Diagnostic Test

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
NOTE:
This DTC must be active for the results of this test to be valid.
1. Perform any Service Bulletins that may apply
2. Turn the ignition on.
3. With the scan tool, read ABS DTCs and record on the repair order.
4. With the scan tool, read and record Environmental Data.
5. With the scan tool, erase ABS DTCs.
6. With scan tool, graph the steering angle while slowly rotating steering wheel from stop to stop.
7. With the scan tool, read ABS DTCs.
  Is the graph displaying erratic signal behavior or did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the ABS INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
VERIFY THE STEERING ANGLE SENSOR (SAS) IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. With the scan tool, verify the SAS is active on the bus.
  Is the SAS active on the bus?
  
  Yes
  - Go To 3
  No
  - Refer to NO RESPONSE FROM ECU and perform the NO RESPONSE FROM SAS (STEERING ANGLE SENSOR) diagnostic procedure.
PERFORM THE STEERING ANGLE SENSOR CALIBRATION ROUTINE
1. Turn the ignition on.
2. With the scan tool, perform the "Steering Angle Sensor Calibration" routine.
3. Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  Was the routine successful?
  
  Yes
  - Go To 4
  No
  - Perform the "Steering Angle Sensor Calibration" routine again, if still unsuccessful.
  - Replace the Steering Angle Sensor (SAS) in accordance with service information. Refer to CLOCKSPRING, REMOVAL AND INSTALLATION .
CHECK THE TERMINALS/CONNECTORS/WIRING HARNESS FOR DAMAGE
WARNING:
To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment.

NOTE:
Proper Steering Angle Sensor (SAS) installation is crucial for proper operation.
1. Inspect the Steering Angle Sensor (SAS).
2. Check all related wiring for bruised, chafed, pierced, or partially broken wires.
3. Check all related connectors for broken, bent, pushed out, or corroded terminals.
  Were any problems found?
  
  Yes
  - Replace the Steering Angle Sensor (SAS) in accordance with service information. Refer to CLOCKSPRING, REMOVAL AND INSTALLATION .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Replace the Anti-lock Brake System (ABS) Module in accordance with service information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL AND INSTALLATION .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .