Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR A DTC C1234-DRIVE TEST: SENSOR CLUSTER INSTALLATION
NOTE:
This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, read and record DTCs.
3. With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
4. Perform ECU initialization with drive test. Refer to ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
5. Start the engine.
6. With the scan tool, read and record DTCs.
  Does the scan tool display: C1234-DRIVE TEST: SENSOR CLUSTER INSTALLATION?
  
  Yes
  - Go To 2
  No
  - Perform the ABS-INTERMITTENT CONDITION TEST. Refer to STANDARD PROCEDURE .
CHECK THE DYNAMICS SENSOR INSTALLATION
NOTE:
Dynamics Sensor installation and mounting bolt torque is crucial for proper operation.
1. Turn the ignition off.
2. Check the Dynamics Sensor for damaged, modified, and bent mounting brackets.
3. Check the Dynamics Sensor mounting bolts for a loose or over tightened condition.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Dynamics Sensor in accordance with the Service Information.
  - Perform ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .