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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Communication - Non-DTC Based Diagnostics >> Diagnosis And Testing >> No Response From The Steering Angle Sensor (SAS) >> Diagnostic Test

Diagnostic Test

  1. TEST FOR INTERMITTENT CONDITION 
    NOTE:

    Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

    1. Turn the ignition on.
      NOTE:

      Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

    2. With the scan tool, select ECU View.
      NOTE:

      A red "X" will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.

      Does the scan tool display a red "X" next to the sensor?

      Yes 

      • Go To  2

      No 

      • The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
  2. (F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN OR SHORTED 
    Fig 1: Checking Fused Run/Start Relay Output Circuit Using 12-Volt Test Light Connected To Ground
    GC0102421Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Steering Angle Sensor harness connector.
    3. Turn the ignition on.
    4. Using a 12-volt test light connected to ground, check the (F943) Fused Run/Start Relay Output circuit.

      Does the test light illuminate brightly?

      Yes 

      • Go To  3

      No 

      • Repair the (F943) Fused Run/Start Relay Output circuit for an open or short.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. (Z910) GROUND CIRCUIT OPEN 
    Fig 2: Checking Ground Circuit Using 12-volt Test Light Connected To 12 Volts
    GC0102422Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Using a 12-volt test light connected to 12-volts, check the (Z910) ground circuit.

      Does the test light illuminate brightly?

      Yes 

      • Go To  4

      No 

      • Repair the (Z910) ground circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. (D65) CAN C BUS (+) CIRCUIT OPEN 
    Fig 3: Measuring Resistance Of CAN C Bus (+) Circuit
    GC0102423Courtesy of CHRYSLER GROUP, LLC
    1. Disconnect the TIPM C1 harness connector.
    2. Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM C1 harness connector and the Steering Angle Sensor connector.

      Is resistance below 5.0 ohms?

      Yes 

      • Go To  5

      No 

      • Repair the (D65) CAN C Bus (+) circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. (D64) CAN C BUS (-) CIRCUIT OPEN 
    Fig 4: Measuring Resistance Of CAN C Bus (-) Circuit
    GC0102424Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM C1 harness connector and the Steering Angle Sensor connector.

      Is resistance below 5.0 ohms?

      Yes 

      • Replace the Steering Angle Sensor in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Repair the (D264) CAN C Bus (-) circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .