Diagnostic Test

WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY THE DTC IS ACTIVE
NOTE:
This DTC must be active for the results of this test to be valid.
1. Perform any Technical Service Bulletins (TSBs) that may apply.
2. Ignition on, engine not running.
3. With the scan tool, read and record DTCs.
4. Using the scan tool, read and record Environmental Data.
5. With the scan tool, record and erase DTCs.
6. With the scan tool, read DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Perform the ABS-INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
ELECTRONIC STABILITY CONTROL (ESC) SWITCH
1. Turn the ignition off.
2. Disconnect the ESC Switch harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  Does the DTC remain active?
  
  Yes
  - Go To 3
  No
  - Replace the Electronic Stability Control (ESC) Switch in accordance with the Service Information. Refer to SWITCH, ELECTRONIC STABILITY PROGRAM (ESP) .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
ESC ON/OFF SENSE CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking ESC On/Off Sense Circuit For A Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the ABS Module harness connector.
3. Turn the ignition on.
4. Measure the voltage of the ESC ON/OFF Sense circuit at the ABS MODULE harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the ESC ON/OFF Sense circuit for a short to voltage.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Replace the Anti-lock Bake System (ABS) Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM, REMOVAL .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .