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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 492 ((Heating & Air Conditioning (ATC) - Electrical Diagnostics)) >> DTC Troubleshooting >> B1034-Infrared Temperature Sensor Input Circuit Low >> 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. CHECK IF DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, read HVAC DTCs.

      Is this DTC active?

      Yes 

      • Go To  2

      No 

      • Go To  10
  2. IDENTIFY THE VEHICLE 
    1. Pick below what best describes the vehicle you are working on.

      JS27 Two Door 

      • Go To  3

      JS41 Four Door 

      • Go To  6
  3. CHECK THE (F202) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT FOR AN OPEN (JS27) 
    Fig 1: Checking Ignition Switch Output (Run-Start) Circuit For Open
    GC0123514Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the Infrared Sensor harness connector.
    3. Ignition on, engine not running.
    4. With a test light connected to ground, check the (F202) Ignition Switch Output (Run-Start) 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 

      • Go To  4

      No 

      • Repair the (F202) Ignition Switch Output (Run-Start) circuit for an open.
      • Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE  .
  4. CHECK THE (C83) IR SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND (JS27) 
    Fig 2: Checking IR Sensor Signal Circuit For Short To Ground
    GC0123515Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the A/C Heater Control harness connector.
    3. Measure the resistance between ground and the (C83) IR Sensor Signal circuit.

      Is the resistance below 100k Ohms?

      Yes 

      • Repair the (C83) IR Sensor Signal circuit for a short to ground.
      • Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE  .

      No 

      • Go To  5
  5. CHECK THE (C83) IR SENSOR SIGNAL CIRCUIT FOR AN OPEN (JS27) 
    Fig 3: Checking IR Sensor Signal Circuit For Open
    GC0123516Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (C83) IR Sensor Signal circuit between the A/C Heater Control harness connector.

      Is the resistance below 100k Ohms?

      Yes 

      • Repair the (C83) IR Sensor Signal circuit for an open.
      • Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE  .

      No 

      • Go To  9
  6. CHECK THE (F202) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT FOR AN OPEN (JS41) 
    Fig 4: Checking Ignition Switch Output (Run-Start) Circuit For Open
    GC0123517Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the Infrared Sensor harness connector.
    3. Ignition on, engine not running.
    4. With a test light connected to ground, check the (F202) Ignition Switch Output (Run-Start) 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 

      • Go To  7

      No 

      • Repair the (F202) Ignition Switch Output (Run-Start) circuit for an open.
      • Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE  .
  7. CHECK THE (C83) IR SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND (JS41) 
    Fig 5: Measuring Resistance Between Ground And IR Sensor Signal Circuit
    GC0123518Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the A/C Heater Control harness connector.
    3. Measure the resistance between ground and the (C83) IR Sensor Signal circuit.

      Is the resistance below 100k Ohms?

      Yes 

      • Repair the (C83) IR Sensor Signal circuit for a short to ground.
      • Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE  .

      No 

      • Go To  8
  8. CHECK THE (C83) IR SENSOR SIGNAL CIRCUIT FOR AN OPEN (JS41) 
    Fig 6: Measuring Resistance Of IR Sensor Signal Circuit Between A/C Heater Control Harness Connector
    GC0123519Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (C83) IR Sensor Signal circuit between the A/C Heater Control harness connector.

      Is the resistance below 100k Ohms?

      Yes 

      • Repair the (C83) IR Sensor Signal circuit for an open.
      • Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE  .

      No 

      • Go To  9
  9. CHECK THE INFRARED SENSOR 
    1. Replace the Infrared Sensor in accordance with the Service Information.
    2. Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE  .

      Did the DTC reset performing 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 STANDARD PROCEDURE  .

      No 

      • Test complete.
  10. 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. 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.
    4. 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 

      • Repair as necessary.
      • Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE  .

      No 

      • Test complete.
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