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.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
  NOTE:
  If the P2102 is intermittent, it is possible that the controller is overheating in extreme hot temperatures and this is considered a normal protection operation. No repair is necessary.
2. With the scan tool, read DTCs.
3. Look closely at the temperatures at which this DTC set.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
ASD RELAY
1. Turn the ignition off.
2. Install a known good ASD relay.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 3
  No
  - Replace the ASD Relay.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
THROTTLE PLATE INSPECTION
1. Turn the ignition off.
2. Remove the Air Cleaner Assembly from the Throttle Body.
3. Check for any signs of a foreign material (ice or dirt) on the Throttle Plate or in the bore causing the Throttle Plate to stick.
  Were any signs of foreign material or scoring of the throttle plate or bore found?
  
  Yes
  - Remove the debris if possible or replace the Throttle Body Assembly. Refer to THROTTLE BODY, REMOVAL . Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and perform the THROTTLE BODY SELF LEARN.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 4
CHECK FOR THE ETC (+) DRIVER CIRCUIT SHORTED TO THE ETC (-) DRIVER CIRCUIT
1. Turn the ignition off.
2. Disconnect the Throttle Body harness connector.
3. Disconnect the PCM C2 harness connector.
4. Check for continuity between the ETC (+) circuit and the ETC (-) circuit at the appropriate terminals of the PCM harness connector.
  Is there continuity between the ETC (+) circuit and the ETC (-) circuit?
  
  Yes
  - Repair the short to between the ETC (+) Driver circuit and the ETC (-) Driver circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 5
CHECK THE ETC (+) DRIVER CIRCUIT FOR A SHORT TO GROUND
1. Check for continuity between ground and the ETC (+) Driver circuit at the Throttle Body harness connector.
  Is there continuity between ground and the ETC (+) Driver circuit?
  
  Yes
  - Repair the ETC (+) Driver circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 6
CHECK THE ETC (-) DRIVER CIRCUIT FOR A SHORT TO GROUND
1. Check for continuity between ground and the ETC (-) Driver circuit at the Throttle Body harness connector.
  Is there continuity between ground and the ETC (-) Driver circuit?
  
  Yes
  - Repair the ETC (-) Driver circuit short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 7
ETC MOTOR
1. Connect the Throttle Body harness connector.
2. Measure the resistance of the ETC Motor between the ETC (+) Driver circuit and the ETC (-) Driver circuit at the PCM C2 harness connector.
  Is the resistance between 1.5 and 1.9 Ohms at closed throttle?
  
  Yes
  - Go To 8
  No
  - Replace the Throttle Body Assembly. Refer to THROTTLE BODY, REMOVAL . Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and perform the THROTTLE BODY SELF LEARN.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Throttle Body and Powertrain Control Module connectors.
4. Perform any Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .