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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 63 ((Heating & Air Conditioning (ATC) - Electrical Diagnostics - 1500, 2500 & 3500)) >> Diagnosis and Testing >> B10E9-Blower Motor Control Circuit Low >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK IF DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, read HVAC DTCs.
      NOTE:

      It can take up to 30 seconds or more for this DTC to mature.

      Is this DTC active?

      Yes 

      • Go To  2.

      No 

      • Go To  6.
  2. CHECK THE (C56) BLOWER CONTROL CIRCUIT FOR A SHORT TO GROUND 
    Fig 1: Checking Blower Control Circuit For Short
    GC0089934Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the Blower Module harness connector.
    3. Disconnect the A/C Heater Control harness connector.
    4. Measure the resistance between ground and the (C56) Blower Control circuit.

      Is the resistance below 100k Ohms?

      Yes 

      • Repair the (C56) Blower Control circuit for an short to ground.
      • Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST  .

      No 

      • Go To  3.
  3. CHECK THE (C56) BLOWER CONTROL CIRCUIT FOR AN OPEN 
    Fig 2: Checking Blower Control Circuit For Open
    GC0089935Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Measure the resistance of the (C56) Blower Control circuit between the A/C Heater Control harness connector and the Blower Module harness connector.

      Is the resistance above 100k Ohms?

      Yes 

      • Repair the (C56) Blower Control circuit for an open.
      • Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST  .

      No 

      • Go To  4.
  4. CHECK THE (Z911) GROUND CIRCUIT FOR AN OPEN 
    Fig 3: Checking Ground Circuit For Open
    GC0089936Courtesy of CHRYSLER LLC
    1. Using a 12-volt test light connected to 12-volts, check the (Z911) Ground circuit.
      NOTE:

      The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

      Does the test light illuminate brightly?

      Yes 

      • Repair the (C56) Blower Control circuit for an open.
      • Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST  .

      No 

      • Go To  5.
  5. CHECK THE BLOWER MODULE 
    1. Turn the ignition off to the lock position.
    2. Replace the Blower Module in accordance with the Service Information.
    3. Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST  .

      Did the DTC reset during or after the HVAC Verification Test?

      Yes 

      • Replace and program the A/C Heater Control in accordance with the Service Information.
      • Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST  .

      No 

      • Test complete.
  6. CHECK THE WIRING AND CONNECTORS 
    1. The conditions necessary to set the DTC are not present at this time.
    2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
    3. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, partially broken wires.
    4. Check the connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
    5. Wiggle the wiring and connectors while checking for shorted and open circuits.
    6. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set.

      Were there any problems found?

      Yes 

      No 

      • Test complete.
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