INITIALIZE ECU, and follow the directions on the scan tool.

  1. Turn the ignition off.
  2.  
  3. Connect all previously disconnected components and connectors.
  4.  
  5. Ensure all accessories are turned off and the battery is fully charged.
    NOTE
    If the vehicle is equipped with ESP (Electronic Stability Program) the Steering Angle Sensor must be calibrated anytime an ABS component or the battery is disconnected. To calibrate the Steering Angle Sensor, start the engine and center the steering wheel. Turn the steering wheel all the way to the left until it stops, turn the steering wheel all the way to the right until it stops and bring the steering wheel back to center.

  6.  
  7. Ensure that the ignition is on, and with the scan tool, erase all Diagnostic Trouble Codes from All modules. Start the engine and allow it to run for 2 minutes and fully operate the system that was malfunctioning.
    CAUTION
    Ensure braking capability is available before road testing.

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  9. Turn the ignition off and wait 5 seconds. Turn the ignition on and using the scan tool, read DTC's from all modules.
  10.  
  11. If any Diagnostic Trouble Codes are present, return to symptom list and trouble shoot new or recurring symptom.
    NOTE
    For Sensor Signal and Pump Motor faults, the CAB must sense all 4 wheels at 25 km/h (15 mph) before it will extinguish the ABS Indicator.


    CAUTION
    Ensure braking capability is available before road testing.

  12.  
  13. If there are no DTC's present after turning ignition on, road test the vehicle for at least 5 minutes. Perform several antilock braking stops.
    1. Again, with the scan tool read DTC's . If any DTC's are present, return to Symptom list.
    2.  
    3. If there are no Diagnostic Trouble Codes (DTC's) present, and the customer's concern can no longer be duplicated, the repair is complete.
    4.  

  14.  

ABS Intermittent Condition

NOTE
The conditions that set the DTC are not present at this time. The following list may help in identifying the intermittent condition.


CAUTION
When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

  1. Refer to any Technical Service Bulletins (TSBs) that may apply.
  2.  
  3. Review the scan tool Freeze Frame information. If possible, try to duplicate the conditions under which the DTC set.
  4.  
  5. Turn the ignition off.
  6.  
  7. Visually inspect the related wire harness. Disconnect all the related harness connectors. Look for any chafed, pierced, pinched, partially broken wires and broken, bent, pushed out, or corroded terminals.
  8.  
  9. Perform a voltage drop test on the related circuits between the suspected faulty component and the Anti-Lock Brake Module.
  10.  
  11. Inspect and clean all PCM, ABS, engine, and chassis grounds that are related to the most current DTC.
  12.  
  13. If numerous trouble codes were set, use a wire schematic and look for any common ground or supply circuits
  14.  
  15. For any Relay DTCs, actuate the Relay with the scan tool and wiggle the related wire harness to try to interrupt the actuation.
  16.  
  17. Use the scan tool to perform a System Test if one applies to failing component.
  18.  
  19. A co-pilot, data recorder, and/or lab scope should be used to help diagnose intermittent conditions.
  20.  
  21. If there were any problems found during the above inspections perform the necessary repairs.
  22.  
  23. Perform ABS VERIFICATION TEST
  24.  
  25. If no problems were found during the above inspections the test is complete.
  26.  

APS Verification Test



  1. Make sure that all accessories are turned off and the battery is fully charged.
  2.  
  3. Make sure that all wiring and components are connected.
  4.  
  5. If the module or the pedal assembly was replaced, reprogram the Adjustable Pedals hard stop.
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  7. Move the Adjustable Pedals to full forward and continue to apply the switch for 10 seconds to learn the hard stop.
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  9. Repeat for the rearward direction.
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  11. Verify that the Adjustable Pedals System is disabled with the shifter in reverse and with the speed control engaged.
  12.  
  13. With the scan tool, clear DTCs in all modules.
  14.  
  15. Move the Adjustable Pedals Switch forward and rearward several times.
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  17. Turn the ignition off for 5 seconds, then turn the ignition on.
  18.  
  19. Using the scan tool, select view DTCs in all modules.
  20.  
  21. If there are any DTCs present the repair is not complete. Refer to the symptom list and perform the appropriate diagnostic procedure.
  22.  
  23. If no DTCs are present, the repair and the test are complete.
  24.  

APS Intermittent Condition

CAUTION
When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

  1. The DTC is not active at this time. The following list may help to identify an intermittent condition:

    Refer to any Technical Service Bulletins (TSBs) that may apply.
     
    Use DTC environmental data to try to duplicate the conditions in which the DTC was set.
     
    Turn the ignition off.
     
    Inspect the related wiring harness and connectors. Look for any chafed, pierced, pinched, partially broken wires, or broken, bent, pushed out, or corroded terminals.
     
    Perform a voltage drop test on the circuits between the component and the applicable module.
     
    If multiple DTCs are set, use a wiring schematic and inspect any common ground or supply circuits.
     
    Inspect and clean all ground circuits that are related to the most current DTC.
     
    Use the scan tool to perform a System Test or Actuation, if one applies to the component.
     
    Perform a wiggle test on the related wiring and connectors while monitoring the scan tool. Look for the DTC to reset of for data to change during the test.
     
    A co-pilot, data recorder, and/or lab scope should be used to diagnose an intermittent condition.
     

  2.  
  3. If there were any problems found during the above inspections perform the necessary repairs.
  4.  
  5. Perform ABS VERIFICATION TEST
  6.  
  7. If no problems were found during the above inspections the test is complete.
  8.  

 
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