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Home >> Dodge and Ram >> 2009 >> Durango Base, 4.7 P, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Memory Modules >> (Front Control Module (FCM) - Electrical Diagnostics) >> DTC Troubleshooting >> B2112-5-Volt Supply Circuit Low >> Diagnostic Test
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Diagnostic Test

  1. CHECK FOR ACTIVE DTC 
    1. With the scan tool, read the active DTCs.
    2. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
    3. With the scan tool, read the active DTCs.

      Does the scan tool display this DTC as active?

      Yes 

      • Go to step  2

      No 

  2. A/C PRESSURE TRANSDUCER 
    1. Turn the ignition off.
    2. Disconnect the A/C Pressure Transducer harness connector.
    3. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
    4. With the scan tool, read the active DTCs.

      Does the scan tool display this DTC as active?

      Yes 

      • Go to step  3

      No 

  3. SHIFT MOTOR/MODE SENSOR ASSEMBLY 
    1. Turn the ignition off.
    2. Disconnect the Shift Motor/Mode Sensor Assembly harness connector.
    3. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
    4. With the scan tool, read the active DTCs.

      Does the scan tool display this DTC as active?

      Yes 

      • Go to step  4

      No 

  4. (T103) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND 
    Fig 1: Checking 5-Volt Supply Circuit
    GC0106201Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the FCM C1 harness connector.
    3. Measure the resistance between ground and the (T103) 5-volt Supply circuit.

      Is the resistance below 1000.0 Ohms?

      Yes 

      No